refactor: update repository interfaces and improve dependency injection

- Refactored repository structures to use interfaces instead of concrete types, enhancing flexibility and testability.
- Updated various repository methods to accept interfaces, allowing for better dependency management.
- Modified wire generation to accommodate new repository interfaces, ensuring proper service injection throughout the application.
- Enhanced handler methods to utilize DTOs for filtering and data handling, improving code clarity and maintainability.

internal/service/group_service.go

@@ -106,25 +106,23 @@ type GroupMembersResult struct {
 
 // groupService 群组服务实现
 type groupService struct {
-	db          *gorm.DB
 	groupRepo   repository.GroupRepository
-	userRepo    *repository.UserRepository
-	messageRepo *repository.MessageRepository
+	userRepo    repository.UserRepository
+	messageRepo repository.MessageRepository
 	requestRepo repository.GroupJoinRequestRepository
-	notifyRepo  *repository.SystemNotificationRepository
+	notifyRepo  repository.SystemNotificationRepository
 	sseHub      *sse.Hub
 	cache       cache.Cache
 }
 
 // NewGroupService 创建群组服务
-func NewGroupService(db *gorm.DB, groupRepo repository.GroupRepository, userRepo *repository.UserRepository, messageRepo *repository.MessageRepository, sseHub *sse.Hub, cacheBackend cache.Cache) GroupService {
+func NewGroupService(groupRepo repository.GroupRepository, userRepo repository.UserRepository, messageRepo repository.MessageRepository, requestRepo repository.GroupJoinRequestRepository, notifyRepo repository.SystemNotificationRepository, sseHub *sse.Hub, cacheBackend cache.Cache) GroupService {
 	return &groupService{
-		db:          db,
 		groupRepo:   groupRepo,
 		userRepo:    userRepo,
 		messageRepo: messageRepo,
-		requestRepo: repository.NewGroupJoinRequestRepository(db),
-		notifyRepo:  repository.NewSystemNotificationRepository(db),
+		requestRepo: requestRepo,
+		notifyRepo:  notifyRepo,
 		sseHub:      sseHub,
 		cache:       cacheBackend,
 	}
@@ -263,43 +261,17 @@ func (s *groupService) CreateGroup(ownerID string, name string, description stri
 		GroupID: &group.ID,
 	}
 
-	// 在事务中创建会话和参与者
-	err = s.db.Transaction(func(tx *gorm.DB) error {
-		// 创建会话
-		if err := tx.Create(conversation).Error; err != nil {
-			return err
+	// 收集所有参与者
+	participants := make([]string, 0, len(memberIDs)+1)
+	participants = append(participants, ownerID)
+	for _, memberID := range memberIDs {
+		if memberID != ownerID {
+			participants = append(participants, memberID)
 		}
+	}
 
-		// 添加群主为会话参与者
-		ownerParticipant := model.ConversationParticipant{
-			ConversationID: conversation.ID,
-			UserID:         ownerID,
-			LastReadSeq:    0,
-		}
-		if err := tx.Create(&ownerParticipant).Error; err != nil {
-			return err
-		}
-
-		// 添加被邀请的成员为会话参与者
-		for _, memberID := range memberIDs {
-			if memberID == ownerID {
-				continue
-			}
-			participant := model.ConversationParticipant{
-				ConversationID: conversation.ID,
-				UserID:         memberID,
-				LastReadSeq:    0,
-			}
-			if err := tx.Create(&participant).Error; err != nil {
-				// 单个参与者添加失败继续处理其他成员
-				continue
-			}
-		}
-
-		return nil
-	})
-
-	if err != nil {
+	// 使用仓储创建会话和参与者
+	if err := s.messageRepo.CreateConversationWithParticipants(conversation, participants); err != nil {
 		// 记录错误但不影响群组创建成功
 	}
 
@@ -418,30 +390,8 @@ func (s *groupService) TransferOwner(userID string, groupID string, newOwnerID s
 		return ErrNotGroupMember
 	}
 
-	// 在事务中更新
-	return s.db.Transaction(func(tx *gorm.DB) error {
-		// 更新群组的群主
-		group.OwnerID = newOwnerID
-		if err := tx.Save(group).Error; err != nil {
-			return err
-		}
-
-		// 更新原群主为管理员
-		if err := tx.Model(&model.GroupMember{}).
-			Where("group_id = ? AND user_id = ?", groupID, userID).
-			Update("role", model.GroupRoleAdmin).Error; err != nil {
-			return err
-		}
-
-		// 更新新群主为群主
-		if err := tx.Model(&model.GroupMember{}).
-			Where("group_id = ? AND user_id = ?", groupID, newOwnerID).
-			Update("role", model.GroupRoleOwner).Error; err != nil {
-			return err
-		}
-
-		return nil
-	})
+	// 使用仓储的 TransferOwner 方法（在事务中更新）
+	return s.groupRepo.TransferOwner(groupID, userID, newOwnerID)
 }
 
 // GetUserGroups 获取用户加入的群组列表
@@ -593,9 +543,7 @@ func (s *groupService) collectGroupReviewerIDs(groupID string, ownerID string, s
 	if ownerID != "" && ownerID != skipUserID {
 		reviewerSet[ownerID] = struct{}{}
 	}
-
-	var reviewers []model.GroupMember
-	if err := s.db.Where("group_id = ? AND role IN ?", groupID, []string{model.GroupRoleOwner, model.GroupRoleAdmin}).Find(&reviewers).Error; err == nil {
+	if reviewers, err := s.groupRepo.GetAdmins(groupID); err == nil {
 		for _, reviewer := range reviewers {
 			if reviewer.UserID == "" || reviewer.UserID == skipUserID {
 				continue