source: moodle/trunk/fuentes/lib/ajax/blocks.php @ 1331

Last change on this file since 1331 was 1331, checked in by jrpelegrina, 3 years ago

Updated to moodle 3.0.3

File size: 4.7 KB
Line 
1<?php
2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
16
17/**
18 * Provide interface for blocks AJAX actions
19 *
20 * @copyright  2011 Lancaster University Network Services Limited
21 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
22 * @package core
23 */
24
25define('AJAX_SCRIPT', true);
26require_once(dirname(__FILE__) . '/../../config.php');
27
28// Initialise ALL common incoming parameters here, up front.
29$courseid = required_param('courseid', PARAM_INT);
30$pagelayout = required_param('pagelayout', PARAM_ALPHAEXT);
31$pagetype = required_param('pagetype', PARAM_ALPHANUMEXT);
32$contextid = required_param('contextid', PARAM_INT);
33$subpage = optional_param('subpage', '', PARAM_ALPHANUMEXT);
34$cmid = optional_param('cmid', null, PARAM_INT);
35$action = optional_param('action', '', PARAM_ALPHA);
36// Params for blocks-move actions.
37$buimoveid = optional_param('bui_moveid', 0, PARAM_INT);
38$buinewregion = optional_param('bui_newregion', '', PARAM_ALPHAEXT);
39$buibeforeid = optional_param('bui_beforeid', 0, PARAM_INT);
40
41// Setting pagetype and URL.
42$PAGE->set_pagetype($pagetype);
43$PAGE->set_url('/lib/ajax/blocks.php', array('courseid' => $courseid, 'pagelayout' => $pagelayout, 'pagetype' => $pagetype));
44
45// Verifying login and session.
46$cm = null;
47if (!is_null($cmid)) {
48    $cm = get_coursemodule_from_id(null, $cmid, $courseid, false, MUST_EXIST);
49}
50require_login($courseid, false, $cm);
51require_sesskey();
52
53// Set context from ID, so we don't have to guess it from other info.
54$PAGE->set_context(context::instance_by_id($contextid));
55
56// Setting layout to replicate blocks configuration for the page we edit.
57$PAGE->set_pagelayout($pagelayout);
58$PAGE->set_subpage($subpage);
59$PAGE->blocks->add_custom_regions_for_pagetype($pagetype);
60$pagetype = explode('-', $pagetype);
61switch ($pagetype[0]) {
62    case 'my':
63        $PAGE->set_blocks_editing_capability('moodle/my:manageblocks');
64        break;
65    case 'user':
66        if ($pagetype[1] === 'profile' && $PAGE->context->contextlevel == CONTEXT_USER
67                && $PAGE->context->instanceid == $USER->id) {
68            // A user can only move blocks on their own site profile.
69            $PAGE->set_blocks_editing_capability('moodle/user:manageownblocks');
70        } else {
71            $PAGE->set_blocks_editing_capability('moodle/user:manageblocks');
72        }
73        break;
74}
75
76// Send headers.
77echo $OUTPUT->header();
78
79switch ($action) {
80    case 'move':
81        // Loading blocks and instances for the region.
82        $PAGE->blocks->load_blocks();
83        $instances = $PAGE->blocks->get_blocks_for_region($buinewregion);
84
85        $buinewweight = null;
86        if ($buibeforeid == 0) {
87            if (count($instances) === 0) {
88                // Moving the block into an empty region. Give it the default weight.
89                $buinewweight = 0;
90            } else {
91                // Moving to very bottom.
92                $last = end($instances);
93                $buinewweight = $last->instance->weight + 1;
94            }
95        } else {
96            // Moving somewhere.
97            $lastweight = 0;
98            $lastblock = 0;
99            $first = reset($instances);
100            if ($first) {
101                $lastweight = $first->instance->weight - 2;
102            }
103
104            foreach ($instances as $instance) {
105                if ($instance->instance->id == $buibeforeid) {
106                    // Location found, just calculate weight like in block_manager->create_block_contents() and quit the loop.
107                    if ($lastblock == $buimoveid) {
108                        // Same block, same place - nothing to move.
109                        break;
110                    }
111                    $buinewweight = ($lastweight + $instance->instance->weight) / 2;
112                    break;
113                }
114                $lastweight = $instance->instance->weight;
115                $lastblock = $instance->instance->id;
116            }
117        }
118
119        // Move block if we need.
120        if (isset($buinewweight)) {
121            // Nasty hack.
122            $_POST['bui_newweight'] = $buinewweight;
123            $PAGE->blocks->process_url_move();
124        }
125        break;
126}
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