==  Regular User Comments on a Story

=== Actor: ** Regular User**
A regular user leaves a comment on a published story, and the writer receives a notification.

**1.** The regular user opens a published story and scrolls to the comments section.

**2.** The system displays all existing comments for the story.
{{{#!sql
SELECT c.comment_id, u.username, c.content, c.created_at
FROM COMMENT c
JOIN USERS u ON c.user_id = u.user_id
WHERE c.story_id = 1
ORDER BY c.created_at DESC;
}}}

**3.** The user types a comment and submits it.

**4.** The system inserts the new comment into the COMMENT table.
{{{#!sql
INSERT INTO COMMENT (content, user_id, story_id, created_at, updated_at)
VALUES ('This is absolutely breathtaking! The world-building is incredible!', 4, 1, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP);
}}}

**5.** The system creates a notification for the writer.
{{{#!sql
INSERT INTO NOTIFICATION (content, is_read, created_at)
VALUES ('Sara commented on your story "The Chronicles of Eldoria"', FALSE, CURRENT_TIMESTAMP);
}}}

**6.** The system records the notification type.
{{{#!sql
INSERT INTO CONTENT_TYPE (notification_id, content_type)
VALUES (2, 'comment');
}}}

**7.** The system links the notification to the writer.
{{{#!sql
INSERT INTO NOTIFY (user_id, story_id, notification_id)
VALUES (2, 1, 2);
}}}

**8.** The system displays the new comment immediately under the story.