feat: add database non full text index (close #2916)

internal/search/db_non_full_text/init.go

@@ -0,0 +1,16 @@
+package db
+
+import (
+	"github.com/alist-org/alist/v3/internal/search/searcher"
+)
+
+var config = searcher.Config{
+	Name:       "database_non_full_text",
+	AutoUpdate: true,
+}
+
+func init() {
+	searcher.RegisterSearcher(config, func() (searcher.Searcher, error) {
+		return &DB{}, nil
+	})
+}

internal/search/db_non_full_text/search.go

@@ -0,0 +1,45 @@
+package db
+
+import (
+	"context"
+
+	"github.com/alist-org/alist/v3/internal/db"
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/internal/search/searcher"
+)
+
+type DB struct{}
+
+func (D DB) Config() searcher.Config {
+	return config
+}
+
+func (D DB) Search(ctx context.Context, req model.SearchReq) ([]model.SearchNode, int64, error) {
+	return db.SearchNode(req, false)
+}
+
+func (D DB) Index(ctx context.Context, node model.SearchNode) error {
+	return db.CreateSearchNode(&node)
+}
+
+func (D DB) BatchIndex(ctx context.Context, nodes []model.SearchNode) error {
+	return db.BatchCreateSearchNodes(&nodes)
+}
+
+func (D DB) Get(ctx context.Context, parent string) ([]model.SearchNode, error) {
+	return db.GetSearchNodesByParent(parent)
+}
+
+func (D DB) Del(ctx context.Context, prefix string) error {
+	return db.DeleteSearchNodesByParent(prefix)
+}
+
+func (D DB) Release(ctx context.Context) error {
+	return nil
+}
+
+func (D DB) Clear(ctx context.Context) error {
+	return db.ClearSearchNodes()
+}
+
+var _ searcher.Searcher = (*DB)(nil)