lan
4d8f2ec997
Set up project files and add .gitignore to exclude local build/runtime artifacts. Made-with: Cursor
361 lines
11 KiB
Go
361 lines
11 KiB
Go
package repository
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import (
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"carrot_bbs/internal/model"
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"gorm.io/gorm"
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)
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// PostRepository 帖子仓储
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type PostRepository struct {
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db *gorm.DB
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}
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// NewPostRepository 创建帖子仓储
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func NewPostRepository(db *gorm.DB) *PostRepository {
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return &PostRepository{db: db}
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}
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// Create 创建帖子
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func (r *PostRepository) Create(post *model.Post, images []string) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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// 创建帖子
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if err := tx.Create(post).Error; err != nil {
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return err
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}
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// 创建图片记录
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for i, url := range images {
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image := &model.PostImage{
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PostID: post.ID,
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URL: url,
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SortOrder: i,
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}
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if err := tx.Create(image).Error; err != nil {
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return err
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}
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}
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return nil
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})
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}
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// GetByID 根据ID获取帖子
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func (r *PostRepository) GetByID(id string) (*model.Post, error) {
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var post model.Post
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err := r.db.Preload("User").Preload("Images").First(&post, "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 &post, nil
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}
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// Update 更新帖子
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func (r *PostRepository) Update(post *model.Post) error {
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return r.db.Save(post).Error
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}
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// UpdateModerationStatus 更新帖子审核状态
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func (r *PostRepository) UpdateModerationStatus(postID string, status model.PostStatus, rejectReason string, reviewedBy string) error {
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updates := map[string]interface{}{
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"status": status,
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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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}
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return r.db.Model(&model.Post{}).Where("id = ?", postID).Updates(updates).Error
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}
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// Delete 删除帖子（软删除，同时清理关联数据）
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func (r *PostRepository) Delete(id string) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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// 删除帖子图片
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if err := tx.Where("post_id = ?", id).Delete(&model.PostImage{}).Error; err != nil {
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return err
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}
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// 删除帖子点赞记录
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if err := tx.Where("post_id = ?", id).Delete(&model.PostLike{}).Error; err != nil {
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return err
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}
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// 删除帖子收藏记录
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if err := tx.Where("post_id = ?", id).Delete(&model.Favorite{}).Error; err != nil {
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return err
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}
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// 删除评论点赞记录（子查询获取该帖子所有评论ID）
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if err := tx.Where("comment_id IN (SELECT id FROM comments WHERE post_id = ?)", id).Delete(&model.CommentLike{}).Error; err != nil {
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return err
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}
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// 删除帖子评论
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if err := tx.Where("post_id = ?", id).Delete(&model.Comment{}).Error; err != nil {
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return err
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}
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// 最后删除帖子本身（软删除）
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return tx.Delete(&model.Post{}, "id = ?", id).Error
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})
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}
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// List 分页获取帖子列表
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func (r *PostRepository) List(page, pageSize int, userID string) ([]*model.Post, int64, error) {
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var posts []*model.Post
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var total int64
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query := r.db.Model(&model.Post{}).Where("status = ?", model.PostStatusPublished)
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if userID != "" {
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query = query.Where("user_id = ?", userID)
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}
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query.Count(&total)
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offset := (page - 1) * pageSize
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err := query.Preload("User").Preload("Images").Offset(offset).Limit(pageSize).Order("created_at DESC").Find(&posts).Error
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return posts, total, err
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}
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// GetUserPosts 获取用户帖子
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func (r *PostRepository) GetUserPosts(userID string, page, pageSize int) ([]*model.Post, int64, error) {
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var posts []*model.Post
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var total int64
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r.db.Model(&model.Post{}).Where("user_id = ? AND status = ?", userID, model.PostStatusPublished).Count(&total)
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offset := (page - 1) * pageSize
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err := r.db.Where("user_id = ? AND status = ?", userID, model.PostStatusPublished).Preload("User").Preload("Images").Offset(offset).Limit(pageSize).Order("created_at DESC").Find(&posts).Error
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return posts, total, err
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}
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// GetFavorites 获取用户收藏
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func (r *PostRepository) GetFavorites(userID string, page, pageSize int) ([]*model.Post, int64, error) {
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var posts []*model.Post
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var total int64
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subQuery := r.db.Model(&model.Favorite{}).Where("user_id = ?", userID).Select("post_id")
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r.db.Model(&model.Post{}).Where("id IN (?) AND status = ?", subQuery, model.PostStatusPublished).Count(&total)
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offset := (page - 1) * pageSize
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err := r.db.Where("id IN (?) AND status = ?", subQuery, model.PostStatusPublished).Preload("User").Preload("Images").Offset(offset).Limit(pageSize).Order("created_at DESC").Find(&posts).Error
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return posts, total, err
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}
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// Like 点赞帖子
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func (r *PostRepository) Like(postID, 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.PostLike
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err := tx.Where("post_id = ? AND user_id = ?", postID, userID).First(&existing).Error
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if err == nil {
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// 已经点赞，直接返回
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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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if err := tx.Create(&model.PostLike{
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PostID: postID,
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UserID: userID,
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}).Error; err != nil {
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return err
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}
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// 增加帖子点赞数并同步热度分
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return tx.Model(&model.Post{}).Where("id = ?", postID).
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Updates(map[string]interface{}{
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"likes_count": gorm.Expr("likes_count + 1"),
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"hot_score": gorm.Expr("(likes_count + 1) * 2 + comments_count * 3 + views_count * 0.1"),
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}).Error
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})
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}
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// Unlike 取消点赞
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func (r *PostRepository) Unlike(postID, userID string) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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result := tx.Where("post_id = ? AND user_id = ?", postID, userID).Delete(&model.PostLike{})
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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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// 减少帖子点赞数并同步热度分
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return tx.Model(&model.Post{}).Where("id = ?", postID).
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Updates(map[string]interface{}{
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"likes_count": gorm.Expr("likes_count - 1"),
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"hot_score": gorm.Expr("(likes_count - 1) * 2 + comments_count * 3 + views_count * 0.1"),
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}).Error
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}
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return nil
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})
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}
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// IsLiked 检查是否点赞
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func (r *PostRepository) IsLiked(postID, userID string) bool {
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var count int64
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r.db.Model(&model.PostLike{}).Where("post_id = ? AND user_id = ?", postID, userID).Count(&count)
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return count > 0
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}
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// Favorite 收藏帖子
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func (r *PostRepository) Favorite(postID, userID string) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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// 检查是否已经收藏
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var existing model.Favorite
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err := tx.Where("post_id = ? AND user_id = ?", postID, userID).First(&existing).Error
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if err == nil {
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// 已经收藏，直接返回
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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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// 创建收藏记录
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if err := tx.Create(&model.Favorite{
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PostID: postID,
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UserID: userID,
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}).Error; err != nil {
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return err
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}
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// 增加帖子收藏数
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return tx.Model(&model.Post{}).Where("id = ?", postID).
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UpdateColumn("favorites_count", gorm.Expr("favorites_count + 1")).Error
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})
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}
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// Unfavorite 取消收藏
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func (r *PostRepository) Unfavorite(postID, userID string) error {
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return r.db.Transaction(func(tx *gorm.DB) error {
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result := tx.Where("post_id = ? AND user_id = ?", postID, userID).Delete(&model.Favorite{})
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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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// 减少帖子收藏数
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return tx.Model(&model.Post{}).Where("id = ?", postID).
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UpdateColumn("favorites_count", gorm.Expr("favorites_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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// IsFavorited 检查是否收藏
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func (r *PostRepository) IsFavorited(postID, userID string) bool {
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var count int64
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r.db.Model(&model.Favorite{}).Where("post_id = ? AND user_id = ?", postID, userID).Count(&count)
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return count > 0
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}
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// IncrementViews 增加帖子观看量
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func (r *PostRepository) IncrementViews(postID string) error {
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return r.db.Model(&model.Post{}).Where("id = ?", postID).
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Updates(map[string]interface{}{
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"views_count": gorm.Expr("views_count + 1"),
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"hot_score": gorm.Expr("likes_count * 2 + comments_count * 3 + (views_count + 1) * 0.1"),
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}).Error
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}
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// Search 搜索帖子
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func (r *PostRepository) Search(keyword string, page, pageSize int) ([]*model.Post, int64, error) {
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var posts []*model.Post
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var total int64
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query := r.db.Model(&model.Post{}).Where("status = ?", model.PostStatusPublished)
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// 搜索标题和内容
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if keyword != "" {
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if r.db.Dialector.Name() == "postgres" {
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// PostgreSQL 使用全文检索表达式，为 pg_trgm/GIN 索引升级预留路径
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query = query.Where(
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"to_tsvector('simple', COALESCE(title, '') || ' ' || COALESCE(content, '')) @@ plainto_tsquery('simple', ?)",
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keyword,
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)
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} else {
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searchPattern := "%" + keyword + "%"
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query = query.Where("title LIKE ? OR content LIKE ?", searchPattern, searchPattern)
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}
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}
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query.Count(&total)
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offset := (page - 1) * pageSize
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err := query.Preload("User").Preload("Images").Offset(offset).Limit(pageSize).Order("created_at DESC").Find(&posts).Error
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return posts, total, err
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}
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// GetFollowingPosts 获取关注用户的帖子
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func (r *PostRepository) GetFollowingPosts(userID string, page, pageSize int) ([]*model.Post, int64, error) {
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var posts []*model.Post
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var total int64
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// 子查询：获取当前用户关注的所有用户ID
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subQuery := r.db.Model(&model.Follow{}).Where("follower_id = ?", userID).Select("following_id")
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// 统计总数
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r.db.Model(&model.Post{}).Where("user_id IN (?) AND status = ?", subQuery, model.PostStatusPublished).Count(&total)
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offset := (page - 1) * pageSize
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err := r.db.Where("user_id IN (?) AND status = ?", subQuery, model.PostStatusPublished).
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Preload("User").Preload("Images").
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Offset(offset).Limit(pageSize).
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Order("created_at DESC").
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Find(&posts).Error
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return posts, total, err
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}
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// GetHotPosts 获取热门帖子（按点赞数和评论数排序）
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func (r *PostRepository) GetHotPosts(page, pageSize int) ([]*model.Post, int64, error) {
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var posts []*model.Post
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var total int64
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r.db.Model(&model.Post{}).Where("status = ?", model.PostStatusPublished).Count(&total)
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offset := (page - 1) * pageSize
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// 热门排序使用预计算热度分，避免每次请求进行表达式排序计算
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err := r.db.Where("status = ?", model.PostStatusPublished).Preload("User").Preload("Images").
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Offset(offset).Limit(pageSize).
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Order("hot_score DESC, created_at DESC").
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Find(&posts).Error
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return posts, total, err
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}
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// GetByIDs 根据ID列表获取帖子（保持传入顺序）
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func (r *PostRepository) GetByIDs(ids []string) ([]*model.Post, error) {
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if len(ids) == 0 {
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return []*model.Post{}, nil
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}
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var posts []*model.Post
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err := r.db.Preload("User").Preload("Images").
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Where("id IN ? AND status = ?", ids, model.PostStatusPublished).
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Find(&posts).Error
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if err != nil {
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return nil, err
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}
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// 按传入ID顺序排序
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postMap := make(map[string]*model.Post)
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for _, post := range posts {
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postMap[post.ID] = post
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}
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ordered := make([]*model.Post, 0, len(ids))
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for _, id := range ids {
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if post, ok := postMap[id]; ok {
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ordered = append(ordered, post)
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}
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}
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return ordered, nil
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}
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