click-comment.php

<?php
/*
	Question2Answer by Gideon Greenspan and contributors
	http://www.question2answer.org/

	File: qa-include/qa-ajax-click-comment.php
	Description: Server-side response to Ajax single clicks on comments


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

	require_once QA_INCLUDE_DIR.'app/cookies.php';
	require_once QA_INCLUDE_DIR.'app/format.php';
	require_once QA_INCLUDE_DIR.'app/users.php';
	require_once QA_INCLUDE_DIR.'db/selects.php';
	require_once QA_INCLUDE_DIR.'pages/question-view.php';
	require_once QA_INCLUDE_DIR.'pages/question-submit.php';


//	Load relevant information about this comment

	$commentid=qa_post_text('commentid');
	$questionid=qa_post_text('questionid');
	$parentid=qa_post_text('parentid');

	$userid=qa_get_logged_in_userid();

	list($comment, $question, $parent, $children)=qa_db_select_with_pending(
		qa_db_full_post_selectspec($userid, $commentid),
		qa_db_full_post_selectspec($userid, $questionid),
		qa_db_full_post_selectspec($userid, $parentid),
		qa_db_full_child_posts_selectspec($userid, $parentid)
	);


//	Check if there was an operation that succeeded

	if (
		(@$comment['basetype']=='C') &&
		(@$question['basetype']=='Q') &&
		((@$parent['basetype']=='Q') || (@$parent['basetype']=='A'))
	) {
		$comment=$comment+qa_page_q_post_rules($comment, $parent, $children, null); // array union

		if (qa_page_q_single_click_c($comment, $question, $parent, $error)) {
			$comment=qa_db_select_with_pending(qa_db_full_post_selectspec($userid, $commentid));


		//	If so, page content to be updated via Ajax

			echo "QA_AJAX_RESPONSE\n1";


		//	If the comment was not deleted...

			if (isset($comment)) {
				$parent=$parent+qa_page_q_post_rules($parent, ($questionid==$parentid) ? null : $question, null, $children);
					// in theory we should retrieve the parent's siblings for the above, but they're not going to be relevant
				$comment=$comment+qa_page_q_post_rules($comment, $parent, $children, null);

				$usershtml=qa_userids_handles_html(array($comment), true);

				$c_view=qa_page_q_comment_view($question, $parent, $comment, $usershtml, false);

				$themeclass=qa_load_theme_class(qa_get_site_theme(), 'ajax-comment', null, null);
				$themeclass->initialize();


			//	... send back the HTML for it

				echo "\n";

				$themeclass->c_list_item($c_view);
			}

			return;
		}
	}


	echo "QA_AJAX_RESPONSE\n0\n"; // fall back to non-Ajax submission if something failed


/*
	Omit PHP closing tag to help avoid accidental output
*/