<?php
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2008 Dokeos Latinoamerica SAC
	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	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.

	See the GNU General Public License for more details.

	Contact address: Dokeos, 108 rue du Corbeau, B-1030 Brussels, Belgium
	Mail: info@dokeos.com
==============================================================================
*/
/**
* 	@package dokeos.forum
*/
// name of the language file that needs to be included
$language_file = 'forum';
// including the global dokeos file
require '../inc/global.inc.php';
// the section (tabs)
$this_section=SECTION_COURSES;

// notice for unauthorized people.
api_protect_course_script(true);

// including additional library scripts
require_once (api_get_path(LIBRARY_PATH).'formvalidator/FormValidator.class.php');
include_once (api_get_path(LIBRARY_PATH).'groupmanager.lib.php');
//require_once (api_get_path(LIBRARY_PATH).'resourcelinker.lib.php');
$nameTools=get_lang('Forum');

/*
-----------------------------------------------------------
	Including necessary files
-----------------------------------------------------------
*/
require 'forumconfig.inc.php';
require_once 'forumfunction.inc.php';
$htmlHeadXtra[] = '<script type="text/javascript" src="'.api_get_path(WEB_CODE_PATH).'inc/lib/javascript/jquery.js" ></script>';
$htmlHeadXtra[] = '<script language="javascript">
										$(document).ready(function(){ $(\'.hide-me\').slideUp() });
									function hidecontent(content){ $(content).slideToggle(\'normal\'); } 
									</script>';

//are we in a lp ?
$origin = '';
if (isset($_GET['origin'])) {
	$origin =  Security::remove_XSS($_GET['origin']);
}
/*
==============================================================================
		MAIN DISPLAY SECTION
==============================================================================
*/
/*
-----------------------------------------------------------
	Retrieving forum and forum categorie 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
$current_thread=get_thread_information($_GET['thread']); // note: this has to be validated that it is an existing thread
$current_forum=get_forum_information($current_thread['forum_id']); // note: this has to be validated that it is an existing forum.
$current_forum_category=get_forumcategory_information($current_forum['forum_category']);
$whatsnew_post_info=$_SESSION['whatsnew_post_info'];
/*
-----------------------------------------------------------
	Header and Breadcrumbs
-----------------------------------------------------------
*/

if (isset($_SESSION['gradebook'])){
	$gradebook=	$_SESSION['gradebook'];
}

if (!empty($gradebook) && $gradebook=='view') {	
	$interbreadcrumb[]= array (
			'url' => '../gradebook/'.$_SESSION['gradebook_dest'],
			'name' => get_lang('Gradebook')
		);
}

if ($origin=='learnpath') {
	include(api_get_path(INCLUDE_PATH).'reduced_header.inc.php');
} else {
	$interbreadcrumb[]=array("url" => "index.php?gradebook=$gradebook&search=".Security::remove_XSS(urlencode($_GET['search'])),"name" => $nameTools);
	$interbreadcrumb[]=array("url" => "viewforumcategory.php?forumcategory=".$current_forum_category['cat_id']."&amp;search=".Security::remove_XSS(urlencode($_GET['search'])),"name" => prepare4display($current_forum_category['cat_title']));
	$interbreadcrumb[]=array("url" => "viewforum.php?forum=".Security::remove_XSS($_GET['forum'])."&amp;origin=".$origin."&amp;search=".Security::remove_XSS(urlencode($_GET['search'])),"name" => prepare4display($current_forum['forum_title']));

	// the last element of the breadcrumb navigation is already set in interbreadcrumb, so give empty string
	Display :: display_header('');
	api_display_tool_title($nameTools);
}

/*
-----------------------------------------------------------
	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['visibility']==0 OR $current_thread['visibility']==0)) {
	forum_not_allowed_here();
}

/*
-----------------------------------------------------------
	Actions
-----------------------------------------------------------
*/
if ($_GET['action']=='delete' && isset($_GET['content']) && isset($_GET['id']) && api_is_allowed_to_edit(false,true)) {
	$message=delete_post($_GET['id']); // note: this has to be cleaned first
}
if (($_GET['action']=='invisible' || $_GET['action']=='visible') && isset($_GET['id']) && api_is_allowed_to_edit(false,true)) {
	$message=approve_post($_GET['id'],$_GET['action']); // note: this has to be cleaned first
}
if ($_GET['action']=='move' and isset($_GET['post'])) {
	$message=move_post_form();
}

/*
-----------------------------------------------------------
	Display the action messages
-----------------------------------------------------------
*/
if (!empty($message)) {
	Display :: display_confirmation_message(get_lang($message));
}

if ($message<>'PostDeletedSpecial') {// in this case the first and only post of the thread is removed
	// this increases the number of times the thread has been viewed
	increase_thread_view($_GET['thread']);

	/*
	-----------------------------------------------------------
		Action Links
	-----------------------------------------------------------
	*/
	echo '<div style="float:right;">';
	$my_url = '<a href="viewthread.php?'.api_get_cidreq().'&amp;forum='.Security::remove_XSS($_GET['forum']).'&amp;thread='.Security::remove_XSS($_GET['thread']).'&amp;origin='.$origin.'&gradebook='.$gradebook.'&amp;search='.Security::remove_XSS(urlencode($_GET['search']));
	echo $my_url.'&amp;view=flat&origin='.$origin.'">'.get_lang('FlatView').'</a> | ';
	echo $my_url.'&amp;view=threaded&origin='.$origin.'">'.get_lang('ThreadedView').'</a> | ';
	echo $my_url.'&amp;view=nested&origin='.$origin.'">'.get_lang('NestedView').'</a>';
	$my_url = null;
	echo '</div>';
	// the reply to thread link should only appear when the forum_category is not locked AND the forum is not locked AND the thread is not locked.
	// if one of the three levels is locked then the link should not be displayed
	if ($current_forum_category['locked']==0 AND $current_forum['locked']==0 AND $current_thread['locked']==0 OR api_is_allowed_to_edit(false,true)) {
		// The link should only appear when the user is logged in or when anonymous posts are allowed.
		if ($_user['user_id'] OR ($current_forum['allow_anonymous']==1 AND !$_user['user_id'])) {
			//reply link
			echo '<a href="reply.php?'.api_get_cidreq().'&forum='.Security::remove_XSS($_GET['forum']).'&amp;thread='.Security::remove_XSS($_GET['thread']).'&amp;action=replythread&origin='.$origin.'">'.get_lang('ReplyToThread').'</a>';
			
			//new thread link
			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 $current_forum['locked'] <> 1) {
					echo '&nbsp;&nbsp;'; 
					/*echo '<a href="newthread.php?'.api_get_cidreq().'&forum='.Security::remove_XSS($_GET['forum']).$origin_string.'">'.Display::return_icon('forumthread_new.gif').' '.get_lang('NewTopic').'</a>';*/
				} else {
					echo get_lang('ForumLocked');
				}
			}
		}
	}
	// note: this is to prevent that some browsers display the links over the table (FF does it but Opera doesn't)
	echo '&nbsp;';
	
	/*
	-----------------------------------------------------------
		Display Forum Category and the Forum information
	-----------------------------------------------------------
	*/
	if (!$_SESSION['view']) {
		$viewmode=$current_forum['default_view'];
	} else {
		$viewmode=$_SESSION['view'];
	}

	$viewmode_whitelist=array('flat', 'threaded', 'nested');
	if (isset($_GET['view']) and in_array($_GET['view'],$viewmode_whitelist)) {
		$viewmode=Database::escape_string($_GET['view']);
		$_SESSION['view']=$viewmode;
	} 
	if (empty($viewmode)) {
		$viewmode = 'flat';
	}

	/*
	-----------------------------------------------------------
		Display Forum Category and the Forum 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
	echo "<table class=\"data_table\" width=\"100%\">\n";

	// the thread	
	echo "\t<tr>\n\t\t<th style=\"padding-left:5px;\" align=\"left\" colspan=\"6\">";		
	echo '<span class="forum_title">'.prepare4display($current_thread['thread_title']).'</span><br />';
	
	if ($origin!='learnpath') {		
		echo '<span class="forum_low_description">'.prepare4display($current_forum_category['cat_title']).' - ';				
	}
		
	echo prepare4display($current_forum['forum_title']).'<br />';						
	echo "</th>\n";
	echo "\t</tr>\n";		
	echo '<span>'.prepare4display($current_thread['thread_comment']).'</span>';	
	echo "</table>";
		
	include_once('viewpost.inc.php');
} // if ($message<>'PostDeletedSpecial') // in this case the first and only post of the thread is removed

/*
==============================================================================
		FOOTER
==============================================================================
*/
if ($origin!='learnpath') {
	Display :: display_footer();
}