chore: mercury changes

.gitignore

@@ -0,0 +1,3 @@
+test.db
+*.mercury
+sour.is-mercury

.vscode/launch.json

@@ -0,0 +1,23 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${fileDirname}",
+            "cwd": "${workspaceFolder}"
+        },
+        {
+            "name": "Attach to Process",
+            "type": "go",
+            "request": "attach",
+            "mode": "local",
+            "processId": 0
+        }
+    ]
+}

cmd/testsql/main.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"database/sql"
+	"log"
+
+	_ "modernc.org/sqlite"
+)
+
+func main() {
+	db, err := sql.Open("sqlite", "./test.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	_, err = db.Exec(`drop table if exists foo`)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = db.Exec(`create table foo (bar jsonb)`)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = db.Exec(`insert into foo (bar) values ('["one"]')`)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rows, err := db.Query(`select j.value from foo, json_each(bar) j `)
+	if err != nil {
+		log.Fatal(err)
+	}
+	for rows.Next() {
+		var s string
+		err = rows.Scan(&s)
+		if err != nil {
+			log.Fatal(err)
+		}
+	
+		log.Println("GOT: ", s)
+	}
+}

cron/cron.go

@@ -127,9 +127,6 @@ func (c *cron) run(ctx context.Context, now time.Time) {
 	case <-timer.C:
 	}
 
-	span.AddEvent("Cron Run: " + now.Format(time.RFC822))
-	// fmt.Println("Cron Run: ", now.Format(time.RFC822))
-
 	c.state.Use(ctx, func(ctx context.Context, state *state) error {
 		run = append(run, state.queue...)
 		state.queue = state.queue[:0]
@@ -148,6 +145,9 @@ func (c *cron) run(ctx context.Context, now time.Time) {
 		return
 	}
 
+	span.AddEvent("Cron Run: " + now.Format(time.RFC822))
+	// fmt.Println("Cron Run: ", now.Format(time.RFC822))
+
 	wg, _ := errgroup.WithContext(ctx)
 
 	for i := range run {

env/env.go

@@ -9,35 +9,16 @@ import (
 	"strings"
 )
 
-func Default(name, defaultValue string) string {
+func Default(name, defaultValue string) (s string) {
 	name = strings.TrimSpace(name)
-	defaultValue = strings.TrimSpace(defaultValue)
+	s = strings.TrimSpace(defaultValue)
-	if v := strings.TrimSpace(os.Getenv(name)); v != "" {
-		slog.Info("env", name, v)
-		return v
-	}
-	slog.Info("env", name, defaultValue+" (default)")
-	return defaultValue
-}
 
-type secret string
+	if v, ok := os.LookupEnv(name); ok {
+		s = strings.TrimSpace(v)
+		slog.Info("env", slog.String(name, v))
+		return
+	}
 
-func (s secret) String() string {
+	slog.Info("env", slog.String(name, s+" (default)"))
-	if s == "" {
+	return
-		return "(nil)"
-	}
-	return "***"
-}
-func (s secret) Secret() string {
-	return string(s)
-}
-func Secret(name, defaultValue string) secret {
-	name = strings.TrimSpace(name)
-	defaultValue = strings.TrimSpace(defaultValue)
-	if v := strings.TrimSpace(os.Getenv(name)); v != "" {
-		slog.Info("env", name, secret(v))
-		return secret(v)
-	}
-	slog.Info("env", name, secret(defaultValue).String()+" (default)")
-	return secret(defaultValue)
 }

env/secret.go

@@ -0,0 +1,35 @@
+package env
+
+import (
+	"os"
+	"log/slog"
+	"strings"
+)
+
+type secret string
+
+func (s secret) String() string {
+	if s == "" {
+		return "(nil)"
+	}
+	return "***"
+}
+
+func (s secret) Secret() string {
+	return string(s)
+}
+
+func Secret(name, defaultValue string) (s secret) {
+	name = strings.TrimSpace(name)
+	s = secret(strings.TrimSpace(defaultValue))
+
+	if v, ok := os.LookupEnv(name); ok {
+		s = secret(strings.TrimSpace(v))
+		slog.Info("env", slog.String(name, s.String()))
+		return
+	}
+
+	slog.Info("env", slog.String(name, s.String()+" (default)"))
+	return
+}
+

go.mod

@@ -1,55 +1,81 @@
 module go.sour.is/pkg
 
-go 1.21
+go 1.22.0
 
 require (
-	github.com/99designs/gqlgen v0.17.34
+	github.com/99designs/gqlgen v0.17.44
 	github.com/golang-jwt/jwt/v4 v4.5.0
-	github.com/gorilla/websocket v1.5.0
+	github.com/gorilla/websocket v1.5.1
 	github.com/matryer/is v1.4.1
-	github.com/ravilushqa/otelgqlgen v0.13.1
+	github.com/ravilushqa/otelgqlgen v0.15.0
-	github.com/vektah/gqlparser/v2 v2.5.6
+	github.com/tursodatabase/go-libsql v0.0.0-20240322134723-08771dcdd2f1
-	go.opentelemetry.io/otel v1.18.0
+	github.com/vektah/gqlparser/v2 v2.5.11
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.18.0
+	go.opentelemetry.io/otel v1.23.1
-	go.opentelemetry.io/otel/sdk/metric v0.41.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.23.1
+	go.opentelemetry.io/otel/sdk/metric v1.23.1
+	go.sour.is/passwd v0.2.0
 	go.uber.org/multierr v1.11.0
-	golang.org/x/sync v0.3.0
+	golang.org/x/sync v0.6.0
 )
 
 require (
 	github.com/agnivade/levenshtein v1.1.1 // indirect
+	github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20230512164433-5d1fd1a340c9 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	github.com/felixge/httpsnoop v1.0.3 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/hashicorp/golang-lru/v2 v2.0.3 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
+	github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 // indirect
+	github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect
+	github.com/libsql/sqlite-antlr4-parser v0.0.0-20230802215326-5cb5bb604475 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16 // indirect
+	github.com/ncruces/go-strftime v0.1.9 // indirect
-	github.com/prometheus/common v0.44.0 // indirect
+	github.com/prometheus/client_model v0.5.0 // indirect
+	github.com/prometheus/common v0.47.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
-	go.opentelemetry.io/contrib v1.16.1 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20230711160842-782d3b101e98 // indirect
+	github.com/sosodev/duration v1.2.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect
+	go.opentelemetry.io/contrib v1.23.0 // indirect
+	google.golang.org/genproto v0.0.0-20240213162025-012b6fc9bca9 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240213162025-012b6fc9bca9 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240213162025-012b6fc9bca9 // indirect
+	modernc.org/gc/v3 v3.0.0-20240107210532-573471604cb6 // indirect
+	modernc.org/libc v1.41.0 // indirect
+	modernc.org/mathutil v1.6.0 // indirect
+	modernc.org/memory v1.7.2 // indirect
+	modernc.org/strutil v1.2.0 // indirect
+	modernc.org/token v1.1.0 // indirect
 )
 
 require (
+	github.com/BurntSushi/toml v1.3.2
+	github.com/Masterminds/squirrel v1.5.4
 	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
-	github.com/go-logr/logr v1.2.4 // indirect
+	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/golang/gddo v0.0.0-20210115222349-20d68f94ee1f
 	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.16.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.1 // indirect
-	github.com/prometheus/client_golang v1.17.0
+	github.com/oklog/ulid/v2 v2.1.0
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.44.0
+	github.com/prometheus/client_golang v1.18.0
-	go.opentelemetry.io/contrib/instrumentation/runtime v0.42.0
+	github.com/tursodatabase/go-libsql v0.0.0-20240322134723-08771dcdd2f1
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.18.0 // indirect
+	go.nhat.io/otelsql v0.12.0
-	go.opentelemetry.io/otel/exporters/prometheus v0.41.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.48.0
-	go.opentelemetry.io/otel/metric v1.18.0
+	go.opentelemetry.io/contrib/instrumentation/runtime v0.48.0
-	go.opentelemetry.io/otel/sdk v1.18.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.23.1 // indirect
-	go.opentelemetry.io/otel/trace v1.18.0
+	go.opentelemetry.io/otel/exporters/prometheus v0.45.2
-	go.opentelemetry.io/proto/otlp v1.0.0 // indirect
+	go.opentelemetry.io/otel/metric v1.23.1
-	golang.org/x/net v0.17.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.23.1
-	golang.org/x/sys v0.13.0 // indirect
+	go.opentelemetry.io/otel/trace v1.23.1
-	golang.org/x/text v0.13.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.1.0 // indirect
-	google.golang.org/grpc v1.58.0 // indirect
+	golang.org/x/exp v0.0.0-20240213143201-ec583247a57a
-	google.golang.org/protobuf v1.31.0 // indirect
+	golang.org/x/net v0.21.0 // indirect
+	golang.org/x/sys v0.17.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/grpc v1.61.1 // indirect
+	google.golang.org/protobuf v1.32.0 // indirect
+	modernc.org/sqlite v1.29.1
 )

go.sum

@@ -1,13 +1,26 @@
-github.com/99designs/gqlgen v0.17.34 h1:5cS5/OKFguQt+Ws56uj9FlG2xm1IlcJWNF2jrMIKYFQ=
+cloud.google.com/go v0.16.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/99designs/gqlgen v0.17.34/go.mod h1:Axcd3jIFHBVcqzixujJQr1wGqE+lGTpz6u4iZBZg1G8=
+github.com/99designs/gqlgen v0.17.44 h1:OS2wLk/67Y+vXM75XHbwRnNYJcbuJd4OBL76RX3NQQA=
+github.com/99designs/gqlgen v0.17.44/go.mod h1:UTCu3xpK2mLI5qcMNw+HKDiEL77it/1XtAjisC4sLwM=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
+github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
+github.com/DATA-DOG/go-sqlmock v1.5.0/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
+github.com/Masterminds/squirrel v1.5.4 h1:uUcX/aBc8O7Fg9kaISIUsHXdKuqehiXAMQTYX8afzqM=
+github.com/Masterminds/squirrel v1.5.4/go.mod h1:NNaOrjSoIDfDA40n7sr2tPNZRfjzjA400rg+riTZj10=
 github.com/agnivade/levenshtein v1.1.1 h1:QY8M92nrzkmr798gCo3kmMyqXFzdQVpxLlGPRBij0P8=
 github.com/agnivade/levenshtein v1.1.1/go.mod h1:veldBMzWxcCG2ZvUTKD2kJNRdCk5hVbJomOvKkmgYbo=
 github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883 h1:bvNMNQO63//z+xNgfBlViaCIJKLlCJ6/fmUseuG0wVQ=
 github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883/go.mod h1:rCTlJbsFo29Kk6CurOXKm700vrz8f0KW0JNfpkRJY/8=
+github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20230512164433-5d1fd1a340c9 h1:goHVqTbFX3AIo0tzGr14pgfAW2ZfPChKO21Z9MGf/gk=
+github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20230512164433-5d1fd1a340c9/go.mod h1:pSwJ0fSY5KhvocuWSx4fz3BA8OrA1bQn+K1Eli3BRwM=
 github.com/arbovm/levenshtein v0.0.0-20160628152529-48b4e1c0c4d0 h1:jfIu9sQUG6Ig+0+Ap1h4unLjW6YQJpKZVmUzxsD4E/Q=
 github.com/arbovm/levenshtein v0.0.0-20160628152529-48b4e1c0c4d0/go.mod h1:t2tdKJDJF9BV14lnkjHmOQgcvEKgtqs5a1N3LNdJhGE=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/bool64/shared v0.1.5 h1:fp3eUhBsrSjNCQPcSdQqZxxh9bBwrYiZ+zOKFkM0/2E=
+github.com/bool64/shared v0.1.5/go.mod h1:081yz68YC9jeFB3+Bbmno2RFWvGKv1lPKkMP6MHJlPs=
+github.com/bradfitz/gomemcache v0.0.0-20170208213004-1952afaa557d/go.mod h1:PmM6Mmwb0LSuEubjR8N7PtNe1KxZLtOUHtbeikc5h60=
 github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
 github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
@@ -17,106 +30,212 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/trifles v0.0.0-20200323201526-dd97f9abfb48 h1:fRzb/w+pyskVMQ+UbP35JkH8yB7MYb4q/qhBarqZE6g=
 github.com/dgryski/trifles v0.0.0-20200323201526-dd97f9abfb48/go.mod h1:if7Fbed8SFyPtHLHbg49SI7NAdJiC5WIA09pe59rfAA=
-github.com/felixge/httpsnoop v1.0.3 h1:s/nj+GCswXYzN5v2DpNMuMQYe+0DDwt5WVCU6CWBdXk=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
-github.com/felixge/httpsnoop v1.0.3/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
+github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
+github.com/fsnotify/fsnotify v1.4.3-0.20170329110642-4da3e2cfbabc/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/garyburd/redigo v1.1.1-0.20170914051019-70e1b1943d4f/go.mod h1:NR3MbYisc3/PwhQ00EMzDiPmrwpPxAn5GI05/YaO1SY=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
-github.com/go-logr/logr v1.2.4 h1:g01GSCwiDw2xSZfjJ2/T9M+S6pFdcNtFYsp+Y43HYDQ=
+github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
-github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/go-stack/stack v1.6.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/golang-jwt/jwt/v4 v4.5.0 h1:7cYmW1XlMY7h7ii7UhUyChSgS5wUJEnm9uZVTGqOWzg=
 github.com/golang-jwt/jwt/v4 v4.5.0/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
-github.com/golang/glog v1.1.0 h1:/d3pCKDPWNnvIWe0vVUpNP32qc8U3PDVxySP/y360qE=
+github.com/golang/gddo v0.0.0-20210115222349-20d68f94ee1f h1:16RtHeWGkJMc80Etb8RPCcKevXGldr57+LOyZt8zOlg=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/gddo v0.0.0-20210115222349-20d68f94ee1f/go.mod h1:ijRvpgDJDI262hYq/IQVYgf8hd8IHUs93Ol0kvMBAx4=
+github.com/golang/lint v0.0.0-20170918230701-e5d664eb928e/go.mod h1:tluoj9z5200jBnyusfRPU2LqT6J+DAorxEvtC7LHB+E=
+github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
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go.work

@@ -0,0 +1,6 @@
+go 1.22.0
+
+use (
+	.
+	../go-tools
+)

go.work.sum

@@ -0,0 +1,334 @@
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ident/ident.go

@@ -0,0 +1,115 @@
+package ident
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"sort"
+
+	"github.com/oklog/ulid/v2"
+	"go.sour.is/passwd"
+)
+
+// Ident interface for a logged in user
+type Ident interface {
+	Identity() string
+	Session() *SessionInfo
+}
+
+type SessionInfo struct {
+	SessionID ulid.ULID
+	Active    bool
+}
+
+func (s *SessionInfo) Session() *SessionInfo { return s }
+
+// Handler handler function to read ident from HTTP request
+type Handler interface {
+	ReadIdent(r *http.Request) (Ident, error)
+}
+type HandleGet interface {
+	GetIdent(context.Context /* identity */, string) (Ident, error)
+}
+type HandleRegister interface {
+	RegisterIdent(ctx context.Context, identity, displayName string, passwd []byte) (Ident, error)
+}
+
+type source struct {
+	Handler
+	priority int
+}
+
+var contextKey = struct{ key string }{"ident"}
+
+func FromContext(ctx context.Context) Ident {
+	if id, ok := ctx.Value(contextKey).(Ident); ok {
+		return id
+	}
+	return Anonymous
+}
+
+type IDM struct {
+	rand    io.Reader
+	sources []source
+	pwd     *passwd.Passwd
+}
+
+func NewIDM(pwd *passwd.Passwd, rand io.Reader) *IDM {
+	return &IDM{pwd: pwd, rand: rand}
+}
+
+func (idm *IDM) Add(p int, h Handler) {
+	idm.sources = append(idm.sources, source{priority: p, Handler: h})
+	sort.Slice(idm.sources, func(i, j int) bool { return idm.sources[i].priority < idm.sources[j].priority })
+}
+
+func (idm *IDM) Passwd(pass, hash []byte) ([]byte, error) {
+	return idm.pwd.Passwd(pass, hash)
+}
+
+// ReadIdent read ident from a list of ident handlers
+func (idm *IDM) ReadIdent(r *http.Request) (Ident, error) {
+	var errs error
+	for _, source := range idm.sources {
+		u, err := source.ReadIdent(r)
+		errs = errors.Join(errs, err)
+
+		if u != nil && u.Session().Active {
+			return u, errs
+		}
+	}
+
+	return Anonymous, errs
+}
+
+func (idm *IDM) RegisterIdent(ctx context.Context, identity, displayName string, passwd []byte) (Ident, error) {
+	for _, source := range idm.sources {
+		if source, ok := source.Handler.(HandleRegister); ok {
+			return source.RegisterIdent(ctx, identity, displayName, passwd)
+		}
+	}
+
+	return nil, fmt.Errorf("no HandleRegister source registered")
+}
+
+func (idm *IDM) GetIdent(ctx context.Context, identity string) (Ident, error) {
+	for _, source := range idm.sources {
+		if source, ok := source.Handler.(HandleGet); ok {
+			return source.GetIdent(ctx, identity)
+		}
+	}
+
+	return nil, fmt.Errorf("no HandleGet source registered")
+}
+
+func (idm *IDM) NewSessionInfo() (session SessionInfo, err error) {
+	session.SessionID, err = ulid.New(ulid.Now(), idm.rand)
+	if err != nil {
+		return
+	}
+	session.Active = true
+
+	return session, nil
+}

ident/null-user.go

@@ -0,0 +1,75 @@
+package ident
+
+import "net/http"
+
+// nullUser implements a null ident
+type nullUser struct {
+	identity    string
+	aspect      string
+	displayName string
+	SessionInfo
+}
+
+// Anonymous is a logged out user
+var Anonymous = NewNullUser("anon", "none", "Guest User", false)
+
+// NewNullUser creates a null user ident
+func NewNullUser(ident, aspect, name string, active bool) *nullUser {
+	return &nullUser{ident, aspect, name, SessionInfo{Active: active}}
+}
+
+func (id nullUser) String() string {
+	return "id: " + id.identity + " dn: " + id.displayName
+}
+
+// GetIdentity returns identity
+func (m nullUser) Identity() string {
+	return m.identity
+}
+
+// GetAspect returns aspect
+func (m nullUser) Aspect() string {
+	return m.aspect
+}
+
+// HasRole returns true if matches role
+func (m nullUser) Role(r ...string) bool {
+	return m.Active
+}
+
+// HasGroup returns true if matches group
+func (m nullUser) Group(g ...string) bool {
+	return m.Active
+}
+
+// GetGroups returns empty list
+func (m nullUser) Groups() []string {
+	return []string{}
+}
+
+// GetRoles returns empty list
+func (m nullUser) Roles() []string {
+	return []string{}
+}
+
+// GetMeta returns empty list
+func (m nullUser) Meta() map[string]string {
+	return make(map[string]string)
+}
+
+// IsActive returns true if active
+func (m nullUser) IsActive() bool {
+	return m.Active
+}
+
+// GetDisplay returns display name
+func (m nullUser) Display() string {
+	return m.displayName
+}
+
+// MakeHandlerFunc returns handler func
+func (m nullUser) HandlerFunc() func(r *http.Request) Ident {
+	return func(r *http.Request) Ident {
+		return &m
+	}
+}

ident/routes.go

@@ -0,0 +1,249 @@
+package ident
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"go.sour.is/pkg/lg"
+)
+
+var (
+	loginForm = func(nick string, valid bool) string {
+		indicator := ""
+		if !valid {
+			indicator = `class="invalid"`
+		}
+		if nick != "" {
+			nick = `value="` + nick + `"`
+		}
+		return `
+	<form id="login" hx-post="ident/session" hx-target="#login" hx-swap="outerHTML">
+		<input required id="login-identity" name="identity" type="text" ` + nick + `placeholder="Identity..." />
+		<input required id="login-passwd" name="passwd" type="password" ` + indicator + ` placeholder="Password..." />
+
+		<button type="submit">Login</button>
+		<button hx-get="ident/register">Register</button>
+	</form>`
+	}
+	logoutForm = func(id Ident) string {
+		display := id.Identity()
+		if id, ok := id.(interface{ DisplayName() string }); ok {
+			display = id.DisplayName()
+		}
+		return `<button id="login" hx-delete="ident/session" hx-target="#login" hx-swap="outerHTML">` + display + ` (logout)</button>`
+	}
+	registerForm = `
+	<form id="login" hx-post="ident/register" hx-target="#login" hx-swap="outerHTML">
+		<input required id="register-display" name="displayName" type="text" placeholder="Display Name..." />
+		<input required id="register-identity" name="identity" type="text" placeholder="Identity..." />
+		<input required id="register-passwd" name="passwd" type="password" placeholder="Password..." />
+
+		<button type="submit">Register</button>
+		<button hx-get="ident" hx-target="#login" hx-swap="outerHTML">Close</button>
+	</form>`
+)
+
+type sessionIF interface {
+	ReadIdent(r *http.Request) (Ident, error)
+	CreateSession(context.Context, http.ResponseWriter, Ident) error
+	DestroySession(context.Context, http.ResponseWriter, Ident) error
+}
+
+type root struct {
+	idm     *IDM
+	session sessionIF
+}
+
+func NewHTTP(idm *IDM, session sessionIF) *root {
+	idm.Add(0, session)
+	return &root{
+		idm:     idm,
+		session: session,
+	}
+}
+
+func (s *root) RegisterHTTP(mux *http.ServeMux) {
+	mux.HandleFunc("/ident", s.sessionHTTP)
+	mux.HandleFunc("/ident/register", s.registerHTTP)
+	mux.HandleFunc("/ident/session", s.sessionHTTP)
+}
+func (s *root) RegisterAPIv1(mux *http.ServeMux) {
+	mux.HandleFunc("GET /ident", s.sessionV1)
+	mux.HandleFunc("POST /ident", s.registerV1)
+	mux.HandleFunc("/ident/session", s.sessionV1)
+}
+func (s *root) RegisterMiddleware(hdlr http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		ctx, span := lg.Span(r.Context())
+		defer span.End()
+		r = r.WithContext(ctx)
+
+		id, err := s.idm.ReadIdent(r)
+		span.RecordError(err)
+		if id == nil {
+			id = Anonymous
+		}
+
+		r = r.WithContext(context.WithValue(r.Context(), contextKey, id))
+
+		hdlr.ServeHTTP(w, r)
+	})
+}
+
+func (s *root) sessionV1(w http.ResponseWriter, r *http.Request) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	var id Ident = FromContext(ctx)
+	switch r.Method {
+	case http.MethodGet:
+		if id == nil {
+			http.Error(w, "NO_AUTH", http.StatusUnauthorized)
+			return
+		}
+		fmt.Fprint(w, id)
+	case http.MethodPost:
+		if !id.Session().Active {
+			http.Error(w, "NO_AUTH", http.StatusUnauthorized)
+			return
+		}
+	
+		err := s.session.CreateSession(ctx, w, id)
+		if err != nil {
+			span.RecordError(err)
+			http.Error(w, "ERR", http.StatusInternalServerError)
+			return
+		}
+	
+		fmt.Fprint(w, id)
+	
+	case http.MethodDelete:
+		if !id.Session().Active {
+			http.Error(w, "NO_AUTH", http.StatusUnauthorized)
+			return
+		}
+
+		err := s.session.DestroySession(ctx, w, FromContext(ctx))
+		if err != nil {
+			span.RecordError(err)
+			http.Error(w, "ERR", http.StatusInternalServerError)
+			return
+		}
+	
+		http.Error(w, "GONE", http.StatusGone)
+	
+	default:
+		http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
+		return
+	}
+}
+func (s *root) registerV1(w http.ResponseWriter, r *http.Request) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	r.ParseForm()
+
+	identity := r.Form.Get("identity")
+	display := r.Form.Get("displayName")
+	passwd, err := s.idm.Passwd([]byte(r.Form.Get("passwd")), nil)
+	if err != nil {
+		http.Error(w, "ERR", http.StatusInternalServerError)
+		return
+	}
+
+	_, err = s.idm.RegisterIdent(ctx, identity, display, passwd)
+	if err != nil {
+		http.Error(w, "ERR", http.StatusInternalServerError)
+		return
+	}
+
+	http.Error(w, "OK "+identity, http.StatusCreated)
+}
+
+func (s *root) sessionHTTP(w http.ResponseWriter, r *http.Request) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	id := FromContext(ctx)
+
+	switch r.Method {
+	case http.MethodGet:
+		if id.Session().Active {
+			fmt.Fprint(w, logoutForm(id))
+			return
+		}
+		fmt.Fprint(w, loginForm("", true))
+	case http.MethodPost:
+		if !id.Session().Active {
+			http.Error(w, loginForm("", false), http.StatusOK)
+			return
+		}
+	
+		err := s.session.CreateSession(ctx, w, id)
+		span.RecordError(err)
+		if err != nil {
+			http.Error(w, "ERROR", http.StatusInternalServerError)
+			return
+		}
+	
+		fmt.Fprint(w, logoutForm(id))
+	case http.MethodDelete:
+		err := s.session.DestroySession(ctx, w, FromContext(ctx))
+		span.RecordError(err)
+		if err != nil {
+			http.Error(w, loginForm("", true), http.StatusUnauthorized)
+			return
+		}
+	
+		fmt.Fprint(w, loginForm("", true))
+	default:
+		http.Error(w, "ERROR", http.StatusMethodNotAllowed)
+	}
+}
+func (s *root) registerHTTP(w http.ResponseWriter, r *http.Request) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	switch r.Method {
+	case http.MethodGet:
+		fmt.Fprint(w, registerForm)
+		return
+	case http.MethodPost:
+		// break
+	default:
+		http.Error(w, "ERR", http.StatusMethodNotAllowed)
+		return
+
+	}
+
+	r.ParseForm()
+	identity := r.Form.Get("identity")
+	display := r.Form.Get("displayName")
+
+	passwd, err := s.idm.Passwd([]byte(r.Form.Get("passwd")), nil)
+	if err != nil {
+		http.Error(w, "ERR", http.StatusInternalServerError)
+		return
+	}
+
+	id, err := s.idm.RegisterIdent(ctx, identity, display, passwd)
+	if err != nil {
+		http.Error(w, "ERR", http.StatusInternalServerError)
+		return
+	}
+
+	if !id.Session().Active {
+		http.Error(w, loginForm("", false), http.StatusUnauthorized)
+		return
+	}
+
+	err = s.session.CreateSession(ctx, w, id)
+	span.RecordError(err)
+	if err != nil {
+		http.Error(w, "ERROR", http.StatusInternalServerError)
+		return
+	}
+
+	http.Error(w, logoutForm(id), http.StatusCreated)
+}

ident/source/mercury.go

@@ -0,0 +1,280 @@
+package source
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/mercury"
+	"go.sour.is/pkg/ident"
+)
+
+const identNS = "ident."
+const identSFX = ".credentials"
+
+type registry interface {
+	GetIndex(ctx context.Context, match, search string) (c mercury.Config, err error)
+	GetConfig(ctx context.Context, match, search, fields string) (mercury.Config, error)
+	WriteConfig(ctx context.Context, spaces mercury.Config) error
+}
+
+type mercuryIdent struct {
+	identity string
+	display  string
+	passwd   []byte
+	ed25519  []byte
+	ident.SessionInfo
+}
+
+func (id *mercuryIdent) Identity() string    { return id.identity }
+func (id *mercuryIdent) DisplayName() string { return id.display }
+func (id *mercuryIdent) Space() string       { return identNS + "@" + id.identity }
+
+func (id *mercuryIdent) FromConfig(cfg mercury.Config) error {
+	if id == nil {
+		return fmt.Errorf("nil ident")
+	}
+
+	for _, s := range cfg {
+		if !strings.HasPrefix(s.Space, identNS) {
+			continue
+		}
+		if id.identity == "" {
+			_, id.identity, _ = strings.Cut(s.Space, ".@")
+			id.identity, _, _ = strings.Cut(id.identity, ".")
+		}
+
+		switch {
+		case strings.HasSuffix(s.Space, ".credentials"):
+			id.passwd = []byte(s.FirstValue("passwd").First())
+		default:
+			id.display = s.FirstValue("displayName").First()
+		}
+	}
+	return nil
+}
+
+func (id *mercuryIdent) ToConfig() mercury.Config {
+	space := id.Space()
+	return mercury.Config{
+		&mercury.Space{
+			Space: space,
+			List: []mercury.Value{
+				{
+					Space:  space,
+					Seq:    1,
+					Name:   "displayName",
+					Values: []string{id.display},
+				},
+				{
+					Space:  space,
+					Seq:    2,
+					Name:   "lastLogin",
+					Values: []string{time.UnixMilli(int64(id.Session().SessionID.Time())).Format(time.RFC3339)},
+				},
+			},
+		},
+		&mercury.Space{
+			Space: space + identSFX,
+			List: []mercury.Value{
+				{
+					Space:  space + identSFX,
+					Seq:    1,
+					Name:   "passwd",
+					Values: []string{string(id.passwd)},
+				},
+			},
+		},
+	}
+}
+
+func (id *mercuryIdent) String() string {
+	return "id: " + id.identity + " sp: " + id.Space() + " dn: " + id.display // + " ps: " + string(id.passwd)
+}
+
+func (id *mercuryIdent) HasRole(r ...string) bool {
+	return false
+}
+
+type mercurySource struct {
+	r   registry
+	idm *ident.IDM
+}
+
+func NewMercury(r registry, pwd *ident.IDM) *mercurySource {
+	return &mercurySource{r, pwd}
+}
+
+func (s *mercurySource) ReadIdent(r *http.Request) (ident.Ident, error) {
+	if id, err := s.readIdentBasic(r); id != nil {
+		return id, err
+	}
+
+	if id, err := s.readIdentURL(r); id != nil {
+		return id, err
+	}
+
+	if id, err := s.readIdentHTTP(r); id != nil {
+		return id, err
+	}
+
+	return nil, fmt.Errorf("no auth")
+}
+
+func (s *mercurySource) readIdentURL(r *http.Request) (ident.Ident, error) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	pass, ok := r.URL.User.Password()
+
+	if !ok {
+		return nil, nil
+	}
+
+	id := &mercuryIdent{
+		identity: r.URL.User.Username(),
+		passwd:   []byte(pass),
+	}
+
+	space := id.Space()
+	c, err := s.r.GetConfig(ctx, "trace:"+space+identSFX, "", "")
+	if err != nil {
+		span.RecordError(err)
+		return id, err
+	}
+	var current mercuryIdent
+	current.FromConfig(c)
+	if len(current.passwd) == 0 {
+		return nil, fmt.Errorf("not registered")
+	}
+	_, err = s.idm.Passwd(id.passwd, current.passwd)
+	if err != nil {
+		return id, err
+	}
+	current.SessionInfo, err = s.idm.NewSessionInfo()
+	if err != nil {
+		return id, err
+	}
+
+	err = s.r.WriteConfig(ctx, current.ToConfig())
+	if err != nil {
+		return &current, err
+	}
+
+	return &current, nil
+}
+
+func (s *mercurySource) readIdentBasic(r *http.Request) (ident.Ident, error) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	user, pass, ok := r.BasicAuth()
+
+	if !ok {
+		return nil, nil
+	}
+
+	id := &mercuryIdent{
+		identity: user,
+		passwd:   []byte(pass),
+	}
+
+	space := id.Space()
+	c, err := s.r.GetConfig(ctx, "trace:"+space+identSFX, "", "")
+	if err != nil {
+		span.RecordError(err)
+		return id, err
+	}
+	var current mercuryIdent
+	current.FromConfig(c)
+	if len(current.passwd) == 0 {
+		return nil, fmt.Errorf("not registered")
+	}
+	_, err = s.idm.Passwd(id.passwd, current.passwd)
+	if err != nil {
+		return id, err
+	}
+	current.SessionInfo, err = s.idm.NewSessionInfo()
+	if err != nil {
+		return id, err
+	}
+
+	err = s.r.WriteConfig(ctx, current.ToConfig())
+	if err != nil {
+		return &current, err
+	}
+
+	return &current, nil
+}
+
+func (s *mercurySource) readIdentHTTP(r *http.Request) (ident.Ident, error) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	if r.Method != http.MethodPost {
+		return nil, fmt.Errorf("method not allowed")
+	}
+	r.ParseForm()
+	id := &mercuryIdent{
+		identity: r.Form.Get("identity"),
+		passwd:   []byte(r.Form.Get("passwd")),
+	}
+
+	if id.identity == "" {
+		return nil, nil
+	}
+
+	space := id.Space()
+	c, err := s.r.GetConfig(ctx, "trace:"+space+identSFX, "", "")
+	if err != nil {
+		span.RecordError(err)
+		return id, err
+	}
+	var current mercuryIdent
+	current.FromConfig(c)
+	if len(current.passwd) == 0 {
+		return nil, fmt.Errorf("not registered")
+	}
+	_, err = s.idm.Passwd(id.passwd, current.passwd)
+	if err != nil {
+		return id, err
+	}
+	current.SessionInfo, err = s.idm.NewSessionInfo()
+	if err != nil {
+		return id, err
+	}
+
+	err = s.r.WriteConfig(ctx, current.ToConfig())
+	if err != nil {
+		return &current, err
+	}
+
+	return &current, nil
+}
+
+func (s *mercurySource) RegisterIdent(ctx context.Context, identity, display string, passwd []byte) (ident.Ident, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	id := &mercuryIdent{identity: identity, display: display, passwd: passwd}
+	space := id.Space()
+
+	_, err := s.r.GetIndex(ctx, space, "")
+	if err != nil {
+		return nil, err
+	}
+
+	id.SessionInfo, err = s.idm.NewSessionInfo()
+	if err != nil {
+		return id, err
+	}
+
+	err = s.r.WriteConfig(ctx, id.ToConfig())
+	if err != nil {
+		return nil, err
+	}
+	return id, nil
+}

ident/source/session.go

@@ -0,0 +1,83 @@
+package source
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/oklog/ulid/v2"
+	"go.sour.is/pkg/ident"
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/locker"
+)
+
+const CookieName = "sour.is-ident"
+
+type sessions map[ulid.ULID]ident.Ident
+
+type session struct {
+	cookieName string
+	sessions   *locker.Locked[sessions]
+}
+
+func NewSession(cookieName string) *session {
+	return &session{
+		cookieName: cookieName,
+		sessions:   locker.New(make(sessions)),
+	}
+}
+
+func (s *session) ReadIdent(r *http.Request) (ident.Ident, error) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	cookie, err := r.Cookie(s.cookieName)
+	span.RecordError(err)
+	if err != nil {
+		return nil, nil
+	}
+
+	sessionID, err := ulid.Parse(cookie.Value)
+	span.RecordError(err)
+
+	var id ident.Ident = ident.Anonymous
+	if err == nil {
+		err = s.sessions.Use(ctx, func(ctx context.Context, sessions sessions) error {
+			if session, ok := sessions[sessionID]; ok {
+				id = session
+			}
+			return nil
+		})
+	}
+	span.RecordError(err)
+
+	return id, err
+}
+
+func (s *session) CreateSession(ctx context.Context, w http.ResponseWriter, id ident.Ident) error {
+	http.SetCookie(w, &http.Cookie{
+		Name:     s.cookieName,
+		Value:    id.Session().SessionID.String(),
+		Expires:  time.Time{},
+		Path:     "/",
+		Secure:   false,
+		HttpOnly: true,
+	})
+
+	return s.sessions.Use(ctx, func(ctx context.Context, sessions sessions) error {
+		sessions[id.Session().SessionID] = id
+		return nil
+	})
+}
+
+func (s *session) DestroySession(ctx context.Context, w http.ResponseWriter, id ident.Ident) error {
+	session := id.Session()
+	session.Active = false
+
+	http.SetCookie(w, &http.Cookie{Name: s.cookieName, MaxAge: -1})
+
+	return s.sessions.Use(ctx, func(ctx context.Context, sessions sessions) error {
+		delete(sessions, session.SessionID)
+		return nil
+	})
+}

lg/tracer.go

@@ -58,17 +58,56 @@ type wrapSpan struct {
 	trace.Span
 }
 
+func LogQuery(q string, args []any, err error) (string, trace.EventOption) {
+	var attrs []attribute.KeyValue
+	for k, v := range args {
+		var attr attribute.KeyValue
+		switch v:=v.(type) {
+		case int64:
+			attr = attribute.Int64(
+				fmt.Sprintf("$%d", k),
+				v,
+			)
+		case string:
+			attr = attribute.String(
+				fmt.Sprintf("$%d", k),
+				v,
+			)
+		default:
+			attr = attribute.String(
+				fmt.Sprintf("$%d", k),
+				fmt.Sprint(v),
+			)
+		}
+
+		attrs = append(attrs, attr)
+	}
+	
+	return q, trace.WithAttributes(attrs...)
+}
+
 func (w wrapSpan) AddEvent(name string, options ...trace.EventOption) {
 	w.Span.AddEvent(name, options...)
 
 	cfg := trace.NewEventConfig(options...)
 
 	attrs := cfg.Attributes()
-	args := make([]any, len(attrs)*2)
+	args := make([]any, len(attrs))
 
 	for i, a := range attrs {
-		args[2*i] = a.Key
+		switch a.Value.Type() {
-		args[2*i+1] = a.Value
+		case attribute.BOOL:
+			args[i] = slog.Bool(string(a.Key), a.Value.AsBool())
+		case attribute.INT64:
+			args[i] = slog.Int64(string(a.Key), a.Value.AsInt64())
+		case attribute.FLOAT64:
+			args[i] = slog.Float64(string(a.Key), a.Value.AsFloat64())
+		case attribute.STRING:
+			args[i] = slog.String(string(a.Key), a.Value.AsString())
+		default:
+			args[i] = slog.Any(string(a.Key), a.Value.AsInterface())
+		}
+		
 	}
 
 	slog.Debug(name, args...)

libsql_embed/open.go

@@ -0,0 +1,120 @@
+package libsqlembed
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"fmt"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/tursodatabase/go-libsql"
+)
+
+func init() {
+	sql.Register("libsql+embed", &db{})
+}
+
+type db struct {
+	conns map[string]connector
+	mu    sync.RWMutex
+}
+
+type connector struct {
+	*libsql.Connector
+	dsn    string
+	dir    string
+	driver *db
+}
+
+func (c *connector) Close() error {
+	c.driver.mu.Lock()
+	delete(c.driver.conns, c.dsn)
+	c.driver.mu.Unlock()
+
+	defer os.RemoveAll(c.dir)
+
+	if err := c.Connector.Sync(); err != nil {
+		return fmt.Errorf("syncing database: %w", err)
+	}
+
+	return c.Connector.Close()
+}
+
+func (db *db) OpenConnector(dsn string) (driver.Connector, error) {
+	if c, ok := func() (connector, bool) {
+		db.mu.RLock()
+		defer db.mu.RUnlock()
+		c, ok := db.conns[dsn]
+		return c, ok
+	}(); ok {
+		return c, nil
+	}
+
+	db.mu.Lock()
+	defer db.mu.Unlock()
+
+	u, err := url.Parse(dsn)
+	if err != nil {
+		return nil, err
+	}
+
+	var primary url.URL
+	primary.Scheme = strings.TrimSuffix(u.Scheme, "+embed")
+	primary.Host = u.Host
+
+	dbname, _, _ := strings.Cut(u.Host, ".")
+
+	authToken := u.Query().Get("authToken")
+	if authToken == "" {
+		return nil, fmt.Errorf("missing authToken")
+	}
+
+	opts := []libsql.Option{
+		libsql.WithAuthToken(authToken),
+	}
+
+	if refresh, err := strconv.ParseInt(u.Query().Get("refresh"),10,64); err == nil {
+		opts = append(opts, libsql.WithSyncInterval(time.Duration(refresh)*time.Minute))
+	}
+
+	if readWrite, err := strconv.ParseBool(u.Query().Get("readYourWrites")); err == nil {
+		opts = append(opts, libsql.WithReadYourWrites(readWrite))
+	}
+	if key := u.Query().Get("key"); key != "" {
+		opts = append(opts, libsql.WithEncryption(key))
+	}
+	
+	dir, err := os.MkdirTemp("", "libsql-*")
+	if err != nil {
+		return nil, fmt.Errorf("creating temporary directory: %w", err)
+	}
+
+	dbPath := filepath.Join(dir, dbname)
+
+	c, err := libsql.NewEmbeddedReplicaConnector(
+		dbPath,
+		primary.String(),
+		opts...)
+	if err != nil {
+		return nil, fmt.Errorf("creating connector: %w", err)
+	}
+
+	connector := connector{c, dsn, dir, db}
+	db.conns[dsn] = connector
+
+	return connector, nil
+}
+
+func (db *db) Open(dsn string) (driver.Conn, error) {
+	c, err := db.OpenConnector(dsn)
+	if err != nil {
+		return nil, err
+	}
+	return c.Connect(context.Background())
+}

mercury/app/app_test.go

@@ -0,0 +1,157 @@
+package app
+
+import (
+	"context"
+	"reflect"
+	"testing"
+
+	"go.sour.is/pkg/mercury"
+	"go.sour.is/pkg/ident"
+)
+
+type mockUser struct {
+	roles  map[string]struct{}
+	ident.SessionInfo
+}
+
+func (m *mockUser) Identity() string { return "user" }
+func (m *mockUser) HasRole(roles ...string) bool {
+	var found bool
+	for _, role := range roles {
+		if _, ok := m.roles[role]; ok {
+			found = true
+		}
+	}
+
+	return found
+}
+
+func Test_appConfig_GetRules(t *testing.T) {
+	type args struct {
+		u ident.Ident
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantLis mercury.Rules
+	}{
+		{"normal", args{&mockUser{}}, nil},
+		{
+			"admin",
+			args{
+				&mockUser{
+					SessionInfo: ident.SessionInfo{Active: true},
+					roles:  map[string]struct{}{"admin": {}},
+				},
+			},
+			mercury.Rules{
+				mercury.Rule{
+					Role:  "read",
+					Type:  "NS",
+					Match: "mercury.source.*",
+				},
+				mercury.Rule{
+					Role:  "read",
+					Type:  "NS",
+					Match: "mercury.priority",
+				},
+				mercury.Rule{
+					Role:  "read",
+					Type:  "NS",
+					Match: "mercury.host",
+				},
+				mercury.Rule{
+					Role:  "read",
+					Type:  "NS",
+					Match: "mercury.environ",
+				},
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			a := mercuryEnviron{}
+			if gotLis, _ := a.GetRules(context.TODO(), tt.args.u); !reflect.DeepEqual(gotLis, tt.wantLis) {
+				t.Errorf("appConfig.GetRules() = %v, want %v", gotLis, tt.wantLis)
+			}
+		})
+	}
+}
+
+// func Test_appConfig_GetIndex(t *testing.T) {
+// 	type args struct {
+// 		search mercury.NamespaceSearch
+// 		in1    *rsql.Program
+// 	}
+// 	tests := []struct {
+// 		name    string
+// 		args    args
+// 		wantLis mercury.Config
+// 	}{
+// 		{"nil", args{
+// 			nil,
+// 			nil,
+// 		}, nil},
+
+// 		{"app.settings", args{
+// 			mercury.ParseNamespace("app.settings"),
+// 			nil,
+// 		}, mercury.Config{&mercury.Space{Space: "app.settings"}}},
+// 	}
+// 	for _, tt := range tests {
+// 		t.Run(tt.name, func(t *testing.T) {
+// 			a := mercuryEnviron{}
+// 			if gotLis, _ := a.GetIndex(tt.args.search, tt.args.in1); !reflect.DeepEqual(gotLis, tt.wantLis) {
+// 				t.Errorf("appConfig.GetIndex() = %#v, want %#v", gotLis, tt.wantLis)
+// 			}
+// 		})
+// 	}
+// }
+
+// func Test_appConfig_GetObjects(t *testing.T) {
+// 	cfg, err := mercury.ParseText(strings.NewReader(`
+// @mercury.source.mercury-settings.default
+// match :0 *
+// 	`))
+
+// 	type args struct {
+// 		search mercury.NamespaceSearch
+// 		in1    *rsql.Program
+// 		in2    []string
+// 	}
+// 	tests := []struct {
+// 		name    string
+// 		args    args
+// 		wantLis mercury.Config
+// 	}{
+// 		{"nil", args{
+// 			nil,
+// 			nil,
+// 			nil,
+// 		}, nil},
+
+// 		{"app.settings", args{
+// 			mercury.ParseNamespace("app.settings"),
+// 			nil,
+// 			nil,
+// 		}, mercury.Config{
+// 			&mercury.Space{
+// 				Space: "app.settings",
+// 				List: []mercury.Value{{
+// 					Space: "app.settings",
+// 					Name: "app.setting",
+// 					Values: []string{"TRUE"}},
+// 				},
+// 			},
+// 		}},
+// 	}
+// 	for _, tt := range tests {
+// 		cfg, err :=
+// 		t.Run(tt.name, func(t *testing.T) {
+// 			a := appConfig{cfg: }
+// 			if gotLis, _ := a.GetConfig(tt.args.search, tt.args.in1, tt.args.in2); !reflect.DeepEqual(gotLis, tt.wantLis) {
+// 				t.Errorf("appConfig.GetIndex() = %#v, want %#v", gotLis, tt.wantLis)
+// 			}
+// 		})
+// 	}
+// }

mercury/app/default-rules.go

@@ -0,0 +1,98 @@
+package app
+
+import (
+	"context"
+	"strings"
+
+	"go.sour.is/pkg/mercury"
+	"go.sour.is/pkg/ident"
+)
+
+type mercuryDefault struct {
+	name string
+	cfg mercury.SpaceMap
+}
+
+var (
+	_ mercury.GetRules = (*mercuryDefault)(nil)
+
+	_ mercury.GetIndex  = (*mercuryEnviron)(nil)
+	_ mercury.GetConfig = (*mercuryEnviron)(nil)
+	_ mercury.GetRules  = (*mercuryEnviron)(nil)
+)
+
+// GetRules returns default rules for user role.
+func (app *mercuryDefault) GetRules(ctx context.Context, id ident.Ident) (lis mercury.Rules, err error) {
+	identity := id.Identity()
+
+	lis = append(lis,
+		mercury.Rule{
+			Role:  "write",
+			Type:  "NS",
+			Match: "mercury.@" + identity,
+		},
+		mercury.Rule{
+			Role:  "write",
+			Type:  "NS",
+			Match: "mercury.@" + identity + ".*",
+		},
+	)
+
+	groups := groups(identity, &app.cfg)
+
+	if s, ok := app.cfg.Space("mercury.policy."+app.name); ok {
+		for _, p := range s.List {
+			if groups.Has(p.Name) {
+				for _, r := range p.Values {
+					fds := strings.Fields(r)
+					if len(fds) < 3 {
+						continue
+					}
+					lis = append(lis, mercury.Rule{
+						Role:  fds[0],
+						Type:  fds[1],
+						Match: fds[2],
+					})
+				}
+			}
+		}
+	}
+
+	if u, ok := id.(hasRole); groups.Has("admin") || ok && u.HasRole("admin") {
+		lis = append(lis,
+			mercury.Rule{
+				Role:  "admin",
+				Type:  "NS",
+				Match: "*",
+			},
+			mercury.Rule{
+				Role:  "write",
+				Type:  "NS",
+				Match: "*",
+			},
+			mercury.Rule{
+				Role:  "admin",
+				Type:  "GR",
+				Match: "*",
+			},
+		)
+	} else if u.HasRole("write") {
+		lis = append(lis,
+			mercury.Rule{
+				Role:  "write",
+				Type:  "NS",
+				Match: "*",
+			},
+		)
+	} else if u.HasRole("read") {
+		lis = append(lis,
+			mercury.Rule{
+				Role:  "read",
+				Type:  "NS",
+				Match: "*",
+			},
+		)
+	}
+
+	return lis, nil
+}

mercury/app/environ.go

@@ -0,0 +1,288 @@
+package app
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/user"
+	"sort"
+	"strings"
+
+	"go.sour.is/pkg/mercury"
+	"go.sour.is/pkg/ident"
+	"go.sour.is/pkg/rsql"
+	"go.sour.is/pkg/set"
+)
+
+const (
+	mercurySource   = "mercury.source.*"
+	mercuryPriority = "mercury.priority"
+	mercuryHost     = "mercury.host"
+	appDotEnviron   = "mercury.environ"
+)
+var (
+	mercuryPolicy   = func(id string) string { return "mercury.@" + id + ".policy" }
+)
+
+func Register(name string, cfg mercury.SpaceMap) {
+	for _, c := range cfg {
+		c.Tags = append(c.Tags, "RO")
+	}
+	mercury.Registry.Register("mercury-default", func(s *mercury.Space) any { return &mercuryDefault{name: name, cfg: cfg} })
+	mercury.Registry.Register("mercury-environ", func(s *mercury.Space) any { return &mercuryEnviron{cfg: cfg, lookup: mercury.Registry.GetRules} })
+}
+
+type hasRole interface {
+	HasRole(r ...string) bool
+}
+
+type mercuryEnviron struct {
+	cfg    mercury.SpaceMap
+	lookup func(context.Context, ident.Ident) (mercury.Rules, error)
+}
+
+// Index returns nil
+func (app *mercuryEnviron) GetIndex(ctx context.Context, search mercury.NamespaceSearch, _ *rsql.Program) (lis mercury.Config, err error) {
+
+	if search.Match(mercurySource) {
+		for _, s := range app.cfg.ToArray() {
+			if search.Match(s.Space) {
+				lis = append(lis, &mercury.Space{Space: s.Space, Tags: []string{"RO"}})
+			}
+		}
+	}
+
+	if search.Match(mercuryPriority) {
+		lis = append(lis, &mercury.Space{Space: mercuryPriority, Tags: []string{"RO"}})
+	}
+
+	if search.Match(mercuryHost) {
+		lis = append(lis, &mercury.Space{Space: mercuryHost, Tags: []string{"RO"}})
+	}
+
+	if search.Match(appDotEnviron) {
+		lis = append(lis, &mercury.Space{Space: appDotEnviron, Tags: []string{"RO"}})
+	}
+	if id := ident.FromContext(ctx); id != nil {
+		identity := id.Identity()
+		match := mercuryPolicy(identity)
+		if search.Match(match) {
+			lis = append(lis, &mercury.Space{Space: match, Tags: []string{"RO"}})
+		}
+	}
+	return
+}
+
+// Objects returns nil
+func (app *mercuryEnviron) GetConfig(ctx context.Context, search mercury.NamespaceSearch, _ *rsql.Program, _ []string) (lis mercury.Config, err error) {
+	if search.Match(mercurySource) {
+		for _, s := range app.cfg.ToArray() {
+			if search.Match(s.Space) {
+				lis = append(lis, s)
+			}
+		}
+	}
+
+	if search.Match(mercuryPriority) {
+		space := mercury.Space{
+			Space: mercuryPriority,
+			Tags:  []string{"RO"},
+		}
+
+		// for i, key := range mercury.Registry {
+		// 	space.List = append(space.List, mercury.Value{
+		// 		Space:  appDotPriority,
+		// 		Seq:    uint64(i),
+		// 		Name:   key.Match,
+		// 		Values: []string{fmt.Sprint(key.Priority)},
+		// 	})
+		// }
+
+		lis = append(lis, &space)
+	}
+
+	if search.Match(mercuryHost) {
+		if usr, err := user.Current(); err == nil {
+			space := mercury.Space{
+				Space: mercuryHost,
+				Tags:  []string{"RO"},
+			}
+
+			hostname, _ := os.Hostname()
+			wd, _ := os.Getwd()
+			grp, _ := usr.GroupIds()
+			space.List = []mercury.Value{
+				{
+					Space:  mercuryHost,
+					Seq:    1,
+					Name:   "hostname",
+					Values: []string{hostname},
+				},
+				{
+					Space:  mercuryHost,
+					Seq:    2,
+					Name:   "username",
+					Values: []string{usr.Username},
+				},
+				{
+					Space:  mercuryHost,
+					Seq:    3,
+					Name:   "uid",
+					Values: []string{usr.Uid},
+				},
+				{
+					Space:  mercuryHost,
+					Seq:    4,
+					Name:   "gid",
+					Values: []string{usr.Gid},
+				},
+				{
+					Space:  mercuryHost,
+					Seq:    5,
+					Name:   "display",
+					Values: []string{usr.Name},
+				},
+				{
+					Space:  mercuryHost,
+					Seq:    6,
+					Name:   "home",
+					Values: []string{usr.HomeDir},
+				},
+				{
+					Space:  mercuryHost,
+					Seq:    7,
+					Name:   "groups",
+					Values: grp,
+				},
+				{
+					Space:  mercuryHost,
+					Seq:    8,
+					Name:   "pid",
+					Values: []string{fmt.Sprintf("%v", os.Getpid())},
+				},
+				{
+					Space:  mercuryHost,
+					Seq:    9,
+					Name:   "wd",
+					Values: []string{wd},
+				},
+			}
+
+			lis = append(lis, &space)
+		}
+	}
+
+	if search.Match(appDotEnviron) {
+		env := os.Environ()
+		space := mercury.Space{
+			Space: appDotEnviron,
+			Tags:  []string{"RO"},
+		}
+
+		sort.Strings(env)
+		for i, s := range env {
+			key, val, _ := strings.Cut(s, "=")
+
+			vals := []string{val}
+			if strings.Contains(key, "PATH") || strings.Contains(key, "XDG") {
+				vals = strings.Split(val, ":")
+			}
+
+			space.List = append(space.List, mercury.Value{
+				Space:  appDotEnviron,
+				Seq:    uint64(i),
+				Name:   key,
+				Values: vals,
+			})
+		}
+		lis = append(lis, &space)
+	}
+
+	if id := ident.FromContext(ctx); id != nil {
+		identity := id.Identity()
+		groups := groups(identity, &app.cfg)
+		match := mercuryPolicy(identity)
+		if search.Match(match) {
+			space := &mercury.Space{
+				Space: match,
+				Tags:  []string{"RO"},
+			}
+
+			lis = append(lis, space)
+			rules, err := app.lookup(ctx, id)
+			if err != nil {
+				space.AddNotes(err.Error())
+			} else {
+				k := mercury.NewValue("groups")
+				k.AddValues(strings.Join(groups.Values(), " "))
+				space.AddKeys(k)
+
+				k = mercury.NewValue("rules")
+				for _, r := range rules {
+					k.AddValues(strings.Join([]string{r.Role, r.Type, r.Match}, " "))
+				}
+				space.AddKeys(k)
+			}
+		}
+	}
+
+	return
+}
+
+// Rules returns nil
+func (app *mercuryEnviron) GetRules(ctx context.Context, id ident.Ident) (lis mercury.Rules, err error) {
+	identity := id.Identity()
+
+	lis = append(lis,
+		mercury.Rule{
+			Role:  "read",
+			Type:  "NS",
+			Match: mercuryPolicy(identity),
+		},
+	)
+
+	groups := groups(identity, &app.cfg)
+
+	if u, ok := id.(hasRole); groups.Has("admin") || ok && u.HasRole("admin") {
+		lis = append(lis,
+			mercury.Rule{
+				Role:  "read",
+				Type:  "NS",
+				Match: mercurySource,
+			},
+			mercury.Rule{
+				Role:  "read",
+				Type:  "NS",
+				Match: mercuryPriority,
+			},
+			mercury.Rule{
+				Role:  "read",
+				Type:  "NS",
+				Match: mercuryHost,
+			},
+			mercury.Rule{
+				Role:  "read",
+				Type:  "NS",
+				Match: appDotEnviron,
+			},
+		)
+	}
+
+	return lis, nil
+}
+
+func groups(identity string, cfg *mercury.SpaceMap) set.Set[string] {
+	groups := set.New[string]()
+	if s, ok := cfg.Space("mercury.groups"); ok {
+		for _, g := range s.List {
+			for _, v := range g.Values {
+				for _, u := range strings.Fields(v) {
+					if u == identity {
+						groups.Add(g.Name)
+					}
+				}
+			}
+		}
+	}
+	return groups
+}

mercury/http/notify.go

@@ -0,0 +1,63 @@
+package http
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"fmt"
+	"net/http"
+
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/mercury"
+)
+
+type httpNotify struct{}
+
+func (httpNotify) SendNotify(ctx context.Context, n mercury.Notify) error {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	cl := &http.Client{}
+	caCertPool, err := x509.SystemCertPool()
+	if err != nil {
+		caCertPool = x509.NewCertPool()
+	}
+
+	// Setup HTTPS client
+	tlsConfig := &tls.Config{
+		RootCAs: caCertPool,
+	}
+
+	transport := &http.Transport{TLSClientConfig: tlsConfig}
+
+	cl.Transport = transport
+
+	var req *http.Request
+	req, err = http.NewRequestWithContext(ctx, n.Method, n.URL, bytes.NewBufferString(""))
+	if err != nil {
+		span.RecordError(err)
+		return err
+	}
+	req.Header.Set("content-type", "application/json")
+
+	span.AddEvent(fmt.Sprint("URL: ", n.URL))
+	res, err := cl.Do(req)
+	if err != nil {
+		span.RecordError(err)
+		return err
+	}
+	res.Body.Close()
+	span.AddEvent(fmt.Sprint(res.Status))
+	if res.StatusCode != 200 {
+		span.RecordError(err)
+		err = fmt.Errorf("unable to read config")
+		return err
+	}
+
+	return nil
+}
+
+func Register() {
+	mercury.Registry.Register("http-notify", func(s *mercury.Space) any { return httpNotify{} })
+}

mercury/mercury.go

@@ -0,0 +1,727 @@
+package mercury
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	"golang.org/x/exp/maps"
+)
+
+type Config []*Space
+
+func NewConfig(spaces ...*Space) Config {
+	return spaces
+}
+func (c *Config) AddSpace(spaces ...*Space) *Config {
+	*c = append(*c, spaces...)
+	return c
+}
+
+// Len implements Len for sort.interface
+func (lis Config) Len() int {
+	return len(lis)
+}
+
+// Less implements Less for sort.interface
+func (lis Config) Less(i, j int) bool {
+	return lis[i].Space < lis[j].Space
+}
+
+// Swap implements Swap for sort.interface
+func (lis Config) Swap(i, j int) { lis[i], lis[j] = lis[j], lis[i] }
+
+// StringList returns the space names as a list
+func (lis Config) StringList() string {
+	var buf strings.Builder
+	for _, o := range lis {
+		if len(o.Notes) > 0 {
+			buf.WriteString("# ")
+			buf.WriteString(strings.Join(o.Notes, "\n# "))
+			buf.WriteRune('\n')
+		}
+		buf.WriteRune('@')
+		buf.WriteString(o.Space)
+		if len(o.Tags) > 0 {
+			buf.WriteRune(' ')
+			buf.WriteString(strings.Join(o.Tags, " "))
+		}
+		buf.WriteRune('\n')
+	}
+	return buf.String()
+}
+
+// ToSpaceMap formats as SpaceMap
+func (lis Config) ToSpaceMap() SpaceMap {
+	out := make(SpaceMap)
+	for _, c := range lis {
+		out[c.Space] = c
+	}
+	return out
+}
+
+// String format config as string
+func (lis Config) String() string {
+
+	var buf strings.Builder
+	for i, o := range lis {
+		attLen := 0
+		tagLen := 0
+
+		if i > 0 {
+			buf.WriteRune('\n')
+		}
+
+		for _, v := range o.List {
+			l := len(v.Name)
+			if attLen <= l {
+				attLen = l
+			}
+
+			t := len(strings.Join(v.Tags, " "))
+			if tagLen <= t {
+				tagLen = t
+			}
+		}
+
+		if len(o.Notes) > 0 {
+			buf.WriteString("# ")
+			buf.WriteString(strings.Join(o.Notes, "\n# "))
+			buf.WriteRune('\n')
+		}
+
+		buf.WriteRune('@')
+		buf.WriteString(o.Space)
+		if len(o.Tags) > 0 {
+			buf.WriteRune(' ')
+			buf.WriteString(strings.Join(o.Tags, " "))
+		}
+		buf.WriteRune('\n')
+
+		for _, v := range o.List {
+			if len(v.Notes) > 0 {
+				buf.WriteString("# ")
+				buf.WriteString(strings.Join(v.Notes, "\n# "))
+				buf.WriteString("\n")
+			}
+
+			buf.WriteString(v.Name)
+			buf.WriteString(strings.Repeat(" ", attLen-len(v.Name)+1))
+
+			if len(v.Tags) > 0 {
+				t := strings.Join(v.Tags, " ")
+				buf.WriteString(t)
+				buf.WriteString(strings.Repeat(" ", tagLen-len(t)+1))
+			} else {
+				buf.WriteString(strings.Repeat(" ", tagLen+1))
+			}
+
+			switch len(v.Values) {
+			case 0:
+				buf.WriteString("\n")
+			case 1:
+				buf.WriteString(" :")
+				buf.WriteString(v.Values[0])
+				buf.WriteString("\n")
+			default:
+				buf.WriteString(" :")
+				buf.WriteString(v.Values[0])
+				buf.WriteString("\n")
+				for _, s := range v.Values[1:] {
+					buf.WriteString(strings.Repeat(" ", attLen+tagLen+3))
+					buf.WriteString(":")
+					buf.WriteString(s)
+					buf.WriteString("\n")
+				}
+			}
+		}
+
+		for _, line := range o.Trailer {
+			buf.WriteString(line)
+			buf.WriteRune('\n')
+		}
+	}
+
+	return buf.String()
+}
+
+// EnvString format config as environ
+func (lis Config) EnvString() string {
+	var buf strings.Builder
+	for _, o := range lis {
+		for _, v := range o.List {
+			buf.WriteString(o.Space)
+			for _, t := range o.Tags {
+				buf.WriteRune(' ')
+				buf.WriteString(t)
+			}
+			buf.WriteRune(':')
+			buf.WriteString(v.Name)
+			for _, t := range v.Tags {
+				buf.WriteRune(' ')
+				buf.WriteString(t)
+			}
+			switch len(v.Values) {
+			case 0:
+				buf.WriteRune('=')
+				buf.WriteRune('\n')
+			case 1:
+				buf.WriteRune('=')
+				buf.WriteString(v.Values[0])
+				buf.WriteRune('\n')
+			default:
+				buf.WriteRune('+')
+				buf.WriteRune('=')
+				buf.WriteString(v.Values[0])
+				buf.WriteRune('\n')
+				for _, s := range v.Values[1:] {
+					buf.WriteString(o.Space)
+					buf.WriteRune(':')
+					buf.WriteString(v.Name)
+					buf.WriteRune('+')
+					buf.WriteRune('=')
+					buf.WriteString(s)
+					buf.WriteRune('\n')
+				}
+			}
+		}
+	}
+
+	return buf.String()
+}
+
+// INIString format config as ini
+func (lis Config) INIString() string {
+	var buf strings.Builder
+	for _, o := range lis {
+		for _, note := range o.Notes {
+			buf.WriteString("; ")
+			buf.WriteString(note)
+			buf.WriteRune('\n')
+		}
+		buf.WriteRune('[')
+		buf.WriteString(o.Space)
+		buf.WriteRune(']')
+		buf.WriteRune('\n')
+		for _, v := range o.List {
+			for _, note := range v.Notes {
+				buf.WriteString("; ")
+				buf.WriteString(note)
+				buf.WriteRune('\n')
+			}
+			buf.WriteString(v.Name)
+			switch len(v.Values) {
+			case 0:
+				buf.WriteRune('=')
+				buf.WriteRune('\n')
+			case 1:
+				buf.WriteRune('=')
+				buf.WriteString(v.Values[0])
+				buf.WriteRune('\n')
+			default:
+				buf.WriteRune('[')
+				buf.WriteRune('0')
+				buf.WriteRune(']')
+
+				buf.WriteRune('=')
+				buf.WriteString(v.Values[0])
+				buf.WriteRune('\n')
+				for i, s := range v.Values[1:] {
+					buf.WriteString(v.Name)
+					buf.WriteRune('[')
+					buf.WriteString(fmt.Sprintf("%d", i))
+					buf.WriteRune(']')
+					buf.WriteRune('=')
+					buf.WriteString(s)
+					buf.WriteRune('\n')
+				}
+			}
+		}
+		for _, line := range o.Trailer {
+			buf.WriteString("; ")
+			buf.WriteString(line)
+			buf.WriteRune('\n')
+		}
+
+		buf.WriteRune('\n')
+	}
+
+	return buf.String()
+}
+
+// String format config as string
+func (lis Config) HTMLString() string {
+
+	var buf strings.Builder
+	for i, o := range lis {
+		attLen := 0
+		tagLen := 0
+
+		if i > 0 {
+			buf.WriteRune('\n')
+		}
+
+		for _, v := range o.List {
+			l := len(v.Name)
+			if attLen <= l {
+				attLen = l
+			}
+
+			t := len(strings.Join(v.Tags, " "))
+			if tagLen <= t {
+				tagLen = t
+			}
+		}
+
+		if len(o.Notes) > 0 {
+			buf.WriteString("<i>")
+			buf.WriteString("# ")
+			buf.WriteString(strings.Join(o.Notes, "\n# "))
+			buf.WriteString("</i>")
+			buf.WriteRune('\n')
+		}
+
+		buf.WriteString("<strong>")
+		buf.WriteRune('@')
+		buf.WriteString(o.Space)
+		buf.WriteString("</strong>")
+		if len(o.Tags) > 0 {
+			buf.WriteRune(' ')
+			buf.WriteString("<em>")
+			buf.WriteString(strings.Join(o.Tags, " "))
+			buf.WriteString("</em>")
+		}
+		buf.WriteRune('\n')
+
+		for _, v := range o.List {
+			if len(v.Notes) > 0 {
+				buf.WriteString("<i>")
+				buf.WriteString("# ")
+				buf.WriteString(strings.Join(v.Notes, "\n# "))
+				buf.WriteString("</i>")
+				buf.WriteString("\n")
+			}
+
+			buf.WriteString("<dfn>")
+			buf.WriteString(v.Name)
+			buf.WriteString("</dfn>")
+			buf.WriteString(strings.Repeat(" ", attLen-len(v.Name)+1))
+
+			if len(v.Tags) > 0 {
+				t := strings.Join(v.Tags, " ")
+				buf.WriteString("<em>")
+				buf.WriteString(t)
+				buf.WriteString(strings.Repeat(" ", tagLen-len(t)+1))
+				buf.WriteString("</em>")
+			} else {
+				buf.WriteString(strings.Repeat(" ", tagLen+1))
+			}
+
+			switch len(v.Values) {
+			case 0:
+				buf.WriteString("\n")
+			case 1:
+				buf.WriteString(" :")
+				buf.WriteString(v.Values[0])
+				buf.WriteString("\n")
+			default:
+				buf.WriteString(" :")
+				buf.WriteString(v.Values[0])
+				buf.WriteString("\n")
+				for _, s := range v.Values[1:] {
+					buf.WriteString(strings.Repeat(" ", attLen+tagLen+3))
+					buf.WriteString(":")
+					buf.WriteString(s)
+					buf.WriteString("\n")
+				}
+			}
+		}
+
+		for _, line := range o.Trailer {
+			buf.WriteString("<small>")
+			buf.WriteString(line)
+			buf.WriteString("</small>")
+			buf.WriteRune('\n')
+		}
+	}
+
+	return buf.String()
+}
+
+// Space stores a registry of spaces
+type Space struct {
+	Space   string   `json:"space"`
+	Tags    []string `json:"tags,omitempty"`
+	Notes   []string `json:"notes,omitempty"`
+	List    []Value  `json:"list,omitempty"`
+	Trailer []string `json:"trailer,omitempty"`
+}
+
+func NewSpace(space string) *Space {
+	return &Space{Space: space}
+}
+
+// HasTag returns true if needle is found
+// If the needle ends with a / it will be treated
+// as a prefix for tag meta data.
+func (s *Space) HasTag(needle string) bool {
+	isPrefix := strings.HasSuffix(needle, "/")
+	for i := range s.Tags {
+		switch isPrefix {
+		case true:
+			if strings.HasPrefix(s.Tags[i], needle) {
+				return true
+			}
+		case false:
+			if s.Tags[i] == needle {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+// GetTagMeta retuns the value after a '/' in a tag.
+// Tags are in the format 'name' or 'name/value'
+// This function returns the value.
+func (s *Space) GetTagMeta(needle string, offset int) string {
+	if !strings.HasSuffix(needle, "/") {
+		needle += "/"
+	}
+
+	for i := range s.Tags {
+		if strings.HasPrefix(s.Tags[i], needle) {
+			if offset > 0 {
+				offset--
+				continue
+			}
+
+			return strings.TrimPrefix(s.Tags[i], needle)
+		}
+	}
+
+	return ""
+}
+
+// FirstTagMeta returns the first meta tag value.
+func (s *Space) FirstTagMeta(needle string) string {
+	return s.GetTagMeta(needle, 0)
+}
+
+// GetValues that match name
+func (s *Space) GetValues(name string) (lis []Value) {
+	for i := range s.List {
+		if s.List[i].Name == name {
+			lis = append(lis, s.List[i])
+		}
+	}
+	return
+}
+
+// FirstValue that matches name
+func (s *Space) FirstValue(name string) Value {
+	for i := range s.List {
+		if s.List[i].Name == name {
+			return s.List[i]
+		}
+	}
+	return Value{}
+}
+
+func (s *Space) SetTags(tags ...string) *Space {
+	s.Tags = tags
+	return s
+}
+func (s *Space) AddTags(tags ...string) *Space {
+	s.Tags = append(s.Tags, tags...)
+	return s
+}
+func (s *Space) SetNotes(notes ...string) *Space {
+	s.Notes = notes
+	return s
+}
+func (s *Space) AddNotes(notes ...string) *Space {
+	s.Notes = append(s.Notes, notes...)
+	return s
+}
+func (s *Space) SetKeys(keys ...*Value) *Space {
+	for i := range keys {
+		k := *keys[i]
+		k.Seq = uint64(i)
+		s.List = append(s.List, k)
+	}
+
+	return s
+}
+func (s *Space) AddKeys(keys ...*Value) *Space {
+	l := uint64(len(s.List))
+	for i := range keys {
+		k := *keys[i]
+		k.Seq = uint64(i) + l
+		s.List = append(s.List, k)
+	}
+	return s
+}
+
+// SpaceMap generic map of space values
+type SpaceMap map[string]*Space
+
+func (m SpaceMap) Space(name string) (*Space, bool) {
+	s, ok := m[name]
+	return s, ok
+}
+
+// Rule is a type of rule
+type Rule struct {
+	Role  string
+	Type  string
+	Match string
+}
+
+// Rules is a list of rules
+type Rules []Rule
+
+// GetNamespaceSearch returns a default search for users rules.
+func (r Rules) GetNamespaceSearch() (lis NamespaceSearch) {
+	for _, o := range r {
+		if o.Type == "NS" && (o.Role == "read" || o.Role == "write") {
+			lis = append(lis, NamespaceStar(o.Match))
+		}
+	}
+	return
+}
+
+// Check if name matches rule
+func (r Rule) Check(name string) bool {
+	ok, err := filepath.Match(r.Match, name)
+	if err != nil {
+		return false
+	}
+	return ok
+}
+
+// CheckNamespace verifies user has access
+func (r Rules) CheckNamespace(search NamespaceSearch) bool {
+	for _, ns := range search {
+		if !r.GetRoles("NS", ns.Value()).HasRole("read", "write") {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (r Rules) Less(i, j int) bool {
+	si, sj := scoreRule(r[i]), scoreRule(r[j])
+	if si != sj {
+		return si < sj
+	}
+	return len(r[i].Match) < len(r[j].Match)
+}
+func (r Rules) Swap(i, j int) { r[i], r[j] = r[j], r[i] }
+func (r Rules) Len() int      { return len(r) }
+
+func scoreRule(r Rule) int {
+	score := 0
+	if r.Type == "GR" {
+		score += 1000
+	}
+	switch r.Role {
+	case "admin":
+		score += 100
+	case "write":
+		score += 50
+	case "read":
+		score += 10
+	}
+	return score
+}
+
+// ReduceSearch verifies user has access
+func (r Rules) ReduceSearch(search NamespaceSearch) (out NamespaceSearch) {
+	rules := r.GetNamespaceSearch()
+	skip := make(map[string]struct{})
+	out = make(NamespaceSearch, 0, len(rules))
+
+	for _, rule := range rules {
+		if _, ok := skip[rule.Raw()]; ok {
+			continue
+		}
+		for _, ck := range search {
+			if _, ok := skip[ck.Raw()]; ok {
+				continue
+			} else if rule.Match(ck.Raw()) {
+				skip[ck.Raw()] = struct{}{}
+				out = append(out, ck)
+			} else if ck.Match(rule.Raw()) {
+				out = append(out, rule)
+			}
+		}
+	}
+
+	return
+}
+
+// Roles is a list of roles for a resource
+type Roles map[string]struct{}
+
+// GetRoles returns a list of Roles
+func (r Rules) GetRoles(typ, name string) (lis Roles) {
+	lis = make(Roles)
+	for _, o := range r {
+		if typ == o.Type && o.Check(name) {
+			lis[o.Role] = struct{}{}
+		}
+	}
+	return
+}
+
+// HasRole is a valid role
+func (r Roles) HasRole(roles ...string) bool {
+	for _, role := range roles {
+		if _, ok := r[role]; ok {
+			return true
+		}
+	}
+	return false
+}
+
+// ToArray converts SpaceMap to ArraySpace
+func (m SpaceMap) ToArray() Config {
+	a := make(Config, 0, len(m))
+	for _, s := range m {
+		a = append(a, s)
+	}
+	return a
+}
+func (m *SpaceMap) MergeMap(s SpaceMap) {
+	m.Merge(maps.Values(s)...)
+}
+func (m *SpaceMap) Merge(lis ...*Space) {
+	for _, s := range lis {
+		// Only accept first version based on priority.
+		if _, ok := (*m)[s.Space]; ok {
+			continue
+		}
+
+		(*m)[s.Space] = s
+
+		// // Merge values together.
+		// c, ok := (*m)[s.Space]
+		// if ok {
+		// 	c = &Space{}
+		// }
+		// c.Notes = append(c.Notes, s.Notes...)
+		// c.Tags = append(c.Tags, s.Tags...)
+		// last := c.List[len(c.List)-1].Seq
+		// for i := range s.List {
+		// 	v := s.List[i]
+		// 	v.Seq += last
+		// 	c.List = append(c.List, v)
+		// }
+		// (*m)[s.Space] = c
+	}
+}
+
+// Value stores the attributes for space values
+type Value struct {
+	Space  string   `json:"-" db:"space"`
+	Seq    uint64   `json:"-" db:"seq"`
+	Name   string   `json:"name"`
+	Values []string `json:"values"`
+	Notes  []string `json:"notes"`
+	Tags   []string `json:"tags"`
+}
+
+// func (v *Value) ID() string {
+// 	return gql.FmtID("MercurySpace:%v:%v", v.Space, v.Seq)
+// }
+
+// HasTag returns true if needle is found
+// If the needle ends with a / it will be treated
+// as a prefix for tag meta data.
+func (v Value) HasTag(needle string) bool {
+	isPrefix := strings.HasSuffix(needle, "/")
+	for i := range v.Tags {
+		switch isPrefix {
+		case true:
+			if strings.HasPrefix(v.Tags[i], needle) {
+				return true
+			}
+		case false:
+			if v.Tags[i] == needle {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+// GetTagMeta retuns the value after a '/' in a tag.
+// Tags are in the format 'name' or 'name/value'
+// This function returns the value.
+func (v Value) GetTagMeta(needle string, offset int) string {
+	if !strings.HasSuffix(needle, "/") {
+		needle += "/"
+	}
+
+	for i := range v.Tags {
+		if strings.HasPrefix(v.Tags[i], needle) {
+			if offset > 0 {
+				offset--
+				continue
+			}
+
+			return strings.TrimPrefix(v.Tags[i], needle)
+		}
+	}
+
+	return ""
+}
+
+// FirstTagMeta returns the first meta tag value.
+func (v Value) FirstTagMeta(needle string) string {
+	return v.GetTagMeta(needle, 0)
+}
+
+// First value in array.
+func (v Value) First() string {
+	if len(v.Values) < 1 {
+		return ""
+	}
+
+	return v.Values[0]
+}
+
+// Join values with newlines.
+func (v Value) Join() string {
+	return strings.Join(v.Values, "\n")
+}
+
+func NewValue(name string) *Value {
+	return &Value{Name: name}
+}
+func (v *Value) SetTags(tags ...string) *Value {
+	v.Tags = tags
+	return v
+}
+func (v *Value) AddTags(tags ...string) *Value {
+	v.Tags = append(v.Tags, tags...)
+	return v
+}
+func (v *Value) SetNotes(notes ...string) *Value {
+	v.Notes = notes
+	return v
+}
+func (v *Value) AddNotes(notes ...string) *Value {
+	v.Notes = append(v.Notes, notes...)
+	return v
+}
+func (v *Value) SetValues(values ...string) *Value {
+	v.Values = values
+	return v
+}
+func (v *Value) AddValues(values ...string) *Value {
+	v.Values = append(v.Values, values...)
+	return v
+}

mercury/mqtt/notify.go

@@ -0,0 +1,27 @@
+package mqtt
+
+import (
+	"context"
+
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/mercury"
+)
+
+type mqttNotify struct{}
+
+func (mqttNotify) SendNotify(ctx context.Context, n mercury.Notify) {
+	_, span := lg.Span(ctx)
+	defer span.End()
+	// var m mqtt.Message
+	// m, err = mqtt.NewMessage(n.URL, n)
+	// if err != nil {
+	// 	return
+	// }
+	// log.Debug(n)
+	// err = mqtt.Publish(m)
+	// return
+}
+
+func Register() {
+	mercury.Registry.Register("mqtt-notify", func(s *mercury.Space) any { return &mqttNotify{} })
+}

mercury/namespace.go

@@ -0,0 +1,119 @@
+package mercury
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+// NamespaceSpec implements a parsed namespace search
+type NamespaceSpec interface {
+	Value() string
+	String() string
+	Raw() string
+	Match(string) bool
+}
+
+// NamespaceSearch list of namespace specs
+type NamespaceSearch []NamespaceSpec
+
+// ParseNamespace returns a list of parsed values
+func ParseNamespace(ns string) (lis NamespaceSearch) {
+	for _, part := range strings.Split(ns, ";") {
+		if strings.HasPrefix(part, "trace:") {
+			lis = append(lis, NamespaceTrace(part[6:]))
+		} else if strings.Contains(part, "*") {
+			lis = append(lis, NamespaceStar(part))
+		} else {
+			lis = append(lis, NamespaceNode(part))
+		}
+	}
+
+	return
+}
+
+// String output string value
+func (n NamespaceSearch) String() string {
+	lis := make([]string, 0, len(n))
+
+	for _, v := range n {
+		lis = append(lis, v.String())
+	}
+	return strings.Join(lis, ";")
+}
+
+// Match returns true if any match.
+func (n NamespaceSearch) Match(s string) bool {
+	for _, m := range n {
+		ok, err := filepath.Match(m.Raw(), s)
+		if err != nil {
+			return false
+		}
+		if ok {
+			return true
+		}
+	}
+
+	return false
+}
+
+// NamespaceNode implements a node search value
+type NamespaceNode string
+
+// String output string value
+func (n NamespaceNode) String() string { return string(n) }
+
+// Quote return quoted value.
+// func (n NamespaceNode) Quote() string { return `'` + n.Value() + `'` }
+
+// Value to return the value
+func (n NamespaceNode) Value() string { return string(n) }
+
+// Raw return raw value.
+func (n NamespaceNode) Raw() string { return string(n) }
+
+// Match returns true if any match.
+func (n NamespaceNode) Match(s string) bool { return match(n, s) }
+
+// NamespaceTrace implements a trace search value
+type NamespaceTrace string
+
+// String output string value
+func (n NamespaceTrace) String() string { return "trace:" + string(n) }
+
+// Quote return quoted value.
+// func (n NamespaceTrace) Quote() string { return `'` + n.Value() + `'` }
+
+// Value to return the value
+func (n NamespaceTrace) Value() string { return strings.Replace(string(n), "*", "%", -1) }
+
+// Raw return raw value.
+func (n NamespaceTrace) Raw() string { return string(n) }
+
+// Match returns true if any match.
+func (n NamespaceTrace) Match(s string) bool { return match(n, s) }
+
+// NamespaceStar implements a trace search value
+type NamespaceStar string
+
+// String output string value
+func (n NamespaceStar) String() string { return string(n) }
+
+// Quote return quoted value.
+// func (n NamespaceStar) Quote() string { return `'` + n.Value() + `'` }
+
+// Value to return the value
+func (n NamespaceStar) Value() string { return strings.Replace(string(n), "*", "%", -1) }
+
+// Raw return raw value.
+func (n NamespaceStar) Raw() string { return string(n) }
+
+// Match returns true if any match.
+func (n NamespaceStar) Match(s string) bool { return match(n, s) }
+
+func match(n NamespaceSpec, s string) bool {
+	ok, err := filepath.Match(n.Raw(), s)
+	if err != nil {
+		return false
+	}
+	return ok
+}

mercury/namespace_test.go

@@ -0,0 +1,59 @@
+package mercury_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/matryer/is"
+	"go.sour.is/pkg/mercury"
+
+	sq "github.com/Masterminds/squirrel"
+)
+
+func TestNamespaceParse(t *testing.T) {
+	var tests = []struct {
+		in  string
+		out string
+		args []any
+	}{
+		{
+			in: "d42.bgp.kapha.*;trace:d42.bgp.kapha",
+			out: "(column LIKE ? OR ? LIKE column || '%')",
+			args: []any{"d42.bgp.kapha.%", "d42.bgp.kapha"},
+		},
+
+		{
+			in: "d42.bgp.kapha.*,d42.bgp.kapha",
+			out: "(column LIKE ? OR column = ?)",
+			args: []any{"d42.bgp.kapha.%", "d42.bgp.kapha"},
+		},
+	}
+
+	for i, tt := range tests {
+		t.Run(fmt.Sprintf("test %d", i), func(t *testing.T) {
+			is := is.New(t)
+			out := mercury.ParseNamespace(tt.in)
+			sql, args, err := getWhere(out).ToSql()
+			is.NoErr(err)
+			is.Equal(sql, tt.out)
+			is.Equal(args, tt.args)
+		})
+	}
+}
+
+func getWhere(search mercury.NamespaceSearch) sq.Sqlizer {
+	var where sq.Or
+	space := "column"
+	for _, m := range search {
+		switch m.(type) {
+		case mercury.NamespaceNode:
+			where = append(where, sq.Eq{space: m.Value()})
+		case mercury.NamespaceStar:
+			where = append(where, sq.Like{space: m.Value()})
+		case mercury.NamespaceTrace:
+			e := sq.Expr(`? LIKE `+space+` || '%'`, m.Value())
+			where = append(where, e)
+		}
+	}
+	return where
+}

mercury/parse.go

@@ -0,0 +1,127 @@
+package mercury
+
+import (
+	"bufio"
+	"io"
+	"log"
+	"strings"
+)
+
+func ParseText(body io.Reader) (config SpaceMap, err error) {
+	config = make(SpaceMap)
+
+	var space string
+	var name string
+	var tags []string
+	var notes []string
+	var seq uint64
+
+	scanner := bufio.NewScanner(body)
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		if len(line) == 0 {
+			continue
+		}
+
+		if strings.HasPrefix(line, "#") {
+			notes = append(notes, strings.TrimPrefix(line, "# "))
+			continue
+		}
+
+		if strings.HasPrefix(line, "@") {
+			var c *Space
+			var ok bool
+
+			sp := strings.Fields(strings.TrimPrefix(line, "@"))
+			space = sp[0]
+
+			if c, ok = config[space]; !ok {
+				c = &Space{Space: space}
+			}
+
+			c.Notes = append(make([]string, 0, len(notes)), notes...)
+			c.Tags = append(make([]string, 0, len(sp[1:])), sp[1:]...)
+
+			config[space] = c
+			notes = notes[:0]
+			tags = tags[:0]
+
+			continue
+		}
+
+		if strings.HasPrefix(line, "----") && strings.HasSuffix(line, "----") {
+			var trailer []string
+
+			trailer = append(trailer, line)
+			for scanner.Scan() {
+				line = scanner.Text()
+				trailer = append(trailer, line)
+				if strings.HasPrefix(line, "----") && strings.HasSuffix(line, "----") {
+					break
+				}
+			}
+			c, ok := config[space]
+			if !ok {
+				c = &Space{Space: space}
+			}
+			log.Println(trailer)
+			c.Trailer = append(c.Trailer, trailer...)
+			config[space] = c
+			continue
+		}
+		if space == "" {
+			continue
+		}
+
+		sp := strings.SplitN(line, ":", 2)
+		if len(sp) < 2 {
+			continue
+		}
+
+		if strings.TrimSpace(sp[0]) == "" {
+			c, ok := config[space]
+			if !ok {
+				c = &Space{Space: space}
+			}
+
+			c.List[len(c.List)-1].Values = append(c.List[len(c.List)-1].Values, sp[1])
+			config[space] = c
+
+			continue
+		}
+
+		fields := strings.Fields(sp[0])
+		name = fields[0]
+		if len(fields) > 1 {
+			tags = fields[1:]
+		}
+
+		c, ok := config[space]
+		if !ok {
+			c = &Space{Space: space}
+		}
+
+		seq++
+		c.List = append(
+			c.List,
+			Value{
+				Seq:    seq,
+				Name:   name,
+				Tags:   append(make([]string, 0, len(tags)), tags...),
+				Notes:  append(make([]string, 0, len(notes)), notes...),
+				Values: []string{sp[1]},
+			},
+		)
+		config[space] = c
+
+		notes = notes[:0]
+		tags = tags[:0]
+	}
+
+	if err = scanner.Err(); err != nil {
+		return nil, err
+	}
+
+	return
+}

mercury/parse_test.go

@@ -0,0 +1,28 @@
+package mercury_test
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/matryer/is"
+	"go.sour.is/pkg/mercury"
+)
+
+func TestParseText(t *testing.T) {
+	is := is.New(t)
+	sm, err := mercury.ParseText(strings.NewReader(`
+@test.sign
+key   :value1
+-----BEGIN SSH SIGNATURE-----
+U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgZ+OuJYdd3UiUbyBuO1RlsQR20a
+Qm5mKneuMxRjGo3zkAAAAEZmlsZQAAAAAAAAAGc2hhNTEyAAAAUwAAAAtzc2gtZWQyNTUx
+OQAAAED8T4C6WILXYZ1KxqDIlVhlrAEjr1Vc+tn8ypcVM3bN7iOexVvuUuvm90nr8eEwKU
+acrdDxmq2S+oysQbK+pMUE
+-----END SSH SIGNATURE-----
+`))
+	is.NoErr(err)
+	for _, c := range sm {
+		is.Equal(len(c.Trailer), 6)
+	}
+
+}

mercury/public/index.html

@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+    <title>☿ Mercury ☿</title>
+    <script src="https://unpkg.com/htmx.org@2.0.0-alpha1/dist/htmx.min.js"></script>
+
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/firacode@6.2.0/distr/fira_code.css" />
+    <link rel="stylesheet" href="/style.css" />
+</head>
+
+<body>
+    <header>
+        <nav style="position: absolute; top:0; right:50px" hx-trigger="load" hx-get="/ident"></nav>
+        <h1>☿ Mercury ☿</h1>
+    </header>
+
+    <div class="container">
+        <div>
+            <form class="search" hx-get="/api/v1/mercury/config" hx-target="#config-results"
+                hx-headers='{"Accept": "text/html"}''>
+                <div>@</div>
+                <input id="space-config" name="space" type="text" placeholder="Space...">
+                <button type="submit">Load</button>
+            </form>
+            <code tabindex="0"><pre id="config-results"></pre></code>
+        </div>
+
+        <div>
+            <form class="edit" hx-post="/api/v1/mercury/config" hx-target="#space-saved" hx-encoding="multipart/form-data">
+                <button type="submit">Save</button>
+                <br />
+                <textarea name="content" rows="45" wrap="off"
+                    onkeyup="if (this.scrollHeight > this.clientHeight) this.style.height = this.scrollHeight + ' px';"
+                style="overflow:auto; transition: height 0.2s ease-out;"></textarea>
+            </form>
+            <pre id="space-saved"></pre>
+        </div>
+    </div>
+
+    <footer>
+        sour.is 🅭2024
+        <span hx-trigger="load" hx-get="/api/v1/app-info"></span>
+    </footer>
+</body>
+
+</html>

mercury/public/style.css

@@ -0,0 +1,218 @@
+* {
+    font-weight: lighter;
+    font-family: 'fira code', monospace;
+}
+
+body {
+    margin: 0;
+    min-height: 100vh;
+    background: rgb(210, 221, 240);
+}
+
+header {
+    margin: 0 50px;
+    background: rgb(63, 94, 251);
+    background: radial-gradient(circle, rgba(63, 94, 251, 1) 0%, rgba(252, 70, 107, 1) 100%);
+    height: 100px;
+    user-select: none;
+}
+
+h1 {
+    text-align: center;
+    color: white;
+    line-height: 100px;
+    margin: 0;
+}
+
+input,
+textarea {
+    font-size: small;
+    border: 2px solid cornflowerblue;
+}
+
+input.invalid {
+    border-color: red;
+}
+
+button {
+    border: 2px solid cornflowerblue;
+}
+
+code,
+pre {
+    font-size: small;
+    -webkit-user-select: text;
+    user-select: text;
+}
+
+code strong {
+    font-weight: bold;
+}
+
+code dfn {
+    color: green
+}
+
+code i {
+    color: grey
+}
+
+code em {
+    color: orangered;
+}
+
+code small {
+    font-size-adjust: 50%;
+    color: orange;
+}
+
+code:focus {
+    animation: select 100ms step-end forwards;
+}
+
+footer {
+    position: fixed;
+    font-size: x-small;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    height: 1em;
+    padding: 4px;
+    color: white;
+    border-top: 1px solid black;
+    background: cornflowerblue;
+}
+
+footer>span {
+    float: right;
+}
+
+.container {
+    margin: 0 50px;
+    display: grid;
+    min-height: 100vh;
+}
+
+.container .open {
+    grid-template-columns: 1fr 1fr;
+}
+
+.container>div {
+    overflow: auto;
+    padding: 10px;
+    background-color: white;
+    border: 0px ;
+}
+
+.container>div>code {
+    -webkit-user-select: all;
+    /* for Safari */
+    user-select: all;
+}
+
+.search {
+    display: flex
+}
+
+.search>div {
+    background-color: lightgrey;
+    border-radius: 5px 0px 0px 5px;
+    border: 2px solid cornflowerblue;
+    border-right: 0;
+    user-select: none;
+    padding: 0 2px; 
+}
+
+.search>button {
+    border-left: 0;
+}
+
+.search>div {
+    line-height: 30px;
+}
+
+.search>input {
+    flex-grow: 5;
+}
+
+.search>button {
+    flex-grow: 2;
+    border-radius: 0px 5px 5px 0px;
+}
+
+.edit {
+    display: grid;
+    grid-template-columns: 1fr;
+}
+
+.edit>button {
+    line-height: 28px;
+    border-bottom: 0;
+    border-radius: 5px 5px 0 0;
+}
+
+.edit>textarea {
+    margin-top: 0;
+    border-radius: 0 0 5px 5px;
+}
+
+@keyframes select {
+    to {
+        -webkit-user-select: text;
+        user-select: text;
+    }
+}
+
+@media (prefers-color-scheme: dark) {
+    html, body {
+        color: white;
+        background: #111
+    }
+
+    header {
+        background: #111;
+        background: radial-gradient(circle, rgba(2, 0, 36, 1) 0%, rgba(7, 80, 29, 1) 35%, rgba(0, 0, 0, 1) 100%);
+    }
+
+    h1 {
+        color: white;
+    }
+
+    .container>div {
+        background: #111;
+        /* background: linear-gradient(304deg, rgba(2, 0, 36, 1) 0%, rgba(77, 77, 77, 1) 18%, rgba(0, 0, 0, 1) 100%); */
+        border: 2px solid rgb(117, 117, 117);
+    }
+
+    .search>div {
+        background-color: grey;
+        border-color: rgb(117, 117, 117);
+    }
+
+    button {
+        color: white;
+        background: rgba(7, 80, 29, 1);
+        border: 2px solid rgb(117, 117, 117);
+    }
+
+    button:hover {
+        background: rgb(11, 121, 44);
+    }
+
+    button:active {
+        background: rgb(5, 59, 21);
+    }
+
+    input,
+    textarea {
+        color: white;
+        background-color: #111;
+        border: 2px solid rgb(117, 117, 117);
+    }
+    footer {
+        color: white;
+        border-top: 1px solid white;
+        background: #222;
+
+    }
+}

mercury/registry.go

@@ -0,0 +1,416 @@
+package mercury
+
+import (
+	"context"
+	"fmt"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+
+	"go.sour.is/pkg/ident"
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/rsql"
+	"go.sour.is/pkg/set"
+	"golang.org/x/sync/errgroup"
+)
+
+type GetIndex interface {
+	GetIndex(context.Context, NamespaceSearch, *rsql.Program) (Config, error)
+}
+type GetConfig interface {
+	GetConfig(context.Context, NamespaceSearch, *rsql.Program, []string) (Config, error)
+}
+type WriteConfig interface {
+	WriteConfig(context.Context, Config) error
+}
+type GetRules interface {
+	GetRules(context.Context, ident.Ident) (Rules, error)
+}
+type GetNotify interface {
+	GetNotify(context.Context, string) (ListNotify, error)
+}
+type SendNotify interface {
+	SendNotify(context.Context, Notify) error
+}
+
+// type nobody struct{}
+
+// func (nobody) IsActive() bool           { return true }
+// func (nobody) Identity() string         { return "xuu" }
+// func (nobody) HasRole(r ...string) bool { return true }
+
+func (reg *registry) accessFilter(rules Rules, lis Config) (out Config, err error) {
+	accessList := make(map[string]struct{})
+	for _, o := range lis {
+		if _, ok := accessList[o.Space]; ok {
+			out = append(out, o)
+			continue
+		}
+
+		if role := rules.GetRoles("NS", o.Space); role.HasRole("read", "write") && !role.HasRole("deny") {
+			accessList[o.Space] = struct{}{}
+			out = append(out, o)
+		}
+	}
+
+	return
+}
+
+// HandlerItem a single handler matching
+type matcher[T any] struct {
+	Name     string
+	Match    NamespaceSearch
+	Priority int
+	Handler  T
+}
+type matchers struct {
+	getIndex    []matcher[GetIndex]
+	getConfig   []matcher[GetConfig]
+	writeConfig []matcher[WriteConfig]
+	getRules    []matcher[GetRules]
+	getNotify   []matcher[GetNotify]
+	sendNotify  []matcher[SendNotify]
+}
+
+// registry a list of handlers
+type registry struct {
+	handlers map[string]func(*Space) any
+	matchers matchers
+}
+
+func (m matcher[T]) String() string {
+	return fmt.Sprintf("%d: %s", m.Priority, m.Match)
+}
+
+// Registry handler
+var Registry *registry = &registry{}
+
+func (r registry) String() string {
+	var buf strings.Builder
+	for h := range r.handlers {
+		buf.WriteString(h)
+		buf.WriteRune('\n')
+	}
+
+	return buf.String()
+}
+
+func (r *registry) resetMatchers() {
+	r.matchers.getIndex = r.matchers.getIndex[:0]
+	r.matchers.getConfig = r.matchers.getConfig[:0]
+	r.matchers.writeConfig = r.matchers.writeConfig[:0]
+	r.matchers.getRules = r.matchers.getRules[:0]
+	r.matchers.getNotify = r.matchers.getNotify[:0]
+	r.matchers.sendNotify = r.matchers.sendNotify[:0]
+}
+func (r *registry) sortMatchers() {
+	sort.Slice(r.matchers.getConfig, func(i, j int) bool { return r.matchers.getConfig[i].Priority < r.matchers.getConfig[j].Priority })
+	sort.Slice(r.matchers.getIndex, func(i, j int) bool { return r.matchers.getIndex[i].Priority < r.matchers.getIndex[j].Priority })
+	sort.Slice(r.matchers.writeConfig, func(i, j int) bool { return r.matchers.writeConfig[i].Priority < r.matchers.writeConfig[j].Priority })
+	sort.Slice(r.matchers.getRules, func(i, j int) bool { return r.matchers.getRules[i].Priority < r.matchers.getRules[j].Priority })
+	sort.Slice(r.matchers.getNotify, func(i, j int) bool { return r.matchers.getNotify[i].Priority < r.matchers.getNotify[j].Priority })
+	sort.Slice(r.matchers.sendNotify, func(i, j int) bool { return r.matchers.sendNotify[i].Priority < r.matchers.sendNotify[j].Priority })
+}
+func (r *registry) Register(name string, h func(*Space) any) {
+	if r.handlers == nil {
+		r.handlers = make(map[string]func(*Space) any)
+	}
+	r.handlers[name] = h
+}
+
+func (r *registry) Configure(m SpaceMap) error {
+	r.resetMatchers()
+	for space, c := range m {
+		if strings.HasPrefix(space, "mercury.source.") {
+			space = strings.TrimPrefix(space, "mercury.source.")
+			handler, name, _ := strings.Cut(space, ".")
+			matches := c.FirstValue("match")
+			for _, match := range matches.Values {
+				ps := strings.Fields(match)
+				priority, err := strconv.Atoi(ps[0])
+				if err != nil {
+					return err
+				}
+				r.add(name, handler, ps[1], priority, c)
+			}
+		}
+
+		if strings.HasPrefix(space, "mercury.output.") {
+			space = strings.TrimPrefix(space, "mercury.output.")
+			handler, name, _ := strings.Cut(space, ".")
+			matches := c.FirstValue("match")
+			for _, match := range matches.Values {
+				ps := strings.Fields(match)
+				priority, err := strconv.Atoi(ps[0])
+				if err != nil {
+					return err
+				}
+				r.add(name, handler, ps[1], priority, c)
+			}
+		}
+	}
+
+	r.sortMatchers()
+	return nil
+}
+
+// Register add a handler to registry
+func (r *registry) add(name, handler, match string, priority int, cfg *Space) error {
+	// log.Infos("mercury regster", "match", match, "pri", priority)
+	mkHandler, ok := r.handlers[handler]
+	if !ok {
+		return fmt.Errorf("handler not registered: %s", handler)
+	}
+	hdlr := mkHandler(cfg)
+	if err, ok := hdlr.(error); ok {
+		return fmt.Errorf("%w: failed to config %s as handler: %s", err, name, handler)
+	}
+	if hdlr == nil {
+		return fmt.Errorf("failed to config %s as handler: %s", name, handler)
+	}
+
+	if hdlr, ok := hdlr.(GetIndex); ok {
+		r.matchers.getIndex = append(
+			r.matchers.getIndex,
+			matcher[GetIndex]{Name: name, Match: ParseNamespace(match), Priority: priority, Handler: hdlr},
+		)
+	}
+	if hdlr, ok := hdlr.(GetConfig); ok {
+		r.matchers.getConfig = append(
+			r.matchers.getConfig,
+			matcher[GetConfig]{Name: name, Match: ParseNamespace(match), Priority: priority, Handler: hdlr},
+		)
+	}
+
+	if hdlr, ok := hdlr.(WriteConfig); ok {
+
+		r.matchers.writeConfig = append(
+			r.matchers.writeConfig,
+			matcher[WriteConfig]{Name: name, Match: ParseNamespace(match), Priority: priority, Handler: hdlr},
+		)
+	}
+	if hdlr, ok := hdlr.(GetRules); ok {
+		r.matchers.getRules = append(
+			r.matchers.getRules,
+			matcher[GetRules]{Name: name, Match: ParseNamespace(match), Priority: priority, Handler: hdlr},
+		)
+	}
+	if hdlr, ok := hdlr.(GetNotify); ok {
+		r.matchers.getNotify = append(
+			r.matchers.getNotify,
+			matcher[GetNotify]{Name: name, Match: ParseNamespace(match), Priority: priority, Handler: hdlr},
+		)
+	}
+	if hdlr, ok := hdlr.(SendNotify); ok {
+		r.matchers.sendNotify = append(
+			r.matchers.sendNotify,
+			matcher[SendNotify]{Name: name, Match: ParseNamespace(match), Priority: priority, Handler: hdlr},
+		)
+	}
+
+	return nil
+}
+
+// GetIndex query each handler that match namespace.
+func (r *registry) GetIndex(ctx context.Context, match, search string) (c Config, err error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	spec := ParseNamespace(match)
+	pgm := rsql.DefaultParse(search)
+	matches := make([]NamespaceSearch, len(r.matchers.getIndex))
+
+	for _, n := range spec {
+		for i, hdlr := range r.matchers.getIndex {
+			if hdlr.Match.Match(n.Raw()) {
+				matches[i] = append(matches[i], n)
+			}
+		}
+	}
+
+	wg, ctx := errgroup.WithContext(ctx)
+	slots := make(chan Config, len(r.matchers.getConfig))
+	wg.Go(func() error {
+		i := 0
+		for lis := range slots {
+			c = append(c, lis...)
+			i++
+			if i > len(slots) {
+				break
+			}
+		}
+		return nil
+	})
+
+	for i, hdlr := range r.matchers.getIndex {
+		i, hdlr := i, hdlr
+
+		wg.Go(func() error {
+			span.AddEvent(fmt.Sprintf("INDEX %s %s", hdlr.Name, hdlr.Match))
+			lis, err := hdlr.Handler.GetIndex(ctx, matches[i], pgm)
+			slots <- lis
+			return err
+		})
+	}
+
+	err = wg.Wait()
+	if err != nil {
+		return nil, err
+	}
+
+	return
+}
+
+// Search query each handler with a key=value search
+
+// GetConfig query each handler that match for fully qualified namespaces.
+func (r *registry) GetConfig(ctx context.Context, match, search, fields string) (Config, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	spec := ParseNamespace(match)
+	pgm := rsql.DefaultParse(search)
+	flds := strings.Split(fields, ",")
+
+	matches := make([]NamespaceSearch, len(r.matchers.getConfig))
+
+	for _, n := range spec {
+		for i, hdlr := range r.matchers.getConfig {
+			if hdlr.Match.Match(n.Raw()) {
+				matches[i] = append(matches[i], n)
+			}
+		}
+	}
+
+	m := make(SpaceMap)
+	for i, hdlr := range r.matchers.getConfig {
+		if len(matches[i]) == 0 {
+			continue
+		}
+		span.AddEvent(fmt.Sprintf("QUERY %s %s", hdlr.Name, hdlr.Match))
+		lis, err := hdlr.Handler.GetConfig(ctx, matches[i], pgm, flds)
+		if err != nil {
+			return nil, err
+		}
+		m.Merge(lis...)
+	}
+
+	return m.ToArray(), nil
+}
+
+// WriteConfig write objects to backends
+func (r *registry) WriteConfig(ctx context.Context, spaces Config) error {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	matches := make([]Config, len(r.matchers.writeConfig))
+
+	for _, s := range spaces {
+		for i, hdlr := range r.matchers.writeConfig {
+			if hdlr.Match.Match(s.Space) {
+				matches[i] = append(matches[i], s)
+				break
+			}
+		}
+	}
+
+	for i, hdlr := range r.matchers.writeConfig {
+		if len(matches[i]) == 0 {
+			continue
+		}
+		span.AddEvent(fmt.Sprint("WRITE MATCH", hdlr.Name, hdlr.Match))
+		err := hdlr.Handler.WriteConfig(ctx, matches[i])
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// GetRules query each of the handlers for rules.
+func (r *registry) GetRules(ctx context.Context, user ident.Ident) (Rules, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	s := set.New[Rule]()
+	for _, hdlr := range r.matchers.getRules {
+		span.AddEvent(fmt.Sprint("RULES", hdlr.Name, hdlr.Match))
+		lis, err := hdlr.Handler.GetRules(ctx, user)
+		if err != nil {
+			return nil, err
+		}
+		s.Add(lis...)
+	}
+	var rules Rules = s.Values()
+	sort.Sort(rules)
+	return rules, nil
+}
+
+// GetNotify query each of the handlers for rules.
+func (r *registry) GetNotify(ctx context.Context, event string) (ListNotify, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	s := set.New[Notify]()
+	for _, hdlr := range r.matchers.getNotify {
+		span.AddEvent(fmt.Sprint("GET NOTIFY", hdlr.Name, hdlr.Match))
+
+		lis, err := hdlr.Handler.GetNotify(ctx, event)
+		if err != nil {
+			return nil, err
+		}
+		s.Add(lis...)
+	}
+
+	return s.Values(), nil
+}
+
+func (r *registry) SendNotify(ctx context.Context, n Notify) (err error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	for _, hdlr := range r.matchers.sendNotify {
+		span.AddEvent(fmt.Sprint("SEND NOTIFY", hdlr.Name, hdlr.Match))
+
+		err := hdlr.Handler.SendNotify(ctx, n)
+		if err != nil {
+			return err
+		}
+	}
+
+	return
+}
+
+// Check if name matches notify
+func (n Notify) Check(name string) bool {
+	ok, err := filepath.Match(n.Match, name)
+	if err != nil {
+		return false
+	}
+	return ok
+}
+
+// Notify stores the attributes for a registry space
+type Notify struct {
+	Name   string
+	Match  string
+	Event  string
+	Method string
+	URL    string
+}
+
+// ListNotify array of notify
+type ListNotify []Notify
+
+// Find returns list of notify that match name.
+func (ln ListNotify) Find(name string) (lis ListNotify) {
+	lis = make(ListNotify, 0, len(ln))
+	for _, o := range ln {
+		if o.Check(name) {
+			lis = append(lis, o)
+		}
+	}
+	return
+}

mercury/routes.go

@@ -0,0 +1,277 @@
+package mercury
+
+import (
+	"embed"
+	"encoding/json"
+	"fmt"
+	"io/fs"
+	"log"
+	"net/http"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/BurntSushi/toml"
+	"github.com/golang/gddo/httputil"
+	"go.sour.is/pkg/ident"
+	"go.sour.is/pkg/lg"
+)
+
+type root struct{}
+
+func NewHTTP() *root {
+	return &root{}
+}
+
+//go:embed public
+var public embed.FS
+
+func (s *root) RegisterHTTP(mux *http.ServeMux) {
+	// mux.Handle("/", http.FileServer(http.Dir("./mercury/public")))
+	public, _ := fs.Sub(public, "public")
+	mux.Handle("/", http.FileServerFS(public))
+}
+func (s *root) RegisterAPIv1(mux *http.ServeMux) {
+	mux.HandleFunc("GET /mercury", s.indexV1)
+	// mux.HandleFunc("/mercury/config", s.configV1)
+	mux.HandleFunc("GET /mercury/config", s.configV1)
+	mux.HandleFunc("POST /mercury/config", s.storeV1)
+}
+func (s *root) RegisterWellKnown(mux *http.ServeMux) {
+	s.RegisterAPIv1(mux)
+}
+
+func (s *root) configV1(w http.ResponseWriter, r *http.Request) {
+	if r.Method == http.MethodPost {
+		s.storeV1(w, r)
+		return
+	}
+
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	var id ident.Ident = ident.FromContext(ctx)
+
+	if !id.Session().Active {
+		span.RecordError(fmt.Errorf("NO_AUTH"))
+		http.Error(w, "NO_AUTH", http.StatusUnauthorized)
+		return
+	}
+
+	rules, err := Registry.GetRules(ctx, id)
+	if err != nil {
+		span.RecordError(err)
+		http.Error(w, "ERR: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+	space := r.URL.Query().Get("space")
+	if space == "" {
+		space = "*"
+	}
+
+	log.Print("SPC:  ", space)
+	ns := ParseNamespace(space)
+	log.Print("PRE:  ", ns)
+	//ns = rules.ReduceSearch(ns)
+	log.Print("POST: ", ns)
+
+	lis, err := Registry.GetConfig(ctx, ns.String(), "", "")
+	if err != nil {
+		http.Error(w, "ERR: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	lis, err = Registry.accessFilter(rules, lis)
+	if err != nil {
+		span.RecordError(err)
+		http.Error(w, "ERR: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	sort.Sort(lis)
+	var content string
+
+	switch httputil.NegotiateContentType(r, []string{
+		"text/plain",
+		"text/html",
+		"application/environ",
+		"application/ini",
+		"application/json",
+		"application/toml",
+	}, "text/plain") {
+	case "text/plain":
+		content = lis.String()
+	case "text/html":
+		content = lis.HTMLString()
+	case "application/environ":
+		content = lis.EnvString()
+	case "application/ini":
+		content = lis.INIString()
+	case "application/json":
+		json.NewEncoder(w).Encode(lis)
+	case "application/toml":
+		w.WriteHeader(200)
+		m := make(map[string]map[string][]string)
+		for _, o := range lis {
+			if _, ok := m[o.Space]; !ok {
+				m[o.Space] = make(map[string][]string)
+			}
+			for _, v := range o.List {
+				m[o.Space][v.Name] = append(m[o.Space][v.Name], v.Values...)
+			}
+		}
+		err := toml.NewEncoder(w).Encode(m)
+		if err != nil {
+			// log.Error(err)
+			http.Error(w, "ERR", http.StatusInternalServerError)
+			return
+		}
+	}
+
+	fmt.Fprint(w, content)
+}
+
+func (s *root) storeV1(w http.ResponseWriter, r *http.Request) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	var id = ident.FromContext(ctx)
+
+	if !id.Session().Active {
+		span.RecordError(fmt.Errorf("NO_AUTH"))
+		http.Error(w, "NO_AUTH", http.StatusUnauthorized)
+		return
+	}
+
+	var config SpaceMap
+	var err error
+	contentType, _, _ := strings.Cut(r.Header.Get("Content-Type"), ";")
+	switch contentType {
+	case "text/plain":
+		config, err = ParseText(r.Body)
+		r.Body.Close()
+	case "application/x-www-form-urlencoded":
+		r.ParseForm()
+		config, err = ParseText(strings.NewReader(r.Form.Get("content")))
+	case "multipart/form-data":
+		r.ParseMultipartForm(1 << 20)
+		config, err = ParseText(strings.NewReader(r.Form.Get("content")))
+	default:
+		http.Error(w, "PARSE_ERR", http.StatusUnsupportedMediaType)
+		return
+	}
+	if err != nil {
+		span.RecordError(err)
+		http.Error(w, "PARSE_ERR", 400)
+		return
+	}
+
+	{
+		rules, err := Registry.GetRules(ctx, id)
+		if err != nil {
+			span.RecordError(err)
+			http.Error(w, "ERR: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		notify, err := Registry.GetNotify(ctx, "updated")
+		if err != nil {
+			span.RecordError(err)
+			http.Error(w, "ERR", http.StatusInternalServerError)
+			return
+		}
+		_ = rules
+		var notifyActive = make(map[string]struct{})
+		var filteredConfigs Config
+		for ns, c := range config {
+			if !rules.GetRoles("NS", ns).HasRole("write") {
+				span.AddEvent(fmt.Sprint("SKIP", ns))
+				continue
+			}
+
+			span.AddEvent(fmt.Sprint("SAVE", ns))
+			for _, n := range notify.Find(ns) {
+				notifyActive[n.Name] = struct{}{}
+			}
+			filteredConfigs = append(filteredConfigs, c)
+		}
+
+		err = Registry.WriteConfig(ctx, filteredConfigs)
+		if err != nil {
+			span.RecordError(err)
+			http.Error(w, "ERR", http.StatusInternalServerError)
+			return
+		}
+
+		span.AddEvent(fmt.Sprint("SEND NOTIFYS ", notifyActive))
+		for _, n := range notify {
+			if _, ok := notifyActive[n.Name]; ok {
+				err = Registry.SendNotify(ctx, n)
+				if err != nil {
+					span.RecordError(err)
+					http.Error(w, "ERR", http.StatusInternalServerError)
+					return
+				}
+			}
+		}
+		span.AddEvent("DONE!")
+	}
+
+	w.WriteHeader(202)
+	fmt.Fprint(w, "OK")
+}
+
+func (s *root) indexV1(w http.ResponseWriter, r *http.Request) {
+	ctx, span := lg.Span(r.Context())
+	defer span.End()
+
+	var id = ident.FromContext(ctx)
+
+	timer := time.Now()
+	defer func() { fmt.Println(time.Since(timer)) }()
+
+	if !id.Session().Active {
+		span.RecordError(fmt.Errorf("NO_AUTH"))
+		http.Error(w, "NO_AUTH", http.StatusUnauthorized)
+		return
+	}
+
+	rules, err := Registry.GetRules(ctx, id)
+	if err != nil {
+		span.RecordError(err)
+		http.Error(w, "ERR: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	span.AddEvent(fmt.Sprint(rules))
+
+	space := r.URL.Query().Get("space")
+	if space == "" {
+		space = "*"
+	}
+
+	ns := ParseNamespace(space)
+	ns = rules.ReduceSearch(ns)
+	span.AddEvent(ns.String())
+
+	lis, err := Registry.GetIndex(ctx, ns.String(), "")
+	if err != nil {
+		span.RecordError(err)
+		http.Error(w, "ERR: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	sort.Sort(lis)
+
+	switch httputil.NegotiateContentType(r, []string{
+		"text/plain",
+		"application/json",
+	}, "text/plain") {
+	case "text/plain":
+		_, err = fmt.Fprint(w, lis.StringList())
+		span.RecordError(err)
+	case "application/json":
+		err = json.NewEncoder(w).Encode(lis)
+		span.RecordError(err)
+	}
+}

mercury/sql/init-pg.sql

@@ -0,0 +1,118 @@
+CREATE SEQUENCE IF NOT EXISTS mercury_spaces_id_seq;
+
+CREATE TABLE IF NOT EXISTS mercury_spaces
+(
+    space character varying NOT NULL,
+    id integer NOT NULL DEFAULT nextval('mercury_spaces_id_seq'::regclass),
+    notes character varying[] NOT NULL DEFAULT '{}'::character varying[],
+    tags character varying[] NOT NULL DEFAULT '{}'::character varying[],
+    trailer character varying[] NOT NULL DEFAULT '{}'::character varying[],
+    CONSTRAINT mercury_namespace_pk PRIMARY KEY (id)
+);
+CREATE UNIQUE INDEX IF NOT EXISTS mercury_namespace_space_uindex
+    ON mercury_spaces USING btree
+    (space ASC NULLS LAST);
+
+CREATE TABLE IF NOT EXISTS mercury_values
+(
+    id integer NOT NULL,
+    seq integer NOT NULL,
+    name character varying NOT NULL,
+    "values" character varying[] NOT NULL DEFAULT '{}'::character varying[],
+    tags character varying[] NOT NULL DEFAULT '{}'::character varying[],
+    notes character varying[] NOT NULL DEFAULT '{}'::character varying[],
+    CONSTRAINT mercury_values_pk PRIMARY KEY (id, seq)
+);
+CREATE INDEX IF NOT EXISTS mercury_values_name_index
+    ON mercury_values USING btree
+    (name ASC NULLS LAST);
+
+CREATE OR REPLACE VIEW mercury_registry_vw
+ AS
+ SELECT 
+    s.id,
+    v.seq,
+    s.space,
+    v.name,
+    v."values",
+    v.notes,
+    v.tags,
+    s.trailer
+ FROM mercury_spaces s
+ JOIN mercury_values v ON s.id = v.id;
+
+CREATE OR REPLACE VIEW mercury_groups_vw
+ AS
+ SELECT DISTINCT 
+    unnest(vw."values") AS user_id,
+    vw.name AS group_id
+ FROM mercury_registry_vw vw
+ WHERE vw.space::text = 'mercury.groups'::text;
+
+CREATE OR REPLACE VIEW mercury_group_rules_vw
+ AS
+ WITH 
+ tt as (
+    SELECT DISTINCT
+        vw.name AS group_id,
+        unnest(vw."values") AS rules
+    FROM mercury_registry_vw vw
+    WHERE vw.space::text = 'mercury.policy'::text
+ )
+ SELECT tt.group_id,
+    split_part(tt.rules::text, ' '::text, 1) AS role,
+    split_part(tt.rules::text, ' '::text, 2) AS type,
+    split_part(tt.rules::text, ' '::text, 3) AS match
+ FROM tt;
+
+CREATE OR REPLACE VIEW mercury_user_rules_vw
+ AS
+ WITH
+ tt as (
+    SELECT DISTINCT 
+        vw.name AS group_id,
+        unnest(vw."values") AS rules
+    FROM mercury_registry_vw vw
+    WHERE vw.space::text = 'mercury.policy'::text
+ )
+ SELECT 
+    g.user_id,
+    split_part(tt.rules::text, ' '::text, 1) AS role,
+    split_part(tt.rules::text, ' '::text, 2) AS type,
+    split_part(tt.rules::text, ' '::text, 3) AS match
+ FROM mercury_groups_vw g
+ JOIN tt ON g.group_id::text = tt.group_id::text;
+
+CREATE OR REPLACE VIEW mercury_rules_vw
+ AS
+ SELECT 
+    'U-'::text || vw.user_id::text AS id,
+    vw.role,
+    vw.type,
+    vw.match
+ FROM mercury_user_rules_vw vw
+ UNION
+ SELECT 
+    'G-'::text || vw.group_id::text AS id,
+    vw.role,
+    vw.type,
+    vw.match
+ FROM mercury_group_rules_vw vw;
+
+CREATE OR REPLACE VIEW mercury_notify_vw
+ AS
+ WITH
+ tt as (
+    SELECT DISTINCT 
+        vw.name,
+        unnest(vw."values") AS rules
+    FROM mercury_registry_vw vw
+    WHERE vw.space::text = 'mercury.notify'::text
+ )
+ SELECT 
+    tt.name,
+    split_part(tt.rules::text, ' '::text, 1) AS match,
+    split_part(tt.rules::text, ' '::text, 2) AS event,
+    split_part(tt.rules::text, ' '::text, 3) AS method,
+    split_part(tt.rules::text, ' '::text, 4) AS url
+ FROM tt;

mercury/sql/init-sql3.sql

@@ -0,0 +1,120 @@
+CREATE TABLE IF NOT EXISTS mercury_spaces
+(
+    space character varying NOT NULL unique,
+    id integer NOT NULL CONSTRAINT mercury_namespace_pk PRIMARY KEY autoincrement,
+    notes json NOT NULL DEFAULT '[]',
+    tags json NOT NULL DEFAULT '[]',
+    trailer json NOT NULL DEFAULT '[]'
+);
+
+CREATE TABLE IF NOT EXISTS mercury_values
+(
+    id integer NOT NULL,
+    seq integer NOT NULL,
+    name character varying NOT NULL,
+    "values" json NOT NULL DEFAULT '[]',
+    tags json NOT NULL DEFAULT '[]',
+    notes json NOT NULL DEFAULT '[]',
+    CONSTRAINT mercury_values_pk PRIMARY KEY (id, seq)
+);
+
+drop view if exists mercury_registry_vw;
+CREATE VIEW if not exists mercury_registry_vw
+ AS
+ SELECT 
+    s.id,
+    v.seq,
+    s.space,
+    v.name,
+    v."values",
+    v.notes,
+    v.tags,
+    s.trailer
+ FROM mercury_spaces s
+ JOIN mercury_values v ON s.id = v.id;
+
+drop view if exists mercury_groups_vw;
+CREATE VIEW if not exists mercury_groups_vw
+ AS
+ SELECT DISTINCT 
+    j.value AS user_id,
+    vw.name AS group_id
+ FROM mercury_registry_vw vw, json_each(vw."values") j
+ WHERE vw.space = 'mercury.groups';
+
+drop view if exists mercury_group_rules_vw;
+CREATE VIEW if not exists mercury_group_rules_vw
+ AS
+ WITH 
+ tt as (
+    SELECT DISTINCT
+        vw.name AS group_id,
+        j.value AS rules
+    FROM mercury_registry_vw vw, json_each(vw."values") j
+    WHERE vw.space = 'mercury.policy'
+ )
+ SELECT tt.group_id,
+    tt.rules rule,
+    '' AS role,
+    '' AS type,
+    ''AS match
+ FROM tt;
+
+drop view if exists mercury_user_rules_vw;
+CREATE VIEW if not exists mercury_user_rules_vw
+ AS
+ WITH
+ tt as (
+    SELECT DISTINCT 
+        vw.name AS group_id,
+        j.value AS rules
+    FROM mercury_registry_vw vw, json_each(vw."values") j
+    WHERE vw.space = 'mercury.policy'
+ )
+ SELECT 
+    g.user_id,
+    tt.rules rule,
+    '' AS role,
+    '' AS type,
+    '' AS match
+ FROM mercury_groups_vw g
+ JOIN tt ON g.group_id = tt.group_id;
+
+drop view if exists mercury_rules_vw;
+CREATE VIEW if not exists mercury_rules_vw
+ AS
+ SELECT 
+    'U-' || vw.user_id AS id,
+    vw.rule,
+    vw.role,
+    vw.type,
+    vw.match
+ FROM mercury_user_rules_vw vw
+ UNION
+ SELECT 
+    'G-' || vw.group_id AS id,
+    vw.rule,
+    vw.role,
+    vw.type,
+    vw.match
+ FROM mercury_group_rules_vw vw;
+
+drop view if exists mercury_notify_vw;
+CREATE VIEW if not exists mercury_notify_vw
+ AS
+ WITH
+ tt as (
+    SELECT DISTINCT 
+        vw.name,
+        j.value AS rules
+    FROM mercury_registry_vw vw, json_each(vw."values") j
+    WHERE vw.space = 'mercury.notify'
+ )
+ SELECT 
+    tt.name,
+    tt.rules rule,
+    substr(tt.rules, 1, instr(tt.rules, ' ')-1) AS match,
+    substr(tt.rules, instr(tt.rules, ' ')+1, instr(substr(tt.rules, instr(tt.rules, ' ')+1), ' ')-1) AS event,
+    '' AS method,
+    '' as url
+ FROM tt;

mercury/sql/list-string.go

@@ -0,0 +1,130 @@
+package sql
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+type valueFn func() (v driver.Value, err error)
+
+func (fn valueFn) Value() (v driver.Value, err error) {
+	return fn()
+}
+
+type scanFn func(value any) error
+
+func (fn scanFn) Scan(v any) error {
+	return fn(v)
+}
+
+func listScan(e *[]string, ends [2]rune) scanFn {
+	return func(value any) error {
+		var str string
+		switch v := value.(type) {
+		case string:
+			str = v
+		case []byte:
+			str = string(v)
+		case []rune:
+			str = string(v)
+		default:
+			return fmt.Errorf("array must be uint64, got: %T", value)
+		}
+
+		if e == nil {
+			*e = []string{}
+		}
+
+		str = trim(str, ends[0], ends[1])
+		if len(str) == 0 {
+			return nil
+		}
+
+		for _, s := range splitComma(string(str)) {
+			*e = append(*e, s)
+		}
+
+		return nil
+	}
+}
+
+func listValue(e []string, ends [2]rune) valueFn {
+	return func() (value driver.Value, err error) {
+		var b strings.Builder
+
+		if len(e) == 0 {
+			return string(ends[:]), nil
+		}
+
+		_, err = b.WriteRune(ends[0])
+		if err != nil {
+			return
+		}
+
+		var arr []string
+		for _, s := range e {
+			arr = append(arr, `"`+s+`"`)
+		}
+		_, err = b.WriteString(strings.Join(arr, ","))
+		if err != nil {
+			return
+		}
+
+		_, err = b.WriteRune(ends[1])
+		if err != nil {
+			return
+		}
+
+		return b.String(), nil
+	}
+}
+
+func splitComma(s string) []string {
+	lastQuote := rune(0)
+	f := func(c rune) bool {
+		switch {
+		case c == lastQuote:
+			lastQuote = rune(0)
+			return false
+		case lastQuote != rune(0):
+			return false
+		case unicode.In(c, unicode.Quotation_Mark):
+			lastQuote = c
+			return false
+		default:
+			return c == ','
+		}
+	}
+	lis := strings.FieldsFunc(s, f)
+
+	var out []string
+	for _, s := range lis {
+		s = trim(s, '"', '"')
+		out = append(out, s)
+	}
+
+	return out
+}
+
+func trim(s string, start, end rune) string {
+	r0, size0 := utf8.DecodeRuneInString(s)
+	if size0 == 0 {
+		return s
+	}
+	if r0 != start {
+		return s
+	}
+
+	r1, size1 := utf8.DecodeLastRuneInString(s)
+	if size1 == 0 {
+		return s
+	}
+	if r1 != end {
+		return s
+	}
+
+	return s[size0 : len(s)-size1]
+}

mercury/sql/notify.go

@@ -0,0 +1,55 @@
+package sql
+
+import (
+	"context"
+	"strings"
+
+	"github.com/Masterminds/squirrel"
+
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/mercury"
+)
+
+// Notify stores the attributes for a registry space
+type Notify struct {
+	Name   string `json:"name" view:"mercury_notify_vw"`
+	Match  string `json:"match"`
+	Event  string `json:"event"`
+	Method string `json:"-" db:"method"`
+	URL    string `json:"-" db:"url"`
+}
+
+// GetNotify get list of rules
+func (pgm *sqlHandler) GetNotify(ctx context.Context, event string) (lis mercury.ListNotify, err error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	rows, err := squirrel.Select(`"name"`, `"match"`, `"event"`, `"method"`, `"url"`, `"rule"`).
+		From("mercury_notify_vw").
+		Where(squirrel.Eq{"event": event}).
+		PlaceholderFormat(squirrel.Dollar).
+		RunWith(pgm.db).
+		QueryContext(context.TODO())
+
+	if err != nil {
+		return nil, err
+	}
+
+	defer rows.Close()
+	for rows.Next() {
+		var s mercury.Notify
+		var rule string
+		err = rows.Scan(&s.Name, &s.Match, &s.Event, &s.Method, &s.URL, &rule)
+		if err != nil {
+			return nil, err
+		}
+		if rule != "" {
+			s.Match, rule, _ = strings.Cut(rule, " ")
+			s.Event, rule, _ = strings.Cut(rule, " ")
+			s.Method, s.URL, _ = strings.Cut(rule, " ")
+		}
+		lis = append(lis, s)
+	}
+
+	return lis, rows.Err()
+}

mercury/sql/otel.go

@@ -0,0 +1,40 @@
+package sql
+
+import (
+	"database/sql"
+
+	"go.nhat.io/otelsql"
+	semconv "go.opentelemetry.io/otel/semconv/v1.20.0"
+)
+
+func openDB(driver, dsn string) (*sql.DB, error) {
+	system := semconv.DBSystemPostgreSQL
+	if driver == "sqlite" {
+		system = semconv.DBSystemSqlite
+	}
+	
+	// Register the otelsql wrapper for the provided postgres driver.
+	driverName, err := otelsql.Register(driver,
+		otelsql.AllowRoot(),
+		otelsql.TraceQueryWithoutArgs(),
+		otelsql.TraceRowsClose(),
+		otelsql.TraceRowsAffected(),
+		// otelsql.WithDatabaseName("my_database"),        // Optional.
+		otelsql.WithSystem(system), // Optional.
+	)
+	if err != nil {
+		return nil, err
+	}
+	
+	// Connect to a Postgres database using the postgres driver wrapper.
+	db, err := sql.Open(driverName, dsn)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := otelsql.RecordStats(db); err != nil {
+		return nil, err
+	}
+
+	return db, nil
+}

mercury/sql/rules.go

@@ -0,0 +1,99 @@
+package sql
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/Masterminds/squirrel"
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/mercury"
+	"go.sour.is/pkg/ident"
+)
+
+type grouper interface {
+	GetGroups() []string
+}
+
+// GetRules get list of rules
+func (p *sqlHandler) GetRules(ctx context.Context, user ident.Ident) (lis mercury.Rules, err error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	var ids []string
+	ids = append(ids, "U-"+user.Identity())
+	switch u := user.(type) {
+	case grouper:
+		for _, g := range u.GetGroups() {
+			ids = append(ids, "G-"+g)
+		}
+	}
+	if groups, err := p.getGroups(ctx, user.Identity()); err != nil {
+		for _, g := range groups {
+			ids = append(ids, "G-"+g)
+		}
+	}
+
+	query := squirrel.Select(`"role"`, `"type"`, `"match"`, `"rule"`).
+		From("mercury_rules_vw").
+		Where(squirrel.Eq{"id": ids}).
+		PlaceholderFormat(squirrel.Dollar)
+	rows, err := query.
+		RunWith(p.db).
+		QueryContext(ctx)
+
+	if err != nil {
+		span.RecordError(err)
+		return nil, err
+	}
+
+	defer rows.Close()
+	for rows.Next() {
+		var s mercury.Rule
+		var rule string
+		err = rows.Scan(&s.Role, &s.Type, &s.Match, &rule)
+		if err != nil {
+			span.RecordError(err)
+			return nil, err
+		}
+		if rule != "" {
+			s.Role, rule, _ = strings.Cut(rule, " ")
+			s.Type, s.Match, _ = strings.Cut(rule, " ")
+		}
+		lis = append(lis, s)
+	}
+	err = rows.Err()
+	span.RecordError(err)
+
+	span.AddEvent(fmt.Sprint("read rules ", len(lis)))
+	return lis, err
+}
+
+// getGroups get list of groups
+func (pgm *sqlHandler) getGroups(ctx context.Context, user string) (lis []string, err error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	rows, err := squirrel.Select("group_id").
+		From("mercury_groups_vw").
+		Where(squirrel.Eq{"user_id": user}).
+		PlaceholderFormat(squirrel.Dollar).
+		RunWith(pgm.db).
+		QueryContext(ctx)
+
+	if err != nil {
+		return nil, err
+	}
+
+	defer rows.Close()
+	for rows.Next() {
+		var s string
+		err = rows.Scan(&s)
+		if err != nil {
+			return nil, err
+		}
+		lis = append(lis, s)
+	}
+
+	return lis, rows.Err()
+}

mercury/sql/sql.go

@@ -0,0 +1,426 @@
+package sql
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"log"
+	"strings"
+
+	sq "github.com/Masterminds/squirrel"
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/mercury"
+	"go.sour.is/pkg/rsql"
+	"golang.org/x/exp/maps"
+)
+
+type sqlHandler struct {
+	db               *sql.DB
+	paceholderFormat sq.PlaceholderFormat
+	listFormat       [2]rune
+}
+
+var (
+	_ mercury.GetIndex    = (*sqlHandler)(nil)
+	_ mercury.GetConfig   = (*sqlHandler)(nil)
+	_ mercury.GetRules    = (*sqlHandler)(nil)
+	_ mercury.WriteConfig = (*sqlHandler)(nil)
+)
+
+func Register() {
+	mercury.Registry.Register("sql", func(s *mercury.Space) any {
+		var dsn string
+		var opts strings.Builder
+		var dbtype string
+		for _, c := range s.List {
+			if c.Name == "match" {
+				continue
+			}
+			if c.Name == "dbtype" {
+				dbtype = c.First()
+				continue
+			}
+			if c.Name == "dsn" {
+				dsn = c.First()
+				break
+			}
+			fmt.Fprintln(&opts, c.Name, "=", c.First())
+		}
+		if dsn == "" {
+			dsn = opts.String()
+		}
+
+		db, err := openDB(dbtype, dsn)
+		if err != nil {
+			return err
+		}
+		if err = db.Ping(); err != nil {
+			return err
+		}
+		switch dbtype {
+		case "sqlite":
+			return &sqlHandler{db, sq.Dollar, [2]rune{'[', ']'}}
+		case "postgres":
+			return &sqlHandler{db, sq.Dollar, [2]rune{'{', '}'}}
+		default:
+			return fmt.Errorf("unsupported dbtype: %s", dbtype)
+		}
+	})
+}
+
+type Space struct {
+	mercury.Space
+	ID uint64
+}
+type Value struct {
+	mercury.Value
+	ID uint64
+}
+
+func (p *sqlHandler) GetIndex(ctx context.Context, search mercury.NamespaceSearch, pgm *rsql.Program) (mercury.Config, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	cols := rsql.GetDbColumns(mercury.Space{})
+	where, err := getWhere(search, cols)
+	if err != nil {
+		return nil, err
+	}
+	lis, err := p.listSpace(ctx, nil, where)
+	if err != nil {
+		log.Println(err)
+		return nil, err
+	}
+
+	config := make(mercury.Config, len(lis))
+	for i, s := range lis {
+		config[i] = &s.Space
+	}
+
+	return config, nil
+}
+
+func (p *sqlHandler) GetConfig(ctx context.Context, search mercury.NamespaceSearch, pgm *rsql.Program, fields []string) (mercury.Config, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	idx, err := p.GetIndex(ctx, search, pgm)
+	if err != nil {
+		return nil, err
+	}
+	spaceMap := make(map[string]int, len(idx))
+	for u, s := range idx {
+		spaceMap[s.Space] = u
+	}
+
+	where, err := getWhere(search, rsql.GetDbColumns(mercury.Value{}))
+	if err != nil {
+		return nil, err
+	}
+	query := sq.Select(`"space"`, `"name"`, `"seq"`, `"notes"`, `"tags"`, `"values"`).
+		From("mercury_registry_vw").
+		Where(where).
+		OrderBy("space asc", "name asc").
+		PlaceholderFormat(p.paceholderFormat)
+	span.AddEvent(lg.LogQuery(query.ToSql()))
+	rows, err := query.RunWith(p.db).
+		QueryContext(ctx)
+
+	if err != nil {
+		log.Println(err)
+		return nil, err
+	}
+
+	defer rows.Close()
+	for rows.Next() {
+		var s mercury.Value
+
+		err = rows.Scan(
+			&s.Space,
+			&s.Name,
+			&s.Seq,
+			listScan(&s.Notes, p.listFormat),
+			listScan(&s.Tags, p.listFormat),
+			listScan(&s.Values, p.listFormat),
+		)
+		if err != nil {
+			return nil, err
+		}
+		if u, ok := spaceMap[s.Space]; ok {
+			idx[u].List = append(idx[u].List, s)
+		}
+	}
+
+	err = rows.Err()
+	span.RecordError(err)
+
+	span.AddEvent(fmt.Sprint("read index ", len(idx)))
+	return idx, err
+}
+
+func (p *sqlHandler) listSpace(ctx context.Context, tx sq.BaseRunner, where sq.Sqlizer) ([]*Space, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	if tx == nil {
+		tx = p.db
+	}
+
+	query := sq.Select(`"id"`, `"space"`, `"notes"`, `"tags"`, `"trailer"`).
+		From("mercury_spaces").
+		Where(where).
+		OrderBy("space asc").
+		PlaceholderFormat(sq.Dollar)
+	span.AddEvent(lg.LogQuery(query.ToSql()))
+	rows, err := query.RunWith(tx).
+		QueryContext(ctx)
+
+	if err != nil {
+		log.Println(err)
+		return nil, err
+	}
+	defer rows.Close()
+
+	var lis []*Space
+	for rows.Next() {
+		var s Space
+		err = rows.Scan(
+			&s.ID,
+			&s.Space.Space,
+			listScan(&s.Space.Notes, p.listFormat),
+			listScan(&s.Space.Tags, p.listFormat),
+			listScan(&s.Trailer, p.listFormat),
+		)
+		if err != nil {
+			return nil, err
+		}
+		lis = append(lis, &s)
+	}
+
+	err = rows.Err()
+	span.RecordError(err)
+
+	span.AddEvent(fmt.Sprint("read config ", len(lis)))
+	return lis, err
+}
+
+// WriteConfig writes a config map to database
+func (p *sqlHandler) WriteConfig(ctx context.Context, config mercury.Config) (err error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	// Delete spaces that are present in input but are empty.
+	deleteSpaces := make(map[string]struct{})
+
+	// get names of each space
+	var names = make(map[string]int)
+	for i, v := range config {
+		names[v.Space] = i
+
+		if len(v.Tags) == 0 && len(v.Notes) == 0 && len(v.List) == 0 {
+			deleteSpaces[v.Space] = struct{}{}
+		}
+	}
+
+	tx, err := p.db.Begin()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err != nil && tx != nil {
+			tx.Rollback()
+		}
+	}()
+
+	// get current spaces
+	lis, err := p.listSpace(ctx, tx, sq.Eq{"space": maps.Keys(names)})
+	if err != nil {
+		return
+	}
+
+	// determine which are being updated
+	var deleteIDs []uint64
+	var updateIDs []uint64
+	var currentNames = make(map[string]struct{}, len(lis))
+	var updateSpaces []*mercury.Space
+	var insertSpaces []*mercury.Space
+
+	for _, s := range lis {
+		spaceName := s.Space.Space
+		currentNames[spaceName] = struct{}{}
+
+		if _, ok := deleteSpaces[spaceName]; ok {
+			deleteIDs = append(deleteIDs, s.ID)
+			continue
+		}
+
+		updateSpaces = append(updateSpaces, config[names[spaceName]])
+		updateIDs = append(updateIDs, s.ID)
+	}
+	for _, s := range config {
+		spaceName := s.Space
+		if _, ok := currentNames[spaceName]; !ok {
+			insertSpaces = append(insertSpaces, s)
+		}
+	}
+
+	// delete spaces
+	if ids := deleteIDs; len(ids) > 0 {
+		_, err = sq.Delete("mercury_spaces").Where(sq.Eq{"id": ids}).RunWith(tx).PlaceholderFormat(sq.Dollar).ExecContext(ctx)
+		if err != nil {
+			return err
+		}
+	}
+
+	// delete values
+	if ids := append(updateIDs, deleteIDs...); len(ids) > 0 {
+		_, err = sq.Delete("mercury_values").Where(sq.Eq{"id": ids}).RunWith(tx).PlaceholderFormat(sq.Dollar).ExecContext(ctx)
+		if err != nil {
+			return err
+		}
+	}
+
+	var newValues []*Value
+
+	// update spaces
+	for i, u := range updateSpaces {
+		query := sq.Update("mercury_spaces").
+			Where(sq.Eq{"id": updateIDs[i]}).
+			Set("tags", listValue(u.Tags, p.listFormat)).
+			Set("notes", listValue(u.Notes, p.listFormat)).
+			Set("trailer", listValue(u.Trailer, p.listFormat)).
+			PlaceholderFormat(sq.Dollar)
+		span.AddEvent(lg.LogQuery(query.ToSql()))
+		_, err := query.RunWith(tx).ExecContext(ctx)
+
+		if err != nil {
+			return err
+		}
+		// log.Debugf("UPDATED %d SPACES", len(updateSpaces))
+		for _, v := range u.List {
+			newValues = append(newValues, &Value{Value: v, ID: updateIDs[i]})
+		}
+	}
+
+	// insert spaces
+	for _, s := range insertSpaces {
+		var id uint64
+		query := sq.Insert("mercury_spaces").
+			PlaceholderFormat(sq.Dollar).
+			Columns("space", "tags", "notes", "trailer").
+			Values(
+				s.Space, 
+				listValue(s.Tags, p.listFormat), 
+				listValue(s.Notes, p.listFormat),
+				listValue(s.Trailer, p.listFormat),
+				).
+			Suffix("RETURNING \"id\"")
+		span.AddEvent(lg.LogQuery(query.ToSql()))
+
+		err := query.
+			RunWith(tx).
+			QueryRowContext(ctx).
+			Scan(&id)
+		if err != nil {
+			s, v, _ := query.ToSql()
+			log.Println(s, v, err)
+			return err
+		}
+		for _, v := range s.List {
+			newValues = append(newValues, &Value{Value: v, ID: id})
+		}
+	}
+
+	// write all values to db.
+	err = p.writeValues(ctx, tx, newValues)
+	// log.Debugf("WROTE %d ATTRS", len(attrs))
+
+	tx.Commit()
+	tx = nil
+
+	return
+}
+
+// writeValues writes the values to db
+func (p *sqlHandler) writeValues(ctx context.Context, tx sq.BaseRunner, lis []*Value) (err error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	if len(lis) == 0 {
+		return nil
+	}
+
+	newInsert := func() sq.InsertBuilder {
+		return sq.Insert("mercury_values").
+			RunWith(tx).
+			PlaceholderFormat(sq.Dollar).
+			Columns(
+				`"id"`,
+				`"seq"`,
+				`"name"`,
+				`"values"`,
+				`"notes"`,
+				`"tags"`,
+			)
+	}
+	chunk := int(65000 / 3)
+	insert := newInsert()
+	for i, s := range lis {
+		insert = insert.Values(
+			s.ID,
+			s.Seq,
+			s.Name,
+			listValue(s.Values, p.listFormat),
+			listValue(s.Notes, p.listFormat),
+			listValue(s.Tags, p.listFormat),
+		)
+		// log.Debug(s.Name)
+
+		if i > 0 && i%chunk == 0 {
+			// log.Debugf("inserting %v rows into %v", i%chunk, d.Table)
+			// log.Debug(insert.ToSql())
+			span.AddEvent(lg.LogQuery(insert.ToSql()))
+
+			_, err = insert.ExecContext(ctx)
+			if err != nil {
+				// log.Error(err)
+				return
+			}
+
+			insert = newInsert()
+		}
+	}
+	if len(lis)%chunk > 0 {
+		// log.Debugf("inserting %v rows into %v", len(lis)%chunk, d.Table)
+		// log.Debug(insert.ToSql())
+		span.AddEvent(lg.LogQuery(insert.ToSql()))
+
+		_, err = insert.ExecContext(ctx)
+		if err != nil {
+			// log.Error(err)
+			return
+		}
+	}
+
+	return
+}
+
+func getWhere(search mercury.NamespaceSearch, d *rsql.DbColumns) (sq.Sqlizer, error) {
+	var where sq.Or
+	space, err := d.Col("space")
+	if err != nil {
+		return nil, err
+	}
+	for _, m := range search {
+		switch m.(type) {
+		case mercury.NamespaceNode:
+			where = append(where, sq.Eq{space: m.Value()})
+		case mercury.NamespaceStar:
+			where = append(where, sq.Like{space: m.Value()})
+		case mercury.NamespaceTrace:
+			e := sq.Expr(`? LIKE `+space+` || '%'`, m.Value())
+			where = append(where, e)
+		}
+	}
+	return where, nil
+}

mux/httpmux.go

@@ -8,6 +8,7 @@ type mux struct {
 	*http.ServeMux
 	api       *http.ServeMux
 	wellknown *http.ServeMux
+	handler   http.Handler
 }
 
 func (mux *mux) Add(fns ...interface{ RegisterHTTP(*http.ServeMux) }) {
@@ -24,16 +25,30 @@ func (mux *mux) Add(fns ...interface{ RegisterHTTP(*http.ServeMux) }) {
 			// log.Printf("WellKnown: %T", fn)
 			fn.RegisterWellKnown(mux.wellknown)
 		}
+
+		if fn, ok := fn.(interface{ RegisterMiddleware(http.Handler) http.Handler }); ok {
+			hdlr := mux.handler
+			// log.Printf("WellKnown: %T", fn)
+			mux.handler = fn.RegisterMiddleware(hdlr)
+		}
 	}
 }
+
+func (mux *mux) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	mux.handler.ServeHTTP(w, r)
+} 
+
+
 func New() *mux {
 	mux := &mux{
 		api:       http.NewServeMux(),
 		wellknown: http.NewServeMux(),
 		ServeMux:  http.NewServeMux(),
 	}
+	mux.Handle("/v1/", http.StripPrefix("/v1", mux.api))
 	mux.Handle("/api/v1/", http.StripPrefix("/api/v1", mux.api))
 	mux.Handle("/.well-known/", http.StripPrefix("/.well-known", mux.wellknown))
+	mux.handler = mux.ServeMux
 
 	return mux
 }

rsql/ast.go

@@ -0,0 +1,255 @@
+package rsql
+
+import (
+	"bytes"
+	"strings"
+)
+
+// Node is the smallest unit of ast
+type Node interface {
+	TokenLiteral() string
+	String() string
+}
+
+// Statement is a executable tree
+type Statement interface {
+	Node
+	statementNode()
+}
+
+// Expression is a portion of tree
+type Expression interface {
+	Node
+	expressionNode()
+}
+
+// Identifier is a variable name
+type Identifier struct {
+	Token Token
+	Value string
+}
+
+func (i *Identifier) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (i *Identifier) TokenLiteral() string { return i.Token.Literal }
+
+// String returns a string representation of value
+func (i *Identifier) String() string { return i.Value }
+
+// Integer is a numeric value
+type Integer struct {
+	Token Token
+	Value int64
+}
+
+func (i *Integer) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (i *Integer) TokenLiteral() string { return i.Token.Literal }
+
+// String returns a string representation of value
+func (i *Integer) String() string { return i.Token.Literal }
+
+// Float is a floating point value
+type Float struct {
+	Token Token
+	Value float64
+}
+
+func (i *Float) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (i *Float) TokenLiteral() string { return i.Token.Literal }
+
+// String returns a string representation of value
+func (i *Float) String() string { return i.Token.Literal }
+
+// Bool is a boolean value
+type Bool struct {
+	Token Token
+	Value bool
+}
+
+func (i *Bool) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (i *Bool) TokenLiteral() string { return i.Token.Literal }
+
+// String returns a string representation of value
+func (i *Bool) String() string { return i.Token.Literal }
+
+// Null is an empty value
+type Null struct {
+	Token Token
+}
+
+func (i *Null) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (i *Null) TokenLiteral() string { return i.Token.Literal }
+
+// String returns a string representation of value
+func (i *Null) String() string { return i.Token.Literal }
+
+// String is an array of codepoints
+type String struct {
+	Token Token
+	Value string
+}
+
+func (i *String) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (i *String) TokenLiteral() string { return i.Token.Literal }
+
+// String returns a string representation of value
+func (i *String) String() string {
+	var out bytes.Buffer
+
+	out.WriteRune('"')
+	out.WriteString(i.Value)
+	out.WriteRune('"')
+
+	return out.String()
+}
+
+// Array is an array of tokens
+type Array struct {
+	Token    Token
+	Elements []Expression
+}
+
+func (a *Array) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (a *Array) TokenLiteral() string { return a.Token.Literal }
+
+// String returns a string representation of value
+func (a *Array) String() string {
+	var out bytes.Buffer
+
+	var elements []string
+	for _, el := range a.Elements {
+		elements = append(elements, el.String())
+	}
+
+	out.WriteRune('(')
+	out.WriteString(strings.Join(elements, ","))
+	out.WriteRune(')')
+
+	return out.String()
+}
+
+// Program is a collection of statements
+type Program struct {
+	Statements []Statement
+	Args       map[string]string
+}
+
+func (p *Program) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (p *Program) TokenLiteral() string {
+	if len(p.Statements) > 0 {
+		return p.Statements[0].TokenLiteral()
+	}
+	return ""
+}
+
+// String returns a string representation of value
+func (p *Program) String() string {
+	var out bytes.Buffer
+
+	for _, s := range p.Statements {
+		out.WriteString(s.String())
+	}
+	if len(p.Args) > 0 {
+		out.WriteRune('|')
+		for a, b := range p.Args {
+			out.WriteRune(' ')
+			out.WriteString(a)
+			out.WriteRune(':')
+			out.WriteString(b)
+		}
+	}
+	return out.String()
+}
+
+// ExpressionStatement is a collection of expressions
+type ExpressionStatement struct {
+	Token      Token
+	Expression Expression
+}
+
+func (ExpressionStatement) statementNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (e ExpressionStatement) TokenLiteral() string { return e.Token.Literal }
+
+// String returns a string representation of value
+func (e ExpressionStatement) String() string {
+	if e.Expression != nil {
+		return e.Expression.String()
+	}
+
+	return ""
+}
+
+// PrefixExpression is an expression with a preceeding operator
+type PrefixExpression struct {
+	Token    Token
+	Operator string
+	Right    Expression
+}
+
+func (p *PrefixExpression) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (p *PrefixExpression) TokenLiteral() string { return p.Token.Literal }
+
+// String returns a string representation of value
+func (p *PrefixExpression) String() string {
+	var out bytes.Buffer
+
+	out.WriteRune('(')
+	out.WriteString(p.Operator)
+	out.WriteString(p.Right.String())
+	out.WriteRune(')')
+
+	return out.String()
+}
+
+// InfixExpression is two expressions with a infix operator
+type InfixExpression struct {
+	Token    Token
+	Left     Expression
+	Operator string
+	Right    Expression
+}
+
+func (i *InfixExpression) expressionNode() {}
+
+// TokenLiteral returns the literal value of a token
+func (i *InfixExpression) TokenLiteral() string { return i.Token.Literal }
+
+// String returns a string representation of value
+func (i *InfixExpression) String() string {
+	var out bytes.Buffer
+
+	out.WriteRune('(')
+	if i.Left != nil {
+		out.WriteString(i.Left.String())
+	} else {
+		out.WriteString("nil")
+	}
+	out.WriteString(i.Operator)
+	if i.Right != nil {
+		out.WriteString(i.Right.String())
+	} else {
+		out.WriteString("nil")
+	}
+	out.WriteRune(')')
+
+	return out.String()
+}

rsql/ast_test.go

@@ -0,0 +1,21 @@
+package rsql
+
+import "testing"
+
+func TestString(t *testing.T) {
+	program := &Program{
+		Statements: []Statement {
+			ExpressionStatement{
+				Token: Token{TokEQ, "=="},
+				Expression: &InfixExpression{
+					Token: Token{TokEQ, "=="},
+					Left: &Identifier{Token{TokIdent,"foo"}, "foo"},
+					Operator: "==",
+					Right: &Integer{Token{TokInteger, "5"}, 5},
+				},
+			},
+		},
+	}
+
+	t.Log(program.String())
+}

rsql/dbcolumns.go

@@ -0,0 +1,90 @@
+package rsql
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+	"unicode"
+)
+
+// DbColumns database model metadata
+type DbColumns struct {
+	Cols  []string
+	index map[string]int
+	Table     string
+	View      string
+}
+
+// Col returns the mapped column names
+func (d *DbColumns) Col(column string) (s string, err error) {
+	idx, ok := d.Index(column)
+	if !ok {
+		err = fmt.Errorf("column not found on table: %v", column)
+		return
+	}
+	return d.Cols[idx], err
+}
+
+// Index returns the column number
+func (d *DbColumns) Index(column string) (idx int, ok bool) {
+	idx, ok = d.index[column]
+	return
+}
+
+// GetDbColumns builds a metadata struct
+func GetDbColumns(o interface{}) *DbColumns {
+	d := DbColumns{}
+	t := reflect.TypeOf(o)
+
+	d.index = make(map[string]int)
+	for i := 0; i < t.NumField(); i++ {
+		field := t.Field(i)
+
+		sp := append(strings.Split(field.Tag.Get("db"), ","), "")
+
+		tag := sp[0]
+
+		json := field.Tag.Get("json")
+		if tag == "" {
+			tag = json
+		}
+
+		graphql := field.Tag.Get("graphql")
+		if tag == "" {
+			tag = graphql
+		}
+
+		if tag == "-" {
+			continue
+		}
+
+		if tag == "" {
+			tag = field.Name
+		}
+
+		d.index[field.Name] = len(d.Cols)
+
+		if _, ok := d.index[tag]; !ok && tag != "" {
+			d.index[tag] = len(d.Cols)
+		}
+		if _, ok := d.index[json]; !ok && json != "" {
+			d.index[json] = len(d.Cols)
+		}
+		if _, ok := d.index[graphql]; !ok && graphql != "" {
+			d.index[graphql] = len(d.Cols)
+		} else if !ok && graphql == "" {
+			a := []rune(field.Name)
+			for i := 0; i < len(a); i++ {
+				if unicode.IsLower(a[i]) {
+					break
+				}
+				a[i] = unicode.ToLower(a[i])
+			}
+			graphql = string(a)
+			d.index[graphql] = len(d.Cols)
+		}
+
+		d.Cols = append(d.Cols, tag)
+	}
+	return &d
+}

rsql/lexer.go

@@ -0,0 +1,258 @@
+package rsql
+
+import (
+	"unicode"
+	"unicode/utf8"
+)
+
+type Lexer struct {
+	input        string
+	position     int
+	readPosition int
+	rune         rune
+}
+
+// NewLexer returns a new lexing generator
+func NewLexer(in string) *Lexer {
+	l := &Lexer{input: in}
+	l.readRune()
+	return l
+}
+
+// NextToken returns the next token from lexer
+func (l *Lexer) NextToken() Token {
+	var tok Token
+
+	l.skipSpace()
+
+	switch l.rune {
+	case '-':
+		l.readRune()
+		if isNumber(l.rune) {
+			var isFloat bool
+			tok.Literal, isFloat = l.readNumber()
+			if isFloat {
+				tok.Type = TokFloat
+			} else {
+				tok.Type = TokInteger
+			}
+
+		} else if isLetter(l.rune) {
+			tok.Literal = l.readIdentifier()
+			tok.Type = lookupIdent(tok.Literal)
+
+		} else {
+			tok = newToken(TokIllegal, l.rune)
+			return tok
+		}
+
+		tok.Literal = "-" + tok.Literal
+		return tok
+	case '=':
+		r := l.peekRune()
+		if r == '=' {
+			r := l.rune
+			l.readRune()
+			tok.Type, tok.Literal = TokEQ, string(r)+string(l.rune)
+		} else if isLetter(r) {
+			tok = l.readFIQL()
+
+			return tok
+		} else {
+			tok = newToken(TokIllegal, l.rune)
+		}
+	case ';':
+		tok = newToken(TokAND, l.rune)
+	case ',':
+		tok = newToken(TokOR, l.rune)
+	case ')':
+		tok = newToken(TokRParen, l.rune)
+	case '(':
+		tok = newToken(TokLParen, l.rune)
+	case ']':
+		tok = newToken(TokRBracket, l.rune)
+	case '[':
+		tok = newToken(TokLBracket, l.rune)
+	case '~':
+		tok = newToken(TokLIKE, l.rune)
+	case '!':
+		if l.peekRune() == '=' {
+			r := l.rune
+			l.readRune()
+			tok.Type, tok.Literal = TokNEQ, string(r)+string(l.rune)
+		} else if l.peekRune() == '~' {
+			r := l.rune
+			l.readRune()
+			tok.Type, tok.Literal = TokNLIKE, string(r)+string(l.rune)
+		} else {
+			tok = newToken(TokIllegal, l.rune)
+			return tok
+		}
+	case '<':
+		if l.peekRune() == '=' {
+			r := l.rune
+			l.readRune()
+			tok.Type, tok.Literal = TokLE, string(r)+string(l.rune)
+		} else {
+			tok = newToken(TokLT, l.rune)
+		}
+	case '>':
+		if l.peekRune() == '=' {
+			r := l.rune
+			l.readRune()
+			tok.Type, tok.Literal = TokGE, string(r)+string(l.rune)
+		} else {
+			tok = newToken(TokGT, l.rune)
+		}
+	case '"', '\'':
+		tok.Type = TokString
+		tok.Literal = l.readString(l.rune)
+	case 0:
+		tok.Type, tok.Literal = TokEOF, ""
+	default:
+		if isNumber(l.rune) {
+			var isFloat bool
+			tok.Literal, isFloat = l.readNumber()
+			if isFloat {
+				tok.Type = TokFloat
+			} else {
+				tok.Type = TokInteger
+			}
+
+		} else if isLetter(l.rune) {
+			tok.Literal = l.readIdentifier()
+			tok.Type = lookupIdent(tok.Literal)
+
+		} else {
+			tok = newToken(TokIllegal, l.rune)
+			return tok
+		}
+
+		return tok
+	}
+
+	l.readRune()
+	return tok
+}
+
+func (l *Lexer) readRune() {
+	var size int
+	if l.readPosition >= len(l.input) {
+		l.rune = 0
+	} else {
+		l.rune, size = utf8.DecodeRuneInString(l.input[l.readPosition:])
+	}
+
+	l.position = l.readPosition
+	l.readPosition += size
+}
+func (l *Lexer) peekRune() rune {
+	if l.readPosition >= len(l.input) {
+		return 0
+	}
+	r, _ := utf8.DecodeRuneInString(l.input[l.readPosition:])
+	return r
+}
+
+func (l *Lexer) skipSpace() {
+	for unicode.IsSpace(l.rune) {
+		l.readRune()
+	}
+}
+
+func (l *Lexer) readIdentifier() string {
+	position := l.position
+	if isLetter(l.rune) {
+		l.readRune()
+	}
+
+	for isLetter(l.rune) || isNumber(l.rune) {
+		l.readRune()
+	}
+
+	return l.input[position:l.position]
+}
+
+func (l *Lexer) readNumber() (string, bool) {
+	isFloat := false
+
+	position := l.position
+	for isNumber(l.rune) {
+		if l.rune == '.' {
+			isFloat = true
+		}
+
+		l.readRune()
+	}
+
+	return l.input[position:l.position], isFloat
+}
+func (l *Lexer) readString(st rune) string {
+	position := l.position + 1
+	escape := false
+	for {
+		l.readRune()
+
+		if l.rune == '\\' {
+			escape = true
+
+			continue
+		}
+		if escape {
+			escape = false
+			continue
+		}
+		if l.rune == st || l.rune == 0 {
+			break
+		}
+	}
+
+	return l.input[position:l.position]
+
+}
+func (l *Lexer) readFIQL() Token {
+	l.readRune()
+	s := l.readIdentifier()
+	if l.rune != '=' {
+		return Token{TokIllegal, "=" + s}
+	}
+	l.readRune()
+
+	switch s {
+	case "eq":
+		return Token{TokEQ, "=" + s + "="}
+	case "neq":
+		return Token{TokNEQ, "=" + s + "="}
+	case "gt":
+		return Token{TokGT, "=" + s + "="}
+	case "ge":
+		return Token{TokGE, "=" + s + "="}
+	case "lt":
+		return Token{TokLT, "=" + s + "="}
+	case "le":
+		return Token{TokLE, "=" + s + "="}
+	default:
+		return Token{TokExtend, "=" + s + "="}
+	}
+}
+
+func isLetter(r rune) bool {
+	if unicode.IsSpace(r) {
+		return false
+	}
+	switch r {
+	case '"', '\'', '(', ')', ';', ',', '=', '!', '~', '<', '>', '[', ']':
+		return false
+	}
+	if '0' < r && r < '9' || r == '.' {
+		return false
+	}
+
+	return unicode.IsPrint(r)
+}
+func isNumber(r rune) bool {
+	if '0' <= r && r <= '9' || r == '.' {
+		return true
+	}
+	return false
+}

rsql/lexer_test.go

@@ -0,0 +1,105 @@
+package rsql
+
+import (
+	"testing"
+
+	"github.com/matryer/is"
+)
+
+func TestReservedToken(t *testing.T) {
+	input := `( ) ; , == != ~ < > <= >= [ ]`
+	tests := []struct {
+		expectedType    TokenType
+		expectedLiteral string
+	}{
+		{TokLParen, "("},
+		{TokRParen, ")"},
+		{TokAND, ";"},
+		{TokOR, ","},
+		{TokEQ, "=="},
+		{TokNEQ, "!="},
+		{TokLIKE, "~"},
+		{TokLT, "<"},
+		{TokGT, ">"},
+		{TokLE, "<="},
+		{TokGE, ">="},
+		{TokLBracket, "["},
+		{TokRBracket, "]"},
+	}
+
+	t.Run("Reserved Tokens", func(t *testing.T) {
+		is := is.New(t)
+
+		l := NewLexer(input)
+
+		for _, tt := range tests {
+			tok := l.NextToken()
+			is.Equal(tt.expectedType, tok.Type)
+			is.Equal(tt.expectedLiteral, tok.Literal)
+		}
+	})
+}
+func TestNextToken(t *testing.T) {
+	input := `director=='name\'s';actor=eq="name's";Year=le=2000,Year>=2010;(one <= -1.0, two != true),three=in=(1,2,3);c4==5`
+	tests := []struct {
+		expectedType    TokenType
+		expectedLiteral string
+	}{
+		{TokIdent, `director`},
+		{TokEQ, `==`},
+		{TokString, `name\'s`},
+		{TokAND, `;`},
+		{TokIdent, `actor`},
+		{TokEQ, `=eq=`},
+		{TokString, `name's`},
+		{TokAND, `;`},
+		{TokIdent, "Year"},
+		{TokLE, "=le="},
+		{TokInteger, "2000"},
+		{TokOR, ","},
+		{TokIdent, "Year"},
+		{TokGE, ">="},
+		{TokInteger, "2010"},
+		{TokAND, ";"},
+		{TokLParen, "("},
+		{TokIdent, "one"},
+		{TokLE, "<="},
+		{TokFloat, "-1.0"},
+		{TokOR, ","},
+		{TokIdent, "two"},
+		{TokNEQ, "!="},
+		{TokTRUE, "true"},
+		{TokRParen, ")"},
+		{TokOR, ","},
+		{TokIdent, "three"},
+		{TokExtend, "=in="},
+		{TokLParen, "("},
+		{TokInteger, "1"},
+		{TokOR, ","},
+		{TokInteger, "2"},
+		{TokOR, ","},
+		{TokInteger, "3"},
+		{TokRParen, ")"},
+		{TokAND, ";"},
+		{TokIdent, "c4"},
+		{TokEQ, "=="},
+		{TokInteger, "5"},
+	}
+
+	t.Run("Next Token Parsing", func(t *testing.T) {
+		is := is.New(t)
+
+		l := NewLexer(input)
+
+		c := 0
+		for _, tt := range tests {
+			c++
+			tok := l.NextToken()
+
+			is.Equal(tt.expectedType, tok.Type)
+			is.Equal(tt.expectedLiteral, tok.Literal)
+
+		}
+		is.Equal(c, len(tests))
+	})
+}

rsql/parser.go

@@ -0,0 +1,285 @@
+package rsql
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Precidence enumerations
+const (
+	_ = iota
+	PrecedenceLowest
+	PrecedenceAND
+	PrecedenceOR
+	PrecedenceCompare
+	PrecedenceHighest
+)
+
+var precidences = map[TokenType]int{
+	TokEQ:   PrecedenceCompare,
+	TokNEQ:  PrecedenceCompare,
+	TokLT:   PrecedenceCompare,
+	TokLE:   PrecedenceCompare,
+	TokGT:   PrecedenceCompare,
+	TokGE:   PrecedenceCompare,
+	TokLIKE: PrecedenceCompare,
+	TokOR:   PrecedenceOR,
+	TokAND:  PrecedenceAND,
+}
+
+type (
+	prefixParseFn func() Expression
+	infixParseFn  func(expression Expression) Expression
+)
+
+// Parser reads lexed values and builds an AST
+type Parser struct {
+	l      *Lexer
+	errors []string
+
+	curToken  Token
+	peekToken Token
+
+	prefixParseFns map[TokenType]prefixParseFn
+	infixParseFns  map[TokenType]infixParseFn
+}
+
+// NewParser returns a parser for a given lexer
+func NewParser(l *Lexer) *Parser {
+	p := &Parser{l: l}
+
+	p.prefixParseFns = make(map[TokenType]prefixParseFn)
+	p.registerPrefix(TokIdent, p.parseIdentifier)
+	p.registerPrefix(TokInteger, p.parseInteger)
+	p.registerPrefix(TokFloat, p.parseFloat)
+	p.registerPrefix(TokTRUE, p.parseBool)
+	p.registerPrefix(TokFALSE, p.parseBool)
+	p.registerPrefix(TokNULL, p.parseNull)
+	p.registerPrefix(TokString, p.parseString)
+	p.registerPrefix(TokLParen, p.parseGroupedExpression)
+	p.registerPrefix(TokLBracket, p.parseArray)
+
+	p.infixParseFns = make(map[TokenType]infixParseFn)
+	p.registerInfix(TokEQ, p.parseInfixExpression)
+	p.registerInfix(TokNEQ, p.parseInfixExpression)
+	p.registerInfix(TokLT, p.parseInfixExpression)
+	p.registerInfix(TokLE, p.parseInfixExpression)
+	p.registerInfix(TokGT, p.parseInfixExpression)
+	p.registerInfix(TokGE, p.parseInfixExpression)
+	p.registerInfix(TokLIKE, p.parseInfixExpression)
+	p.registerInfix(TokAND, p.parseInfixExpression)
+	p.registerInfix(TokOR, p.parseInfixExpression)
+
+	p.nextToken()
+	p.nextToken()
+
+	return p
+}
+
+// DefaultParse sets up a default lex/parse and returns the program
+func DefaultParse(in string) *Program {
+	args := make(map[string]string)
+	in, argstr, ok := strings.Cut(in, "|")
+	if ok {
+		for _, fd := range strings.Fields(argstr) {
+			a, b, _ := strings.Cut(fd, ":")
+			args[a] = b
+		}
+	}
+
+	l := NewLexer(in)
+	p := NewParser(l)
+	return p.ParseProgram(args)
+}
+
+func (p *Parser) registerPrefix(tokenType TokenType, fn prefixParseFn) {
+	p.prefixParseFns[tokenType] = fn
+}
+func (p *Parser) registerInfix(tokenType TokenType, fn infixParseFn) {
+	p.infixParseFns[tokenType] = fn
+}
+
+// Errors returns a list of errors while parsing
+func (p *Parser) Errors() []string {
+	return p.errors
+}
+func (p *Parser) peekError(t TokenType) {
+	msg := fmt.Sprintf("expected next token to be %s, got %s instad",
+		t, p.peekToken.Type)
+	p.errors = append(p.errors, msg)
+}
+
+func (p *Parser) nextToken() {
+	p.curToken = p.peekToken
+	p.peekToken = p.l.NextToken()
+}
+func (p *Parser) curTokenIs(t TokenType) bool {
+	return p.curToken.Type == t
+}
+func (p *Parser) peekTokenIs(t TokenType) bool {
+	return p.peekToken.Type == t
+}
+func (p *Parser) expectPeek(t TokenType) bool {
+	if p.peekTokenIs(t) {
+		p.nextToken()
+		return true
+	}
+	p.peekError(t)
+	return false
+}
+func (p *Parser) peekPrecedence() int {
+	if p, ok := precidences[p.peekToken.Type]; ok {
+		return p
+	}
+	return PrecedenceLowest
+}
+func (p *Parser) curPrecedence() int {
+	if p, ok := precidences[p.curToken.Type]; ok {
+		return p
+	}
+	return PrecedenceLowest
+}
+
+// ParseProgram builds a program AST from lexer
+func (p *Parser) ParseProgram(args map[string]string) *Program {
+	program := &Program{Args: args}
+	program.Statements = []Statement{}
+
+	for p.curToken.Type != TokEOF {
+		stmt := p.parseStatement()
+		if stmt != nil {
+			program.Statements = append(program.Statements, stmt)
+		}
+		p.nextToken()
+	}
+
+	return program
+}
+func (p *Parser) parseStatement() Statement {
+	switch p.curToken.Type {
+	default:
+		return p.parseExpressionStatement()
+	}
+}
+func (p *Parser) parseExpressionStatement() *ExpressionStatement {
+	stmt := &ExpressionStatement{Token: p.curToken}
+	stmt.Expression = p.parseExpression(PrecedenceLowest)
+
+	return stmt
+}
+func (p *Parser) parseExpression(precedence int) Expression {
+	prefix := p.prefixParseFns[p.curToken.Type]
+	if prefix == nil {
+		msg := fmt.Sprintf("no prefix parse function for %s found", p.curToken.Type)
+		p.errors = append(p.errors, msg)
+		return nil
+	}
+	leftExp := prefix()
+
+	for !p.peekTokenIs(TokEOF) && precedence < p.peekPrecedence() {
+		infix := p.infixParseFns[p.peekToken.Type]
+		if infix == nil {
+			return leftExp
+		}
+
+		p.nextToken()
+
+		leftExp = infix(leftExp)
+	}
+
+	return leftExp
+}
+func (p *Parser) parseIdentifier() Expression {
+	return &Identifier{Token: p.curToken, Value: p.curToken.Literal}
+}
+func (p *Parser) parseInteger() Expression {
+	lit := &Integer{Token: p.curToken}
+
+	value, err := strconv.ParseInt(p.curToken.Literal, 0, 64)
+	if err != nil {
+		msg := fmt.Sprintf("could not parse %q as integer", p.curToken.Literal)
+		p.errors = append(p.errors, msg)
+		return nil
+	}
+
+	lit.Value = value
+	return lit
+}
+func (p *Parser) parseFloat() Expression {
+	lit := &Float{Token: p.curToken}
+
+	value, err := strconv.ParseFloat(p.curToken.Literal, 64)
+	if err != nil {
+		msg := fmt.Sprintf("could not parse %q as float", p.curToken.Literal)
+		p.errors = append(p.errors, msg)
+		return nil
+	}
+
+	lit.Value = value
+	return lit
+}
+func (p *Parser) parseBool() Expression {
+	return &Bool{Token: p.curToken, Value: p.curTokenIs(TokTRUE)}
+}
+func (p *Parser) parseString() Expression {
+	s := p.curToken.Literal
+	s = strings.Replace(s, `\'`, `'`, -1)
+	s = strings.Replace(s, `\"`, `"`, -1)
+
+	return &String{Token: p.curToken, Value: s}
+}
+func (p *Parser) parseNull() Expression {
+	return &Null{Token: p.curToken}
+}
+func (p *Parser) parseArray() Expression {
+	array := &Array{Token: p.curToken}
+	array.Elements = p.parseExpressionList(TokRBracket)
+	return array
+}
+func (p *Parser) parseExpressionList(end TokenType) []Expression {
+	var list []Expression
+
+	if p.peekTokenIs(end) {
+		p.nextToken()
+		return list
+	}
+
+	p.nextToken()
+	list = append(list, p.parseExpression(PrecedenceHighest))
+	for p.peekTokenIs(TokOR) {
+		p.nextToken()
+		p.nextToken()
+		list = append(list, p.parseExpression(PrecedenceHighest))
+	}
+
+	if !p.expectPeek(end) {
+		return nil
+	}
+
+	return list
+}
+func (p *Parser) parseInfixExpression(left Expression) Expression {
+	expression := &InfixExpression{
+		Token:    p.curToken,
+		Left:     left,
+		Operator: p.curToken.Literal,
+	}
+
+	precidence := p.curPrecedence()
+	p.nextToken()
+	expression.Right = p.parseExpression(precidence)
+
+	return expression
+}
+func (p *Parser) parseGroupedExpression() Expression {
+	p.nextToken()
+
+	exp := p.parseExpression(PrecedenceLowest)
+
+	if !p.expectPeek(TokRParen) {
+		return nil
+	}
+
+	return exp
+}

rsql/parser_test.go

@@ -0,0 +1,309 @@
+package rsql
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/matryer/is"
+)
+
+func typeOf(t any) string { return fmt.Sprintf("%T", t) }
+
+func TestIdentifierExpression(t *testing.T) {
+	input := `foobar`
+
+	t.Run("Identifier Expressions", func(t *testing.T) {
+		is := is.New(t)
+
+		l := NewLexer(input)
+		p := NewParser(l)
+
+		program := p.ParseProgram(nil)
+		checkParserErrors(t, p)
+
+		is.Equal(len(program.Statements), 1)
+		// if len(program.Statements) != 1 {
+		// 	t.Fatalf("program has not envough statements. got=%d", len(program.Statements))
+		// }
+	})
+}
+
+func TestIntegerExpression(t *testing.T) {
+	input := `5`
+
+	t.Run("IntegerExpression", func(t *testing.T) {
+		is := is.New(t)
+
+		l := NewLexer(input)
+		p := NewParser(l)
+
+		program := p.ParseProgram(nil)
+		checkParserErrors(t, p)
+
+		is.Equal(len(program.Statements), 1)
+		// if len(program.Statements) != 1 {
+		// 	t.Fatalf("program has not enough statements. got=%d", len(program.Statements))
+		// }
+
+		stmt, ok := program.Statements[0].(*ExpressionStatement)
+		is.Equal(typeOf(program.Statements[0]), typeOf(&ExpressionStatement{}))
+		is.True(ok)
+		// if !ok {
+		// 	t.Fatalf("program.Statements[0] is not ExpressionStatement got=%T",
+		// 		program.Statements[0])
+		// }
+
+		literal, ok := stmt.Expression.(*Integer)
+		is.Equal(typeOf(literal), typeOf(&Integer{}))
+		is.True(ok)
+		// if !ok {
+		// 	t.Fatalf("stmt.Expression is not Integer got=%T",
+		// 		stmt.Expression)
+		// }
+
+		is.Equal(literal.Value, int64(5))
+		// if literal.Value != 5 {
+		// 	t.Errorf("literal.Value not %d. got=%d", 5, literal.Value)
+		// }
+
+		is.Equal(literal.TokenLiteral(), "5")
+		// if literal.TokenLiteral() != "5" {
+		// 	t.Errorf("literal.TokenLiteral not %v. got=%v", "5", literal.TokenLiteral())
+		// }
+	})
+}
+
+func TestInfixExpression(t *testing.T) {
+	tests := []struct {
+		input    string
+		left     string
+		operator string
+		right    int64
+	}{
+		{"foo == 1", "foo", "==", 1},
+		{"bar >  2", "bar", ">", 2},
+		{"bin <  3", "bin", "<", 3},
+		{"baz != 4", "baz", "!=", 4},
+		{"buf >= 5", "buf", ">=", 5},
+		{"goz <= 6", "goz", "<=", 6},
+	}
+	t.Run("Infix Expressions", func(t *testing.T) {
+		is := is.New(t)
+
+		for _, tt := range tests {
+			l := NewLexer(tt.input)
+			p := NewParser(l)
+			program := p.ParseProgram(nil)
+			checkParserErrors(t, p)
+
+			is.Equal(len(program.Statements), 1)
+			// if len(program.Statements) != 1 {
+			// 	t.Fatalf("program has not envough statements. got=%d", len(program.Statements))
+			// }
+
+			stmt, ok := program.Statements[0].(*ExpressionStatement)
+			is.Equal(typeOf(stmt), typeOf(&ExpressionStatement{}))
+			is.True(ok)
+			// if !ok {
+			// 	t.Fatalf("program.Statements[0] is not ExpressionStatement got=%T",
+			// 		program.Statements[0])
+			// }
+
+			exp, ok := stmt.Expression.(*InfixExpression)
+			is.Equal(typeOf(exp), typeOf(&InfixExpression{}))
+			is.True(ok)
+			// if !ok {
+			// 	t.Fatalf("stmt.Expression is not InfixExpression got=%T",
+			// 		stmt.Expression)
+			// }
+
+			if !testIdentifier(t, exp.Left, tt.left) {
+				return
+			}
+
+			is.Equal(exp.Operator, tt.operator)
+			// if exp.Operator != tt.operator {
+			// 	t.Fatalf("exp.Operator is not '%v'. got '%v'", tt.operator, exp.Operator)
+			// }
+
+			if testInteger(t, exp.Right, tt.right) {
+				return
+			}
+		}
+	})
+}
+
+func TestOperatorPrecedenceParsing(t *testing.T) {
+	tests := []struct {
+		input  string
+		expect string
+	}{
+		{
+			"foo == 1; bar == 2.0",
+			"((foo==1);(bar==2.0))",
+		},
+		{
+			`director=='name\'s';actor=eq="name\'s";Year=le=2000,Year>=2010;one <= -1.0, two != true`,
+			`((((director=="name's");(actor=eq="name's"));((Year=le=2000),(Year>=2010)));((one<=-1.0),(two!=true)))`,
+		},
+	}
+	t.Run("Operator Precidence Parsing", func(t *testing.T) {
+		is := is.New(t)
+
+		for _, tt := range tests {
+			l := NewLexer(tt.input)
+			p := NewParser(l)
+			program := p.ParseProgram(nil)
+			checkParserErrors(t, p)
+
+			actual := program.String()
+			is.Equal(actual, tt.expect)
+			// if actual != tt.expect {
+			// 	t.Errorf("expcected=%q, got=%q", tt.expect, actual)
+			// }
+		}
+	})
+}
+
+func TestParsingArray(t *testing.T) {
+	input := "[1, 2.1, true, null]"
+
+	l := NewLexer(input)
+	p := NewParser(l)
+	program := p.ParseProgram(nil)
+	checkParserErrors(t, p)
+
+	if len(program.Statements) != 1 {
+		t.Fatalf("program has not enough statements. got=%d", len(program.Statements))
+	}
+
+	stmt, ok := program.Statements[0].(*ExpressionStatement)
+	if !ok {
+		t.Fatalf("program.Statements[0] is not ExpressionStatement got=%T",
+			program.Statements[0])
+	}
+
+	array, ok := stmt.Expression.(*Array)
+	if !ok {
+		t.Fatalf("stmt.Expression is not Array got=%T",
+			stmt.Expression)
+	}
+
+	if len(array.Elements) != 4 {
+		t.Fatalf("len(array.Elements) not 4. got=%v", len(array.Elements))
+	}
+
+	testInteger(t, array.Elements[0], 1)
+	testFloat(t, array.Elements[1], 2.1)
+	testBool(t, array.Elements[2], true)
+	testNull(t, array.Elements[3])
+}
+
+func checkParserErrors(t *testing.T, p *Parser) {
+	errors := p.Errors()
+	if len(errors) == 0 {
+		return
+	}
+
+	t.Errorf("parser has %d errors", len(errors))
+	for _, msg := range errors {
+		t.Errorf("parser error: %q", msg)
+	}
+	t.FailNow()
+}
+
+func testInteger(t *testing.T, e Expression, value int64) bool {
+	literal, ok := e.(*Integer)
+	if !ok {
+		t.Errorf("stmt.Expression is not Integer got=%T", e)
+		return false
+	}
+
+	if literal.Value != value {
+		t.Errorf("literal.Value not %d. got=%d", value, literal.Value)
+		return false
+	}
+
+	if literal.TokenLiteral() != fmt.Sprintf("%v", value) {
+		t.Errorf("literal.TokenLiteral not %v. got=%v", value, literal.TokenLiteral())
+		return false
+	}
+
+	return true
+}
+func testFloat(t *testing.T, e Expression, value float64) bool {
+	literal, ok := e.(*Float)
+	if !ok {
+		t.Errorf("stmt.Expression is not Float got=%T", e)
+		return false
+	}
+
+	if literal.Value != value {
+		t.Errorf("literal.Value not %f. got=%f", value, literal.Value)
+		return false
+	}
+
+	if literal.TokenLiteral() != fmt.Sprintf("%v", value) {
+		t.Errorf("literal.TokenLiteral not %q. got=%q", fmt.Sprintf("%v", value), literal.TokenLiteral())
+		return false
+	}
+
+	return true
+}
+func testBool(t *testing.T, e Expression, value bool) bool {
+	literal, ok := e.(*Bool)
+	if !ok {
+		t.Errorf("stmt.Expression is not Float got=%T", e)
+		return false
+	}
+
+	if literal.Value != value {
+		t.Errorf("literal.Value not %t. got=%t", value, literal.Value)
+		return false
+	}
+
+	if literal.TokenLiteral() != fmt.Sprintf("%v", value) {
+		t.Errorf("literal.TokenLiteral not %v. got=%v", value, literal.TokenLiteral())
+		return false
+	}
+
+	return true
+}
+func testNull(t *testing.T, e Expression) bool {
+	literal, ok := e.(*Null)
+	if !ok {
+		t.Errorf("stmt.Expression is not Null got=%T", e)
+		return false
+	}
+	if literal.Token.Type != TokNULL {
+		t.Errorf("liternal.Token is not TokNULL got=%T", e)
+		return false
+	}
+
+	return true
+}
+func testIdentifier(t *testing.T, e Expression, value string) bool {
+	literal, ok := e.(*Identifier)
+	if !ok {
+		t.Errorf("stmt.Expression is not Integer got=%T", e)
+		return false
+	}
+
+	if literal.Value != value {
+		t.Errorf("literal.Value not %s. got=%s", value, literal.Value)
+		return false
+	}
+
+	if literal.TokenLiteral() != value {
+		t.Errorf("literal.TokenLiteral not %v. got=%v", value, literal.TokenLiteral())
+		return false
+	}
+
+	return true
+}
+
+func TestReplace(t *testing.T) {
+	is := is.New(t)
+	is.Equal(strings.Replace(`name\'s`, `\'`, `'`, -1), `name's`)
+}

rsql/squirrel/sqlizer.go

@@ -0,0 +1,300 @@
+package squirrel
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/Masterminds/squirrel"
+	"go.sour.is/pkg/rsql"
+)
+
+type dbInfo interface {
+	Col(string) (string, error)
+}
+
+type args map[string]string
+
+func (d *decoder) mkArgs(a args) args {
+	m := make(args, len(a))
+	for k, v := range a {
+		if k == "limit" || k == "offset" {
+			m[k] = v
+			continue
+		}
+
+		var err error
+		if k, err = d.dbInfo.Col(k); err == nil {
+			m[k] = v
+
+		}
+	}
+
+	return m
+}
+
+func (a args) Limit() (uint64, bool) {
+	if a == nil {
+		return 0, false
+	}
+	if v, ok := a["limit"]; ok {
+		i, err := strconv.ParseUint(v, 10, 64)
+		return i, err == nil
+	}
+
+	return 0, false
+}
+func (a args) Offset() (uint64, bool) {
+	if a == nil {
+		return 0, false
+	}
+	if v, ok := a["offset"]; ok {
+		i, err := strconv.ParseUint(v, 10, 64)
+		return i, err == nil
+	}
+
+	return 0, false
+}
+func (a args) Order() []string {
+	var lis []string
+
+	for k, v := range a {
+		if k == "limit" || k == "offset" {
+			continue
+		}
+		lis = append(lis, k+" "+v)
+	}
+
+	return lis
+}
+
+func Query(in string, db dbInfo) (squirrel.Sqlizer, args, error) {
+	d := decoder{dbInfo: db}
+	program := rsql.DefaultParse(in)
+	sql, err := d.decode(program)
+	return sql, d.mkArgs(program.Args), err
+}
+
+type decoder struct {
+	dbInfo dbInfo
+}
+
+func (db *decoder) decode(in *rsql.Program) (squirrel.Sqlizer, error) {
+	switch len(in.Statements) {
+	case 0:
+		return nil, nil
+	case 1:
+		return db.decodeStatement(in.Statements[0])
+	default:
+		a := squirrel.And{}
+		for _, stmt := range in.Statements {
+			d, err := db.decodeStatement(stmt)
+			if d == nil {
+				return nil, err
+			}
+
+			a = append(a, d)
+		}
+		return a, nil
+	}
+}
+func (db *decoder) decodeStatement(in rsql.Statement) (squirrel.Sqlizer, error) {
+	switch s := in.(type) {
+	case *rsql.ExpressionStatement:
+		return db.decodeExpression(s.Expression)
+	}
+	return nil, nil
+}
+func (db *decoder) decodeExpression(in rsql.Expression) (squirrel.Sqlizer, error) {
+	switch e := in.(type) {
+	case *rsql.InfixExpression:
+		return db.decodeInfix(e)
+	}
+	return nil, nil
+}
+func (db *decoder) decodeInfix(in *rsql.InfixExpression) (squirrel.Sqlizer, error) {
+
+	switch in.Token.Type {
+	case rsql.TokAND:
+		a := squirrel.And{}
+		left, err := db.decodeExpression(in.Left)
+		if err != nil {
+			return nil, err
+		}
+
+		switch v := left.(type) {
+		case squirrel.And:
+			for _, el := range v {
+				if el != nil {
+					a = append(a, el)
+				}
+			}
+
+		default:
+			if v != nil {
+				a = append(a, v)
+			}
+		}
+
+		right, err := db.decodeExpression(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		switch v := right.(type) {
+		case squirrel.And:
+			for _, el := range v {
+				if el != nil {
+					a = append(a, el)
+				}
+			}
+
+		default:
+			if v != nil {
+				a = append(a, v)
+			}
+		}
+
+		return a, nil
+	case rsql.TokOR:
+		left, err := db.decodeExpression(in.Left)
+		if err != nil {
+			return nil, err
+		}
+		right, err := db.decodeExpression(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		return squirrel.Or{left, right}, nil
+	case rsql.TokEQ:
+		col, err := db.dbInfo.Col(in.Left.String())
+		if err != nil {
+			return nil, err
+		}
+		v, err := db.decodeValue(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		return squirrel.Eq{col: v}, nil
+	case rsql.TokLIKE:
+		col, err := db.dbInfo.Col(in.Left.String())
+		if err != nil {
+			return nil, err
+		}
+
+		v, err := db.decodeValue(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		switch value := v.(type) {
+		case string:
+			return Like{col, strings.Replace(value, "*", "%", -1)}, nil
+		default:
+			return nil, fmt.Errorf("LIKE requires a string value")
+		}
+
+	case rsql.TokNEQ:
+		col, err := db.dbInfo.Col(in.Left.String())
+		if err != nil {
+			return nil, err
+		}
+		v, err := db.decodeValue(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		return squirrel.NotEq{col: v}, nil
+	case rsql.TokGT:
+		col, err := db.dbInfo.Col(in.Left.String())
+		if err != nil {
+			return nil, err
+		}
+		v, err := db.decodeValue(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		return squirrel.Gt{col: v}, nil
+	case rsql.TokGE:
+		col, err := db.dbInfo.Col(in.Left.String())
+		if err != nil {
+			return nil, err
+		}
+		v, err := db.decodeValue(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		return squirrel.GtOrEq{col: v}, nil
+	case rsql.TokLT:
+		col, err := db.dbInfo.Col(in.Left.String())
+		if err != nil {
+			return nil, err
+		}
+		v, err := db.decodeValue(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		return squirrel.Lt{col: v}, nil
+	case rsql.TokLE:
+		col, err := db.dbInfo.Col(in.Left.String())
+		if err != nil {
+			return nil, err
+		}
+		v, err := db.decodeValue(in.Right)
+		if err != nil {
+			return nil, err
+		}
+
+		return squirrel.LtOrEq{col: v}, nil
+	default:
+		return nil, nil
+	}
+}
+func (db *decoder) decodeValue(in rsql.Expression) (interface{}, error) {
+	switch v := in.(type) {
+	case *rsql.Array:
+		var values []interface{}
+		for _, el := range v.Elements {
+			v, err := db.decodeValue(el)
+			if err != nil {
+				return nil, err
+			}
+
+			values = append(values, v)
+		}
+
+		return values, nil
+	case *rsql.InfixExpression:
+		return db.decodeInfix(v)
+	case *rsql.Identifier:
+		return v.Value, nil
+	case *rsql.Integer:
+		return v.Value, nil
+	case *rsql.Float:
+		return v.Value, nil
+	case *rsql.String:
+		return v.Value, nil
+	case *rsql.Bool:
+		return v.Value, nil
+	case *rsql.Null:
+		return nil, nil
+	}
+
+	return nil, nil
+}
+
+type Like struct {
+	column string
+	value  string
+}
+
+func (l Like) ToSql() (sql string, args []interface{}, err error) {
+	sql = fmt.Sprintf("%s LIKE(?)", l.column)
+	args = append(args, l.value)
+	return
+}

rsql/squirrel/sqlizer_test.go

@@ -0,0 +1,141 @@
+package squirrel
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/Masterminds/squirrel"
+	"github.com/matryer/is"
+	"go.sour.is/pkg/rsql"
+)
+
+type testTable struct {
+	Foo      string `json:"foo"`
+	Bar      string `json:"bar"`
+	Baz      string `json:"baz"`
+	Director string `json:"director"`
+	Actor    string `json:"actor"`
+	Year     string `json:"year"`
+	Genres   string `json:"genres"`
+	One      string `json:"one"`
+	Two      string `json:"two"`
+	Family   string `json:"family_name"`
+}
+
+func TestQuery(t *testing.T) {
+	d := rsql.GetDbColumns(testTable{})
+	is := is.New(t)
+
+	tests := []struct {
+		input        string
+		expect       squirrel.Sqlizer
+		expectLimit  *uint64
+		expectOffset *uint64
+		expectOrder  []string
+		fail         bool
+	}{
+		{input: "foo==[1, 2, 3]", expect: squirrel.Eq{"foo": []interface{}{1, 2, 3}}},
+		{input: "foo==1,(bar==2;baz==3)", expect: squirrel.Or{squirrel.Eq{"foo": 1}, squirrel.And{squirrel.Eq{"bar": 2}, squirrel.Eq{"baz": 3}}}},
+
+		{input: "foo==1", expect: squirrel.Eq{"foo": 1}},
+		{input: "foo!=1.1", expect: squirrel.NotEq{"foo": 1.1}},
+		{input: "foo==true", expect: squirrel.Eq{"foo": true}},
+		{input: "foo==null", expect: squirrel.Eq{"foo": nil}},
+		{input: "foo>2", expect: squirrel.Gt{"foo": 2}},
+		{input: "foo>=2.1", expect: squirrel.GtOrEq{"foo": 2.1}},
+		{input: "foo<3", expect: squirrel.Lt{"foo": 3}},
+		{input: "foo<=3.1", expect: squirrel.LtOrEq{"foo": 3.1}},
+
+		{input: "foo=eq=1", expect: squirrel.Eq{"foo": 1}},
+		{input: "foo=neq=1.1", expect: squirrel.NotEq{"foo": 1.1}},
+		{input: "foo=gt=2", expect: squirrel.Gt{"foo": 2}},
+		{input: "foo=ge=2.1", expect: squirrel.GtOrEq{"foo": 2.1}},
+		{input: "foo=lt=3", expect: squirrel.Lt{"foo": 3}},
+		{input: "foo=le=3.1", expect: squirrel.LtOrEq{"foo": 3.1}},
+
+		{input: "foo==1;bar==2", expect: squirrel.And{squirrel.Eq{"foo": 1}, squirrel.Eq{"bar": 2}}},
+		{input: "foo==1,bar==2", expect: squirrel.Or{squirrel.Eq{"foo": 1}, squirrel.Eq{"bar": 2}}},
+		{input: "foo==1,bar==2;baz=3", expect: nil},
+		{
+			input: `director=='name\'s';actor=eq="name\'s";Year=le=2000,Year>=2010;one <= -1.0, two != true`,
+			expect: squirrel.And{
+				squirrel.Eq{"director": "name's"},
+				squirrel.Eq{"actor": "name's"},
+				squirrel.Or{
+					squirrel.LtOrEq{"year": 2000},
+					squirrel.GtOrEq{"year": 2010},
+				},
+				squirrel.Or{
+					squirrel.LtOrEq{"one": -1.0},
+					squirrel.NotEq{"two": true},
+				},
+			},
+		},
+		{
+			input: `genres==[sci-fi,action] ; genres==[romance,animated,horror] , director~Que*Tarantino`,
+			expect: squirrel.And{
+				squirrel.Eq{"genres": []interface{}{"sci-fi", "action"}},
+				squirrel.Or{
+					squirrel.Eq{"genres": []interface{}{"romance", "animated", "horror"}},
+					Like{"director", "Que%Tarantino"},
+				},
+			},
+		},
+		{input: "", expect: nil},
+		{input: "family_name==LUNDY", expect: squirrel.Eq{"family_name": "LUNDY"}},
+		{input: "family_name==[1,2,null]", expect: squirrel.Eq{"family_name": []interface{}{1, 2, nil}}},
+		{input: "family_name=LUNDY", expect: nil},
+		{input: "family_name==LUNDY and family_name==SMITH", expect: squirrel.And{squirrel.Eq{"family_name": "LUNDY"}, squirrel.Eq{"family_name": "SMITH"}}},
+		{input: "family_name==LUNDY or family_name==SMITH", expect: squirrel.Or{squirrel.Eq{"family_name": "LUNDY"}, squirrel.Eq{"family_name": "SMITH"}}},
+		{input: "foo==1,family_name=LUNDY;baz==2", expect: nil},
+		{input: "foo ~ bar*", expect: Like{"foo", "bar%"}},
+		{input: "foo ~ [bar*,bin*]", expect: nil, fail: true},
+		{input: "foo==1|limit:10", expect: squirrel.Eq{"foo": 1}, expectLimit: ptr(uint64(10))},
+		{input: "foo==1|offset:2", expect: squirrel.Eq{"foo": 1}, expectOffset: ptr(uint64(2))},
+		{
+			input: "foo>=1|limit:10 offset:2 foo:desc", 
+			expect: squirrel.GtOrEq{"foo": 1}, 
+			expectLimit: ptr(uint64(10)),
+			expectOffset: ptr(uint64(2)),
+			expectOrder: []string{"foo desc"},
+		},
+	}
+
+	for i, tt := range tests {
+		q, a, err := Query(tt.input, d)
+		if !tt.fail && err != nil {
+			t.Error(err)
+		}
+		if q != nil {
+			t.Log(q.ToSql())
+		}
+
+		actual := fmt.Sprintf("%#v", q)
+		expect := fmt.Sprintf("%#v", tt.expect)
+		if expect != actual {
+			t.Errorf("test[%d]: %v\n\tinput and expected are not the same. wanted=%s got=%s", i, tt.input, expect, actual)
+		}
+
+		if limit, ok := a.Limit(); tt.expectLimit != nil {
+			is.True(ok)
+			is.Equal(limit, *tt.expectLimit)
+		} else {
+			is.True(!ok)
+		}
+
+		if offset, ok := a.Offset(); tt.expectOffset != nil {
+			is.True(ok)
+			is.Equal(offset, *tt.expectOffset)
+		} else {
+			is.True(!ok)
+		}
+
+		if order := a.Order(); tt.expectOrder != nil {
+			is.Equal(order, tt.expectOrder)
+		} else {
+			is.Equal(len(order), 0)
+		}
+	}
+}
+
+func ptr[T any](t T) *T { return &t }

rsql/token.go

@@ -0,0 +1,62 @@
+package rsql
+
+// Tokens for RSQL FIQL
+const (
+	TokIllegal = "TokIllegal"
+	TokEOF     = "TokEOF"
+
+	TokIdent   = "TokIdent"
+	TokInteger = "TokInteger"
+	TokString  = "TokString"
+	TokFloat   = "TokFloat"
+	TokExtend  = "TokExtend"
+
+	TokLParen = "("
+	TokRParen = ")"
+
+	TokLBracket = "["
+	TokRBracket = "]"
+
+	TokLIKE = "~"
+	TokNLIKE= "!~"
+	TokNOT  = "!"
+	TokLT   = "<"
+	TokGT   = ">"
+	TokLE   = "<="
+	TokGE   = ">="
+	TokEQ   = "=="
+	TokNEQ  = "!="
+	TokAND  = ";"
+	TokOR   = ","
+
+	TokTRUE  =  "true"
+	TokFALSE = "false"
+	TokNULL  = "null"
+)
+
+var keywords = map[string]TokenType {
+	"true":  TokTRUE,
+	"false": TokFALSE,
+	"null":  TokNULL,
+	"and":   TokAND,
+	"or":    TokOR,
+}
+
+// TokenType is a token enumeration
+type TokenType string
+// Token is a type and literal pair
+type Token struct {
+	Type    TokenType
+	Literal string
+}
+
+func newToken(tokenType TokenType, ch rune) Token {
+	return Token{Type: tokenType, Literal: string(ch)}
+}
+
+func lookupIdent(ident string) TokenType {
+	if tok, ok := keywords[ident]; ok {
+		return tok
+	}
+	return TokIdent
+}

service/service.go

@@ -35,10 +35,11 @@ func (s *Harness) Setup(ctx context.Context, apps ...application) error {
 	ctx, span := lg.Span(ctx)
 	defer span.End()
 
+	s.onRunning = make(chan struct{})
+
 	// setup crontab
 	c := cron.New(cron.DefaultGranularity)
 	s.OnStart(c.Run)
-	s.onRunning = make(chan struct{})
 	s.crontab = c
 
 	var err error

set/set.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"go.sour.is/pkg/math"
+	"golang.org/x/exp/maps"
 )
 
 type Set[T comparable] map[T]struct{}
@@ -33,6 +34,9 @@ func (s Set[T]) Delete(items ...T) Set[T] {
 	}
 	return s
 }
+func (s Set[T]) Values() []T {
+	return maps.Keys(s)
+}
 
 func (s Set[T]) Equal(e Set[T]) bool {
 	for k := range s {

xdg/xdg.go

@@ -4,6 +4,7 @@
 package xdg
 
 import (
+	"errors"
 	"os"
 	"path/filepath"
 	"strings"
@@ -36,6 +37,9 @@ func setENV(name, value string) string {
 	return literal(name)
 }
 func Get(base, suffix string) string {
+	return strings.Join(paths(base, suffix), string(os.PathListSeparator))
+}
+func paths(base, suffix string) []string {
 	paths := strings.Split(os.ExpandEnv(base), string(os.PathListSeparator))
 	for i, path := range paths {
 		if strings.HasPrefix(path, "~") {
@@ -43,7 +47,17 @@ func Get(base, suffix string) string {
 		}
 		paths[i] = os.ExpandEnv(filepath.Join(path, suffix))
 	}
-	return strings.Join(paths, string(os.PathListSeparator))
+	return paths
+}
+func Find(base, filename string) []string {
+	var files []string
+	for _, f := range paths(base, filename) {
+		if ok, _ := exists(f); !ok {
+			continue
+		}
+		files = append(files, f)
+	}
+	return files
 }
 
 func getHome() string {
@@ -53,3 +67,17 @@ func getHome() string {
 	}
 	return home
 }
+
+func exists(name string) (bool, error) {
+	s, err := os.Stat(name)
+	if err == nil {
+		return true, nil
+	}
+	if errors.Is(err, os.ErrNotExist) {
+		return false, nil
+	}
+	if s.IsDir() {
+		return false, nil
+	}
+	return false, err
+}