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

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<?php
/*
==============================================================================
Dokeos - elearning and course management software
Copyright (c) 2004-2008 Dokeos S.A.
Copyright (c) 2003 Ghent University (UGent)
Copyright (c) 2001 Universite catholique de Louvain (UCL)
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, rue du Corbeau, 108, B-1030 Brussels, Belgium
Mail: info@dokeos.com
==============================================================================
*/
/**
==============================================================================
* Function library for the links tool.
*
* This is a complete remake of the original link tool.
* New features:
* - Organize links into categories;
* - favorites/bookmarks interface;
* - move links up/down within a category;
* - move categories up/down;
* - expand/collapse all categories;
* - add link to 'root' category => category-less link is always visible.
*
* @author Patrick Cool, complete remake (December 2003 - January 2004)
* @author René Haentjens, CSV file import (October 2004)
* @package dokeos.link
==============================================================================
*/
/*
==============================================================================
FUNCTIONS
==============================================================================
*/
/**
* Used to add a link or a category
* @param string $type, "link" or "category"
* @todo replace strings by constants
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function addlinkcategory($type)
{
global $catlinkstatus;
global $msgErr;
$ok = true;
if ($type == "link")
{
$tbl_link = Database :: get_course_table(TABLE_LINK);
$title = Security::remove_XSS($_POST['title']);
$urllink = Security::remove_XSS($_POST['urllink']);
$description = Security::remove_XSS($_POST['description']);
$selectcategory = Security::remove_XSS($_POST['selectcategory']);
if ($_POST['onhomepage'] == '') {
$onhomepage = 0;
$target='_self';//default target
} else {
$onhomepage = Security::remove_XSS($_POST['onhomepage']);
$target = Security::remove_XSS($_POST['target_link']);
}
$urllink = trim($urllink);
$title = trim($title);
$description = trim($description);
// if title is empty, an error occurs
if (empty ($urllink) OR $urllink == 'http://')
{
$msgErr = get_lang('GiveURL');
Display::display_error_message(get_lang('GiveURL'));
$ok = false;
}
// if the title is empty, we use the url as the title
else
{
if (empty ($title))
{
$title = $urllink;
}
// we check weither the $url starts with http://, if not we add this
if (!strstr($urllink, '://'))
{
$urllink = "http://".$urllink;
}
// looking for the largest order number for this category
$result = Database::query("SELECT MAX(display_order) FROM ".$tbl_link." WHERE category_id='".Database::escape_string($_POST['selectcategory'])."'");
list ($orderMax) = Database::fetch_row($result);
$order = $orderMax +1;
$session_id = api_get_session_id();
$sql = "INSERT INTO ".$tbl_link." (url, title, description, category_id, display_order, on_homepage, target, session_id) VALUES ('$urllink','$title','$description','$selectcategory','$order', '$onhomepage','$target','$session_id')";
$catlinkstatus = get_lang('LinkAdded');
Database::query($sql, __FILE__, __LINE__);
$link_id = Database::insert_id();
if ( (api_get_setting('search_enabled')=='true') && $link_id && extension_loaded('xapian')) {
require_once(api_get_path(LIBRARY_PATH) .'search/DokeosIndexer.class.php');
require_once(api_get_path(LIBRARY_PATH) .'search/IndexableChunk.class.php');
require_once(api_get_path(LIBRARY_PATH) .'specific_fields_manager.lib.php');
$courseid = api_get_course_id();
$specific_fields = get_specific_field_list();
$ic_slide = new IndexableChunk();
// add all terms to db
$all_specific_terms = '';
foreach ($specific_fields as $specific_field) {
if (isset($_REQUEST[$specific_field['code']])) {
$sterms = trim($_REQUEST[$specific_field['code']]);
if (!empty($sterms)) {
$all_specific_terms .= ' '. $sterms;
$sterms = explode(',', $sterms);
foreach ($sterms as $sterm) {
$ic_slide->addTerm(trim($sterm), $specific_field['code']);
add_specific_field_value($specific_field['id'], $courseid, TOOL_LINK, $link_id, $sterm);
}
}
}
}
// build the chunk to index
$ic_slide->addValue("title", $title);
$ic_slide->addCourseId($courseid);
$ic_slide->addToolId(TOOL_LINK);
$xapian_data = array(
SE_COURSE_ID => $courseid,
SE_TOOL_ID => TOOL_LINK,
SE_DATA => array('link_id' => (int)$link_id),
SE_USER => (int)api_get_user_id(),
);
$ic_slide->xapian_data = serialize($xapian_data);
$description = $all_specific_terms .' '. $description;
$ic_slide->addValue("content", $description);
// add category name if set
if (isset($_POST['selectcategory']) && $selectcategory>0) {
$table_link_category = Database::get_course_table(TABLE_LINK_CATEGORY);
$sql_cat = 'SELECT * FROM %s WHERE id=%d LIMIT 1';
$sql_cat = sprintf($sql_cat, $table_link_category, (int)$selectcategory);
$result = Database::query($sql_cat, __FILE__, __LINE__);
if (Database::num_rows($result) == 1) {
$row = Database::fetch_array($result);
$ic_slide->addValue("category", $row['category_title']);
}
}
$di = new DokeosIndexer();
isset($_POST['language'])? $lang=Database::escape_string($_POST['language']): $lang = 'english';
$di->connectDb(NULL, NULL, $lang);
$di->addChunk($ic_slide);
//index and return search engine document id
$did = $di->index();
if ($did) {
// save it to db
$tbl_se_ref = Database::get_main_table(TABLE_MAIN_SEARCH_ENGINE_REF);
$sql = 'INSERT INTO %s (id, course_code, tool_id, ref_id_high_level, search_did)
VALUES (NULL , \'%s\', \'%s\', %s, %s)';
$sql = sprintf($sql, $tbl_se_ref, $courseid, TOOL_LINK, $link_id, $did);
Database::query($sql,__FILE__,__LINE__);
}
}
unset ($urllink, $title, $description, $selectcategory);
Display::display_confirmation_message(get_lang('LinkAdded'));
}
} elseif ($type == "category") {
$tbl_categories = Database :: get_course_table(TABLE_LINK_CATEGORY);
$category_title = trim($_POST['category_title']);
$description = trim($_POST['description']);
if (empty ($category_title)) {
$msgErr = get_lang('GiveCategoryName');
Display::display_error_message(get_lang('GiveCategoryName'));
$ok = false;
} else {
// looking for the largest order number for this category
$result = Database::query("SELECT MAX(display_order) FROM ".$tbl_categories."");
list ($orderMax) = Database::fetch_row($result);
$order = $orderMax +1;
$session_id = api_get_session_id();
$sql = "INSERT INTO ".$tbl_categories." (category_title, description, display_order, session_id) VALUES ('".Security::remove_XSS($category_title)."','".Security::remove_XSS($description)."', '$order', '$session_id')";
Database::query($sql, __FILE__, __LINE__);
$catlinkstatus = get_lang('CategoryAdded');
unset ($category_title, $description);
Display::display_confirmation_message(get_lang('CategoryAdded'));
}
}
// "WHAT'S NEW" notification : update last tool Edit
if ($type == "link")
{
global $_user;
global $_course;
global $nameTools;
api_item_property_update($_course, TOOL_LINK, $link_id, "LinkAdded", $_user['user_id']);
}
return $ok;
}
// End of the function addlinkcategory
/**
* Used to delete a link or a category
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function deletelinkcategory($type)
{
global $catlinkstatus;
global $_course;
global $_user;
$tbl_link = Database :: get_course_table(TABLE_LINK);
$tbl_categories = Database :: get_course_table(TABLE_LINK_CATEGORY);
$TABLE_ITEM_PROPERTY = Database :: get_course_table(TABLE_ITEM_PROPERTY);
if ($type == "link")
{
global $id;
// -> items are no longer fysically deleted, but the visibility is set to 2 (in item_property). This will
// make a restore function possible for the platform administrator
if (isset($_GET['id']) && $_GET['id']==strval(intval($_GET['id']))) {
$sql="UPDATE $tbl_link SET on_homepage='0' WHERE id='".Database::escape_string($_GET['id'])."'";
Database::query($sql,__FILE__,__LINE__);
}
api_item_property_update($_course, TOOL_LINK, $id, "delete", $_user['user_id']);
delete_link_from_search_engine(api_get_course_id(), $id);
$catlinkstatus = get_lang("LinkDeleted");
unset ($id);
Display::display_confirmation_message(get_lang('LinkDeleted'));
}
if ($type == "category")
{
global $id;
// first we delete the category itself and afterwards all the links of this category.
$sql = "DELETE FROM ".$tbl_categories." WHERE id='".Database::escape_string(Security::remove_XSS($_GET['id']))."'";
Database::query($sql, __FILE__, __LINE__);
$sql = "DELETE FROM ".$tbl_link." WHERE category_id='".Database::escape_string(Security::remove_XSS($_GET['id']))."'";
$catlinkstatus = get_lang('CategoryDeleted');
unset ($id);
Database::query($sql, __FILE__, __LINE__);
Display::display_confirmation_message(get_lang('CategoryDeleted'));
}
}
/**
* Removes a link from search engine database
*
* @param string $course_id Course code
* @param int $document_id Document id to delete
*/
function delete_link_from_search_engine($course_id, $link_id) {
// remove from search engine if enabled
if (api_get_setting('search_enabled') == 'true') {
$tbl_se_ref = Database::get_main_table(TABLE_MAIN_SEARCH_ENGINE_REF);
$sql = 'SELECT * FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_high_level=%s LIMIT 1';
$sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_LINK, $link_id);
$res = Database::query($sql, __FILE__, __LINE__);
if (Database::num_rows($res) > 0) {
$row = Database::fetch_array($res);
require_once(api_get_path(LIBRARY_PATH) .'search/DokeosIndexer.class.php');
$di = new DokeosIndexer();
$di->remove_document((int)$row['search_did']);
}
$sql = 'DELETE FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_high_level=%s LIMIT 1';
$sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_LINK, $link_id);
Database::query($sql, __FILE__, __LINE__);
// remove terms from db
require_once(api_get_path(LIBRARY_PATH) .'specific_fields_manager.lib.php');
delete_all_values_for_item($course_id, TOOL_DOCUMENT, $link_id);
}
}
/**
* Used to edit a link or a category
* @todo rewrite the whole links tool because it is becoming completely cluttered,
* code does not follow the coding conventions, does not use html_quickform, ...
* some features were patched in
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
* @todo replace the globals with the appropriate $_POST or $_GET values
*/
function editlinkcategory($type)
{
global $catlinkstatus;
global $id;
global $submitLink;
global $submitCategory;
global $_user;
global $_course;
global $nameTools;
global $urllink;
global $title;
global $description;
global $category;
global $selectcategory;
global $description;
global $category_title;
global $onhomepage;
$tbl_link = Database :: get_course_table(TABLE_LINK);
$tbl_categories = Database :: get_course_table(TABLE_LINK_CATEGORY);
if ($type == "link")
{
// this is used to populate the link-form with the info found in the database
$sql = "SELECT * FROM ".$tbl_link." WHERE id='".$_GET['id']."'";
$result = Database::query($sql, __FILE__, __LINE__);
if ($myrow = Database::fetch_array($result))
{
$urllink = $myrow["url"];
$title = $myrow["title"];
$description = $myrow["description"];
$category = $myrow["category_id"];
if ($myrow["on_homepage"] <> 0)
{
$onhomepage = "checked";
}
}
// this is used to put the modified info of the link-form into the database
if ($_POST['submitLink'])
{
if ($_POST['onhomepage'] == '') {
$onhomepage = 0;
$mytarget='';
} else {
$onhomepage = Security::remove_XSS($_POST['onhomepage']);
$target = Security::remove_XSS($_POST['target_link']);
$mytarget=",target='".$target."'";
}
// finding the old category_id
$sql = "SELECT * FROM ".$tbl_link." WHERE id='".Database::escape_string(Security::remove_XSS($_POST['id']))."'";
$result = Database::query($sql, __FILE__, __LINE__);
$row = Database::fetch_array($result);
$category_id = $row['category_id'];
if ($category_id <> $_POST['selectcategory']) {
$sql = "SELECT MAX(display_order) FROM ".$tbl_link." WHERE category_id='".$_POST['selectcategory']."'";
$result = Database::query($sql);
list ($max_display_order) = Database::fetch_row($result);
$max_display_order ++;
} else {
$max_display_order = $row['display_order'];
}
$sql = "UPDATE ".$tbl_link." set url='".Database::escape_string(Security::remove_XSS($_POST['urllink']))."', title='".Database::escape_string(Security::remove_XSS($_POST['title']))."', description='".Database::escape_string(Security::remove_XSS($_POST['description']))."', category_id='".Database::escape_string(Security::remove_XSS($_POST['selectcategory']))."', display_order='".$max_display_order."', on_homepage='".Database::escape_string(Security::remove_XSS($onhomepage))." ' $mytarget WHERE id='".Database::escape_string(Security::remove_XSS($_POST['id']))."'";
Database::query($sql, __FILE__, __LINE__);
// update search enchine and its values table if enabled
if (api_get_setting('search_enabled')=='true') {
$link_id = $_POST['id'];
$course_id = api_get_course_id();
$link_url = $_POST['urllink'];
$link_title = $_POST['title'];
$link_description = $_POST['description'];
// actually, it consists on delete terms from db, insert new ones, create a new search engine document, and remove the old one
// get search_did
$tbl_se_ref = Database::get_main_table(TABLE_MAIN_SEARCH_ENGINE_REF);
$sql = 'SELECT * FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_high_level=%s LIMIT 1';
$sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_LINK, $link_id);
$res = Database::query($sql, __FILE__, __LINE__);
if (Database::num_rows($res) > 0) {
require_once(api_get_path(LIBRARY_PATH) . 'search/DokeosIndexer.class.php');
require_once(api_get_path(LIBRARY_PATH) . 'search/IndexableChunk.class.php');
require_once(api_get_path(LIBRARY_PATH) . 'specific_fields_manager.lib.php');
$se_ref = Database::fetch_array($res);
$specific_fields = get_specific_field_list();
$ic_slide = new IndexableChunk();
$all_specific_terms = '';
foreach ($specific_fields as $specific_field) {
delete_all_specific_field_value($course_id, $specific_field['id'], TOOL_LINK, $link_id);
if (isset($_REQUEST[$specific_field['code']])) {
$sterms = trim($_REQUEST[$specific_field['code']]);
if (!empty($sterms)) {
$all_specific_terms .= ' '. $sterms;
$sterms = explode(',', $sterms);
foreach ($sterms as $sterm) {
$ic_slide->addTerm(trim($sterm), $specific_field['code']);
add_specific_field_value($specific_field['id'], $course_id, TOOL_LINK, $link_id, $sterm);
}
}
}
}
// build the chunk to index
$ic_slide->addValue("title", $link_title);
$ic_slide->addCourseId($course_id);
$ic_slide->addToolId(TOOL_LINK);
$xapian_data = array(
SE_COURSE_ID => $course_id,
SE_TOOL_ID => TOOL_LINK,
SE_DATA => array('link_id' => (int)$link_id),
SE_USER => (int)api_get_user_id(),
);
$ic_slide->xapian_data = serialize($xapian_data);
$link_description = $all_specific_terms .' '. $link_description;
$ic_slide->addValue("content", $link_description);
// add category name if set
if (isset($_POST['selectcategory']) && $selectcategory>0) {
$table_link_category = Database::get_course_table(TABLE_LINK_CATEGORY);
$sql_cat = 'SELECT * FROM %s WHERE id=%d LIMIT 1';
$sql_cat = sprintf($sql_cat, $table_link_category, (int)$selectcategory);
$result = Database::query($sql_cat, __FILE__, __LINE__);
if (Database::num_rows($result) == 1) {
$row = Database::fetch_array($result);
$ic_slide->addValue("category", $row['category_title']);
}
}
$di = new DokeosIndexer();
isset($_POST['language'])? $lang=Database::escape_string($_POST['language']): $lang = 'english';
$di->connectDb(NULL, NULL, $lang);
$di->remove_document((int)$se_ref['search_did']);
$di->addChunk($ic_slide);
//index and return search engine document id
$did = $di->index();
if ($did) {
// save it to db
$sql = 'DELETE FROM %s WHERE course_code=\'%s\' AND tool_id=\'%s\' AND ref_id_high_level=\'%s\'';
$sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_LINK, $link_id);
Database::query($sql,__FILE__,__LINE__);
//var_dump($sql);
$sql = 'INSERT INTO %s (id, course_code, tool_id, ref_id_high_level, search_did)
VALUES (NULL , \'%s\', \'%s\', %s, %s)';
$sql = sprintf($sql, $tbl_se_ref, $course_id, TOOL_LINK, $link_id, $did);
Database::query($sql,__FILE__,__LINE__);
}
}
}
// "WHAT'S NEW" notification: update table last_toolEdit
api_item_property_update($_course, TOOL_LINK, $_POST['id'], "LinkUpdated", $_user['user_id']);
Display::display_confirmation_message(get_lang('LinkModded'));
}
}
if ($type == "category")
{
// this is used to populate the category-form with the info found in the database
if (!$submitCategory)
{
$sql = "SELECT * FROM ".$tbl_categories." WHERE id='".$_GET['id']."'";
$result = Database::query($sql, __FILE__, __LINE__);
if ($myrow = Database::fetch_array($result))
{
$category_title = $myrow["category_title"];
$description = $myrow["description"];
}
}
// this is used to put the modified info of the category-form into the database
if ($submitCategory)
{
$sql = "UPDATE ".$tbl_categories." set category_title='".Database::escape_string(Security::remove_XSS($_POST['category_title']))."', description='".Database::escape_string(Security::remove_XSS($_POST['description']))."' WHERE id='".Database::escape_string(Security::remove_XSS($_POST['id']))."'";
Database::query($sql, __FILE__, __LINE__);
Display::display_confirmation_message(get_lang('CategoryModded'));
}
}
}
// END of function editlinkcat
/**
* creates a correct $view for in the URL
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function makedefaultviewcode($locatie)
{
global $aantalcategories;
global $view;
for ($j = 0; $j <= $aantalcategories -1; $j ++)
{
$view[$j] = 0;
}
$view[intval($locatie)] = "1";
}
// END of function makedefaultviewcode
/**
* changes the visibility of a link
* @todo add the changing of the visibility of a course
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function change_visibility($id, $scope)
{
global $_course;
global $_user;
$TABLE_ITEM_PROPERTY = Database :: get_course_table(TABLE_ITEM_PROPERTY);
if ($scope == "link")
{
$sqlselect = "SELECT * FROM $TABLE_ITEM_PROPERTY WHERE tool='".TOOL_LINK."' and ref='".Database::escape_string($id)."'";
$result = Database::query($sqlselect);
$row = Database::fetch_array($result);
api_item_property_update($_course, TOOL_LINK, $id, $_GET['action'], $_user['user_id']);
}
Display::display_confirmation_message(get_lang('VisibilityChanged'));
}
/**
* displays all the links of a given category.
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function showlinksofcategory($catid)
{
global $is_allowed, $charset, $urlview, $up, $down, $_user;
$tbl_link = Database :: get_course_table(TABLE_LINK);
$TABLE_ITEM_PROPERTY = Database :: get_course_table(TABLE_ITEM_PROPERTY);
//condition for the session
$session_id = api_get_session_id();
$condition_session = api_get_session_condition($session_id);
$sqlLinks = "SELECT * FROM ".$tbl_link." link, ".$TABLE_ITEM_PROPERTY." itemproperties WHERE itemproperties.tool='".TOOL_LINK."' AND link.id=itemproperties.ref AND link.category_id='".$catid."' AND (itemproperties.visibility='0' OR itemproperties.visibility='1') $condition_session ORDER BY link.display_order DESC";
$result = Database::query($sqlLinks);
$numberoflinks = Database::num_rows($result);
echo '<table class="data_table" width="100%">';
$i = 1;
while ($myrow = Database::fetch_array($result)) {
//validacion when belongs to a session
$session_img = api_get_session_image($myrow['session_id'], $_user['status']);
if($i%2==0) $css_class = 'row_odd';
else $css_class = 'row_even';
$myrow[3] = text_filter($myrow[3]);
if ($myrow['visibility'] == '1')
{
echo "<tr class='".$css_class."'>", "<td align=\"center\" valign=\"middle\" width=\"15\">", "<a href=\"link_goto.php?".api_get_cidreq()."&link_id=", $myrow[0], "&amp;link_url=", urlencode($myrow[1]), "\" target=\"_blank\">", "<img src=\"../../main/img/file_html.gif\" border=\"0\" alt=\"".get_lang('Link')."\"/>", "</a></td>", "<td width=\"80%\" valign=\"top\">", "<a href=\"link_goto.php?".api_get_cidreq()."&link_id=", $myrow[0], "&amp;link_url=", urlencode($myrow[1]), "\" target=\"_blank\">", api_htmlentities($myrow[2],ENT_QUOTES,$charset), "</a>", $session_img , "<br/>", $myrow[3], "";
}
else
{
if (api_is_allowed_to_edit(null,true))
{
echo "<tr class='".$css_class."'>", "<td align=\"center\" valign=\"middle\" width=\"15\">", "<a href=\"link_goto.php?".api_get_cidreq()."&link_id=", $myrow[0], "&amp;link_url=", urlencode($myrow[1]), "\" target=\"_blank\" class=\"invisible\">", Display::return_icon('file_html_na.gif', get_lang('Link')),"</a></td>", "<td width=\"80%\" valign=\"top\">", "<a href=\"link_goto.php?".api_get_cidreq()."&link_id=", $myrow[0], "&amp;link_url=", urlencode($myrow[1]), "\" target=\"_blank\" class=\"invisible\">", api_htmlentities($myrow[2],ENT_QUOTES,$charset), "</a>\n", $session_img , "<br />", $myrow[3], "";
}
}
echo '<td style="text-align:center;">';
if (api_is_allowed_to_edit(null,true))
{
echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&action=editlink&amp;category=".(!empty($category)?$category:'')."&amp;id=".$myrow[0]." &amp;urlview=$urlview \" title=\"".get_lang('Modify')."\" >", "<img src=\"../img/edit.gif\" border=\"0\" alt=\"", get_lang('Modify'), "\" />", "</a>";
echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&action=deletelink&amp;id=", $myrow[0], "&amp;urlview=", $urlview, "\" onclick=\"javascript:if(!confirm('".get_lang('LinkDelconfirm')."')) return false;\" title=\"".get_lang('Delete')."\" >", "<img src=\"../img/delete.gif\" border=\"0\" alt=\"", get_lang('Delete'), "\" />", "</a>";
// DISPLAY MOVE UP COMMAND only if it is not the top link
if ($i != 1)
{
echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&urlview=".$urlview."&amp;up=", $myrow["id"], "\" title=\"".get_lang('Up')."\" >", "<img src=../img/up.gif border=0 alt=\"".get_lang('Up')."\"/>", "</a>\n";
}
else
{
echo '<img src="'.api_get_path(WEB_IMG_PATH).'up_na.gif" border=0 alt="'.get_lang('Up').'"/>';
}
// DISPLAY MOVE DOWN COMMAND only if it is not the bottom link
if ($i < $numberoflinks)
{
echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&urlview=".$urlview."&amp;down=".$myrow["id"]."\" title=\"".get_lang('Down')."\" >", "<img src=\"../img/down.gif\" border=\"0\" alt=\"".get_lang('Down')."\"/>", "</a>\n";
}
else
{
echo '<img src="'.api_get_path(WEB_IMG_PATH).'down_na.gif" border=0 alt="'.get_lang('Down').'"/>';
}
if ($myrow['visibility'] == "1")
{
echo '<a href="link.php?'.api_get_cidreq().'&action=invisible&amp;id='.$myrow['id'].'&amp;scope=link&amp;urlview='.$urlview.'" title="'.get_lang('Hide').'"><img src="../img/visible.gif" border="0" /></a>';
}
if ($myrow['visibility'] == "0")
{
echo '<a href="link.php?'.api_get_cidreq().'&action=visible&amp;id='.$myrow['id'].'&amp;scope=link&amp;urlview='.$urlview.'" title="'.get_lang('Show').'"><img src="../img/invisible.gif" border="0" /></a>';
}
}
echo '</td>';
echo '</tr>';
$i ++;
}
echo '</table>';
}
/**
* displays the edit, delete and move icons
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function showcategoryadmintools($categoryid)
{
global $urlview;
global $aantalcategories;
global $catcounter;
echo '<a href="'.api_get_self().'?'.api_get_cidreq().'&action=editcategory&amp;id='.$categoryid.'&amp;urlview='.$urlview.'" title='.get_lang('Modify').' "><img src="../img/edit.gif" border="0" alt="'.get_lang('Modify').' "/></a>';
echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&action=deletecategory&amp;id=", $categoryid, "&amp;urlview=$urlview\" onclick=\"javascript:if(!confirm('".get_lang('CategoryDelconfirm')."')) return false;\">", "<img src=\"../img/delete.gif\" border=\"0\" alt=\"", get_lang('Delete'), "\"/>", "</a>";
// DISPLAY MOVE UP COMMAND only if it is not the top link
if ($catcounter != 1)
{
echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&catmove=true&amp;up=", $categoryid, "&amp;urlview=$urlview\" title=\"".get_lang('Up')."\" >", "<img src=../img/up.gif border=0 alt=\"".get_lang('Up')."\"/>", "</a>\n";
}
else
{
echo '<img src="'.api_get_path(WEB_IMG_PATH).'up_na.gif" border=0 alt="'.get_lang('Up').'"/>';
}
// DISPLAY MOVE DOWN COMMAND only if it is not the bottom link
if ($catcounter < $aantalcategories)
{
echo "<a href=\"".api_get_self()."?".api_get_cidreq()."&catmove=true&amp;down=".$categoryid."&amp;urlview=$urlview\">", "<img src=\"../img/down.gif\" border=\"0\" alt=\"".get_lang('Down')."\"/>", "</a>\n";
}
else
{
echo '<img src="'.api_get_path(WEB_IMG_PATH).'down_na.gif" border=0 alt="'.get_lang('Down').'"/>';
}
$catcounter ++;
}
/**
* move a link or a linkcategory up or down
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function movecatlink($catlinkid)
{
global $catmove;
global $up;
global $down;
$tbl_link = Database :: get_course_table(TABLE_LINK);
$tbl_categories = Database :: get_course_table(TABLE_LINK_CATEGORY);
if (!empty($_GET['down']))
{
$thiscatlinkId = $_GET['down'];
$sortDirection = "DESC";
}
if (!empty($_GET['up']))
{
$thiscatlinkId = Security::remove_XSS($_GET['up']);
$sortDirection = "ASC";
}
// We check if it is a category we are moving or a link. If it is a category, a querystring catmove = true is present in the url
if ($catmove == "true")
{
$movetable = $tbl_categories;
$catid = $catlinkid;
}
else
{
$movetable = $tbl_link;
//getting the category of the link
if(!empty($thiscatlinkId))
{
$sql = "SELECT category_id from ".$movetable." WHERE id='$thiscatlinkId'";
$result = Database::query($sql, __FILE__, __LINE__);
$catid = Database::fetch_array($result);
}
}
// this code is copied and modified from announcements.php
if (!empty($sortDirection))
{
if (!in_array(trim(strtoupper($sortDirection)), array ('ASC', 'DESC')))
die("Bad sort direction used."); //sanity check of sortDirection var
if ($catmove == "true")
{
$sqlcatlinks = "SELECT id, display_order FROM ".$movetable." ORDER BY display_order $sortDirection";
}
else
{
$sqlcatlinks = "SELECT id, display_order FROM ".$movetable." WHERE category_id='".$catid[0]."' ORDER BY display_order $sortDirection";
}
$linkresult = Database::query($sqlcatlinks);
while ($sortrow = Database::fetch_array($linkresult))
{
// STEP 2 : FOUND THE NEXT ANNOUNCEMENT ID AND ORDER, COMMIT SWAP
// This part seems unlogic, but it isn't . We first look for the current link with the querystring ID
// and we know the next iteration of the while loop is the next one. These should be swapped.
if (isset ($thislinkFound) && $thislinkFound == true)
{
$nextlinkId = $sortrow["id"];
$nextlinkOrdre = $sortrow["display_order"];
Database::query("UPDATE ".$movetable."
SET display_order = '$nextlinkOrdre'
WHERE id = '$thiscatlinkId'");
Database::query("UPDATE ".$movetable."
SET display_order = '$thislinkOrdre'
WHERE id = '$nextlinkId'");
break;
}
if ($sortrow["id"] == $thiscatlinkId)
{
$thislinkOrdre = $sortrow["display_order"];
$thislinkFound = true;
}
}
}
Display::display_confirmation_message(get_lang('LinkMoved'));
}
/**
* CSV file import functions
* @author René Haentjens , Ghent University
*/
function get_cat($catname) // get category id (existing or make new)
{
$tbl_categories = Database :: get_course_table(TABLE_LINK_CATEGORY);
$result = Database::query("SELECT `id` FROM ".$tbl_categories." WHERE `category_title`='".addslashes($catname)."'", __FILE__, __LINE__);
if (Database::num_rows($result) >= 1 && ($row = Database::fetch_array($result)))
return $row['id']; // several categories with same name: take first
$result = Database::query("SELECT MAX(display_order) FROM ".$tbl_categories."", __FILE__, __LINE__);
list ($max_order) = Database::fetch_row($result);
Database::query("INSERT INTO ".$tbl_categories." (category_title, description, display_order) VALUES ('".addslashes($catname)."','','". ($max_order +1)."')", __FILE__, __LINE__);
return Database::insert_id();
}
/**
* CSV file import functions
* @author René Haentjens , Ghent University
*/
function put_link($url, $cat, $title, $description, $on_homepage, $hidden)
{
$tbl_link = Database :: get_course_table(TABLE_LINK);
$urleq = "url='".addslashes($url)."'";
$cateq = "category_id=".$cat;
$result = Database::query("SELECT id FROM $tbl_link WHERE ".$urleq.' AND '.$cateq, __FILE__, __LINE__);
if (Database::num_rows($result) >= 1 && ($row = Database::fetch_array($result)))
{
Database::query("UPDATE $tbl_link set title='".addslashes($title)."', description='".addslashes($description)."' WHERE id='".addslashes($id = $row['id'])."'", __FILE__, __LINE__);
$lang_link = get_lang('update_link');
$ipu = "LinkUpdated";
$rv = 1; // 1= upd
}
else // add new link
{
$result = Database::query("SELECT MAX(display_order) FROM $tbl_link WHERE category_id='".addslashes($cat)."'", __FILE__, __LINE__);
list ($max_order) = Database::fetch_row($result);
Database::query("INSERT INTO $tbl_link (url, title, description, category_id, display_order, on_homepage) VALUES ('".addslashes($url)."','".addslashes($title)."','".addslashes($description)."','".addslashes($cat)."','". ($max_order +1)."','".$on_homepage."')", __FILE__, __LINE__);
$id = Database::insert_id();
$lang_link = get_lang('new_link');
$ipu = "LinkAdded";
$rv = 2; // 2= new
}
global $_course, $nameTools, $_user;
api_item_property_update($_course, TOOL_LINK, $id, $ipu, $_user['user_id']);
if ($hidden && $ipu == "LinkAdded")
api_item_property_update($_course, TOOL_LINK, $id, "invisible", $_user['user_id']);
return $rv;
}
/**
* CSV file import functions
* @author René Haentjens , Ghent University
*/
function import_link($linkdata) // url, category_id, title, description, ...
{
// field names used in the uploaded file
$known_fields = array ('url', 'category', 'title', 'description', 'on_homepage', 'hidden');
$hide_fields = array ('kw', 'kwd', 'kwds', 'keyword', 'keywords');
// all other fields are added to description, as "name:value"
// only one hide_field is assumed to be present, <> is removed from value
if (!($url = trim($linkdata['url'])) || !($title = trim($linkdata['title'])))
return 0; // 0= fail
$cat = ($catname = trim($linkdata['category'])) ? get_cat($catname) : 0;
$regs = array(); // will be passed to ereg()
foreach ($linkdata as $key => $value)
if (!in_array($key, $known_fields))
if (in_array($key, $hide_fields) && ereg('^<?([^>]*)>?$', $value, $regs)) // possibly in <...>
if (($kwlist = trim($regs[1])) != '')
$kw = '<i kw="'.htmlspecialchars($kwlist).'">';
else
$kw = '';
// i.e. assume only one of the $hide_fields will be present
// and if found, hide the value as expando property of an <i> tag
elseif (trim($value)) $d .= ', '.$key.':'.$value;
if ($d)
$d = substr($d, 2).' - ';
return put_link($url, $cat, $title, $kw.ereg_replace('\[((/?(b|big|i|small|sub|sup|u))|br/)\]', '<\\1>', htmlspecialchars($d.$linkdata['description'])). ($kw ? '</i>' : ''), $linkdata['on_homepage'] ? '1' : '0', $linkdata['hidden'] ? '1' : '0');
// i.e. allow some BBcode tags, e.g. [b]...[/b]
}
/**
* CSV file import functions
* @author René Haentjens , Ghent University
*/
function import_csvfile()
{
global $catlinkstatus; // feedback message to user
if (is_uploaded_file($filespec = $_FILES['import_file']['tmp_name']) && filesize($filespec) && ($myFile = @ fopen($filespec, 'r')))
{
// read first line of file (column names) and find ',' or ';'
$listsep = strpos($colnames = trim(fgets($myFile)), ',') !== FALSE ? ',' : (strpos($colnames, ';') !== FALSE ? ';' : '');
if ($listsep)
{
$columns = array_map('strtolower', explode($listsep, $colnames));
if (in_array('url', $columns) && in_array('title', $columns))
{
$stats = array (0, 0, 0); // fails, updates, inserts
// Modified by Ivan Tcholakov, 01-FEB-2010.
//while (($data = fgetcsv($myFile, 32768, $listsep)))
while (($data = api_fgetcsv($myFile, null, $listsep)))
//
{
foreach ($data as $i => $text)
$linkdata[$columns[$i]] = $text;
// $linkdata['url', 'title', ...]
$stats[import_link($linkdata)]++;
unset ($linkdata);
}
$catlinkstatus = '';
if ($stats[0])
$catlinkstatus .= $stats[0].' '.get_lang('CsvLinesFailed');
if ($stats[1])
$catlinkstatus .= $stats[1].' '.get_lang('CsvLinesOld');
if ($stats[2])
$catlinkstatus .= $stats[2].' '.get_lang('CsvLinesNew');
}
else
$catlinkstatus = get_lang('CsvFileNoURL'). ($colnames ? get_lang('CsvFileLine1').htmlspecialchars(substr($colnames, 0, 200)).'...' : '');
}
else
$catlinkstatus = get_lang('CsvFileNoSeps'). ($colnames ? get_lang('CsvFileLine1').htmlspecialchars(substr($colnames, 0, 200)).'...' : '');
fclose($myFile);
}
else
$catlinkstatus = get_lang('CsvFileNotFound');
}