Comment API

Objectives

The goals of comments 2.0:

• Manage comments centrally
• Use a consistent approach for all comments throughout Moodle
• Easily integrate comments 2.0 with existing modules

Overview

The comments 2.0 provides APIs to:

1. Add comments
2. Update comments

And provides an ajax interface to allow adding comments on a floating DIV.

Comments database table

Field	Type	Default	Info
id	int(10)	auto-incrementing	The unique ID for this comment.
user_id	int(10)		who wrote this comment
parent_id	int(10)		the ID for parent comment
contextid	int(10)		The context id defined in context table - identifies the instance of plugin owning the comment.
itemid	int(10)		Some plugin specific item id (eg. forum post, blog entry or assignment submission)
comment_area	int(10)		a comment should belong to a comment area
timecreated	int(10)
timemodified	int(10)
content	text		content of comment

Comments API

lib/weblib.php

function format_text_with_comments($text, $format=FORMAT_MOODLE, $options=NULL, $courseid=null, $cmt_options)

Use this function format text will add a comment icon automatically at the end of the text:

For example, use following code in format module will add comment icon to every post: $cmt = new stdclass; $cmt->contextid = $modcontext->id; $cmt->area = 'format_post'; $cmt->itemid = $post->id; $cmt->summary = substr(strip_tags($post->message), 0 ,10);

echo format_text_with_comments($post->message, $post->messageformat, $options, $course->id, $cmt)."

---

";

lib/commentlib.php

class comments()

print_comment_link($return = false)

Will print a comment icon, click it you will get commenting interface

print_comments($params = array())

print comments

add($content, $parent_id)

Add comment to database

delete($id)

delete a comment

edit($id, $content)

Edit a comment

Javascript API

Can be found in lib/javascript-static.js

do_comment(html_id, contextid, comment_area, itemid)

Create a new comment

reply_comment(html_id, contextid, comment_area, itemid, parent_id)

Reply a existed comment

submit_comment

Using AJAX to submit a comment or a reply

See also

• MDL-19118 - Comments 2.0 issue