chore: add apps from go.sour.is/ev

cmd/ev/app.webfinger.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/patrickmn/go-cache"
+
+	"go.sour.is/ev"
+	"go.sour.is/tools/app/webfinger"
+	"go.sour.is/pkg/env"
+	"go.sour.is/pkg/lg"
+	"go.sour.is/pkg/service"
+	"go.sour.is/pkg/slice"
+)
+
+var (
+	defaultExpire   = 3 * time.Minute
+	cleanupInterval = 10 * time.Minute
+)
+
+var _ = apps.Register(50, func(ctx context.Context, svc *service.Harness) error {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	span.AddEvent("Enable WebFinger")
+	eventstore, ok := slice.Find[*ev.EventStore](svc.Services...)
+	if !ok {
+		return fmt.Errorf("*es.EventStore not found in services")
+	}
+
+	cache := cache.New(defaultExpire, cleanupInterval)
+	var withCache webfinger.WithCache = (func(s string) bool {
+		if _, ok := cache.Get(s); ok {
+			return true
+		}
+		cache.SetDefault(s, true)
+		return false
+	})
+	var withHostnames webfinger.WithHostnames = strings.Fields(env.Default("WEBFINGER_DOMAINS", "sour.is"))
+
+	wf, err := webfinger.New(ctx, eventstore, withCache, withHostnames)
+	if err != nil {
+		span.RecordError(err)
+		return err
+	}
+	svc.Add(wf)
+
+	return nil
+})