Chamilo is a learning management system focused on ease of use and accessibility
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chamilo-lms/main/forum/viewforum.php

437 lines
23 KiB

<?php
/* For licensing terms, see /license.txt */
/**
* These files are a complete rework of the forum. The database structure is
* based on phpBB but all the code is rewritten. A lot of new functionalities
* are added:
* - forum categories and forums can be sorted up or down, locked or made invisible
* - consistent and integrated forum administration
* - forum options: are students allowed to edit their post?
* moderation of posts (approval)
* reply only forums (students cannot create new threads)
* multiple forums per group
* - sticky messages
* - new view option: nested view
* - quoting a message
*
* @Author Patrick Cool <patrick.cool@UGent.be>, Ghent University
* @Copyright Ghent University
* @Copyright Patrick Cool
*
* @package chamilo.forum
*/
// Language files that need to be included.
$language_file = array('forum', 'group');
// Including the global initialization file.
require_once '../inc/global.inc.php';
// Notification for unauthorized people.
api_protect_course_script(true);
// The section (tabs).
$this_section = SECTION_COURSES;
// Including additional library scripts.
require_once api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php';
require_once api_get_path(LIBRARY_PATH).'groupmanager.lib.php';
$nameTools = get_lang('ToolForum');
// Are we in a lp ?
$origin = '';
$origin_string = '';
if (isset($_GET['origin'])) {
$origin = Security::remove_XSS($_GET['origin']);
$origin_string = '&amp;origin='.$origin;
}
/* Including necessary files */
require 'forumconfig.inc.php';
require_once 'forumfunction.inc.php';
$userid = api_get_user_id();
$userinf = api_get_user_info($userid);
/* MAIN DISPLAY SECTION */
/* Retrieving forum and forum category information */
// We are getting all the information about the current forum and forum category.
// Note pcool: I tried to use only one sql statement (and function) for this,
// but the problem is that the visibility of the forum AND forum cateogory are stored in the item_property table.
$my_forum_group = isset($_GET['gidReq']) ? $_GET['gidReq'] : '';
$my_forum = isset($_GET['forum']) ? $_GET['forum'] : '';
$val = GroupManager::user_has_access($userid, $my_forum_group, GROUP_TOOL_FORUM);
if (!empty($my_forum_group)) {
if (api_is_allowed_to_edit(false, true) || $val) {
$current_forum = get_forum_information($my_forum); // Note: This has to be validated that it is an existing forum.
$current_forum_category = get_forumcategory_information($current_forum['forum_category']);
}
} else {
$result = get_forum_information($my_forum);
if ($result['forum_of_group'] == 0) {
$current_forum = get_forum_information($my_forum); // Note: This has to be validated that it is an existing forum.
$current_forum_category = get_forumcategory_information($current_forum['forum_category']);
}
}
/* Header and Breadcrumbs */
$my_search = isset($_GET['search']) ? $_GET['search'] : '';
$my_action = isset($_GET['action']) ? $_GET['action'] : '';
if (isset($_SESSION['gradebook'])){
$gradebook = $_SESSION['gradebook'];
}
if (!empty($gradebook) && $gradebook == 'view') {
$interbreadcrumb[] = array (
'url' => '../gradebook/'.$_SESSION['gradebook_dest'],
'name' => get_lang('ToolGradebook')
);
}
if (!empty($_GET['gidReq'])) {
$toolgroup = Database::escape_string($_GET['gidReq']);
api_session_register('toolgroup');
}
if ($origin == 'group') {
$_clean['toolgroup'] = (int)$_SESSION['toolgroup'];
$group_properties = GroupManager :: get_group_properties($_clean['toolgroup']);
$interbreadcrumb[] = array('url' => '../group/group.php', 'name' => get_lang('Groups'));
$interbreadcrumb[] = array('url'=>'../group/group_space.php?gidReq='.$_SESSION['toolgroup'], 'name'=> get_lang('GroupSpace').' '.$group_properties['name']);
$interbreadcrumb[] = array('url' => '#', 'name' => get_lang('Forum').' '.Security::remove_XSS($current_forum['forum_title']));
} else {
$interbreadcrumb[] = array('url' => 'index.php?gradebook='.$gradebook.'&amp;search='.Security::remove_XSS($my_search), 'name' => get_lang('ForumCategories'));
$interbreadcrumb[] = array('url' => 'viewforumcategory.php?forumcategory='.$current_forum_category['cat_id'].'&amp;search='.Security::remove_XSS(urlencode($my_search)), 'name' => prepare4display($current_forum_category['cat_title']));
$interbreadcrumb[] = array('url' => '#', 'name' => Security::remove_XSS($current_forum['forum_title']));
}
if ($origin == 'learnpath') {
include api_get_path(INCLUDE_PATH).'reduced_header.inc.php';
} else {
// The last element of the breadcrumb navigation is already set in interbreadcrumb, so give empty string.
Display :: display_header('');
//api_display_tool_title($nameTools);
}
/* Actions */
$table_link = Database :: get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
// Change visibility of a forum or a forum category.
if (($my_action == 'invisible' OR $my_action=='visible') AND isset($_GET['content']) AND isset($_GET['id']) AND api_is_allowed_to_edit(false, true) && api_is_allowed_to_session_edit(false, true)) {
$message = change_visibility($_GET['content'], $_GET['id'], $_GET['action']); // Note: This has to be cleaned first.
}
// Locking and unlocking.
if (($my_action == 'lock' OR $my_action == 'unlock') AND isset($_GET['content']) AND isset($_GET['id']) AND api_is_allowed_to_edit(false, true) && api_is_allowed_to_session_edit(false, true)) {
$message = change_lock_status($_GET['content'], $_GET['id'], $my_action); // Note: This has to be cleaned first.
}
// Deleting.
if ($my_action == 'delete' AND isset($_GET['content']) AND isset($_GET['id']) AND api_is_allowed_to_edit(false, true) && api_is_allowed_to_session_edit(false, true)) {
$message = delete_forum_forumcategory_thread($_GET['content'], $_GET['id']); // Note: This has to be cleaned first.
// Delete link
/*$sql_link = 'DELETE FROM '.$table_link.' WHERE ref_id='.intval($_GET['id']).' and type=5 and course_code="'.api_get_course_id().'";';
Database::query($sql_link);*/
require_once api_get_path(SYS_CODE_PATH).'gradebook/lib/gradebook_functions.inc.php';
$link_id = is_resource_in_course_gradebook(api_get_course_id(), 5 , intval($_GET['id']), api_get_session_id());
if ($link_id !== false) {
remove_resource_from_course_gradebook($link_id);
}
}
// Moving.
if ($my_action == 'move' AND isset($_GET['thread']) AND api_is_allowed_to_edit(false, true) && api_is_allowed_to_session_edit(false, true)) {
$message = move_thread_form();
}
// Notification.
if ($my_action == 'notify' AND isset($_GET['content']) AND isset($_GET['id']) && api_is_allowed_to_session_edit(false, true)) {
$return_message = set_notification($_GET['content'], $_GET['id']);
Display :: display_confirmation_message($return_message, false);
}
// Student list
if ($my_action == 'liststd' AND isset($_GET['content']) AND isset($_GET['id']) AND api_is_allowed_to_edit(null, true)) {
switch($_GET['list']) {
case 'qualify':
$student_list = get_thread_users_qualify($_GET['id']);
$nrorow3 = -2;
break;
case 'notqualify':
$student_list = get_thread_users_not_qualify($_GET['id']);
$nrorow3 = -2;
break;
default:
$student_list = get_thread_users_details($_GET['id']);
$nrorow3 = Database::num_rows($student_list);
break;
}
$table_list = '<p><br /><h3>'.get_lang('ThreadUsersList').': '.get_name_thread_by_id($_GET['id']).'</h3>';
if ($nrorow3 > 0 || $nrorow3 == -2) {
$url = 'cidReq='.Security::remove_XSS($_GET['cidReq']).'&amp;forum='.Security::remove_XSS($my_forum).'&amp;action='.Security::remove_XSS($_GET['action']).'&amp;content='.Security::remove_XSS($_GET['content'],STUDENT).'&amp;id='.Security::remove_XSS($_GET['id']);
$table_list .= '<br />
<div style="width:50%">
<table class="data_table" border="0">
<tr>
<th height="22"><a href="viewforum.php?'.$url.'&amp;origin='.$origin.'&amp;list=all">'.get_lang('AllStudents').'</a></th>
<th><a href="viewforum.php?'.$url.'&amp;origin='.$origin.'&amp;list=qualify">'.get_lang('StudentsQualified').'</a></th>
<th><a href="viewforum.php?'.$url.'&amp;origin='.$origin.'&amp;list=notqualify">'.get_lang('StudentsNotQualified').'</a></th>
</tr>
</table></div>
<div style="border:1px solid gray; width:99%; margin-top:5px; padding:4px; float:left">
';
$icon_qualify = 'blog_new.gif';
$table_list .= '<center><br /><table class="data_table" style="width:50%">';
// The column headers (TODO: Make this sortable).
$table_list .= '<tr >';
$table_list .= '<th height="24">'.get_lang('NamesAndLastNames').'</th>';
if ($_GET['list'] == 'qualify') {
$table_list.= '<th>'.get_lang('Qualification').'</th>';
}
if (api_is_allowed_to_edit(null, true)) {
$table_list.= '<th>'.get_lang('Qualify').'</th>';
}
$table_list .= '</tr>';
$max_qualify = show_qualify('2', $_GET['cidReq'], $my_forum, $userid, $_GET['id']);
$counter_stdlist = 0;
if (Database::num_rows($student_list) > 0) {
while ($row_student_list=Database::fetch_array($student_list)) {
if ($counter_stdlist % 2 == 0) {
$class_stdlist = 'row_odd';
} else {
$class_stdlist = 'row_even';
}
$name_user_theme = api_get_person_name($row_student_list['firstname'], $row_student_list['lastname']);
$table_list .= '<tr class="'.$class_stdlist.'"><td><a href="../user/userInfo.php?uInfo='.$row_student_list['user_id'].'&amp;tipo=sdtlist&amp;'.api_get_cidreq().'&amp;gidReq='.Security::remove_XSS($_GET['gidReq']).'&amp;forum='.Security::remove_XSS($my_forum).$origin_string.'">'.$name_user_theme.'</a></td>';
if ($_GET['list'] == 'qualify') {
$table_list .= '<td>'.$row_student_list['qualify'].'/'.$max_qualify.'</td>';
}
if (api_is_allowed_to_edit(null, true)) {
$current_qualify_thread = show_qualify('1', $_GET['cidReq'], $my_forum, $row_student_list['user_id'], $_GET['id']);
$table_list .= '<td><a href="forumqualify.php?'.api_get_cidreq().'&amp;gidReq='.Security::remove_XSS($_GET['gidReq']).'&amp;forum='.Security::remove_XSS($my_forum).'&amp;thread='.Security::remove_XSS($_GET['id']).'&amp;user='.$row_student_list['user_id'].'&amp;user_id='.$row_student_list['user_id'].'&amp;idtextqualify='.$current_qualify_thread.'&amp;origin='.$origin.'">'.Display::return_icon($icon_qualify, get_lang('Qualify')).'</a></td></tr>';
}
$counter_stdlist++;
}
} else {
if ($_GET['list'] == 'qualify') {
$table_list .= '<tr><td colspan="2">'.get_lang('ThereIsNotQualifiedLearners').'</td></tr>';
} else {
$table_list .= '<tr><td colspan="2">'.get_lang('ThereIsNotUnqualifiedLearners').'</td></tr>';
}
}
$table_list .= '</table></center>';
$table_list .= '<br /></div>';
} else {
$table_list .= get_lang('NoParticipation');
}
}
/* Is the user allowed here? */
// If the user is not a course administrator and the forum is hidden
// then the user is not allowed here.
if (!api_is_allowed_to_edit(false, true) AND ($current_forum_category['visibility'] == 0 OR $current_forum['visibility'] == 0)) {
$forum_allow = forum_not_allowed_here();
if ($forum_allow === false) {
exit;
}
}
if ($origin == 'learnpath') {
echo '<div style="height:15px">&nbsp;</div>';
}
/* Display the action messages */
if (!empty($message)) {
Display :: display_confirmation_message($message);
}
/* Action links */
if ($origin != 'learnpath') {
echo '<div class="actions">';
if ($origin=='group') {
echo '<a href="../group/group_space.php?'.api_get_cidreq().'&amp;gidReq='.Security::remove_XSS($_GET['gidReq']).'&amp;gradebook='.$gradebook.'">'.Display::return_icon('back.png',get_lang('BackTo').' '.get_lang('Groups'),'','32').'</a>';
} else {
echo '<span style="float:right;">'.search_link().'</span>';
echo '<a href="index.php">'.Display::return_icon('back.png', get_lang('BackToForumOverview'), '', '32').'</a>';
}
// The link should appear when
// 1. the course admin is here
// 2. the course member is here and new threads are allowed
// 3. a visitor is here and new threads AND allowed AND anonymous posts are allowed
if (api_is_allowed_to_edit(false, true) OR ($current_forum['allow_new_threads'] == 1 AND isset($_user['user_id'])) OR ($current_forum['allow_new_threads'] == 1 AND !isset($_user['user_id']) AND $current_forum['allow_anonymous'] == 1)) {
if ($current_forum['locked'] <> 1 AND $current_forum['locked'] <> 1) {
if (!api_is_anonymous()) {
if ($my_forum == strval(intval($my_forum))) {
echo '<a href="newthread.php?'.api_get_cidreq().'&amp;gidReq='.Security::remove_XSS($_GET['gidReq']).'&amp;forum='.Security::remove_XSS($my_forum).$origin_string.'">'.Display::return_icon('new_thread.png',get_lang('NewTopic'),'','32').'</a>';
} else {
$my_forum = strval(intval($my_forum));
echo '<a href="newthread.php?'.api_get_cidreq().'&amp;gidReq='.Security::remove_XSS($_GET['gidReq']).'&amp;forum='.$my_forum.$origin_string.'">'.Display::return_icon('new_thread.png',get_lang('NewTopic'),'','32').'</a>';
}
}
} else {
echo get_lang('ForumLocked');
}
}
echo '</div>';
}
/* Display */
echo '<table class="forum_table" >';
// The current forum
if ($origin != 'learnpath') {
echo '<thead><tr><th class="forum_head" colspan="7">';
if (!empty ($current_forum_category['cat_title'])) {
//echo '<span class="forum_low_description">'.prepare4display($current_forum_category['cat_title'])."</span><br />";
}
echo '<span class="forum_title">'.prepare4display($current_forum['forum_title']).'</span>';
if (!empty ($current_forum['forum_comment'])) {
echo '<br /><span class="forum_description">'.prepare4display($current_forum['forum_comment']).'</span>';
}
echo '</th></tr></thead>';
}
// The column headers (TODO: Make this sortable).
echo '<tr class="forum_threadheader">';
echo '<td></td>';
echo '<td>'.get_lang('Title').'</td>';
echo '<td>'.get_lang('Replies').'</td>';
echo '<td>'.get_lang('Views').'</td>';
echo '<td>'.get_lang('Author').'</td>';
echo '<td>'.get_lang('LastPost').'</td>';
echo '<td>'.get_lang('Actions').'</td>';
echo '</tr>';
// Getting al the threads
$threads = get_threads($my_forum); // Note: This has to be cleaned first.
$whatsnew_post_info = isset($_SESSION['whatsnew_post_info']) ? $_SESSION['whatsnew_post_info'] : null;
$counter = 0;
if (is_array($threads)) {
foreach ($threads as $row) {
// Thread who have no replies yet and the only post is invisible should not be displayed to students.
if (api_is_allowed_to_edit(false, true) OR !($row['thread_replies'] == '0' AND $row['visible'] == '0')) {
if ($counter % 2 == 0) {
$class = 'row_odd';
} else {
$class = 'row_even';
}
echo "<tr class=\"$class\">";
echo '<td>';
$my_whatsnew_post_info = isset($whatsnew_post_info[$my_forum][$row['thread_id']]) ? $whatsnew_post_info[$my_forum][$row['thread_id']] : null;
if (is_array($my_whatsnew_post_info) && !empty($my_whatsnew_post_info)) {
echo Display::return_icon('forumthread.gif');
} else {
echo Display::return_icon('forumthread.gif');
}
if ($row['thread_sticky'] == 1) {
echo Display::return_icon('exclamation.gif');
}
echo '</td>';
echo '<td>';
echo '<a href="viewthread.php?'.api_get_cidreq().'&amp;gidReq='.Security::remove_XSS($_GET['gidReq']).'&amp;gradebook='.Security::remove_XSS($_GET['gradebook']).'&amp;forum='.Security::remove_XSS($my_forum).'&amp;origin='.$origin.'&amp;thread='.$row['thread_id'].$origin_string.'&amp;search='.Security::remove_XSS(urlencode($my_search)).'" '.class_visible_invisible($row['visibility']).'>'.prepare4display($row['thread_title']).'</a></td>';
echo '<td>'.$row['thread_replies'].'</td>';
if ($row['user_id'] == '0') {
$name = prepare4display($row['thread_poster_name']);
} else {
$name = api_get_person_name($row['firstname'], $row['lastname']);
}
echo '<td>'.$row['thread_views'].'</td>';
if ($row['last_poster_user_id'] == '0') {
$name = $row['poster_name'];
} else {
$name = api_get_person_name($row['last_poster_firstname'], $row['last_poster_lastname']);
}
if ($origin != 'learnpath') {
echo '<td>'.display_user_link($row['user_id'], api_get_person_name($row['firstname'], $row['lastname'])).'</td>';
} else {
echo '<td>'.api_get_person_name($row['firstname'], $row['lastname']).'</td>';
}
// If the last post is invisible and it is not the teacher who is looking then we have to find the last visible post of the thread.
if (($row['visible'] == '1' OR api_is_allowed_to_edit(false, true)) && $origin != 'learnpath') {
$last_post = api_convert_and_format_date($row['thread_date'], null, date_default_timezone_get()).' '.get_lang('By').' '.display_user_link($row['last_poster_user_id'], $name);
} elseif ($origin != 'learnpath') {
$last_post_sql = "SELECT post.*, user.firstname, user.lastname FROM $table_posts post, $table_users user WHERE post.poster_id=user.user_id AND visible='1' AND thread_id='".$row['thread_id']."' ORDER BY post_id DESC";
$last_post_result = Database::query($last_post_sql);
$last_post_row = Database::fetch_array($last_post_result);
$name = api_get_person_name($last_post_row['firstname'], $last_post_row['lastname']);
$last_post = api_convert_and_format_date($last_post_row['post_date'], null, date_default_timezone_get()).' '.get_lang('By').' '.display_user_link($last_post_row['poster_id'], $name);
} else {
$last_post_sql = "SELECT post.*, user.firstname, user.lastname FROM $table_posts post, $table_users user WHERE post.poster_id=user.user_id AND visible='1' AND thread_id='".$row['thread_id']."' ORDER BY post_id DESC";
$last_post_result = Database::query($last_post_sql);
$last_post_row = Database::fetch_array($last_post_result);
$name = api_get_person_name($last_post_row['firstname'], $last_post_row['lastname']);
$last_post = api_convert_and_format_date($last_post_row['post_date'], null, date_default_timezone_get()).' '.get_lang('By').' '.$name;
}
echo '<td>'.$last_post.'</td>';
echo '<td>';
// Get attachment id.
$attachment_list = get_attachment($row['post_id']);
$id_attach = !empty($attachment_list) ? $attachment_list['id'] : '';
$sql_post_id = "SELECT post_id FROM $table_posts WHERE post_title='".Database::escape_string($row['thread_title'])."'";
$result_post_id = Database::query($sql_post_id);
$row_post_id = Database::fetch_array($result_post_id);
if ($origin != 'learnpath') {
if (api_is_allowed_to_edit(false, true) && !(api_is_course_coach() && $current_forum['session_id'] != $_SESSION['id_session'])) {
echo '<a href="editpost.php?'.api_get_cidreq().'&amp;forum='.Security::remove_XSS($my_forum).'&amp;thread='.Security::remove_XSS($row['thread_id']).'&amp;post='.$row_post_id['post_id'].'&amp;gidReq='.$_SESSION['toolgroup'].'&amp;origin='.$origin.'&amp;id_attach='.$id_attach.'">'.Display::return_icon('edit.png', get_lang('Edit'), array(), 22).'</a>';
echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;forum='.Security::remove_XSS($my_forum).'&amp;action=delete&amp;content=thread&amp;gidReq='.$_SESSION['toolgroup'].'&amp;id='.$row['thread_id'].$origin_string."\" onclick=\"javascript:if(!confirm('".addslashes(api_htmlentities(get_lang('DeleteCompleteThread'), ENT_QUOTES))."')) return false;\">".Display::return_icon('delete.png', get_lang('Delete'), array(), 22).'</a>';
display_visible_invisible_icon('thread', $row['thread_id'], $row['visibility'], array('forum' => $my_forum, 'origin' => $origin, 'gidReq' => $_SESSION['toolgroup']));
display_lock_unlock_icon('thread', $row['thread_id'], $row['locked'], array('forum' => $my_forum, 'origin' => $origin, 'gidReq' => $_SESSION['toolgroup']));
echo '<a href="viewforum.php?'.api_get_cidreq().'&amp;forum='.Security::remove_XSS($my_forum).'&amp;action=move&amp;gidReq='.$_SESSION['toolgroup'].'&amp;thread='.$row['thread_id'].$origin_string.'">'.Display::return_icon('move.png', get_lang('MoveThread'), array(), 22).'</a>';
}
}
$iconnotify = 'send_mail.gif';
if (is_array(isset($_SESSION['forum_notification']['thread']) ? $_SESSION['forum_notification']['thread'] : null)) {
if (in_array($row['thread_id'], $_SESSION['forum_notification']['thread'])) {
$iconnotify = 'send_mail_checked.gif';
}
}
$icon_liststd = 'user.png';
if (!api_is_anonymous() && api_is_allowed_to_session_edit(false, true)) {
echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;forum='.Security::remove_XSS($my_forum).'&amp;origin='.$origin.'&amp;action=notify&amp;content=thread&amp;gidReq='.$_SESSION['toolgroup'].'&amp;id='.$row['thread_id'].'">'.Display::return_icon($iconnotify, get_lang('NotifyMe')).'</a>';
}
if (api_is_allowed_to_edit(null,true) && $origin != 'learnpath') {
echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;forum='.Security::remove_XSS($my_forum).'&amp;origin='.$origin.'&amp;action=liststd&amp;content=thread&amp;gidReq='.$_SESSION['toolgroup'].'&amp;id='.$row['thread_id'].'">'.Display::return_icon($icon_liststd,get_lang('StudentList'), array(), 22).'</a>';
}
echo '</td></tr>';
}
$counter++;
}
}
echo '</table>';
echo isset($table_list) ? $table_list : '';
/* FOOTER */
if ($origin != 'learnpath') {
Display :: display_footer();
}