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6b081d2e9f
Introduce 'pagehash' - an identifier that uniquely identifies a page for the user session
105 lines
3.7 KiB
PHP
105 lines
3.7 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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* Provide interface for blocks AJAX actions
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*
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* @copyright 2011 Lancaster University Network Services Limited
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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* @package core
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*/
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define('AJAX_SCRIPT', true);
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require_once(__DIR__ . '/../../config.php');
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// Initialise ALL common incoming parameters here, up front.
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$pagehash = required_param('pagehash', PARAM_RAW);
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$action = optional_param('action', '', PARAM_ALPHA);
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// Params for blocks-move actions.
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$buimoveid = optional_param('bui_moveid', 0, PARAM_INT);
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$buinewregion = optional_param('bui_newregion', '', PARAM_ALPHAEXT);
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$buibeforeid = optional_param('bui_beforeid', 0, PARAM_INT);
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$PAGE->set_url('/lib/ajax/blocks.php', ['pagehash' => $pagehash]);
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// Retrieve the edited page from the session hash.
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$page = moodle_page::retrieve_edited_page($pagehash, MUST_EXIST);
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// Verifying login and session.
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$cm = null;
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if (!is_null($page->cm)) {
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$cm = get_coursemodule_from_id(null, $page->cm->id, $page->course->id, false, MUST_EXIST);
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}
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require_login($page->course, false, $cm);
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require_sesskey();
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$PAGE->set_context($page->context);
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if (!$page->user_can_edit_blocks() || !$page->user_is_editing()) {
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throw new moodle_exception('nopermissions', '', $page->url->out(), get_string('editblock'));
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}
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// Send headers.
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echo $OUTPUT->header();
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switch ($action) {
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case 'move':
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// Loading blocks and instances for the region.
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$page->blocks->load_blocks();
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$instances = $page->blocks->get_blocks_for_region($buinewregion);
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$buinewweight = null;
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if ($buibeforeid == 0) {
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if (count($instances) === 0) {
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// Moving the block into an empty region. Give it the default weight.
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$buinewweight = 0;
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} else {
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// Moving to very bottom.
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$last = end($instances);
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$buinewweight = $last->instance->weight + 1;
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}
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} else {
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// Moving somewhere.
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$lastweight = 0;
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$lastblock = 0;
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$first = reset($instances);
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if ($first) {
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$lastweight = $first->instance->weight - 2;
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}
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foreach ($instances as $instance) {
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if ($instance->instance->id == $buibeforeid) {
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// Location found, just calculate weight like in block_manager->create_block_contents() and quit the loop.
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if ($lastblock == $buimoveid) {
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// Same block, same place - nothing to move.
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break;
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}
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$buinewweight = ($lastweight + $instance->instance->weight) / 2;
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break;
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}
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$lastweight = $instance->instance->weight;
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$lastblock = $instance->instance->id;
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}
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}
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// Move block if we need.
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if (isset($buinewweight)) {
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// Nasty hack.
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$_POST['bui_newweight'] = $buinewweight;
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$page->blocks->process_url_move();
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}
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break;
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}
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