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352 lines
14 KiB
352 lines
14 KiB
<?php
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2006-2008 Dokeos S.A.
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Copyright (c) 2006 Ghent University (UGent)
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact address: Dokeos, 44 rue des palais, B-1030 Brussels, Belgium
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Mail: info@dokeos.com
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==============================================================================
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*/
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/**
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* These files are a complete rework of the forum. The database structure is
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* based on phpBB but all the code is rewritten. A lot of new functionalities
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* are added:
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* - forum categories and forums can be sorted up or down, locked or made invisible
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* - consistent and integrated forum administration
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* - forum options: are students allowed to edit their post?
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* moderation of posts (approval)
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* reply only forums (students cannot create new threads)
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* multiple forums per group
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* - sticky messages
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* - new view option: nested view
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* - quoting a message
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*
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* @Author Patrick Cool <patrick.cool@UGent.be>, Ghent University
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* @Copyright Ghent University
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* @Copyright Patrick Cool
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*
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* @package dokeos.forum
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*/
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/**
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**************************************************************************
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* IMPORTANT NOTICE
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* Please do not change anything is this code yet because there are still
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* some significant code that need to happen and I do not have the time to
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* merge files and test it all over again. So for the moment, please do not
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* touch the code
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* -- Patrick Cool <patrick.cool@UGent.be>
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**************************************************************************
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*/
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$rows=get_posts($_GET['thread']); // note: this has to be cleaned first
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$rows=calculate_children($rows);
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if ($_GET['post'])
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{
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$display_post_id=Security::remove_XSS($_GET['post']); // note: this has to be cleaned first
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}
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else
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{
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// we need to display the first post
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reset($rows);
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$current=current($rows);
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$display_post_id=$current['post_id'];
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}
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// --------------------------------------
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// Displaying the thread (structure)
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// --------------------------------------
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$thread_structure="<div class=\"structure\">".get_lang('Structure')."</div>";
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$counter=0;
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$prev_next_array=array();
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foreach ($rows as $post)
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{
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$counter++;
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$indent=$post['indent_cnt']*'20';
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$thread_structure.= "<div style=\"margin-left: ".$indent."px;\">";
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if (isset($whatsnew_post_info[$current_forum['forum_id']][$current_thread['thread_id']][$post['post_id']]) and !empty($whatsnew_post_info[$current_forum['forum_id']][$current_thread['thread_id']][$post['post_id']]) and !empty($whatsnew_post_info[$_GET['forum']][$post['thread_id']]))
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{
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$post_image=icon('../img/forumpostnew.gif');
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}
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else
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{
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$post_image=icon('../img/forumpost.gif');
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}
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$thread_structure.= $post_image;
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if ($_GET['post']==$post['post_id'] OR ($counter==1 AND !isset($_GET['post'])))
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{
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$thread_structure.='<strong>'.prepare4display($post['post_title']).'</strong></div>';
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$prev_next_array[]=$post['post_id'];
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}
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else
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{
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if ($post['visible']=='0')
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{
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$class=' class="invisible"';
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}
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else
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{
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$class='';
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}
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$thread_structure.= "<a href=\"viewthread.php?".api_get_cidreq()."&forum=".Security::remove_XSS($_GET['forum'])."&thread=".Security::remove_XSS($_GET['thread'])."&post=".$post['post_id']."\" $class>".prepare4display($post['post_title'])."</a></div>\n";
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$prev_next_array[]=$post['post_id'];
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}
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}
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/*--------------------------------------------------
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NAVIGATION CONTROLS
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----------------------------------------------------
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*/
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$current_id=array_search($display_post_id,$prev_next_array);
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$max=count($prev_next_array);
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$next_id=$current_id+1;
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$prev_id=$current_id-1;
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$firs_message=get_lang('FirstMessage');
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$prev_message=get_lang('PrevMessage');
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$next_message=get_lang('NextMessage');
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$prev_message=get_lang('PrevMessage');
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$prev_img = '<img src="'.api_get_path(WEB_CODE_PATH).'img/prev.png" style="vertical-align: middle;"/>';
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$next_img = '<img src="'.api_get_path(WEB_CODE_PATH).'img/next.png" style="vertical-align: middle;"/>';
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$first_page_text = '<img src="'.api_get_path(WEB_CODE_PATH).'img/first.png" style="vertical-align: middle;"/>';
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$last_page_text = '<img src="'.api_get_path(WEB_CODE_PATH).'img/last.png" style="vertical-align: middle;"/>';
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$href_prev='"viewthread.php?'.api_get_cidreq().'&forum='.Security::remove_XSS($_GET['forum']).'&thread='.Security::remove_XSS($_GET['thread']).'&post='.$prev_next_array[$prev_id].'"';
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$href_next='"viewthread.php?'.api_get_cidreq().'&forum='.Security::remove_XSS($_GET['forum']).'&thread='.Security::remove_XSS($_GET['thread']).'&post='.$prev_next_array[$next_id].'"';
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// the last message
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if ($next_id>=$max)
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{
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$next_id=0;
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$class_next=' class="invisible"';
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$href_next=1;
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}
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// the first message
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if ($next_id==1) {
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$class_prev=' class="invisible"';
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$href_prev=1;
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}
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echo '<center>';
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// for the loop
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if ($prev_id<0)
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{
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$prev_id=$max-1;
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}
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//first message img
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echo '<a title="'.get_lang('FirstMessage').'" href="viewthread.php?'.api_get_cidreq()."&forum=".Security::remove_XSS($_GET['forum'])."&thread=".Security::remove_XSS($_GET['thread'])."&post=".$prev_next_array[0]."\" $class>".$first_page_text."</a>";
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// prev message link
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if ($href_prev==1)
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{
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echo '<b><span '.$class_prev.' >'.$prev_message.'</b></span>';
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}
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else
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echo '<a href='.$href_prev.' '.$class_prev.' >'.$prev_message.'</a>';
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// current counter
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echo ' [ '.($current_id+1).' / '.$max.' ] ';
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// next message link
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if ($href_next==1)
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{
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echo '<b><span '.$class_next.' >'.$next_message.'</span></b>';
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}
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else
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echo '<a href='.$href_next.' '.$class_next.' >'.$next_message.'</a>';
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//last message img
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echo '<a title="'.get_lang('LastMessage').'" href="viewthread.php?'.api_get_cidreq()."&forum=".Security::remove_XSS($_GET['forum'])."&thread=".Security::remove_XSS($_GET['thread'])."&post=".$prev_next_array[$max-1]."\" $class>".$last_page_text."</a>";
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echo '</center>';
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//--------------------------------------------------------------------------------------------
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// the style depends on the status of the message: approved or not
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if ($rows[$display_post_id]['visible']=='0')
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{
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$titleclass='forum_message_post_title_2_be_approved';
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$messageclass='forum_message_post_text_2_be_approved';
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$leftclass='forum_message_left_2_be_approved';
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}
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else
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{
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$titleclass='forum_message_post_title';
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$messageclass='forum_message_post_text';
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$leftclass='forum_message_left';
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}
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// --------------------------------------
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// Displaying the message
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// --------------------------------------
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// we mark the image we are displaying as set
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unset($whatsnew_post_info[$current_forum['forum_id']][$current_thread['thread_id']][$rows[$display_post_id]['post_id']]);
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echo "<table width=\"100%\" class=\"post\" cellspacing=\"5\" border=\"0\">\n";
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echo "\t<tr>\n";
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echo "\t\t<td rowspan=\"3\" class=\"$leftclass\">";
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if ($rows[$display_post_id]['user_id']=='0')
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{
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$name=prepare4display($rows[$display_post_id]['poster_name']);
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}
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else
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{
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$name=$rows[$display_post_id]['firstname'].' '.$rows[$display_post_id]['lastname'];
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}
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if (api_get_course_setting('allow_user_image_forum')) {echo '<br />'.display_user_image($rows[$display_post_id]['user_id'],$name,false,true).'<br />'; }
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echo display_user_link($rows[$display_post_id]['user_id'], $name).'<br />';
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echo $rows[$display_post_id]['post_date'].'<br /><br />';
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// The user who posted it can edit his thread only if the course admin allowed this in the properties of the forum
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// The course admin him/herself can do this off course always
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if (($current_forum['allow_edit']==1 AND $rows[$display_post_id]['user_id']==$_user['user_id']) or api_is_allowed_to_edit())
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{
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echo "<a href=\"editpost.php?".api_get_cidreq()."&forum=".Security::remove_XSS($_GET['forum'])."&thread=".Security::remove_XSS($_GET['thread'])."&post=".$rows[$display_post_id]['post_id']."\">".icon('../img/edit.gif',get_lang('Edit'))."</a>\n";
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}
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if (api_is_allowed_to_edit())
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{
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echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&forum=".Security::remove_XSS($_GET['forum'])."&thread=".Security::remove_XSS($_GET['thread'])."&action=delete&content=post&id=".$rows[$display_post_id]['post_id']."\" onclick=\"javascript:if(!confirm('".addslashes(htmlentities(get_lang("DeletePost"),ENT_QUOTES,$charset))."')) return false;\">".icon('../img/delete.gif',get_lang('Delete'))."</a>\n";
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display_visible_invisible_icon('post', $rows[$display_post_id]['post_id'], $rows[$display_post_id]['visible'],array('forum'=>Security::remove_XSS($_GET['forum']),'thread'=>Security::remove_XSS($_GET['thread']), 'post'=>Security::remove_XSS($_GET['post']) ));
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echo "\n";
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echo "<a href=\"viewthread.php?".api_get_cidreq()."&forum=".Security::remove_XSS($_GET['forum'])."&thread=".Security::remove_XSS($_GET['thread'])."&action=move&post=".$rows[$display_post_id]['post_id']."\">".icon('../img/deplacer_fichier.gif',get_lang('MovePost'))."</a>\n";
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}
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echo '<br /><br />';
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//if (($current_forum_category['locked']==0 AND $current_forum['locked']==0 AND $current_thread['locked']==0) OR api_is_allowed_to_edit())
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if ($current_forum_category['locked']==0 AND $current_forum['locked']==0 AND $current_thread['locked']==0 OR api_is_allowed_to_edit())
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{
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if ($_user['user_id'] OR ($current_forum['allow_anonymous']==1 AND !$_user['user_id']))
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{
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echo '<a href="reply.php?'.api_get_cidreq().'&forum='.Security::remove_XSS($_GET['forum']).'&thread='.Security::remove_XSS($_GET['thread']).'&post='.$rows[$display_post_id]['post_id'].'&action=replymessage">'.get_lang('ReplyToMessage').'</a><br />';
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echo '<a href="reply.php?'.api_get_cidreq().'&forum='.Security::remove_XSS($_GET['forum']).'&thread='.Security::remove_XSS($_GET['thread']).'&post='.$rows[$display_post_id]['post_id'].'&action=quote">'.get_lang('QuoteMessage').'</a><br /><br />';
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}
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}
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else
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{
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if ($current_forum_category['locked']==1)
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{
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echo get_lang('ForumcategoryLocked').'<br />';
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}
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if ($current_forum['locked']==1)
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{
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echo get_lang('ForumLocked').'<br />';
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}
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if ($current_thread['locked']==1)
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{
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echo get_lang('ThreadLocked').'<br />';
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}
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}
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echo "</td>\n";
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// note: this can be removed here because it will be displayed in the tree
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if (isset($whatsnew_post_info[$current_forum['forum_id']][$current_thread['thread_id']][$rows[$display_post_id]['post_id']]) and !empty($whatsnew_post_info[$current_forum['forum_id']][$current_thread['thread_id']][$rows[$display_post_id]['post_id']]) and !empty($whatsnew_post_info[$_GET['forum']][$rows[$display_post_id]['thread_id']]))
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{
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$post_image=icon('../img/forumpostnew.gif');
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}
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else
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{
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$post_image=icon('../img/forumpost.gif');
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}
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if ($rows[$display_post_id]['post_notification']=='1' AND $rows[$display_post_id]['poster_id']==$_user['user_id'])
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{
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$post_image.=icon('../img/forumnotification.gif',get_lang('YouWillBeNotified'));
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}
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// The post title
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echo "\t\t<td class=\"$titleclass\">".prepare4display($rows[$display_post_id]['post_title'])."</td>\n";
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echo "\t</tr>\n";
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// The post message
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echo "\t<tr>\n";
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echo "\t\t<td class=\"$messageclass\">".prepare4display($rows[$display_post_id]['post_text'])."</td>\n";
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echo "\t</tr>\n";
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// The check if there is an attachment
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$attachment_list=get_attachment($display_post_id);
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if (!empty($attachment_list))
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{
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echo '<tr><td height="50%">';
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$realname=$attachment_list['path'];
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$user_filename=$attachment_list['filename'];
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echo Display::return_icon('attachment.gif',get_lang('Attachment'));
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echo '<a href="download.php?file=';
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echo $realname;
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echo ' "> '.$user_filename.' </a>';
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echo '<span class="forum_attach_comment" >'.$attachment_list['comment'].'</span><br />';
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echo '</td></tr>';
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}
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// The post has been displayed => it can be removed from the what's new array
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unset($whatsnew_post_info[$current_forum['forum_id']][$current_thread['thread_id']][$row['post_id']]);
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unset($_SESSION['whatsnew_post_info'][$current_forum['forum_id']][$current_thread['thread_id']][$row['post_id']]);
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echo "</table>";
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// --------------------------------------
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// Displaying the thread (structure)
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// --------------------------------------
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echo $thread_structure;
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/**
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* This function builds an array of all the posts in a given thread where the key of the array is the post_id
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* It also adds an element children to the array which itself is an array that contains all the id's of the first-level children
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* @return an array containing all the information on the posts of a thread
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* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
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*/
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function calculate_children($rows)
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{
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foreach($rows as $row)
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{
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$rows_with_children[$row["post_id"]]=$row;
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$rows_with_children[$row["post_parent_id"]]["children"][]=$row["post_id"];
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}
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$rows=$rows_with_children;
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$sorted_rows=array(0=>array());
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_phorum_recursive_sort($rows, $sorted_rows);
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unset($sorted_rows[0]);
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return $sorted_rows;
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}
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function _phorum_recursive_sort($rows, &$threads, $seed=0, $indent=0)
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{
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if($seed>0)
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{
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$threads[$rows[$seed]["post_id"]]=$rows[$seed];
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$threads[$rows[$seed]["post_id"]]["indent_cnt"]=$indent;
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$indent++;
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}
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if(isset($rows[$seed]["children"]))
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{
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foreach($rows[$seed]["children"] as $child)
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{
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_phorum_recursive_sort($rows, $threads, $child, $indent);
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}
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}
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}
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?>
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