112 lines
4.2 KiB
Go
112 lines
4.2 KiB
Go
package sv
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import (
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"context"
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"fmt"
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"time"
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"github.com/LoveLosita/smartflow/backend/respond"
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forumdao "github.com/LoveLosita/smartflow/backend/services/taskclassforum/dao"
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forummodel "github.com/LoveLosita/smartflow/backend/services/taskclassforum/model"
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forumcontracts "github.com/LoveLosita/smartflow/backend/shared/contracts/taskclassforum"
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)
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// LikePost 点赞计划帖子。
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//
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// 职责边界：
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// 1. 负责保证同一用户同一帖子只有一个 active 点赞状态；
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// 2. 负责维护帖子 like_count 计数字段；
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// 3. 不直接发放 Token，只写稳定 event_id，后续奖励链路可基于该 ID 幂等消费。
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func (s *Service) LikePost(ctx context.Context, actorUserID uint64, postID uint64) (forumcontracts.ForumPostCounters, forumcontracts.ForumPostViewerState, error) {
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if err := s.Ready(); err != nil {
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return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, err
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}
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if actorUserID == 0 || postID == 0 {
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return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, respond.MissingParam
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}
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if err := s.forumDAO.Transaction(ctx, func(txDAO *forumdao.ForumDAO) error {
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post, err := txDAO.LockPublishedPost(ctx, postID)
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if err != nil {
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return normalizeRecordNotFound(err, respond.UserTaskClassNotFound)
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}
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like, err := txDAO.FindLike(ctx, postID, actorUserID)
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if err != nil {
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return err
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}
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if like == nil {
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return createActiveLike(ctx, txDAO, post, actorUserID)
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}
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if like.Status == forummodel.ForumLikeStatusActive {
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return nil
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}
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if err := txDAO.ActivateLike(ctx, like.ID); err != nil {
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return err
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}
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return txDAO.AddPostCounter(ctx, postID, "like_count", 1)
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}); err != nil {
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return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, err
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}
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return s.postInteractionState(ctx, actorUserID, postID)
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}
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// UnlikePost 取消计划帖子点赞。
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func (s *Service) UnlikePost(ctx context.Context, actorUserID uint64, postID uint64) (forumcontracts.ForumPostCounters, forumcontracts.ForumPostViewerState, error) {
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if err := s.Ready(); err != nil {
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return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, err
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}
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if actorUserID == 0 || postID == 0 {
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return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, respond.MissingParam
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}
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if err := s.forumDAO.Transaction(ctx, func(txDAO *forumdao.ForumDAO) error {
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if _, err := txDAO.LockPublishedPost(ctx, postID); err != nil {
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return normalizeRecordNotFound(err, respond.UserTaskClassNotFound)
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}
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like, err := txDAO.FindLike(ctx, postID, actorUserID)
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if err != nil {
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return err
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}
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if like == nil || like.Status != forummodel.ForumLikeStatusActive {
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return nil
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}
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if err := txDAO.CancelLike(ctx, like.ID, time.Now()); err != nil {
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return err
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}
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return txDAO.AddPostCounter(ctx, postID, "like_count", -1)
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}); err != nil {
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return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, err
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}
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return s.postInteractionState(ctx, actorUserID, postID)
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}
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func createActiveLike(ctx context.Context, txDAO *forumdao.ForumDAO, post *forummodel.ForumPost, actorUserID uint64) error {
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like := &forummodel.ForumLike{
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PostID: post.ID,
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UserID: actorUserID,
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AuthorUserID: post.AuthorUserID,
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Status: forummodel.ForumLikeStatusActive,
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EventID: forumLikeEventID(post.ID, actorUserID),
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}
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if err := txDAO.CreateLike(ctx, like); err != nil {
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return err
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}
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return txDAO.AddPostCounter(ctx, post.ID, "like_count", 1)
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}
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func (s *Service) postInteractionState(ctx context.Context, actorUserID uint64, postID uint64) (forumcontracts.ForumPostCounters, forumcontracts.ForumPostViewerState, error) {
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post, err := s.forumDAO.FindPublishedPost(ctx, postID)
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if err != nil {
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return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, normalizeRecordNotFound(err, respond.UserTaskClassNotFound)
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}
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liked, imported, err := s.viewerStateSets(ctx, actorUserID, []uint64{postID})
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if err != nil {
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return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, err
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}
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return countersFromPost(*post), viewerState(postID, liked, imported), nil
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}
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func forumLikeEventID(postID uint64, userID uint64) string {
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return fmt.Sprintf("forum.post.liked:%d:%d", postID, userID)
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}
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