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     * @param mixed $param [the parameters passed as fifth argument to register_hook() when this
31     *                           handler was registered]
32     */
33    public function handleAjax(Doku_Event $event, $param)
34    {
35        if ($event->data != 'plugin_struct') return;
36        $event->preventDefault();
37        $event->stopPropagation();
38        global $conf;
39
40        header('Content-Type: application/json');
41        try {
42            $result = $this->executeTypeAjax();
43        } catch (StructException $e) {
44            $result = array(
45                'error' => $e->getMessage() . ' ' . basename($e->getFile()) . ':' . $e->getLine()
46            );
47            if ($conf['allowdebug']) {
48                $result['stacktrace'] = $e->getTraceAsString();
49            }
50            http_status(500);
51        }
52
53        $json = new JSON();
54        echo $json->encode($result);
55    }
56
57    /**
58     * Check the input variables and run the AJAX call
59     *
60     * @return mixed
61     * @throws StructException
62     */
63    protected function executeTypeAjax()
64    {
65        global $INPUT;
66
67        $col = $INPUT->str('column');
68        if (blank($col)) throw new StructException('No column provided');
69        list($schema, $colname) = explode('.', $col, 2);
70        if (blank($schema) || blank($colname)) throw new StructException('Column format is wrong');
71
72        $schema = new Schema($schema);
73        if (!$schema->getId()) throw new StructException('Unknown Schema');
74
75        $column = $schema->findColumn($colname);
76        if ($column === false) throw new StructException('Column not found');
77
78        return $column->getType()->handleAjax();
79    }
80}
81