add: chat service

app/chat/rpc/internal/logic/searchChatSessionsLogic.go

@@ -0,0 +1,65 @@
+package logic
+
+import (
+	"context"
+
+	"juwan-backend/app/chat/rpc/internal/svc"
+	"juwan-backend/app/chat/rpc/pb"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type SearchChatSessionsLogic struct {
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+	logx.Logger
+}
+
+func NewSearchChatSessionsLogic(ctx context.Context, svcCtx *svc.ServiceContext) *SearchChatSessionsLogic {
+	return &SearchChatSessionsLogic{
+		ctx:    ctx,
+		svcCtx: svcCtx,
+		Logger: logx.WithContext(ctx),
+	}
+}
+
+func (l *SearchChatSessionsLogic) SearchChatSessions(in *pb.SearchChatSessionsReq) (*pb.SearchChatSessionsResp, error) {
+	store := l.svcCtx.Store
+	store.Mu.RLock()
+	defer store.Mu.RUnlock()
+
+	var results []*pb.ChatSessions
+	for _, s := range store.Sessions {
+		if in.Type != nil && s.Type != *in.Type {
+			continue
+		}
+		if in.UserId != nil {
+			found := false
+			for _, p := range s.Participants {
+				if p == *in.UserId {
+					found = true
+					break
+				}
+			}
+			if !found {
+				continue
+			}
+		}
+		results = append(results, s)
+	}
+
+	limit := in.GetLimit()
+	if limit <= 0 {
+		limit = 20
+	}
+	offset := in.GetPage() * limit
+	if offset >= int64(len(results)) {
+		return &pb.SearchChatSessionsResp{}, nil
+	}
+	end := offset + limit
+	if end > int64(len(results)) {
+		end = int64(len(results))
+	}
+
+	return &pb.SearchChatSessionsResp{ChatSessions: results[offset:end]}, nil
+}