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 ask and retrofit all the information from one
25 * mysql table present in the Moodle DB to one xmldb_table structure
26 *
27 * @package    tool_xmldb
28 * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
29 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
30 */
31class new_table_from_mysql extends XMLDBAction {
32
33    /**
34     * Init method, every subclass will have its own
35     */
36    function init() {
37        parent::init();
38
39        // Set own custom attributes
40
41        // Get needed strings
42        $this->loadStrings(array(
43            'createtable' => 'tool_xmldb',
44            'aftertable' => 'tool_xmldb',
45            'create' => 'tool_xmldb',
46            'back' => 'tool_xmldb'
47        ));
48    }
49
50    /**
51     * Invoke method, every class will have its own
52     * returns true/false on completion, setting both
53     * errormsg and output as necessary
54     */
55    function invoke() {
56        parent::invoke();
57
58        $result = true;
59
60        // Set own core attributes
61        $this->does_generate = ACTION_GENERATE_HTML;
62
63        // These are always here
64        global $CFG, $XMLDB, $DB, $OUTPUT;
65
66        // Do the job, setting result as needed
67        // Get the dir containing the file
68        $dirpath = required_param('dir', PARAM_PATH);
69        $dirpath = $CFG->dirroot . $dirpath;
70
71        // Get the correct dirs
72        if (!empty($XMLDB->dbdirs)) {
73            $dbdir = $XMLDB->dbdirs[$dirpath];
74        } else {
75            return false;
76        }
77        if (!empty($XMLDB->editeddirs)) {
78            $editeddir = $XMLDB->editeddirs[$dirpath];
79            $structure = $editeddir->xml_file->getStructure();
80        }
81
82        $tableparam = optional_param('table', NULL, PARAM_CLEAN);
83
84        // If no table, show form
85        if (!$tableparam) {
86            // No postaction here
87            $this->postaction = NULL;
88            // Get list of tables
89            $dbtables = $DB->get_tables();
90            $selecttables = array();
91            foreach ($dbtables as $dbtable) {
92                $i = $structure->findTableInArray($dbtable);
93                if ($i === NULL) {
94                    $selecttables[$dbtable] = $dbtable;
95                }
96            }
97            // Get list of after tables
98            $aftertables = array();
99            if ($tables = $structure->getTables()) {
100                foreach ($tables as $aftertable) {
101                    $aftertables[$aftertable->getName()] = $aftertable->getName();
102                }
103            }
104            if (!$selecttables) {
105                $this->errormsg = 'No tables available to be retrofitted';
106                return false;
107            }
108            // Now build the form
109            $o = '<form id="form" action="index.php" method="post">';
110            $o .= '<div>';
111            $o.= '    <input type="hidden" name ="dir" value="' . str_replace($CFG->dirroot, '', $dirpath) . '" />';
112            $o.= '    <input type="hidden" name ="action" value="new_table_from_mysql" />';
113            $o.= '    <input type="hidden" name ="postaction" value="edit_table" />';
114            $o.= '    <input type="hidden" name ="sesskey" value="' . sesskey() . '" />';
115            $o.= '    <table id="formelements" class="boxaligncenter" cellpadding="5">';
116            $o.= '      <tr><td><label for="menutable" accesskey="t">' . $this->str['createtable'] .' </label>' . html_writer::select($selecttables, 'table') . '<label for="menuafter" accesskey="a">' . $this->str['aftertable'] . ' </label>' .html_writer::select($aftertables, 'after') . '</td></tr>';
117            $o.= '      <tr><td colspan="2" align="center"><input type="submit" value="' .$this->str['create'] . '" /></td></tr>';
118            $o.= '      <tr><td colspan="2" align="center"><a href="index.php?action=edit_xml_file&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '">[' . $this->str['back'] . ']</a></td></tr>';
119            $o.= '    </table>';
120            $o.= '</div></form>';
121
122            $this->output = $o;
123
124
125        // If table, retrofit information and, if everything works,
126        // go to the table edit action
127        } else {
128            // Get some params (table is mandatory here)
129            $tableparam = required_param('table', PARAM_CLEAN);
130            $afterparam = required_param('after', PARAM_CLEAN);
131
132            // Create one new xmldb_table
133            $table = new xmldb_table(strtolower(trim($tableparam)));
134            $table->setComment($table->getName() . ' table retrofitted from MySQL');
135            // Get fields info from ADODb
136            $dbfields = $DB->get_columns($tableparam);
137            if ($dbfields) {
138                foreach ($dbfields as $dbfield) {
139                    // Create new XMLDB field
140                    $field = new xmldb_field($dbfield->name);
141                    // Set field with info retrofitted
142                    $field->setFromADOField($dbfield);
143                    // Add field to the table
144                    $table->addField($field);
145                }
146            }
147            // Get PK, UK and indexes info from ADODb
148            $dbindexes = $DB->get_indexes($tableparam);
149            if ($dbindexes) {
150                $lastkey = NULL; //To temp store the last key processed
151                foreach ($dbindexes as $indexname => $dbindex) {
152                    // Add the indexname to the array
153                    $dbindex['name'] = $indexname;
154                    // We are handling one xmldb_key (primaries + uniques)
155                    if ($dbindex['unique']) {
156                        $key = new xmldb_key(strtolower($dbindex['name']));
157                        // Set key with info retrofitted
158                        $key->setFromADOKey($dbindex);
159                        // Set default comment to PKs
160                        if ($key->getType() == XMLDB_KEY_PRIMARY) {
161                        }
162                        // Add key to the table
163                        $table->addKey($key);
164
165                    // We are handling one xmldb_index (non-uniques)
166                    } else {
167                        $index = new xmldb_index(strtolower($dbindex['name']));
168                        // Set index with info retrofitted
169                        $index->setFromADOIndex($dbindex);
170                        // Add index to the table
171                        $table->addIndex($index);
172                    }
173                }
174            }
175            // Finally, add the whole retroffited table to the structure
176            // in the place specified
177            $structure->addTable($table, $afterparam);
178        }
179
180        // Launch postaction if exists (leave this here!)
181        if ($this->getPostAction() && $result) {
182            return $this->launch($this->getPostAction());
183        }
184
185        // Return ok if arrived here
186        return $result;
187    }
188}
189
190