errcode

pkg/common/db/localcache/group.go

@@ -1,6 +1,7 @@
 package localcache
 
 import (
+	"Open_IM/pkg/common/constant"
 	"Open_IM/pkg/proto/group"
 	"context"
 	"google.golang.org/grpc"
@@ -27,12 +28,31 @@ func NewGroupMemberIDsLocalCache(rpc *grpc.ClientConn) GroupLocalCache {
 	}
 }
 
-func (g *GroupLocalCache) GetGroupMemberIDs(ctx context.Context, groupID string) []string {
+func (g *GroupLocalCache) GetGroupMemberIDs(ctx context.Context, groupID string) ([]string, error) {
+	g.lock.Lock()
+	defer g.lock.Unlock()
 	resp, err := g.group.GetGroupAbstractInfo(ctx, &group.GetGroupAbstractInfoReq{
-		GroupIDs: nil,
+		GroupIDs: []string{groupID},
 	})
 	if err != nil {
-		return nil
+		return nil, err
 	}
-	return []string{}
+	if len(resp.GroupAbstractInfos) < 0 {
+		return nil, constant.ErrGroupIDNotFound
+	}
+	localHashInfo, ok := g.cache[groupID]
+	if ok && localHashInfo.memberListHash == resp.GroupAbstractInfos[0].GroupMemberListHash {
+		return localHashInfo.userIDs, nil
+	}
+	groupMembersResp, err := g.group.GetGroupMemberList(ctx, &group.GetGroupMemberListReq{
+		GroupID: groupID,
+	})
+	if err != nil {
+		return nil, err
+	}
+	g.cache[groupID] = GroupMemberIDsHash{
+		memberListHash: resp.GroupAbstractInfos[0].GroupMemberListHash,
+		userIDs:        groupMembersResp.Members,
+	}
+	return g.cache[groupID].userIDs, nil
 }