28cfcbf9a8
Consolidate comment status changes through transitionStatus() to ensure posts.comments_count and comments.replies_count are atomically maintained within the same transaction, preventing inconsistencies between displayed and stored counts. - Remove separate ApplyPublishedStats() calls, now handled in UpdateModerationStatus - Add cache invalidation for admin moderation operations - Update report auto-hide to use unified status transition
642 lines
20 KiB
Go
642 lines
20 KiB
Go
package repository
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import (
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"errors"
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"with_you/internal/model"
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"with_you/internal/pkg/cursor"
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"context"
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"gorm.io/gorm"
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)
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// CommentRepository 评论仓储接口
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type CommentRepository interface {
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Create(comment *model.Comment) error
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GetByID(id string) (*model.Comment, error)
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Update(comment *model.Comment) error
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UpdateModerationStatus(commentID string, status model.CommentStatus, rejectReason string, reviewedBy string) (*model.Comment, error)
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Delete(id string) error
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GetByPostID(postID string, page, pageSize int) ([]*model.Comment, int64, error)
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GetByPostIDWithReplies(postID string, page, pageSize, replyLimit int) ([]*model.Comment, int64, error)
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GetRepliesByRootID(rootID string, page, pageSize int) ([]*model.Comment, int64, error)
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GetReplies(parentID string) ([]*model.Comment, error)
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Like(commentID, userID string) error
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Unlike(commentID, userID string) error
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IsLiked(commentID, userID string) bool
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IsLikedBatch(commentIDs []string, userID string) map[string]bool
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GetAdminCommentList(filter AdminCommentListFilter) ([]*model.Comment, int64, error)
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GetAdminCommentByID(id string) (*model.Comment, error)
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BatchDelete(ids []string) ([]string, error)
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GetCommentsByPostIDForAdmin(postID string, page, pageSize int) ([]*model.Comment, int64, error)
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GetCommentsByCursor(ctx context.Context, postID string, req *cursor.PageRequest) (*cursor.CursorPageResult[*model.Comment], error)
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GetRepliesByCursor(ctx context.Context, rootID string, req *cursor.PageRequest) (*cursor.CursorPageResult[*model.Comment], error)
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}
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// commentRepository 评论仓储实现
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type commentRepository struct {
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db *gorm.DB
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}
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// NewCommentRepository 创建评论仓储
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func NewCommentRepository(db *gorm.DB) CommentRepository {
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return &commentRepository{db: db}
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}
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// Create 创建评论
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func (r *commentRepository) Create(comment *model.Comment) error {
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return r.db.Create(comment).Error
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}
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// GetByID 根据ID获取评论
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func (r *commentRepository) GetByID(id string) (*model.Comment, error) {
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var comment model.Comment
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err := r.db.Preload("User").First(&comment, "id = ?", id).Error
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if err != nil {
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return nil, err
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}
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return &comment, nil
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}
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// Update 更新评论（仅内容字段，如 content / segments / images）。
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//
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// 防御性：评论的 status 字段是计数维护的核心，必须经由 UpdateModerationStatus /
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// Delete 等状态转换通道变更，否则会破坏 comments_count / replies_count 一致性。
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// 因此本方法显式不更新 status / reviewed_* 等审核字段——即便上层传入的
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// comment 结构体 status 为零值或脏值，也不会污染状态机。
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func (r *commentRepository) Update(comment *model.Comment) error {
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return r.db.Model(&model.Comment{}).
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Where("id = ?", comment.ID).
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Select("content", "segments", "images", "updated_at").
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Updates(comment).Error
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}
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// UpdateModerationStatus 更新评论审核状态，并在同一事务内原子地维护
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// 帖子评论数 / 父评论回复数等统计字段。
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//
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// 计数维护统一收敛到 transitionStatus（评论状态变更的唯一通道），
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// 因此任何调用方（自动审核、管理端单条 / 批量审核、举报自动隐藏等）
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// 都能正确维护计数，避免"评论显示 N 条但计数为 N-1"。
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// 同时内置防御：非法状态转换（如 deleted → published）会被拒绝，
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// 计数递减使用 CASE WHEN 保证永不为负。
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//
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// 返回更新后的评论（含 User 关联），便于调用方做缓存失效、通知等后续处理。
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func (r *commentRepository) UpdateModerationStatus(commentID string, status model.CommentStatus, rejectReason string, reviewedBy string) (*model.Comment, error) {
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var updated model.Comment
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err := r.db.Transaction(func(tx *gorm.DB) error {
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prev, err := transitionStatus(tx, commentID, status)
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if err != nil {
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return err
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}
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// 状态未变化或仅元数据需补充（reviewed_at / reviewed_by / reject_reason）
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updates := map[string]any{
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"reviewed_at": gorm.Expr("CURRENT_TIMESTAMP"),
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"reviewed_by": reviewedBy,
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"reject_reason": rejectReason,
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"updated_at": gorm.Expr("updated_at"),
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}
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if prev.Status != status {
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updates["status"] = status
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}
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if err := tx.Model(&model.Comment{}).
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Where("id = ?", commentID).
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UpdateColumns(updates).Error; err != nil {
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return err
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}
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// 重新加载（含 User 关联）供调用方使用
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return tx.Preload("User").First(&updated, "id = ?", commentID).Error
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})
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if err != nil {
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return nil, err
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}
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return &updated, nil
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}
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// Delete 删除评论（软删除，同时清理关联数据）。
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// 删除 = 状态迁移到 deleted，复用 transitionStatus 统一维护计数，
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// 保证 Delete 与审核路径的计数行为一致、对称。
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func (r *commentRepository) Delete(id string) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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// 统一走状态转换层：published → deleted 会自动 -1 计数；非 published 删除则不调整
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if _, err := transitionStatus(tx, id, model.CommentStatusDeleted); err != nil {
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if errors.Is(err, errInvalidStatusTransition) {
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// 已删除的评论重复删除：视为幂等成功
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return nil
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}
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return err
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}
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// 删除评论点赞记录
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if err := tx.Where("comment_id = ?", id).Delete(&model.CommentLike{}).Error; err != nil {
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return err
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}
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// 删除评论（软删除）
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if err := tx.Delete(&model.Comment{}, "id = ?", id).Error; err != nil {
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return err
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}
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return nil
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})
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}
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// GetByPostID 获取帖子评论
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func (r *commentRepository) GetByPostID(postID string, page, pageSize int) ([]*model.Comment, int64, error) {
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var comments []*model.Comment
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var total int64
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r.db.Model(&model.Comment{}).Where("post_id = ? AND parent_id IS NULL AND status = ?", postID, model.CommentStatusPublished).Count(&total)
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offset := (page - 1) * pageSize
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err := r.db.Where("post_id = ? AND parent_id IS NULL AND status = ?", postID, model.CommentStatusPublished).
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Preload("User").
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Offset(offset).Limit(pageSize).
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Order("created_at ASC").
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Find(&comments).Error
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return comments, total, err
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}
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// GetByPostIDWithReplies 获取帖子评论（包含回复，扁平化结构）
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// 所有层级的回复都扁平化展示在顶级评论的 replies 中
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func (r *commentRepository) GetByPostIDWithReplies(postID string, page, pageSize, replyLimit int) ([]*model.Comment, int64, error) {
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var comments []*model.Comment
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var total int64
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r.db.Model(&model.Comment{}).Where("post_id = ? AND parent_id IS NULL AND status = ?", postID, model.CommentStatusPublished).Count(&total)
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offset := (page - 1) * pageSize
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err := r.db.Where("post_id = ? AND parent_id IS NULL AND status = ?", postID, model.CommentStatusPublished).
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Preload("User").
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Offset(offset).Limit(pageSize).
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Order("created_at ASC").
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Find(&comments).Error
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if err != nil {
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return nil, 0, err
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}
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if len(comments) == 0 {
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return comments, total, nil
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}
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rootIDs := make([]string, 0, len(comments))
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commentsByID := make(map[string]*model.Comment, len(comments))
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for _, comment := range comments {
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rootIDs = append(rootIDs, comment.ID)
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commentsByID[comment.ID] = comment
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}
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// 批量加载所有回复，内存中按 root_id 分组并裁剪每个根评论的返回条数
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var allReplies []*model.Comment
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if err := r.db.Where("root_id IN ? AND status = ?", rootIDs, model.CommentStatusPublished).
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Preload("User").
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Order("created_at ASC").
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Find(&allReplies).Error; err != nil {
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return nil, 0, err
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}
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repliesByRoot := make(map[string][]*model.Comment, len(rootIDs))
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for _, reply := range allReplies {
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if reply.RootID == nil {
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continue
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}
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rootID := *reply.RootID
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if replyLimit <= 0 || len(repliesByRoot[rootID]) < replyLimit {
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repliesByRoot[rootID] = append(repliesByRoot[rootID], reply)
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}
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}
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type replyCountRow struct {
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RootID string
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Total int64
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}
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var replyCountRows []replyCountRow
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if err := r.db.Model(&model.Comment{}).
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Select("root_id, COUNT(*) AS total").
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Where("root_id IN ? AND status = ?", rootIDs, model.CommentStatusPublished).
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Group("root_id").
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Scan(&replyCountRows).Error; err != nil {
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return nil, 0, err
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}
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replyCountMap := make(map[string]int64, len(replyCountRows))
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for _, row := range replyCountRows {
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replyCountMap[row.RootID] = row.Total
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}
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for _, rootID := range rootIDs {
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comment := commentsByID[rootID]
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comment.Replies = repliesByRoot[rootID]
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comment.RepliesCount = int(replyCountMap[rootID])
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}
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return comments, total, nil
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}
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// GetRepliesByRootID 根据根评论ID分页获取回复（扁平化）
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func (r *commentRepository) GetRepliesByRootID(rootID string, page, pageSize int) ([]*model.Comment, int64, error) {
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var replies []*model.Comment
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var total int64
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// 统计总数
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r.db.Model(&model.Comment{}).Where("root_id = ? AND status = ?", rootID, model.CommentStatusPublished).Count(&total)
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// 分页查询
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offset := (page - 1) * pageSize
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err := r.db.Where("root_id = ? AND status = ?", rootID, model.CommentStatusPublished).
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Preload("User").
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Order("created_at ASC").
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Offset(offset).
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Limit(pageSize).
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Find(&replies).Error
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return replies, total, err
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}
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// GetReplies 获取回复
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func (r *commentRepository) GetReplies(parentID string) ([]*model.Comment, error) {
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var comments []*model.Comment
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err := r.db.Where("parent_id = ? AND status = ?", parentID, model.CommentStatusPublished).
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Preload("User").
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Order("created_at ASC").
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Find(&comments).Error
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return comments, err
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}
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// Like 点赞评论（使用事务保证数据一致性）
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func (r *commentRepository) Like(commentID, userID string) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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// 检查是否已经点赞
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var existing model.CommentLike
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err := tx.Where("comment_id = ? AND user_id = ?", commentID, userID).First(&existing).Error
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if err == nil {
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// 已经点赞
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return nil
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}
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if err != gorm.ErrRecordNotFound {
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return err
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}
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// 创建点赞记录
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like := &model.CommentLike{
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CommentID: commentID,
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UserID: userID,
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}
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if err := tx.Create(like).Error; err != nil {
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return err
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}
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// 增加评论点赞数
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return tx.Model(&model.Comment{}).Where("id = ?", commentID).
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UpdateColumn("likes_count", gorm.Expr("likes_count + 1")).Error
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})
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}
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// Unlike 取消点赞评论（使用事务保证数据一致性）
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func (r *commentRepository) Unlike(commentID, userID string) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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result := tx.Where("comment_id = ? AND user_id = ?", commentID, userID).Delete(&model.CommentLike{})
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if result.Error != nil {
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return result.Error
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}
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if result.RowsAffected > 0 {
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// 减少评论点赞数
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return tx.Model(&model.Comment{}).Where("id = ?", commentID).
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UpdateColumn("likes_count", gorm.Expr("likes_count - 1")).Error
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}
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return nil
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})
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}
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// IsLiked 检查是否已点赞
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func (r *commentRepository) IsLiked(commentID, userID string) bool {
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var count int64
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r.db.Model(&model.CommentLike{}).Where("comment_id = ? AND user_id = ?", commentID, userID).Count(&count)
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return count > 0
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}
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// IsLikedBatch 批量检查是否点赞（解决 N+1 问题）
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// 返回 map[commentID]bool
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func (r *commentRepository) IsLikedBatch(commentIDs []string, userID string) map[string]bool {
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result := make(map[string]bool)
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if len(commentIDs) == 0 || userID == "" {
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return result
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}
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// 初始化所有 commentID 为 false
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for _, commentID := range commentIDs {
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result[commentID] = false
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}
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// 一次性查询所有点赞记录
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var likedCommentIDs []string
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r.db.Model(&model.CommentLike{}).
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Where("comment_id IN ? AND user_id = ?", commentIDs, userID).
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Pluck("comment_id", &likedCommentIDs)
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// 更新已点赞的评论
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for _, commentID := range likedCommentIDs {
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result[commentID] = true
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}
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return result
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}
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// AdminCommentListFilter 管理端评论列表筛选条件
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type AdminCommentListFilter struct {
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Keyword string
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PostID string
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AuthorID string
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Status string
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StartDate string
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EndDate string
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Page int
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PageSize int
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}
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// GetAdminCommentList 获取管理端评论列表
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func (r *commentRepository) GetAdminCommentList(filter AdminCommentListFilter) ([]*model.Comment, int64, error) {
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var comments []*model.Comment
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var total int64
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query := r.db.Model(&model.Comment{}).Preload("User")
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// 应用筛选条件
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if filter.Keyword != "" {
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query = query.Where("content LIKE ?", "%"+filter.Keyword+"%")
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}
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if filter.PostID != "" {
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query = query.Where("post_id = ?", filter.PostID)
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}
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if filter.AuthorID != "" {
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query = query.Where("user_id = ?", filter.AuthorID)
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}
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if filter.Status != "" {
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query = query.Where("status = ?", filter.Status)
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}
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if filter.StartDate != "" {
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query = query.Where("created_at >= ?", filter.StartDate)
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}
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if filter.EndDate != "" {
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query = query.Where("created_at <= ?", filter.EndDate+" 23:59:59")
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}
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// 统计总数
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if err := query.Count(&total).Error; err != nil {
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return nil, 0, err
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}
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// 分页查询
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offset := (filter.Page - 1) * filter.PageSize
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if err := query.Offset(offset).Limit(filter.PageSize).Order("created_at DESC").Find(&comments).Error; err != nil {
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return nil, 0, err
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}
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return comments, total, nil
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}
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// GetAdminCommentByID 获取管理端评论详情（包含关联信息）
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func (r *commentRepository) GetAdminCommentByID(id string) (*model.Comment, error) {
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var comment model.Comment
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err := r.db.Preload("User").First(&comment, "id = ?", id).Error
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if err != nil {
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return nil, err
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}
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return &comment, nil
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}
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// BatchDelete 批量删除评论。
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// 逐条复用 transitionStatus 完成 published → deleted 的状态迁移，
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// 统一维护 comments_count 与父评论 replies_count（修复此前批量删除漏减 replies_count 的问题）。
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// 返回失败 ID 列表（当前实现下事务整体回滚，故失败时返回全部 ids）。
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func (r *commentRepository) BatchDelete(ids []string) ([]string, error) {
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if len(ids) == 0 {
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return nil, nil
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}
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err := r.db.Transaction(func(tx *gorm.DB) error {
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for _, id := range ids {
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// 统一走状态转换层：幂等处理已删除评论，已发布评论自动 -1 计数 + 父回复数
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if _, terr := transitionStatus(tx, id, model.CommentStatusDeleted); terr != nil {
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if errors.Is(terr, errInvalidStatusTransition) {
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continue // 已删除：幂等跳过
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}
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return terr
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}
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}
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// 批量删除评论点赞记录
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if err := tx.Where("comment_id IN ?", ids).Delete(&model.CommentLike{}).Error; err != nil {
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return err
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}
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// 批量删除评论（软删除）
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if err := tx.Where("id IN ?", ids).Delete(&model.Comment{}).Error; err != nil {
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return err
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}
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return nil
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})
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if err != nil {
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return ids, err
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}
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return nil, nil
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}
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// GetCommentsByPostIDForAdmin 管理端获取帖子的评论列表（包含所有状态）
|
||
func (r *commentRepository) GetCommentsByPostIDForAdmin(postID string, page, pageSize int) ([]*model.Comment, int64, error) {
|
||
var comments []*model.Comment
|
||
var total int64
|
||
|
||
r.db.Model(&model.Comment{}).Where("post_id = ?", postID).Count(&total)
|
||
|
||
offset := (page - 1) * pageSize
|
||
err := r.db.Where("post_id = ?", postID).
|
||
Preload("User").
|
||
Offset(offset).Limit(pageSize).
|
||
Order("created_at DESC").
|
||
Find(&comments).Error
|
||
|
||
return comments, total, err
|
||
}
|
||
|
||
// ========== Cursor Pagination Methods ==========
|
||
|
||
// GetCommentsByCursor 游标分页获取帖子评论（包含回复）
|
||
// 排序方式：created_at ASC（最早发布的为一楼）
|
||
func (r *commentRepository) GetCommentsByCursor(ctx context.Context, postID string, req *cursor.PageRequest) (*cursor.CursorPageResult[*model.Comment], error) {
|
||
// 构建基础查询 - 只查询顶级评论
|
||
query := r.db.WithContext(ctx).Model(&model.Comment{}).
|
||
Where("post_id = ? AND parent_id IS NULL AND status = ?", postID, model.CommentStatusPublished)
|
||
|
||
// 使用游标构建器
|
||
builder := cursor.NewBuilder(query, cursor.SortByCreatedAtAsc).
|
||
WithCursor(req.Cursor, req.Direction).
|
||
WithPageSize(req.PageSize)
|
||
|
||
if builder.Error() != nil {
|
||
// 无效游标，返回空列表
|
||
return cursor.NewCursorPageResult([]*model.Comment{}, "", "", false), nil
|
||
}
|
||
|
||
// 执行查询
|
||
var comments []*model.Comment
|
||
query = builder.Build().Preload("User")
|
||
if err := query.Find(&comments).Error; err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
// 构建响应
|
||
pageSize := builder.GetPageSize()
|
||
hasMore := cursor.HasMore(len(comments), pageSize)
|
||
if hasMore {
|
||
comments = comments[:pageSize]
|
||
}
|
||
|
||
// 加载每个评论的回复（默认加载前3条）
|
||
if len(comments) > 0 {
|
||
r.loadRepliesForComments(comments, 3)
|
||
}
|
||
|
||
// 生成游标
|
||
var nextCursor, prevCursor string
|
||
if len(comments) > 0 {
|
||
// 下一页游标
|
||
if hasMore {
|
||
lastComment := comments[len(comments)-1]
|
||
nextCursor = cursor.NewCursor(
|
||
cursor.FormatTime(lastComment.CreatedAt),
|
||
lastComment.ID,
|
||
cursor.SortByCreatedAtAsc,
|
||
).Encode()
|
||
}
|
||
// 上一页游标
|
||
firstComment := comments[0]
|
||
prevCursor = cursor.NewCursor(
|
||
cursor.FormatTime(firstComment.CreatedAt),
|
||
firstComment.ID,
|
||
cursor.SortByCreatedAtAsc,
|
||
).Encode()
|
||
}
|
||
|
||
return cursor.NewCursorPageResult(comments, nextCursor, prevCursor, hasMore), nil
|
||
}
|
||
|
||
// loadRepliesForComments 为评论列表加载回复
|
||
func (r *commentRepository) loadRepliesForComments(comments []*model.Comment, replyLimit int) {
|
||
if len(comments) == 0 {
|
||
return
|
||
}
|
||
|
||
rootIDs := make([]string, 0, len(comments))
|
||
commentsByID := make(map[string]*model.Comment, len(comments))
|
||
for _, comment := range comments {
|
||
rootIDs = append(rootIDs, comment.ID)
|
||
commentsByID[comment.ID] = comment
|
||
}
|
||
|
||
// 批量加载所有回复
|
||
var allReplies []*model.Comment
|
||
if err := r.db.Where("root_id IN ? AND status = ?", rootIDs, model.CommentStatusPublished).
|
||
Preload("User").
|
||
Order("created_at ASC").
|
||
Find(&allReplies).Error; err != nil {
|
||
return
|
||
}
|
||
|
||
// 按 root_id 分组并裁剪
|
||
repliesByRoot := make(map[string][]*model.Comment, len(rootIDs))
|
||
for _, reply := range allReplies {
|
||
if reply.RootID == nil {
|
||
continue
|
||
}
|
||
rootID := *reply.RootID
|
||
if replyLimit <= 0 || len(repliesByRoot[rootID]) < replyLimit {
|
||
repliesByRoot[rootID] = append(repliesByRoot[rootID], reply)
|
||
}
|
||
}
|
||
|
||
// 查询每个根评论的回复总数
|
||
type replyCountRow struct {
|
||
RootID string
|
||
Total int64
|
||
}
|
||
var replyCountRows []replyCountRow
|
||
if err := r.db.Model(&model.Comment{}).
|
||
Select("root_id, COUNT(*) AS total").
|
||
Where("root_id IN ? AND status = ?", rootIDs, model.CommentStatusPublished).
|
||
Group("root_id").
|
||
Scan(&replyCountRows).Error; err != nil {
|
||
return
|
||
}
|
||
|
||
replyCountMap := make(map[string]int64, len(replyCountRows))
|
||
for _, row := range replyCountRows {
|
||
replyCountMap[row.RootID] = row.Total
|
||
}
|
||
|
||
// 设置回复和回复数
|
||
for _, rootID := range rootIDs {
|
||
comment := commentsByID[rootID]
|
||
comment.Replies = repliesByRoot[rootID]
|
||
comment.RepliesCount = int(replyCountMap[rootID])
|
||
}
|
||
}
|
||
|
||
// GetRepliesByCursor 游标分页获取根评论的回复
|
||
// 排序方式：created_at ASC（回复按时间正序）
|
||
func (r *commentRepository) GetRepliesByCursor(ctx context.Context, rootID string, req *cursor.PageRequest) (*cursor.CursorPageResult[*model.Comment], error) {
|
||
// 构建基础查询
|
||
query := r.db.WithContext(ctx).Model(&model.Comment{}).
|
||
Where("root_id = ? AND status = ?", rootID, model.CommentStatusPublished)
|
||
|
||
// 使用游标构建器（回复按时间升序）
|
||
builder := cursor.NewBuilder(query, cursor.SortByCreatedAtAsc).
|
||
WithCursor(req.Cursor, req.Direction).
|
||
WithPageSize(req.PageSize)
|
||
|
||
if builder.Error() != nil {
|
||
// 无效游标，返回空列表
|
||
return cursor.NewCursorPageResult([]*model.Comment{}, "", "", false), nil
|
||
}
|
||
|
||
// 执行查询
|
||
var replies []*model.Comment
|
||
query = builder.Build().Preload("User")
|
||
if err := query.Find(&replies).Error; err != nil {
|
||
return nil, err
|
||
}
|
||
|
||
// 构建响应
|
||
pageSize := builder.GetPageSize()
|
||
hasMore := cursor.HasMore(len(replies), pageSize)
|
||
if hasMore {
|
||
replies = replies[:pageSize]
|
||
}
|
||
|
||
// 生成游标
|
||
var nextCursor, prevCursor string
|
||
if len(replies) > 0 {
|
||
// 下一页游标
|
||
if hasMore {
|
||
lastReply := replies[len(replies)-1]
|
||
nextCursor = cursor.NewCursor(
|
||
cursor.FormatTime(lastReply.CreatedAt),
|
||
lastReply.ID,
|
||
cursor.SortByCreatedAtAsc,
|
||
).Encode()
|
||
}
|
||
// 上一页游标
|
||
firstReply := replies[0]
|
||
prevCursor = cursor.NewCursor(
|
||
cursor.FormatTime(firstReply.CreatedAt),
|
||
firstReply.ID,
|
||
cursor.SortByCreatedAtAsc,
|
||
).Encode()
|
||
}
|
||
|
||
return cursor.NewCursorPageResult(replies, nextCursor, prevCursor, hasMore), nil
|
||
}
|