source: moodle/trunk/fuentes/admin/tool/xmldb/actions/move_updown_table/move_updown_table.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: 4.4 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 table 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_table 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        $direction  = required_param('direction', PARAM_ALPHA);
83        $tables = $structure->getTables();
84        if ($direction == 'down') {
85            $table = $structure->getTable($tableparam);
86            $swap  = $structure->getTable($table->getNext());
87        } else {
88            $swap  = $structure->getTable($tableparam);
89            $table = $structure->getTable($swap->getPrevious());
90        }
91
92        // Change the table before the pair
93        if ($table->getPrevious()) {
94            $prev = $structure->getTable($table->getPrevious());
95            $prev->setNext($swap->getName());
96            $swap->setPrevious($prev->getName());
97            $prev->setChanged(true);
98        } else {
99            $swap->setPrevious(NULL);
100        }
101        // Change the table after the pair
102        if ($swap->getNext()) {
103            $next = $structure->getTable($swap->getNext());
104            $next->setPrevious($table->getName());
105            $table->setNext($next->getName());
106            $next->setChanged(true);
107        } else {
108            $table->setNext(NULL);
109        }
110        // Swap the tables
111        $table->setPrevious($swap->getName());
112        $swap->setNext($table->getName());
113
114        // Table has changed
115        $table->setChanged(true);
116
117        // Reorder the structure
118        $structure->orderTables();
119
120        // Recalculate the hash
121        $structure->calculateHash(true);
122
123        // If the hash has changed from the original one, change the version
124        // and mark the structure as changed
125        $origstructure = $dbdir->xml_file->getStructure();
126        if ($structure->getHash() != $origstructure->getHash()) {
127            $structure->setVersion(userdate(time(), '%Y%m%d', 99, false));
128            $structure->setChanged(true);
129        }
130
131        // Launch postaction if exists (leave this here!)
132        if ($this->getPostAction() && $result) {
133            return $this->launch($this->getPostAction());
134        }
135
136        // Return ok if arrived here
137        return $result;
138    }
139}
140
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