<?php // $Id: link.php 20716 2009-05-16 07:28:22Z ivantcholakov $
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2004-2008 Dokeos SPRL
	Copyright (c) 2003 Ghent University (UGent)

	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: Dokeos, rue Notre Dame, 152, B-1140 Evere, Belgium, info@dokeos.com
==============================================================================
*/

/**
==============================================================================
* Main script for the links tool.
*
* Features:
* - Organize links into categories;
* - favorites/bookmarks-like interface;
* - move links up/down within a category;
* - move categories up/down;
* - expand/collapse all categories (except the main "non"-category);
* - add link to 'root' category => category-less link is always visible.
*
* @author Patrick Cool, main author, completely rewritten
* @author Rene Haentjens, added CSV file import (October 2004)
* @package dokeos.link
* @todo improve organisation, tables should come from database library
==============================================================================
*/

/*
==============================================================================
		INIT SECTION
==============================================================================
*/
// name of the language file that needs to be included
$language_file = "link";

// including libraries
include("../inc/global.inc.php");
include(api_get_path(LIBRARY_PATH).'events.lib.inc.php');
include("linkfunctions.php");


$this_section=SECTION_COURSES;

api_protect_course_script();

// @todo change the $_REQUEST into $_POST or $_GET
// @todo remove this code
$link_submitted = (isset($_POST['submitLink'])?true:false);
$category_submitted = (isset($_POST['submitCategory'])?true:false);
$urlview = (!empty($_GET['urlview'])?$_GET['urlview']:'');
$submitImport = (!empty($_POST['submitImport'])?$_POST['submitImport']:'');
$down = (!empty($_GET['down'])?$_GET['down']:'');
$up = (!empty($_GET['up'])?$_GET['up']:'');
$catmove = (!empty($_GET['catmove'])?$_GET['catmove']:'');
$editlink = (!empty($_REQUEST['editlink'])?$_REQUEST['editlink']:'');
$id = (!empty($_REQUEST['id'])?$_REQUEST['id']:'');
$urllink = (!empty($_REQUEST['urllink'])?$_REQUEST['urllink']:'');
$title = (!empty($_REQUEST['title'])?$_REQUEST['title']:'');
$description = (!empty($_REQUEST['description'])?$_REQUEST['description']:'');
$selectcategory = (!empty($_REQUEST['selectcategory'])?$_REQUEST['selectcategory']:'');
$submitLink = (isset($_REQUEST['submitLink'])?true : false);
$action = (!empty($_REQUEST['action'])?$_REQUEST['action']:'');
$category_title = (!empty($_REQUEST['category_title'])?$_REQUEST['category_title']:'');
$submitCategory = isset($_POST['submitCategory'])?true:false;
$nameTools = get_lang('Links');

if (isset($_GET['action']) && $_GET['action']=='addlink') {
	$nameTools = '';
	$interbreadcrumb[] = array ('url' => 'link.php', 'name' => get_lang('Links'));
	$interbreadcrumb[] = array ('url' => 'link.php?action=addlink', 'name' => get_lang('AddLink'));
}	

if (isset($_GET['action']) && $_GET['action']=='addcategory') {
	$nameTools = '';
	$interbreadcrumb[] = array ('url' => 'link.php', 'name' => get_lang('Links'));
	$interbreadcrumb[] = array ('url' => 'link.php?action=addcategory', 'name' => get_lang('AddCategory'));
}

if (isset($_GET['action']) && $_GET['action']=='editlink') {
	$nameTools = '';
	$interbreadcrumb[] = array ('url' => 'link.php', 'name' => get_lang('Links'));
	$interbreadcrumb[] = array ('url' => '#', 'name' => get_lang('EditLink'));
}	 	
	
				
// Database Table definitions
$tbl_link = Database::get_course_table(TABLE_LINK);
$tbl_categories = Database::get_course_table(TABLE_LINK_CATEGORY);

//statistics
event_access_tool(TOOL_LINK);

Display::display_header($nameTools, 'Links');
?>
<script type="text/javascript">
/* <![CDATA[ */
function MM_popupMsg(msg) { //v1.0
  confirm(msg);
}
/* ]]> */
</script>

<?php



/*
-----------------------------------------------------------
	Action Handling
-----------------------------------------------------------
*/
$nameTools = get_lang("Links");

if(isset($_GET['action'])) {
	switch($_GET['action']) {
		case "addlink":		
			if($link_submitted)
			{
				if(!addlinkcategory("link"))	// here we add a link
				{
					unset($submitLink);
				}
			}
			break;
		case "addcategory":		
			if($category_submitted)
			{
				if(!addlinkcategory("category"))	// here we add a category
				{
					unset($submitCategory);
				}
			}
			break;		
		case "importcsv":
			if($_POST["submitImport"])
			{
				import_csvfile();
			}
			break;
		case "deletelink":
			deletelinkcategory("link"); // here we delete a link
			break;
			
		case "deletecategory":
			deletelinkcategory("category"); // here we delete a category
			break;
		case "editlink":
			editlinkcategory("link"); // here we edit a link
			break;
		case "editcategory":
			editlinkcategory("category"); // here we edit a category
			break;
		case "visible":
			change_visibility($_GET['id'],$_GET['scope']); // here we edit a category
			break;
		case "invisible":
			change_visibility($_GET['id'],$_GET['scope']); // here we edit a category
			break;
	}
}

/*
-----------------------------------------------------------
	Introduction section
-----------------------------------------------------------
*/
$fck_attribute['Width'] = '100%';
$fck_attribute['Height'] = '300';
$fck_attribute['ToolbarSet'] = 'Introduction';
Display::display_introduction_section(TOOL_LINK,'left');
$fck_attribute = null; // Clearing this global variable immediatelly after it has been used.


if (is_allowed_to_edit() and isset($_GET['action'])) {	
	echo '<div class="actions">';
	echo '<a href="link.php?cidReq='.Security::remove_XSS($_GET['cidReq']).'&amp;urlview='.Security::remove_XSS($_GET['urlview']).'">'.Display::return_icon('back.png',get_lang('BackToLinksOverview')).get_lang('BackToLinksOverview').'</a>';
	echo '</div>';
	
	// Displaying the correct title and the form for adding a category or link. This is only shown when nothing
	// has been submitted yet, hence !isset($submitLink)
	if (($_GET['action']=="addlink" or $_GET['action']=="editlink") and empty($_POST['submitLink'])) {
		echo '<div class="row">';
		if ($_GET['action']=="addlink")
			{echo '<div class="form_header">'.get_lang("LinkAdd").'</div>';}
		else
			{echo '<div class="form_header">'.get_lang("LinkMod").'</div>';}
		echo '</div>';
		if ($category=="") {
			$category=0;
		}
		echo "<form method=\"post\" action=\"".api_get_self()."?action=".Security::remove_XSS($_GET['action'])."&amp;urlview=".Security::remove_XSS($urlview)."\">";
		if ($_GET['action']=="editlink")
		{
			echo "<input type=\"hidden\" name=\"id\" value=\"".Security::remove_XSS($_GET['id'])."\" />";
		}

		echo '	<div class="row">
					<div class="label">
						<span class="form_required">*</span> '.get_lang('Url').'
					</div>
					<div class="formw">
						<input type="text" name="urllink" size="50" value="' . (empty($urllink)?'http://':api_htmlentities($urllink, ENT_COMPAT, $charset)) . '" />
					</div>
				</div>';
		
		echo '	<div class="row">
					<div class="label">
						'.get_lang('LinkName').'
					</div>
					<div class="formw">
						<input type="text" name="title" size="50" value="' . api_htmlentities($title,ENT_QUOTES,$charset) . '" />
					</div>
				</div>';

		echo '	<div class="row">
					<div class="label">
						'.get_lang('Description').'
					</div>
					<div class="formw">
						<textarea rows="3" cols="50" name="description">' .	api_htmlentities($description,ENT_QUOTES,$charset) . '</textarea>
					</div>
				</div>';


		$sqlcategories="SELECT * FROM ".$tbl_categories." ORDER BY display_order DESC";
		$resultcategories = api_sql_query($sqlcategories,__FILE__,__LINE__);

		if (Database::num_rows($resultcategories)) {
			echo '	<div class="row">
						<div class="label">
							'.get_lang('Category').'
						</div>
						<div class="formw">';
			echo '			<select name="selectcategory">';
			echo '			<option value="0">--</option>';
			while ($myrow = Database::fetch_array($resultcategories)) 
			{
				echo "		<option value=\"".$myrow["id"]."\"";
				if ($myrow["id"]==$category)
					{echo " selected";}
				echo ">".$myrow["category_title"]."</option>";
			}
			echo '			</select>';
			echo '		</div>
					</div>';			
			



		}

		echo '	<div class="row">
					<div class="label">
						'.get_lang('OnHomepage').'?
					</div>
					<div class="formw">
						<input class="checkbox" type="checkbox" name="onhomepage" id="onhomepage" value="1"'.$onhomepage.'><label for="onhomepage"> '.get_lang('Yes').'</label>
					</div>
				</div>';		

		if(api_get_setting('search_enabled')=='true')
		{
			require_once(api_get_path(LIBRARY_PATH) . 'specific_fields_manager.lib.php');
			$specific_fields = get_specific_field_list();

			echo '	<div class="row">
						<div class="label">
							'.get_lang('SearchFeatureDoIndexLink').'?
						</div>
						<div class="formw">
							<input class="checkbox" type="checkbox" name="index_document" id="index_document" checked="checked"><label for="index_document"> '.get_lang('Yes').'</label>
						</div>';			
			
			foreach ($specific_fields as $specific_field) {
				//Author : <input name="A" type="text" />

				$default_values = '';
                if ($_GET['action']=="editlink")
				{
					$filter = array('course_code'=> "'". api_get_course_id() ."'", 'field_id' => $specific_field['id'], 'ref_id' => Security::remove_XSS($_GET['id']), 'tool_id' => '\''. TOOL_LINK .'\'');
					$values = get_specific_field_values_list($filter, array('value'));
					if ( !empty($values) ) {
						$arr_str_values = array();
						foreach ($values as $value) {
							$arr_str_values[] = $value['value'];
						}
						$default_values = implode(', ', $arr_str_values);
					}
				}

				$sf_textbox = '	
						<div class="row">
							<div class="label">%s</div>
							<div class="formw">
								<input name="%s" type="text" value="%s"/>
							</div>
						</div>';				
				
				echo sprintf($sf_textbox, $specific_field['name'], $specific_field['code'], $default_values);
			}
		}	
		
		echo '	<div class="row">
					<div class="label">
					</div>
					<div class="formw">
						<button class="save" type="Submit" name="submitLink" value="OK">'.get_lang('SaveLink').'</button>
					</div>
				</div>';	
	
		echo '</form>';
	} elseif(($_GET['action']=="addcategory" or $_GET['action']=="editcategory") and !$submitCategory) {
		echo '<div class="row">';
		if ($_GET['action']=="addcategory")
			{echo '<div class="form_header">'.get_lang('CategoryAdd').'</div>';}
		else
			{echo '<div class="form_header">'.get_lang('CategoryMod').'</div>';}
		echo "</div>\n\n";
		echo "<form method=\"post\" action=\"".api_get_self()."?action=".Security::remove_XSS($_GET['action'])."&amp;urlview=".Security::remove_XSS($urlview)."\">";
		if ($_GET['action']=="editcategory")
		{
			echo "<input type=\"hidden\" name=\"id\" value=\"".$id."\" />";
		}
		
		echo '	<div class="row">
					<div class="label">
						<span class="form_required">*</span> '.get_lang('CategoryName').'
					</div>
					<div class="formw">
						<input type="text" name="category_title" size="50" value="'.api_htmlentities($category_title,ENT_QUOTES,$charset).'" />
					</div>
				</div>';
		
		echo '	<div class="row">
					<div class="label">
						'.get_lang('Description').'
					</div>
					<div class="formw">
						<textarea rows="3" cols="50" name="description">'.api_htmlentities($description,ENT_QUOTES,$charset).'</textarea>
					</div>
				</div>';
		
		echo '	<div class="row">
					<div class="label">
					</div>
					<div class="formw">
						<button class="save" type="submit" name="submitCategory">'.get_lang('CreateCategory').' </button>
					</div>
				</div>';		
		
		echo "</form>";
	}
	/*elseif(($_GET['action']=="importcsv") and !$submitImport)  // RH start
	{
		echo "<h4>", get_lang('CsvImport'), "</h4>\n\n",
		     "<form method=\"post\" action=\"".api_get_self()."?action=".$_GET['action']."&amp;urlview=".$urlview."\" enctype=\"multipart/form-data\">",
                // uncomment if you want to set a limit: '<input type="hidden" name="MAX_FILE_SIZE" value="32768">', "\n",
                '<input type="file" name="import_file" size="30">', "\n",
		     	"<input type=\"Submit\" name=\"submitImport\" value=\"".get_lang('Ok')."\">",
		     "</form>";
		echo get_lang('CsvExplain');
	}*/
}


if (!empty($down)) {
	movecatlink($down);
}
if (!empty($up)) {
	movecatlink($up);
}

if (empty($_GET['action']) || ($_GET['action']!='editlink' && $_GET['action']!='addcategory' && $_GET['action']!='addlink') || $link_submitted || $category_submitted) {	
	/*
	-----------------------------------------------------------
		Action Links
	-----------------------------------------------------------
	*/
	echo '<div class="actions">';
	if(is_allowed_to_edit()) {
		$urlview = Security::remove_XSS($urlview);
		echo Display::return_icon('linksnew.gif',get_lang('LinkAdd'))." <a href=\"".api_get_self()."?".api_get_cidreq()."&action=addlink&amp;category=".(!empty($category)?$category:'')."&amp;urlview=$urlview\">".get_lang("LinkAdd")."</a>\n";
		echo Display::return_icon('folder_new.gif', get_lang("CategoryAdd"))." <a href=\"".api_get_self()."?".api_get_cidreq()."&action=addcategory&amp;urlview=".$urlview."\">".get_lang("CategoryAdd")."</a>\n";
		   /* "<a href=\"".api_get_self()."?".api_get_cidreq()."&action=importcsv&amp;urlview=".$urlview."\">".get_lang('CsvImport')."</a>\n", // RH*/
	}
	//making the show none / show all links. Show none means urlview=0000 (number of zeros depending on the
	//number of categories). Show all means urlview=1111 (number of 1 depending on teh number of categories).
	$sqlcategories="SELECT * FROM ".$tbl_categories." ORDER BY display_order DESC";
	$resultcategories=api_sql_query($sqlcategories);
	$aantalcategories = Database::num_rows($resultcategories);
	if ($aantalcategories > 0) {
		echo Display::return_icon('remove.gif', $shownone)." <a href=\"".api_get_self()."?".api_get_cidreq()."&urlview=";
		for($j = 1; $j <= $aantalcategories; $j++) {
			echo "0";
		}
		echo "\">".get_lang('shownone')."</a>";
		echo Display::return_icon('add.gif', $showall)." <a href=\"".api_get_self()."?".api_get_cidreq()."&urlview=";
		for($j = 1; $j <= $aantalcategories; $j++)
		{
		echo "1";
		}
		echo "\">".get_lang('showall')."</a>";
	}
	echo '</div>';

	//Starting the table which contains the categories
	$sqlcategories="SELECT * FROM ".$tbl_categories." ORDER BY display_order DESC";
	$resultcategories=api_sql_query($sqlcategories);
		
	echo '<table class="data_table">';
	// displaying the links which have no category (thus category = 0 or NULL), if none present this will not be displayed
	$sqlLinks = "SELECT * FROM ".$tbl_link." WHERE category_id=0 or category_id IS NULL";
	$result = api_sql_query($sqlLinks);
	$numberofzerocategory=Database::num_rows($result);		
	if ($numberofzerocategory!==0) {
		echo "<tr><th style=\"font-weight: bold; text-align:left;padding-left: 10px;\"><i>".get_lang('General')."</i></th></tr>";
		echo '</table>';	
		showlinksofcategory(0);		
	}
		
	$i=0;
	$catcounter=1;
	$view="0";

	while ($myrow=Database::fetch_array($resultcategories))
	{
		//if (!isset($urlview))
		if ($urlview == '')
		{
			// No $view set in the url, thus for each category link it should be all zeros except it's own
			makedefaultviewcode($i);
		}
		else
		{
			$view=$urlview;
			$view[$i]="1";
		}
		// if the $urlview has a 1 for this categorie, this means it is expanded and should be desplayed as a
		// - instead of a +, the category is no longer clickable and all the links of this category are displayed
		$myrow["description"]=text_filter($myrow["description"]);
		
		if ($urlview[$i]=="1")
		{
			$newurlview=$urlview;
			$newurlview[$i]="0";
			
			echo '<tr>';
				echo '<table class="data_table">';
				echo '<tr>';			
					echo '<th width="81%"  style="font-weight: bold; text-align:left;padding-left: 5px;">';
					echo '<a href="'.api_get_self()."?".api_get_cidreq()."&urlview=".Security::remove_XSS($newurlview)."\">";
					echo "<img src=../img/remove.gif>&nbsp;&nbsp;".api_htmlentities($myrow["category_title"],ENT_QUOTES,$charset)."</a><br/>&nbsp;&nbsp;&nbsp;".$myrow["description"];
					
					if (is_allowed_to_edit())
						{	
							echo '<th>';	
							showcategoryadmintools($myrow["id"]);
							echo '</th>';			
						}
					echo '</th>';						
				echo '</tr>';
				echo '</table>';		
				echo showlinksofcategory($myrow["id"]);						
			echo '</tr>';			
		}
		else
		{		
			echo '<tr>';
				echo '<table class="data_table">';
				echo '<tr>';			
					echo '<th width="81%" style="font-weight: bold; text-align:left;padding-left: 5px;"><a href="'.api_get_self()."?".api_get_cidreq()."&urlview=";
					echo is_array($view)?implode('',$view):$view;
					echo "\"><img src=../img/add.gif>&nbsp;&nbsp;".  api_htmlentities($myrow["category_title"],ENT_QUOTES,$charset);
					echo'</a><br />&nbsp;&nbsp;&nbsp;';
					echo $myrow["description"];						
						if (is_allowed_to_edit())
						{		
							echo '<th style="text-align:center;">';	
							showcategoryadmintools($myrow["id"]);			
							echo '</th>';
						}
					echo '</th>';			
				echo '</tr>';
				
				
				echo '</table>';						
			echo '</tr>';				
		}
		// displaying the link of the category
		$i++;
	}
	echo '</table>';
	////////////////////////////////////////////////////////////////////////////
}		
		


Display::display_footer();
?>
