bring in khatru and eventstore.

eventstore/bluge/lib.go

@@ -0,0 +1,52 @@
+package bluge
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/blugelabs/bluge"
+	"github.com/blugelabs/bluge/analysis/token"
+	"github.com/fiatjaf/eventstore"
+	"golang.org/x/text/unicode/norm"
+)
+
+var _ eventstore.Store = (*BlugeBackend)(nil)
+
+type BlugeBackend struct {
+	sync.Mutex
+	// Path is where the index will be saved
+	Path string
+
+	// RawEventStore is where we'll fetch the raw events from
+	// bluge will only store ids, so the actual events must be somewhere else
+	RawEventStore eventstore.Store
+
+	searchConfig bluge.Config
+	writer       *bluge.Writer
+}
+
+func (b *BlugeBackend) Close() {
+	defer b.writer.Close()
+}
+
+func (b *BlugeBackend) Init() error {
+	if b.Path == "" {
+		return fmt.Errorf("missing Path")
+	}
+	if b.RawEventStore == nil {
+		return fmt.Errorf("missing RawEventStore")
+	}
+
+	b.searchConfig = bluge.DefaultConfig(b.Path)
+	b.searchConfig.DefaultSearchAnalyzer.TokenFilters = append(b.searchConfig.DefaultSearchAnalyzer.TokenFilters,
+		token.NewUnicodeNormalizeFilter(norm.NFKC),
+	)
+
+	var err error
+	b.writer, err = bluge.OpenWriter(b.searchConfig)
+	if err != nil {
+		return fmt.Errorf("error opening writer: %w", err)
+	}
+
+	return nil
+}