Add delete comment functionality with confirmation dialog.

server/api/comment.go

@@ -15,6 +15,7 @@ func AddCommentRoutes(router fiber.Router) {
 	api.Get("/:resourceID", listComments)
 	api.Get("/user/:username", listCommentsWithUser)
 	api.Put("/:commentID", updateComment)
+	api.Delete("/:commentID", deleteComment)
 }
 
 func createComment(c fiber.Ctx) error {
@@ -115,3 +116,23 @@ func updateComment(c fiber.Ctx) error {
 		Message: "Comment updated successfully",
 	})
 }
+
+func deleteComment(c fiber.Ctx) error {
+	userID, ok := c.Locals("uid").(uint)
+	if !ok {
+		return model.NewRequestError("You must be logged in to delete comment")
+	}
+	commentIDStr := c.Params("commentID")
+	commentID, err := strconv.Atoi(commentIDStr)
+	if err != nil {
+		return model.NewRequestError("Invalid comment ID")
+	}
+	err = service.DeleteComment(uint(commentID), userID)
+	if err != nil {
+		return err
+	}
+	return c.JSON(model.Response[any]{
+		Success: true,
+		Message: "Comment deleted successfully",
+	})
+}

server/dao/comment.go

@@ -83,3 +83,25 @@ func UpdateCommentContent(commentID uint, content string) (*model.Comment, error
 	db.Preload("User").First(&comment, commentID)
 	return &comment, nil
 }
+
+func DeleteCommentByID(commentID uint) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		var comment model.Comment
+		if err := tx.First(&comment, commentID).Error; err != nil {
+			return err
+		}
+		if err := tx.Delete(&comment).Error; err != nil {
+			return err
+		}
+		if err := tx.Model(&model.User{}).Where("id = ?", comment.UserID).Update("comments_count", gorm.Expr("comments_count - 1")).Error; err != nil {
+			return err
+		}
+		if err := tx.
+			Where("type = ? and ref_id = ?", model.ActivityTypeNewComment, commentID).
+			Delete(&model.Activity{}).
+			Error; err != nil {
+			return err
+		}
+		return nil
+	})
+}

server/service/comment.go

@@ -84,3 +84,17 @@ func UpdateComment(commentID, userID uint, content string) (*model.CommentView,
 	}
 	return updated.ToView(), nil
 }
+
+func DeleteComment(commentID, userID uint) error {
+	comment, err := dao.GetCommentByID(commentID)
+	if err != nil {
+		return model.NewNotFoundError("Comment not found")
+	}
+	if comment.UserID != userID {
+		return model.NewRequestError("You can only delete your own comments")
+	}
+	if err := dao.DeleteCommentByID(commentID); err != nil {
+		return model.NewInternalServerError("Error deleting comment")
+	}
+	return nil
+}