1<?php
2
3/**
4 * DokuWiki Plugin struct (Action Component)
5 *
6 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
7 * @author  Andreas Gohr, Michael Große <dokuwiki@cosmocode.de>
8 */
9
10use dokuwiki\plugin\struct\meta\Schema;
11use dokuwiki\plugin\struct\meta\StructException;
12
13class action_plugin_struct_ajax extends DokuWiki_Action_Plugin
14{
15    /**
16     * Registers a callback function for a given event
17     *
18     * @param Doku_Event_Handler $controller DokuWiki's event controller object
19     * @return void
20     */
21    public function register(Doku_Event_Handler $controller)
22    {
23        $controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handleAjax');
24    }
25
26    /**
27     * Pass Ajax call to a type
28     *
29     * @param Doku_Event $event event object by reference
30     */
31    public function handleAjax(Doku_Event $event)
32    {
33        if ($event->data != 'plugin_struct') return;
34        $event->preventDefault();
35        $event->stopPropagation();
36        global $conf;
37
38        header('Content-Type: application/json');
39        try {
40            $result = $this->executeTypeAjax();
41        } catch (StructException $e) {
42            $result = array(
43                'error' => $e->getMessage() . ' ' . basename($e->getFile()) . ':' . $e->getLine()
44            );
45            if ($conf['allowdebug']) {
46                $result['stacktrace'] = $e->getTraceAsString();
47            }
48            http_status(500);
49        }
50
51        echo json_encode($result);
52    }
53
54    /**
55     * Check the input variables and run the AJAX call
56     *
57     * @return mixed
58     * @throws StructException
59     */
60    protected function executeTypeAjax()
61    {
62        global $INPUT;
63
64        $col = $INPUT->str('column');
65        if (blank($col)) throw new StructException('No column provided');
66        list($schema, $colname) = explode('.', $col, 2);
67        if (blank($schema) || blank($colname)) throw new StructException('Column format is wrong');
68
69        $schema = new Schema($schema);
70        if (!$schema->getId()) throw new StructException('Unknown Schema');
71
72        $column = $schema->findColumn($colname);
73        if ($column === false) throw new StructException('Column not found');
74
75        return $column->getType()->handleAjax();
76    }
77}
78