feat: 接入论坛奖励 outbox 链路

backend/services/taskclassforum/sv/like.go

@@ -2,21 +2,21 @@ package sv
 
 import (
 	"context"
-	"fmt"
 	"time"
 
 	"github.com/LoveLosita/smartflow/backend/respond"
 	forumdao "github.com/LoveLosita/smartflow/backend/services/taskclassforum/dao"
 	forummodel "github.com/LoveLosita/smartflow/backend/services/taskclassforum/model"
 	forumcontracts "github.com/LoveLosita/smartflow/backend/shared/contracts/taskclassforum"
+	sharedevents "github.com/LoveLosita/smartflow/backend/shared/events"
 )
 
 // LikePost 点赞计划帖子。
 //
 // 职责边界：
-// 1. 负责保证同一用户同一帖子只有一个 active 点赞状态；
-// 2. 负责维护帖子 like_count 计数字段；
-// 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。
+// 1. 保证同一用户同一帖子只有一个 active 点赞状态；
+// 2. 维护帖子 like_count 计数字段；
+// 3. 只在首次创建 like 记录时补发 outbox 事件，取消后重新激活旧记录不重复发奖励。
 func (s *Service) LikePost(ctx context.Context, actorUserID uint64, postID uint64) (forumcontracts.ForumPostCounters, forumcontracts.ForumPostViewerState, error) {
 	if err := s.Ready(); err != nil {
 		return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, err
@@ -25,6 +25,7 @@ func (s *Service) LikePost(ctx context.Context, actorUserID uint64, postID uint6
 		return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, respond.MissingParam
 	}
 
+	var rewardPayload *sharedevents.ForumPostRewardPayload
 	if err := s.forumDAO.Transaction(ctx, func(txDAO *forumdao.ForumDAO) error {
 		post, err := txDAO.LockPublishedPost(ctx, postID)
 		if err != nil {
@@ -35,7 +36,19 @@ func (s *Service) LikePost(ctx context.Context, actorUserID uint64, postID uint6
 			return err
 		}
 		if like == nil {
-			return createActiveLike(ctx, txDAO, post, actorUserID)
+			payload, createErr := createActiveLike(ctx, txDAO, post, actorUserID)
+			if createErr != nil {
+				return createErr
+			}
+			// 调用目的：优先把首次点赞奖励事件写入当前事务，保证点赞记录和 outbox 入队原子提交。
+			handled, publishErr := s.publishForumRewardEventInTx(ctx, txDAO.GormDB(), payload)
+			if publishErr != nil {
+				return publishErr
+			}
+			if !handled {
+				rewardPayload = &payload
+			}
+			return nil
 		}
 		if like.Status == forummodel.ForumLikeStatusActive {
 			return nil
@@ -47,6 +60,10 @@ func (s *Service) LikePost(ctx context.Context, actorUserID uint64, postID uint6
 	}); err != nil {
 		return forumcontracts.ForumPostCounters{}, forumcontracts.ForumPostViewerState{}, err
 	}
+
+	if rewardPayload != nil {
+		s.publishForumRewardEventBestEffort(*rewardPayload)
+	}
 	return s.postInteractionState(ctx, actorUserID, postID)
 }
 
@@ -80,7 +97,7 @@ func (s *Service) UnlikePost(ctx context.Context, actorUserID uint64, postID uin
 	return s.postInteractionState(ctx, actorUserID, postID)
 }
 
-func createActiveLike(ctx context.Context, txDAO *forumdao.ForumDAO, post *forummodel.ForumPost, actorUserID uint64) error {
+func createActiveLike(ctx context.Context, txDAO *forumdao.ForumDAO, post *forummodel.ForumPost, actorUserID uint64) (sharedevents.ForumPostRewardPayload, error) {
 	like := &forummodel.ForumLike{
 		PostID:       post.ID,
 		UserID:       actorUserID,
@@ -89,9 +106,21 @@ func createActiveLike(ctx context.Context, txDAO *forumdao.ForumDAO, post *forum
 		EventID:      forumLikeEventID(post.ID, actorUserID),
 	}
 	if err := txDAO.CreateLike(ctx, like); err != nil {
-		return err
+		return sharedevents.ForumPostRewardPayload{}, err
 	}
-	return txDAO.AddPostCounter(ctx, post.ID, "like_count", 1)
+	if err := txDAO.AddPostCounter(ctx, post.ID, "like_count", 1); err != nil {
+		return sharedevents.ForumPostRewardPayload{}, err
+	}
+
+	likedAt := like.LikedAt
+	if likedAt.IsZero() {
+		likedAt = time.Now()
+	}
+	payload := sharedevents.NewForumPostLikedPayload(post.ID, post.AuthorUserID, actorUserID, likedAt)
+	if like.EventID != "" {
+		payload.EventID = like.EventID
+	}
+	return payload, nil
 }
 
 func (s *Service) postInteractionState(ctx context.Context, actorUserID uint64, postID uint64) (forumcontracts.ForumPostCounters, forumcontracts.ForumPostViewerState, error) {
@@ -107,5 +136,5 @@ func (s *Service) postInteractionState(ctx context.Context, actorUserID uint64,
 }
 
 func forumLikeEventID(postID uint64, userID uint64) string {
-	return fmt.Sprintf("forum.post.liked:%d:%d", postID, userID)
+	return sharedevents.ForumRewardEventID(sharedevents.ForumPostLikedEventType, postID, userID)
 }