feat: added notifications for post reactions

go-backend/internal/handlers/post_handler.go

@@ -779,6 +779,58 @@ func (h *PostHandler) ToggleReaction(c *gin.Context) {
 		return
 	}
 
+	// Check if reaction was added (exists in myReactions)
+	reactionAdded := false
+	for _, r := range myReactions {
+		if r == emoji {
+			reactionAdded = true
+			break
+		}
+	}
+
+	if reactionAdded {
+		go func() {
+			bgCtx := context.Background()
+			post, err := h.postRepo.GetPostByID(bgCtx, postID, userIDStr.(string))
+			if err != nil || post.AuthorID.String() == userIDStr.(string) {
+				return // Don't notify self
+			}
+
+			if h.notificationService != nil {
+				// Get actor details
+				actor, err := h.userRepo.GetProfileByID(bgCtx, userIDStr.(string))
+				if err != nil {
+					return
+				}
+
+				metadata := map[string]interface{}{
+					"actor_name": actor.DisplayName,
+					"post_id":    postID,
+					"emoji":      emoji,
+				}
+
+				// Using "like" type for now, or "quip_reaction" if quip
+				notifType := "like"
+				if post.VideoURL != nil && *post.VideoURL != "" {
+					notifType = "quip_reaction"
+					metadata["post_type"] = "quip"
+				} else {
+					metadata["post_type"] = "post"
+				}
+
+				h.notificationService.CreateNotification(
+					bgCtx,
+					post.AuthorID.String(),
+					userIDStr.(string),
+					notifType,
+					&postID,
+					nil,
+					metadata,
+				)
+			}
+		}()
+	}
+
 	c.JSON(http.StatusOK, gin.H{
 		"reactions":    counts,
 		"my_reactions": myReactions,