Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle 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 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Provide interface for blocks AJAX actions

 *

 * @copyright  2011 Lancaster University Network Services Limited

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 * @package core

 */

define('AJAX_SCRIPT', true);

require_once(__DIR__ . '/../../config.php');

// Initialise ALL common incoming parameters here, up front.

$pagehash = required_param('pagehash', PARAM_RAW);

$action = optional_param('action', '', PARAM_ALPHA);

// Params for blocks-move actions.

$buimoveid = optional_param('bui_moveid', 0, PARAM_INT);

$buinewregion = optional_param('bui_newregion', '', PARAM_ALPHAEXT);

$buibeforeid = optional_param('bui_beforeid', 0, PARAM_INT);

$PAGE->set_url('/lib/ajax/blocks.php', ['pagehash' => $pagehash]);

// Retrieve the edited page from the session hash.

$page = moodle_page::retrieve_edited_page($pagehash, MUST_EXIST);

// Verifying login and session.

$cm = null;

if (!is_null($page->cm)) {

    $cm = get_coursemodule_from_id(null, $page->cm->id, $page->course->id, false, MUST_EXIST);

}

require_login($page->course, false, $cm);

require_sesskey();

$PAGE->set_context($page->context);

if (!$page->user_can_edit_blocks() || !$page->user_is_editing()) {

    throw new moodle_exception('nopermissions', '', $page->url->out(), get_string('editblock'));

}

// Send headers.

echo $OUTPUT->header();

switch ($action) {

    case 'move':

        // Loading blocks and instances for the region.

        $page->blocks->load_blocks();

        $instances = $page->blocks->get_blocks_for_region($buinewregion);

        $buinewweight = null;

        if ($buibeforeid == 0) {

            if (count($instances) === 0) {

                // Moving the block into an empty region. Give it the default weight.

                $buinewweight = 0;

            } else {

                // Moving to very bottom.

                $last = end($instances);

                $buinewweight = $last->instance->weight + 1;

            }

        } else {

            // Moving somewhere.

            $lastweight = 0;

            $lastblock = 0;

            $first = reset($instances);

            if ($first) {

                $lastweight = $first->instance->weight - 2;

            }

            foreach ($instances as $instance) {

                if ($instance->instance->id == $buibeforeid) {

                    // Location found, just calculate weight like in block_manager->create_block_contents() and quit the loop.

                    if ($lastblock == $buimoveid) {

                        // Same block, same place - nothing to move.

                        break;

                    }

                    $buinewweight = ($lastweight + $instance->instance->weight) / 2;

                    break;

                }

                $lastweight = $instance->instance->weight;

                $lastblock = $instance->instance->id;

            }

        }

        // Move block if we need.

        if (isset($buinewweight)) {

            // Nasty hack.

            $_POST['bui_newweight'] = $buinewweight;

            $page->blocks->process_url_move();

        }

        break;

}