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

1068 lines
41 KiB

<?php
/* For licensing terms, see /license.txt */
/**
* 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 chamilo.link
*/
/* FUNCTIONS */
class Link extends Model
{
public $table;
public $is_course_model = true;
public $columns = array('id', 'c_id','url','title','description','category_id', 'display_order', 'on_homepage', 'target', 'session_id');
public $required = array('url', 'title');
public function __construct()
{
$this->table = Database::get_course_table(TABLE_LINK);
}
public function save($params, $show_query = null)
{
$course_info = api_get_course_info();
$params['session_id'] = api_get_session_id();
$params['category_id'] = isset($params['category_id']) ? $params['category_id'] : 0;
$id = parent::save($params, $show_query);
if (!empty($id)) {
api_item_property_update($course_info, TOOL_LINK, $id, 'LinkAdded', api_get_user_id());
}
return $id;
}
}
/**
* 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;
$course_id = api_get_course_int_id();
if ($type == 'link') {
$tbl_link = Database :: get_course_table(TABLE_LINK);
$title = Security :: remove_XSS(stripslashes($_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;
} else {
$onhomepage = Security :: remove_XSS($_POST['onhomepage']);
}
if (empty($_POST['target_link'])) {
$target = '_self'; // Default target.
} else {
$target = Security :: remove_XSS($_POST['target_link']);
}
$urllink = trim($urllink);
$title = trim($title);
$description = trim($description);
// We ensure URL to be absolute.
if (strpos($urllink, '://') === false) {
$urllink = 'http://' . $urllink;
}
// If the title is empty, we use the URL as title.
if ($title == '') {
$title = $urllink;
}
// If the URL is invalid, an error occurs.
// Ivan, 13-OCT-2010, Chamilo 1.8.8: Let us still tolerate PHP 5.1.x and avoid a specific bug in filter_var(), see http://bugs.php.net/51192
//if (!filter_var($urllink, FILTER_VALIDATE_URL)) {
if (!api_valid_url($urllink, true)) { // A check against an absolute URL
$msgErr = get_lang('GiveURL');
Display :: display_error_message(get_lang('GiveURL'));
$ok = false;
} else {
// Looking for the largest order number for this category.
$result = Database :: query("SELECT MAX(display_order) FROM " . $tbl_link . " WHERE c_id = $course_id AND category_id = '" . intval($_POST['selectcategory']) . "'");
list ($orderMax) = Database :: fetch_row($result);
$order = $orderMax +1;
$session_id = api_get_session_id();
$sql = "INSERT INTO " . $tbl_link . " (c_id, url, title, description, category_id, display_order, on_homepage, target, session_id)
VALUES (".$course_id.", '".Database :: escape_string($urllink) . "','" . Database :: escape_string($title) . "','" . Database :: escape_string($description) . "','" .
Database :: escape_string($selectcategory) . "','" . Database :: escape_string($order) . "', '" . Database :: escape_string($onhomepage) . "','" .
Database :: escape_string($target) . "','" . Database :: escape_string($session_id) . "')";
$catlinkstatus = get_lang('LinkAdded');
Database :: query($sql);
$link_id = Database :: insert_id();
if ($link_id) {
api_set_default_visibility($link_id, TOOL_LINK);
}
if ((api_get_setting('search_enabled') == 'true') && $link_id && extension_loaded('xapian')) {
require_once api_get_path(LIBRARY_PATH) . 'search/ChamiloIndexer.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';
$course_int_id = api_get_course_int_id();
$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 AND c_id = %d LIMIT 1';
$sql_cat = sprintf($sql_cat, $table_link_category, (int) $selectcategory, $course_int_id);
$result = Database :: query($sql_cat);
if (Database :: num_rows($result) == 1) {
$row = Database :: fetch_array($result);
$ic_slide->addValue('category', $row['category_title']);
}
}
$di = new ChamiloIndexer();
isset ($_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 (c_id, id, course_code, tool_id, ref_id_high_level, search_did)
VALUES (NULL , \'%s\', \'%s\', %s, %s)';
$sql = sprintf($sql, $tbl_se_ref, $course_int_id, $courseid, TOOL_LINK, $link_id, $did);
Database :: query($sql);
}
}
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." WHERE c_id = $course_id ");
list ($orderMax) = Database :: fetch_row($result);
$order = $orderMax +1;
$order = intval($order);
$session_id = api_get_session_id();
$sql = "INSERT INTO ".$tbl_categories." (c_id, category_title, description, display_order, session_id)
VALUES (".$course_id.", '" .Database::escape_string($category_title) . "', '" . Database::escape_string($description) . "', '$order', '$session_id')";
Database :: query($sql);
$catlinkstatus = get_lang('CategoryAdded');
unset ($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 $ok;
}
/**
* Used to delete a link or a category
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function deletelinkcategory($type)
{
global $catlinkstatus;
global $_course;
$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);
$course_id = api_get_course_int_id();
if ($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 c_id = $course_id AND id='" . intval($_GET['id']) . "'";
Database :: query($sql);
}
api_item_property_update($_course, TOOL_LINK, $id, 'delete', api_get_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 $id;
if (isset ($_GET['id']) && !empty ($_GET['id'])) {
// First we delete the category itself and afterwards all the links of this category.
$sql = "DELETE FROM " . $tbl_categories . " WHERE c_id = $course_id AND id='" . intval($_GET['id']) . "'";
Database :: query($sql);
$sql = "DELETE FROM " . $tbl_link . " WHERE c_id = $course_id AND category_id='" . intval($_GET['id']) . "'";
$catlinkstatus = get_lang('CategoryDeleted');
unset ($id);
Database :: query($sql);
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);
if (Database :: num_rows($res) > 0) {
$row = Database :: fetch_array($res);
require_once api_get_path(LIBRARY_PATH) . 'search/ChamiloIndexer.class.php';
$di = new ChamiloIndexer();
$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);
// 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, $link_id);
}
}
/**
*
* Get link info
* @param int link id
* @return array link info
*
* */
function get_link_info($id)
{
$tbl_link = Database :: get_course_table(TABLE_LINK);
$course_id = api_get_course_int_id();
$sql = "SELECT * FROM " . $tbl_link . " WHERE c_id = $course_id AND id='" . intval($id) . "' ";
$result = Database::query($sql);
if (Database::num_rows($result)) {
$data = Database::fetch_array($result);
}
return $data;
}
/**
* 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 $submit_link;
global $submit_category;
global $_user;
global $_course;
global $nameTools;
global $urllink;
global $title;
global $description;
global $category;
global $selectcategory;
global $description;
global $category_title;
global $onhomepage;
global $target_link;
$tbl_link = Database :: get_course_table(TABLE_LINK);
$tbl_categories = Database :: get_course_table(TABLE_LINK_CATEGORY);
$course_id = api_get_course_int_id();
if ($type == 'link') {
// This is used to populate the link-form with the info found in the database.
if (!empty ($_GET['id'])) {
$sql = "SELECT * FROM " . $tbl_link . " WHERE c_id = $course_id AND id='" . intval($_GET['id']) . "'";
$result = Database :: query($sql);
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';
}
$target_link = $myrow['target'];
}
}
// This is used to put the modified info of the link-form into the database.
if ($_POST['submitLink']) {
// Ivan, 13-OCT-2010: It is a litle bit messy code below, just in case I added some extra-security checks here.
$_POST['urllink'] = trim($_POST['urllink']);
$_POST['title'] = trim(Security :: remove_XSS($_POST['title']));
$_POST['description'] = trim(Security :: remove_XSS($_POST['description']));
$_POST['selectcategory'] = intval($_POST['selectcategory']);
$_POST['id'] = intval($_POST['id']);
// We ensure URL to be absolute.
if (strpos($_POST['urllink'], '://') === false) {
$_POST['urllink'] = 'http://' . $_POST['urllink'];
}
// If the title is empty, we use the URL as title.
if ($_POST['title'] == '') {
$_POST['title'] = $_POST['urllink'];
}
// If the URL is invalid, an error occurs.
// Ivan, 13-OCT-2010, Chamilo 1.8.8: Let us still tolerate PHP 5.1.x and avoid a specific bug in filter_var(), see http://bugs.php.net/51192
//if (!filter_var($urllink, FILTER_VALIDATE_URL)) {
if (!api_valid_url($urllink, true)) { // A check against an absolute URL.
$msgErr = get_lang('GiveURL');
Display :: display_error_message(get_lang('GiveURL'));
return false;
}
$onhomepage = Security :: remove_XSS($_POST['onhomepage']);
$target = Database::escape_string($_POST['target_link']);
if (empty ($mytarget)) {
$mytarget = '_self';
}
$mytarget = ",target='" . $target . "'";
// Finding the old category_id.
$sql = "SELECT * FROM " . $tbl_link . " WHERE c_id = $course_id AND id='" . intval($_POST['id']) . "'";
$result = Database :: query($sql);
$row = Database :: fetch_array($result);
$category_id = $row['category_id'];
if ($category_id != $_POST['selectcategory']) {
$sql = "SELECT MAX(display_order) FROM " . $tbl_link . " WHERE c_id = $course_id AND category_id='" . intval($_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 " . $tbl_link . " SET " .
"url='" . Database :: escape_string($_POST['urllink']) . "', " .
"title='" . Database :: escape_string($_POST['title']) . "', " .
"description='" . Database :: escape_string($_POST['description']) . "', " .
"category_id='" . Database :: escape_string($_POST['selectcategory']) . "', " .
"display_order='" . $max_display_order . "', " .
"on_homepage='" . Database :: escape_string($onhomepage) . " ' $mytarget " .
" WHERE c_id = $course_id AND id='" . intval($_POST['id']) . "'";
Database :: query($sql);
// Update search enchine and its values table if enabled.
if (api_get_setting('search_enabled') == 'true') {
$link_id = intval($_POST['id']);
$course_int_id = api_get_course_int_id();
$course_id = api_get_course_id();
$link_url = Database :: escape_string($_POST['urllink']);
$link_title = Database :: escape_string($_POST['title']);
$link_description = Database :: escape_string($_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);
if (Database :: num_rows($res) > 0) {
require_once api_get_path(LIBRARY_PATH) . 'search/ChamiloIndexer.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 and c_id = %d LIMIT 1';
$sql_cat = sprintf($sql_cat, $table_link_category, (int) $selectcategory, $course_int_id);
$result = Database :: query($sql_cat);
if (Database :: num_rows($result) == 1) {
$row = Database :: fetch_array($result);
$ic_slide->addValue('category', $row['category_title']);
}
}
$di = new ChamiloIndexer();
isset ($_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);
$sql = 'INSERT INTO %s (c_id, id, course_code, tool_id, ref_id_high_level, search_did)
VALUES (NULL , \'%s\', \'%s\', %s, %s)';
$sql = sprintf($sql, $tbl_se_ref, $course_int_id, $course_id, TOOL_LINK, $link_id, $did);
Database :: query($sql);
}
}
}
// "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 (!$submit_category) {
$sql = "SELECT * FROM " . $tbl_categories . " WHERE c_id = $course_id AND id='" . intval($_GET['id']) . "'";
$result = Database :: query($sql);
if ($myrow = Database :: fetch_array($result)) {
$category_title = $myrow['category_title'];
$description = $myrow['description'];
}
}
// This is used to put the modified info of the category-form into the database.
if ($submit_category) {
$sql = "UPDATE " . $tbl_categories . "
SET category_title='" . Database :: escape_string($_POST['category_title']) . "', description='" . Database :: escape_string($_POST['description']) . "'
WHERE c_id = $course_id AND id='" . Database :: escape_string($_POST['id']) . "'";
Database :: query($sql);
Display :: display_confirmation_message(get_lang('CategoryModded'));
}
}
return true; // On errors before this statement, exit from this function by returning false value.
}
/**
* Creates a correct $view for in the URL
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function makedefaultviewcode($locatie) {
global $aantalcategories, $view;
for ($j = 0; $j <= $aantalcategories -1; $j++) {
$view[$j] = 0;
}
$view[intval($locatie)] = '1';
}
/**
* 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, $_user;
if ($scope == 'link') {
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, $token;
$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, true, true);
$catid = intval($catid);
$course_id = api_get_course_int_id();
$sqlLinks = "SELECT *, link.id 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')
$condition_session AND
link.c_id = ".$course_id." AND
itemproperties.c_id = ".$course_id."
ORDER BY link.display_order DESC";
$result = Database :: query($sqlLinks);
$numberoflinks = Database :: num_rows($result);
if ($numberoflinks > 0) {
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']);
$css_class = $i % 2 == 0 ? $css_class = 'row_odd' : $css_class = 'row_even';
$link_validator = '';
if (api_is_allowed_to_edit(null, true)) {
$link_validator = ''.Display::url(Display::return_icon('preview_view.png', get_lang('CheckURL'), array(), 16), '#', array('onclick'=>"check_url('".$myrow['id']."', '".addslashes($myrow['url'])."');"));
$link_validator .= Display::span('', array('id'=>'url_id_'.$myrow['id']));
}
if ($myrow['visibility'] == '1') {
echo '<tr class="'.$css_class.'">';
echo '<td align="center" valign="middle" width="15">';
echo '<a href="link_goto.php?'.api_get_cidreq().'&amp;link_id='.$myrow['id'].'&amp;link_url='.urlencode($myrow['url']).'" target="_blank">
<img src="../../main/img/link.gif" border="0" alt="'.get_lang('Link').'"/></a></td>
<td width="80%" valign="top"><a href="link_goto.php?'.api_get_cidreq().'&amp;link_id='.$myrow['id'].'&amp;link_url='.urlencode($myrow['url']).'" target="'.$myrow['target'].'">';
echo Security :: remove_XSS($myrow['title']);
echo '</a>';
echo $link_validator;
echo $session_img;
echo '<br />'.$myrow['description'];
} else {
if (api_is_allowed_to_edit(null, true)) {
echo '<tr class="'.$css_class.'">';
echo '<td align="center" valign="middle" width="15"><a href="link_goto.php?'.api_get_cidreq().'&amp;link_id='.$myrow['id']."&amp;link_url=".urlencode($myrow['url']).'" target="_blank" class="invisible">';
echo Display :: return_icon('link_na.gif', get_lang('Link')), '</a>';
echo '</td><td width="80%" valign="top"><a href="link_goto.php?', api_get_cidreq(), '&amp;link_id=', $myrow['id'], '&amp;link_url=', urlencode($myrow['url']),'" target="', $myrow['target'], '" class="invisible">';
echo Security :: remove_XSS($myrow['url']);
echo "</a>";
echo $link_validator;
echo $session_img, '<br />', $myrow['title'];
}
}
echo '<td style="text-align:center;">';
if (api_is_allowed_to_edit(null, true)) {
if ($session_id == $myrow['session_id']) {
echo '<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;action=editlink&amp;category=' . (!empty ($category) ? $category : '') . '&amp;id=' . $myrow['id'] . '&amp;urlview=' . $urlview . '" title="' . get_lang('Modify') . '">' .
Display :: return_icon('edit.png', get_lang('Modify'), array (), ICON_SIZE_SMALL) . '</a>';
// DISPLAY MOVE UP COMMAND only if it is not the top link.
/*
if ($i != 1) {
echo '<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;urlview=' . $urlview . '&amp;up=', $myrow[0], '" title="' . get_lang('Up') . '">' . Display :: return_icon('up.png', get_lang('Up'), array (), ICON_SIZE_SMALL) . '', "</a>\n";
} else {
echo Display :: return_icon('up_na.png', get_lang('Up'), array (), ICON_SIZE_SMALL) . '</a>';
}
// DISPLAY MOVE DOWN COMMAND only if it is not the bottom link.
if ($i < $numberoflinks) {
echo '<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;urlview=' . $urlview . '&amp;down=' . $myrow[0] . '" title="' . get_lang('Down') . '">' . Display :: return_icon('down.png', get_lang('Down'), array (), ICON_SIZE_SMALL) . '', "</a>\n";
} else {
echo Display :: return_icon('down_na.png', get_lang('Down'), array (), ICON_SIZE_SMALL) . '', "</a>\n";
}*/
if ($myrow['visibility'] == '1') {
echo '<a href="link.php?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;action=invisible&amp;id=' . $myrow['id'] . '&amp;scope=link&amp;urlview=' . $urlview . '" title="' . get_lang('Hide') . '">' .
Display :: return_icon('visible.png', get_lang('Hide'), array (), ICON_SIZE_SMALL) . '</a>';
}
if ($myrow['visibility'] == '0') {
echo ' <a href="link.php?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;action=visible&amp;id=' . $myrow['id'] . '&amp;scope=link&amp;urlview=' . $urlview . '" title="' . get_lang('Show') . '">' .
Display :: return_icon('invisible.png', get_lang('Show'), array (), ICON_SIZE_SMALL) . '</a>';
}
echo ' <a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;action=deletelink&amp;id=', $myrow['id'], '&amp;urlview=', $urlview, "\" onclick=\"javascript: if(!confirm('" . get_lang('LinkDelconfirm') . "')) return false;\" title=\"" . get_lang('Delete') . '">' .
Display :: return_icon('delete.png', get_lang('Delete'), array (), ICON_SIZE_SMALL) . '</a>';
} else {
echo Display :: return_icon('edit_na.png', get_lang('EditionNotAvailableFromSession'), array (), ICON_SIZE_SMALL); //get_lang('EditionNotAvailableFromSession');
}
}
echo '</td></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, $aantalcategories, $catcounter, $token;
echo '<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;action=editcategory&amp;id=' . $categoryid . '&amp;urlview=' . $urlview . '" title=' . get_lang('Modify') . '">' . Display :: return_icon('edit.png', get_lang('Modify'), array (), ICON_SIZE_SMALL) . '</a>';
// DISPLAY MOVE UP COMMAND only if it is not the top link.
if ($catcounter != 1) {
echo '<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;catmove=true&amp;up=', $categoryid, '&amp;urlview=' . $urlview . '" title="' . get_lang('Up') . '">' . Display :: return_icon('up.png', get_lang('Up'), array (), ICON_SIZE_SMALL) . '</a>';
} else {
echo Display :: return_icon('up_na.png', get_lang('Up'), array (), ICON_SIZE_SMALL) . '</a>';
}
// DISPLAY MOVE DOWN COMMAND only if it is not the bottom link.
if ($catcounter < $aantalcategories) {
echo '<a href="' . api_get_self() . '?' . api_get_cidreq() .'&amp;sec_token='.$token.'&amp;catmove=true&amp;down=' . $categoryid . '&amp;urlview=' . $urlview . '">
' . Display :: return_icon('down.png', get_lang('Down'), array (), ICON_SIZE_SMALL) . '</a>';
} else {
echo Display :: return_icon('down_na.png', get_lang('Down'), array (), ICON_SIZE_SMALL) . '</a>';
}
echo '<a href="' . api_get_self() . '?' . api_get_cidreq() . '&amp;sec_token='.$token.'&amp;action=deletecategory&amp;id=', $categoryid, "&amp;urlview=$urlview\" onclick=\"javascript: if(!confirm('" . get_lang('CategoryDelconfirm') . "')) return false;\">", Display :: return_icon('delete.png', get_lang('Delete'), array (), ICON_SIZE_SMALL) . '</a>';
$catcounter++;
}
/**
* move a link or a linkcategory up or down
* @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
*/
function movecatlink($catlinkid) {
global $catmove;
global $up;
global $down;
$tbl_link = Database :: get_course_table(TABLE_LINK);
$tbl_categories = Database :: get_course_table(TABLE_LINK_CATEGORY);
$course_id = api_get_course_int_id();
if (!empty ($down)) {
$thiscatlinkId = intval($down);
$sortDirection = 'DESC';
}
if (!empty ($up)) {
$thiscatlinkId = intval($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 c_id = $course_id AND id='$thiscatlinkId'";
$result = Database :: query($sql);
$catid = Database :: fetch_array($result);
}
}
// This code is copied and modified from announcements.php.
if (!empty($sortDirection)) {
if (!in_array(trim(strtoupper($sortDirection)), array ('ASC', 'DESC'))){
$sortDirection = 'ASC';
}
if ($catmove == 'true') {
$sqlcatlinks = "SELECT id, display_order FROM " . $movetable . " WHERE c_id = $course_id ORDER BY display_order $sortDirection";
} else {
$sqlcatlinks = "SELECT id, display_order FROM " . $movetable . "
WHERE c_id = $course_id AND 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) {
$nextlinkId = $sortrow['id'];
$nextlinkOrdre = $sortrow['display_order'];
Database :: query("UPDATE " . $movetable . "
SET display_order = '$nextlinkOrdre'
WHERE c_id = $course_id AND id = '$thiscatlinkId'");
Database :: query("UPDATE " . $movetable . "
SET display_order = '$thislinkOrdre'
WHERE c_id = $course_id AND id = '$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);
$course_id = api_get_course_int_id();
$result = Database :: query("SELECT id FROM " . $tbl_categories . " WHERE c_id = $course_id AND category_title='" . Database::escape_string($catname) . "'");
if (Database :: num_rows($result) >= 1 && ($row = Database :: fetch_array($result))) {
return $row['id']; // Several categories with same name: take the first.
}
$result = Database :: query("SELECT MAX(display_order) FROM " . $tbl_categories." WHERE c_id = $course_id ");
list ($max_order) = Database :: fetch_row($result);
Database :: query("INSERT INTO " . $tbl_categories . " (c_id, category_title, description, display_order)
VALUES (".$course_id.", '" . Database::escape_string($catname) . "','','" . ($max_order +1) . "')");
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);
$course_id = api_get_course_int_id();
$urleq = "url='" . Database :: escape_string($url) . "'";
$cateq = "category_id=" . intval($cat);
$result = Database :: query("SELECT id FROM $tbl_link WHERE c_id = $course_id AND " . $urleq . ' AND ' . $cateq);
if (Database :: num_rows($result) >= 1 && ($row = Database :: fetch_array($result))) {
Database :: query("UPDATE $tbl_link set title='" . Database :: escape_string($title) . "', description='" . Database :: escape_string($description) . "'
WHERE c_id = $course_id AND id='" . Database :: escape_string($row['id']) . "'");
$ipu = 'LinkUpdated';
$rv = 1; // 1 = upd
} else {
// Add new link
$result = Database :: query("SELECT MAX(display_order) FROM $tbl_link WHERE c_id = $course_id AND category_id='" . intval($cat) . "'");
list ($max_order) = Database :: fetch_row($result);
Database :: query("INSERT INTO $tbl_link (c_id, url, title, description, category_id, display_order, on_homepage)
VALUES (".api_get_course_int_id().", '" . Database :: escape_string($url) . "','" . Database :: escape_string($title) . "','" . Database :: escape_string($description) . "','" . intval($cat) . "','" . (intval($max_order) + 1) . "','" . intval($on_homepage) . "')");
$id = Database :: insert_id();
$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;
}
$stats[import_link($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 {
$catlinkstatus = get_lang('CsvFileNotFound');
}
}
/**
* This function checks if the url is a vimeo link
* @author Julio Montoya
* @version 1.0
*/
function isVimeoLink($url)
{
$isLink = strrpos($url, "vimeo.com");
return $isLink;
}
function getVimeoLinkId($url)
{
$possibleUrls = array(
'http://www.vimeo.com/',
'http://vimeo.com/',
'https://www.vimeo.com/',
'https://vimeo.com/'
);
$url = str_replace($possibleUrls, '', $url);
if (is_numeric($url)) {
return $url;
}
return false;
}
/**
* This function checks if the url is a youtube link
* @author Jorge Frisancho
* @author Julio Montoya - Fixing code
* @version 1.0
*/
function is_youtube_link($url)
{
$is_youtube_link = strrpos($url, "youtube") || strrpos($url, "youtu.be");
return $is_youtube_link;
}
function get_youtube_video_id($url)
{
// This is the length of YouTube's video IDs
$len = 11;
// The ID string starts after "v=", which is usually right after
// "youtube.com/watch?" in the URL
$pos = strpos($url, "v=");
$id = '';
//If false try other options
if ($pos === false) {
$url_parsed = parse_url($url);
//Youtube shortener
//http://youtu.be/ID
$pos = strpos($url, "youtu.be");
if ($pos == false) {
$id = '';
} else {
return substr($url_parsed['path'], 1);
}
//if empty try the youtube.com/embed/ID
if (empty($id)) {
$pos = strpos($url, "embed");
if ($pos === false) {
return '';
} else {
return substr($url_parsed['path'], 7);
}
}
} else {
// Offset the start location to match the beginning of the ID string
$pos += 2;
// Get the ID string and return it
$id = substr($url, $pos, $len);
return $id;
}
}