mirror of
https://github.com/moodle/moodle.git
synced 2025-01-19 14:27:22 +01:00
122 lines
4.3 KiB
PHP
122 lines
4.3 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* This file is used to deliver a branch from the navigation structure
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* in XML format back to a page from an AJAX call
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*
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* @since 2.0
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* @package moodlecore
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* @copyright 2009 Sam Hemelryk
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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define('AJAX_SCRIPT', true);
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/** Include config */
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require_once(dirname(__FILE__) . '/../../config.php');
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/** Include course lib for its functions */
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require_once($CFG->dirroot.'/course/lib.php');
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try {
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// Start buffer capture so that we can `remove` any errors
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ob_start();
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// Require id This is the key for whatever branch we want to get
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$branchid = required_param('id', PARAM_INT);
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// This identifies the type of the branch we want to get
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$branchtype = required_param('type', PARAM_INT);
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// This identifies the block instance requesting AJAX extension
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$instanceid = optional_param('instance', null, PARAM_INT);
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$PAGE->set_context(get_context_instance(CONTEXT_SYSTEM));
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// Create a global nav object
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$navigation = new global_navigation_for_ajax($PAGE, $branchtype, $branchid);
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$linkcategories = false;
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if ($instanceid!==null) {
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// Get the db record for the block instance
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$blockrecord = $DB->get_record('block_instances', array('id'=>$instanceid,'blockname'=>'navigation'));
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if ($blockrecord!=false) {
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// Instantiate a block_instance object so we can access config
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$block = block_instance('navigation', $blockrecord);
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$trimmode = block_navigation::TRIM_RIGHT;
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$trimlength = 50;
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// Set the trim mode
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if (!empty($block->config->trimmode)) {
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$trimmode = (int)$block->config->trimmode;
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}
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// Set the trim length
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if (!empty($block->config->trimlength)) {
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$trimlength = (int)$block->config->trimlength;
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}
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if (!empty($block->config->linkcategories) && $block->config->linkcategories == 'yes') {
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$linkcategories = true;
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}
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}
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}
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// Create a navigation object to use, we can't guarantee PAGE will be complete
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if (!isloggedin()) {
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$navigation->set_expansion_limit(navigation_node::TYPE_COURSE);
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} else {
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if (isset($block) && !empty($block->config->expansionlimit)) {
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$navigation->set_expansion_limit($block->config->expansionlimit);
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}
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}
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if (isset($block)) {
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$block->trim($navigation, $trimmode, $trimlength, ceil($trimlength/2));
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}
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$converter = new navigation_json();
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// Find the actuall branch we are looking for
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$branch = $navigation->find($branchid, $branchtype);
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// Remove links to categories if required.
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if (!$linkcategories) {
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foreach ($branch->find_all_of_type(navigation_node::TYPE_CATEGORY) as $category) {
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$category->action = null;
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}
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}
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// Stop buffering errors at this point
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$html = ob_get_contents();
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ob_end_clean();
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} catch (Exception $e) {
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die('Error: '.$e->getMessage());
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}
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// Check if the buffer contianed anything if it did ERROR!
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if (trim($html) !== '') {
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die('Errors were encountered while producing the navigation branch'."\n\n\n".$html);
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}
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// Check that branch isn't empty... if it is ERROR!
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if (empty($branch) || $branch->nodetype !== navigation_node::NODETYPE_BRANCH) {
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die('No further information available for this branch');
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}
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// Prepare an XML converter for the branch
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$converter->set_expandable($navigation->get_expandable());
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// Set XML headers
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header('Content-type: text/plain; charset=utf-8');
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// Convert and output the branch as XML
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echo $converter->convert($branch);
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