source: moodle/trunk/fuentes/admin/tool/xmldb/actions/move_updown_index/move_updown_index.class.php @ 136

Last change on this file since 136 was 136, checked in by mabarracus, 4 years ago

Ported code to xenial

File size: 4.6 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 * @package    tool_xmldb
19 * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
20 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
21 */
22
23/**
24 * This class will will move one index up/down
25 *
26 * @package    tool_xmldb
27 * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
28 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
29 */
30class move_updown_index extends XMLDBAction {
31
32    /**
33     * Init method, every subclass will have its own
34     */
35    function init() {
36        parent::init();
37
38        // Set own custom attributes
39
40        // Get needed strings
41        $this->loadStrings(array(
42            // 'key' => 'module',
43        ));
44    }
45
46    /**
47     * Invoke method, every class will have its own
48     * returns true/false on completion, setting both
49     * errormsg and output as necessary
50     */
51    function invoke() {
52        parent::invoke();
53
54        $result = true;
55
56        // Set own core attributes
57        $this->does_generate = ACTION_NONE;
58        //$this->does_generate = ACTION_GENERATE_HTML;
59
60        // These are always here
61        global $CFG, $XMLDB;
62
63        // Do the job, setting result as needed
64        // Get the dir containing the file
65        $dirpath = required_param('dir', PARAM_PATH);
66        $dirpath = $CFG->dirroot . $dirpath;
67
68        // Get the correct dirs
69        if (!empty($XMLDB->dbdirs)) {
70            $dbdir = $XMLDB->dbdirs[$dirpath];
71        } else {
72            return false;
73        }
74        if (!empty($XMLDB->editeddirs)) {
75            $editeddir = $XMLDB->editeddirs[$dirpath];
76            $structure = $editeddir->xml_file->getStructure();
77        }
78
79        $prev = NULL;
80        $next = NULL;
81        $tableparam = required_param('table', PARAM_CLEAN);
82        $indexparam = required_param('index', PARAM_CLEAN);
83        $direction  = required_param('direction', PARAM_ALPHA);
84        $tables = $structure->getTables();
85        $table = $structure->getTable($tableparam);
86        $indexes = $table->getIndexes();
87        if ($direction == 'down') {
88            $index = $table->getIndex($indexparam);
89            $swap  = $table->getIndex($index->getNext());
90        } else {
91            $swap  = $table->getIndex($indexparam);
92            $index = $table->getIndex($swap->getPrevious());
93        }
94
95        // Change the index before the pair
96        if ($index->getPrevious()) {
97            $prev = $table->getIndex($index->getPrevious());
98            $prev->setNext($swap->getName());
99            $swap->setPrevious($prev->getName());
100            $prev->setChanged(true);
101        } else {
102            $swap->setPrevious(NULL);
103        }
104        // Change the field after the pair
105        if ($swap->getNext()) {
106            $next = $table->getIndex($swap->getNext());
107            $next->setPrevious($index->getName());
108            $index->setNext($next->getName());
109            $next->setChanged(true);
110        } else {
111            $index->setNext(NULL);
112        }
113        // Swap the indexes
114        $index->setPrevious($swap->getName());
115        $swap->setNext($index->getName());
116
117        // Mark indexes as changed
118        $index->setChanged(true);
119        $swap->setChanged(true);
120
121        // Table has changed
122        $table->setChanged(true);
123
124        // Reorder the indexes
125        $table->orderIndexes();
126
127        // Recalculate the hash
128        $structure->calculateHash(true);
129
130        // If the hash has changed from the original one, change the version
131        // and mark the structure as changed
132        $origstructure = $dbdir->xml_file->getStructure();
133        if ($structure->getHash() != $origstructure->getHash()) {
134            $structure->setVersion(userdate(time(), '%Y%m%d', 99, false));
135            $structure->setChanged(true);
136        }
137
138        // Launch postaction if exists (leave this here!)
139        if ($this->getPostAction() && $result) {
140            return $this->launch($this->getPostAction());
141        }
142
143        // Return ok if arrived here
144        return $result;
145    }
146}
147
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