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