refactor: cleanup unused code and simplify internal packages

This commit performs a significant cleanup of the codebase by removing unused functions, methods, and entire files across various internal modules. This reduces technical debt and simplifies the project structure.

Key changes include:
- **cache**: Removed unused cache key generators and metrics snapshots.
- **dto**: Removed redundant converter functions and segment creation helpers.
- **middleware**: Deleted the unused `logger.go` middleware and simplified `ratelimit.go` and `casbin.go`.
- **model**: Removed unused ID helpers, database closing functions, and batch decryption logic.
- **pkg**: Cleaned up unused utility functions in `circuitbreaker`, `crypto`, `cursor`, `hook`, and `utils`.
- **service**: Deleted `account_cleanup_service.go` and removed unused helper functions in `log_cleanup_service.go` and `sensitive_service.go`.
- **repository**: Removed unused private loading methods in `comment_repo.go`.

internal/dto/call_dto.go

@@ -143,49 +143,3 @@ type CallConfigResponse struct {
 	ICEServers []ICEServerConfig `json:"ice_servers"`
 }
 
-// ==================== Converter Functions ====================
-
-// ConvertCallSessionToResponse 转换通话会话为响应格式
-func ConvertCallSessionToResponse(call *model.CallSession, caller *model.User, participants []*model.User) *CallSessionResponse {
-	resp := &CallSessionResponse{
-		ID:             call.ID,
-		ConversationID: call.ConversationID,
-		CallerID:       call.CallerID,
-		CallType:       call.CallType,
-		Status:         call.Status,
-		StartedAt:      call.StartedAt,
-		EndedAt:        call.EndedAt,
-		Duration:       call.Duration,
-		CreatedAt:      call.CreatedAt,
-	}
-
-	if call.GroupID != nil {
-		resp.GroupID = *call.GroupID
-	}
-
-	if caller != nil {
-		resp.Caller = ConvertUserToResponse(caller)
-	}
-
-	// 转换参与者
-	resp.Participants = make([]CallParticipantResponse, 0, len(call.Participants))
-	userMap := make(map[string]*model.User)
-	for _, u := range participants {
-		userMap[u.ID] = u
-	}
-
-	for _, p := range call.Participants {
-		pr := CallParticipantResponse{
-			UserID:   p.UserID,
-			Status:   p.Status,
-			JoinedAt: p.JoinedAt,
-			LeftAt:   p.LeftAt,
-		}
-		if u, ok := userMap[p.UserID]; ok {
-			pr.User = ConvertUserToResponse(u)
-		}
-		resp.Participants = append(resp.Participants, pr)
-	}
-
-	return resp
-}

internal/dto/group_converter.go

@@ -50,26 +50,6 @@ func GroupMemberToResponse(member *model.GroupMember) *GroupMemberResponse {
 	}
 }
 
-// GroupMemberToResponseWithUser 将GroupMember转换为GroupMemberResponse（包含用户信息）
-func GroupMemberToResponseWithUser(member *model.GroupMember, user *model.User) *GroupMemberResponse {
-	if member == nil {
-		return nil
-	}
-	resp := GroupMemberToResponse(member)
-	if user != nil {
-		resp.User = ConvertUserToResponse(user)
-	}
-	return resp
-}
-
-// GroupMembersToResponse 将GroupMember列表转换为GroupMemberResponse列表
-func GroupMembersToResponse(members []model.GroupMember) []*GroupMemberResponse {
-	result := make([]*GroupMemberResponse, 0, len(members))
-	for i := range members {
-		result = append(result, GroupMemberToResponse(&members[i]))
-	}
-	return result
-}
 
 // GroupAnnouncementToResponse 将GroupAnnouncement转换为GroupAnnouncementResponse
 func GroupAnnouncementToResponse(announcement *model.GroupAnnouncement) *GroupAnnouncementResponse {

internal/dto/message_converter.go

@@ -107,14 +107,6 @@ func ConvertMessagesToResponse(messages []*model.Message) []*MessageResponse {
 	return result
 }
 
-// ConvertConversationsToResponse 将Conversation列表转换为响应列表
-func ConvertConversationsToResponse(convs []*model.Conversation) []*ConversationResponse {
-	result := make([]*ConversationResponse, 0, len(convs))
-	for _, conv := range convs {
-		result = append(result, ConvertConversationToResponse(conv, nil, 0, nil, false, false))
-	}
-	return result
-}
 
 // ==================== PushRecord 转换 ====================
 

internal/dto/notification_converter.go

@@ -33,49 +33,6 @@ func ConvertNotificationsToResponse(notifications []*model.Notification) []*Noti
 	return result
 }
 
-// ==================== SystemMessage 转换 ====================
-
-// SystemMessageToResponse 将Message转换为SystemMessageResponse
-func SystemMessageToResponse(msg *model.Message) *SystemMessageResponse {
-	if msg == nil {
-		return nil
-	}
-
-	// 从 segments 中提取文本内容
-	content := ExtractTextContentFromModel(msg.Segments)
-
-	resp := &SystemMessageResponse{
-		ID:         msg.ID,
-		SenderID:   msg.SenderID,
-		ReceiverID: "", // 系统消息的接收者需要从上下文获取
-		Content:    content,
-		Category:   string(msg.Category),
-		SystemType: string(msg.SystemType),
-		CreatedAt:  msg.CreatedAt,
-	}
-	if msg.ExtraData != nil {
-		resp.ExtraData = map[string]any{
-			"actor_id":    msg.ExtraData.ActorID,
-			"actor_name":  msg.ExtraData.ActorName,
-			"avatar_url":  msg.ExtraData.AvatarURL,
-			"target_id":   msg.ExtraData.TargetID,
-			"target_type": msg.ExtraData.TargetType,
-			"action_url":  msg.ExtraData.ActionURL,
-			"action_time": msg.ExtraData.ActionTime,
-		}
-	}
-	return resp
-}
-
-// SystemMessagesToResponse 将Message列表转换为SystemMessageResponse列表
-func SystemMessagesToResponse(messages []*model.Message) []*SystemMessageResponse {
-	result := make([]*SystemMessageResponse, 0, len(messages))
-	for _, msg := range messages {
-		result = append(result, SystemMessageToResponse(msg))
-	}
-	return result
-}
-
 // SystemNotificationToResponse 将SystemNotification转换为SystemMessageResponse
 func SystemNotificationToResponse(n *model.SystemNotification) *SystemMessageResponse {
 	if n == nil {
@@ -118,11 +75,3 @@ func SystemNotificationToResponse(n *model.SystemNotification) *SystemMessageRes
 	return resp
 }
 
-// SystemNotificationsToResponse 将SystemNotification列表转换为SystemMessageResponse列表
-func SystemNotificationsToResponse(notifications []*model.SystemNotification) []*SystemMessageResponse {
-	result := make([]*SystemMessageResponse, 0, len(notifications))
-	for _, n := range notifications {
-		result = append(result, SystemNotificationToResponse(n))
-	}
-	return result
-}

internal/dto/post_converter.go

@@ -212,14 +212,6 @@ func ConvertCommentToResponse(comment *model.Comment, isLiked bool) *CommentResp
 	}
 }
 
-// ConvertCommentsToResponse 将Comment列表转换为响应列表
-func ConvertCommentsToResponse(comments []*model.Comment, isLiked bool) []*CommentResponse {
-	result := make([]*CommentResponse, 0, len(comments))
-	for _, comment := range comments {
-		result = append(result, ConvertCommentToResponse(comment, isLiked))
-	}
-	return result
-}
 
 // IsLikedChecker 点赞状态检查器接口
 type IsLikedChecker interface {

internal/dto/report.go

@@ -108,11 +108,6 @@ type AdminBatchHandleResponse struct {
 
 // ==================== 转换函数 ====================
 
-func baseAdminReportFields(report *model.Report) (string, string) {
-	reason := string(report.Reason)
-	status := string(report.Status)
-	return reason, status
-}
 
 // ConvertReportToResponse 将 Report 模型转换为响应
 func ConvertReportToResponse(report *model.Report) *ReportResponse {

internal/dto/segment.go

@@ -8,15 +8,6 @@ import (
 	"with_you/internal/model"
 )
 
-// ParseSegmentData 解析Segment数据到目标结构体
-func ParseSegmentData(segment model.MessageSegment, target any) error {
-	dataBytes, err := json.Marshal(segment.Data)
-	if err != nil {
-		return err
-	}
-	return json.Unmarshal(dataBytes, target)
-}
-
 // NewTextSegment 创建文本Segment
 func NewTextSegment(content string) model.MessageSegment {
 	return model.MessageSegment{
@@ -25,137 +16,6 @@ func NewTextSegment(content string) model.MessageSegment {
 	}
 }
 
-// NewImageSegment 创建图片Segment
-func NewImageSegment(url string, width, height int, thumbnailURL string) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeImage),
-		Data: map[string]any{
-			"url":           url,
-			"width":         width,
-			"height":        height,
-			"thumbnail_url": thumbnailURL,
-		},
-	}
-}
-
-// NewImageSegmentWithSize 创建带文件大小的图片Segment
-func NewImageSegmentWithSize(url string, width, height int, thumbnailURL string, fileSize int64) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeImage),
-		Data: map[string]any{
-			"url":           url,
-			"width":         width,
-			"height":        height,
-			"thumbnail_url": thumbnailURL,
-			"file_size":     fileSize,
-		},
-	}
-}
-
-// NewVoiceSegment 创建语音Segment
-func NewVoiceSegment(url string, duration int, fileSize int64) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeVoice),
-		Data: map[string]any{
-			"url":       url,
-			"duration":  duration,
-			"file_size": fileSize,
-		},
-	}
-}
-
-// NewVideoSegment 创建视频Segment
-func NewVideoSegment(url string, width, height, duration int, thumbnailURL string, fileSize int64) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeVideo),
-		Data: map[string]any{
-			"url":           url,
-			"width":         width,
-			"height":        height,
-			"duration":      duration,
-			"thumbnail_url": thumbnailURL,
-			"file_size":     fileSize,
-		},
-	}
-}
-
-// NewFileSegment 创建文件Segment
-func NewFileSegment(url, name string, size int64, mimeType string) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeFile),
-		Data: map[string]any{
-			"url":       url,
-			"name":      name,
-			"size":      size,
-			"mime_type": mimeType,
-		},
-	}
-}
-
-// NewAtSegment 创建@Segment，只存储 user_id，昵称由前端根据群成员列表实时解析
-func NewAtSegment(userID string) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeAt),
-		Data: map[string]any{
-			"user_id": userID,
-		},
-	}
-}
-
-// NewAtAllSegment 创建@所有人Segment
-func NewAtAllSegment() model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeAt),
-		Data: map[string]any{
-			"user_id": "all",
-		},
-	}
-}
-
-// NewReplySegment 创建回复Segment
-func NewReplySegment(messageID string) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeReply),
-		Data: map[string]any{"id": messageID},
-	}
-}
-
-// NewFaceSegment 创建表情Segment
-func NewFaceSegment(id int, name, url string) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeFace),
-		Data: map[string]any{
-			"id":   id,
-			"name": name,
-			"url":  url,
-		},
-	}
-}
-
-// NewLinkSegment 创建链接Segment
-func NewLinkSegment(url, title, description, image string) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypeLink),
-		Data: map[string]any{
-			"url":         url,
-			"title":       title,
-			"description": description,
-			"image":       image,
-		},
-	}
-}
-
-// NewPostRefSegment 创建帖子内链Segment
-func NewPostRefSegment(postID, title string) model.MessageSegment {
-	return model.MessageSegment{
-		Type: string(SegmentTypePostRef),
-		Data: map[string]any{
-			"post_id": postID,
-			"title":   title,
-		},
-	}
-}
-
 // ExtractVoteSegmentData 从消息链中提取投票Segment数据
 func ExtractVoteSegmentData(segments model.MessageSegments) *VoteSegmentData {
 	for _, segment := range segments {
@@ -179,22 +39,6 @@ func HasVoteSegment(segments model.MessageSegments) bool {
 	return HasSegmentType(segments, SegmentTypeVote)
 }
 
-// ExtractTextContentFromJSON 从JSON格式的segments中提取纯文本内容
-// 用于从数据库读取的 []byte 格式的 segments
-// 已废弃：现在数据库直接存储 model.MessageSegments 类型
-func ExtractTextContentFromJSON(segmentsJSON []byte) string {
-	if len(segmentsJSON) == 0 {
-		return ""
-	}
-
-	var segments model.MessageSegments
-	if err := json.Unmarshal(segmentsJSON, &segments); err != nil {
-		return ""
-	}
-
-	return ExtractTextContentFromModel(segments)
-}
-
 // ExtractTextContentFromModel 从 model.MessageSegments 中提取纯文本内容
 func ExtractTextContentFromModel(segments model.MessageSegments) string {
 	var result string
@@ -290,72 +134,6 @@ func ExtractReferencedPosts(segments model.MessageSegments) []string {
 	return postIDs
 }
 
-// HasPostRefSegment 检查消息链中是否包含帖子引用
-func HasPostRefSegment(segments model.MessageSegments) bool {
-	return HasSegmentType(segments, SegmentTypePostRef)
-}
-
-// IsAtAll 检查消息是否@了所有人
-func IsAtAll(segments model.MessageSegments) bool {
-	return slices.ContainsFunc(segments, func(segment model.MessageSegment) bool {
-		if segment.Type == string(SegmentTypeAt) {
-			if userID, ok := segment.Data["user_id"].(string); ok && userID == "all" {
-				return true
-			}
-		}
-		return false
-	})
-}
-
-// GetReplyMessageID 从消息链中获取被回复的消息ID
-// 如果没有回复segment，返回空字符串
-func GetReplyMessageID(segments model.MessageSegments) string {
-	idx := slices.IndexFunc(segments, func(segment model.MessageSegment) bool {
-		return segment.Type == string(SegmentTypeReply)
-	})
-	if idx == -1 {
-		return ""
-	}
-	if id, ok := segments[idx].Data["id"].(string); ok {
-		return id
-	}
-	return ""
-}
-
-// BuildSegmentsFromContent 从旧版content构建segments
-// 用于兼容旧版本消息
-func BuildSegmentsFromContent(contentType, content string, mediaURL *string) model.MessageSegments {
-	var segments model.MessageSegments
-
-	switch contentType {
-	case "text":
-		segments = append(segments, NewTextSegment(content))
-	case "image":
-		if mediaURL != nil {
-			segments = append(segments, NewImageSegment(*mediaURL, 0, 0, ""))
-		}
-	case "voice":
-		if mediaURL != nil {
-			segments = append(segments, NewVoiceSegment(*mediaURL, 0, 0))
-		}
-	case "video":
-		if mediaURL != nil {
-			segments = append(segments, NewVideoSegment(*mediaURL, 0, 0, 0, "", 0))
-		}
-	case "file":
-		if mediaURL != nil {
-			segments = append(segments, NewFileSegment(*mediaURL, content, 0, ""))
-		}
-	default:
-		// 默认当作文本处理
-		if content != "" {
-			segments = append(segments, NewTextSegment(content))
-		}
-	}
-
-	return segments
-}
-
 // HasSegmentType 检查消息链中是否包含指定类型的segment
 func HasSegmentType(segments model.MessageSegments, segmentType SegmentType) bool {
 	return slices.ContainsFunc(segments, func(segment model.MessageSegment) bool {
@@ -363,71 +141,3 @@ func HasSegmentType(segments model.MessageSegments, segmentType SegmentType) boo
 	})
 }
 
-// GetSegmentsByType 获取消息链中所有指定类型的segment
-func GetSegmentsByType(segments model.MessageSegments, segmentType SegmentType) []model.MessageSegment {
-	var result []model.MessageSegment
-	for _, segment := range segments {
-		if segment.Type == string(segmentType) {
-			result = append(result, segment)
-		}
-	}
-	return result
-}
-
-// GetFirstImageURL 获取消息链中第一张图片的URL
-// 如果没有图片，返回空字符串
-func GetFirstImageURL(segments model.MessageSegments) string {
-	idx := slices.IndexFunc(segments, func(segment model.MessageSegment) bool {
-		return segment.Type == string(SegmentTypeImage)
-	})
-	if idx == -1 {
-		return ""
-	}
-	if url, ok := segments[idx].Data["url"].(string); ok {
-		return url
-	}
-	return ""
-}
-
-// GetFirstMediaURL 获取消息链中第一个媒体文件的URL（图片/视频/语音/文件）
-// 用于兼容旧版本API
-func GetFirstMediaURL(segments model.MessageSegments) string {
-	idx := slices.IndexFunc(segments, func(segment model.MessageSegment) bool {
-		switch segment.Type {
-		case string(SegmentTypeImage), string(SegmentTypeVideo), string(SegmentTypeVoice), string(SegmentTypeFile):
-			return true
-		}
-		return false
-	})
-	if idx == -1 {
-		return ""
-	}
-	if url, ok := segments[idx].Data["url"].(string); ok {
-		return url
-	}
-	return ""
-}
-
-// DetermineContentType 从消息链推断消息类型（用于兼容旧版本）
-func DetermineContentType(segments model.MessageSegments) string {
-	if len(segments) == 0 {
-		return "text"
-	}
-
-	// 优先检查媒体类型
-	for _, segment := range segments {
-		switch segment.Type {
-		case string(SegmentTypeImage):
-			return "image"
-		case string(SegmentTypeVideo):
-			return "video"
-		case string(SegmentTypeVoice):
-			return "voice"
-		case string(SegmentTypeFile):
-			return "file"
-		}
-	}
-
-	// 默认返回text
-	return "text"
-}

internal/dto/trade_converter.go

@@ -66,6 +66,3 @@ func ConvertTradeItemsToResponse(items []*model.TradeItem, favoriteMap map[strin
 	return result
 }
 
-func ConvertTradeItemToDetailResponse(item *model.TradeItem, isFavorited bool) *TradeItemResponse {
-	return ConvertTradeItemToResponse(item, isFavorited)
-}