xref: /plugin/struct/action/ajax.php (revision dfe3ae67e2cbc66413b67e0194e82ef51f46af29) 
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    /**
17     * Registers a callback function for a given event
18     *
19     * @param Doku_Event_Handler $controller DokuWiki's event controller object
20     * @return void
21     */
22    public function register(Doku_Event_Handler $controller)
23    {
24        $controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handleAjax');
25    }
26
27    /**
28     * Pass Ajax call to a type
29     *
30     * @param Doku_Event $event event object by reference
31     * @param mixed $param [the parameters passed as fifth argument to register_hook() when this
32     *                           handler was registered]
33     */
34    public function handleAjax(Doku_Event $event, $param)
35    {
36        if ($event->data != 'plugin_struct') return;
37        $event->preventDefault();
38        $event->stopPropagation();
39        global $conf;
40
41        header('Content-Type: application/json');
42        try {
43            $result = $this->executeTypeAjax();
44        } catch (StructException $e) {
45            $result = array(
46                'error' => $e->getMessage() . ' ' . basename($e->getFile()) . ':' . $e->getLine()
47            );
48            if ($conf['allowdebug']) {
49                $result['stacktrace'] = $e->getTraceAsString();
50            }
51            http_status(500);
52        }
53
54        $json = new JSON();
55        echo $json->encode($result);
56    }
57
58    /**
59     * Check the input variables and run the AJAX call
60     *
61     * @throws StructException
62     * @return mixed
63     */
64    protected function executeTypeAjax()
65    {
66        global $INPUT;
67
68        $col = $INPUT->str('column');
69        if (blank($col)) throw new StructException('No column provided');
70        list($schema, $colname) = explode('.', $col, 2);
71        if (blank($schema) || blank($colname)) throw new StructException('Column format is wrong');
72
73        $schema = new Schema($schema);
74        if (!$schema->getId()) throw new StructException('Unknown Schema');
75
76        $column = $schema->findColumn($colname);
77        if ($column === false) throw new StructException('Column not found');
78
79        return $column->getType()->handleAjax();
80    }
81}
82