feat: local cache

pkg/localcache/option.go

@@ -107,15 +107,6 @@ func WithDeleteKeyBefore(fn func(ctx context.Context, key ...string)) Option {
 	}
 }
 
-func WithDeleteLocal(fn func(fn func(key ...string))) Option {
-	if fn == nil {
-		panic("fn should not be nil")
-	}
-	return func(o *option) {
-		o.delCh = fn
-	}
-}
-
 type emptyTarget struct{}
 
 func (e emptyTarget) IncrGetHit() {}

pkg/rpccache/group.go

@@ -24,8 +24,43 @@ type GroupLocalCache struct {
 	local  localcache.Cache[any]
 }
 
-func (g *GroupLocalCache) GetGroupMemberIDs(ctx context.Context, groupID string) ([]string, error) {
-	return localcache.AnyValue[[]string](g.local.Get(ctx, cachekey.GetGroupMemberIDsKey(groupID), func(ctx context.Context) (any, error) {
-		return g.client.GetGroupMemberIDs(ctx, groupID)
+type listMap[V comparable] struct {
+	List []V
+	Map  map[V]struct{}
+}
+
+func newListMap[V comparable](values []V, err error) (*listMap[V], error) {
+	if err != nil {
+		return nil, err
+	}
+	lm := &listMap[V]{
+		List: values,
+		Map:  make(map[V]struct{}, len(values)),
+	}
+	for _, value := range values {
+		lm.Map[value] = struct{}{}
+	}
+	return lm, nil
+}
+
+func (g *GroupLocalCache) getGroupMemberIDs(ctx context.Context, groupID string) (*listMap[string], error) {
+	return localcache.AnyValue[*listMap[string]](g.local.Get(ctx, cachekey.GetGroupMemberIDsKey(groupID), func(ctx context.Context) (any, error) {
+		return newListMap(g.client.GetGroupMemberIDs(ctx, groupID))
 	}))
 }
+
+func (g *GroupLocalCache) GetGroupMemberIDs(ctx context.Context, groupID string) ([]string, error) {
+	res, err := g.getGroupMemberIDs(ctx, groupID)
+	if err != nil {
+		return nil, err
+	}
+	return res.List, nil
+}
+
+func (g *GroupLocalCache) GetGroupMemberIDMap(ctx context.Context, groupID string) (map[string]struct{}, error) {
+	res, err := g.getGroupMemberIDs(ctx, groupID)
+	if err != nil {
+		return nil, err
+	}
+	return res.Map, nil
+}