xref: /plugin/sqlite/helper/db.php (revision 3028f88622b500f7bb7733e65a39e4ff1ae5ea42) 
1<?php
2
3/**
4 * DokuWiki Plugin sqlite (Helper 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
10
11class helper_plugin_sqlite_db extends DokuWiki_Plugin
12{
13    /** @var helper_plugin_sqlite */
14    protected $sqlite;
15
16    /**
17     * helper_plugin_struct_db constructor.
18     */
19    public function __construct()
20    {
21        $this->init();
22    }
23
24    /**
25     * Initialize the database
26     *
27     * @throws Exception
28     */
29    protected function init()
30    {
31        /** @var helper_plugin_sqlite $sqlite */
32        $this->sqlite = plugin_load('helper', 'sqlite');
33        if (!$this->sqlite) {
34            if (defined('DOKU_UNITTEST')) throw new \Exception('Couldn\'t load sqlite.');
35            return;
36        }
37
38        if ($this->sqlite->getAdapter() === null) {
39            if (defined('DOKU_UNITTEST')) throw new \Exception('Couldn\'t load PDO sqlite.');
40            $this->sqlite = null;
41            return;
42        }
43
44        if ($this->sqlite->getAdapter()->getName() != DOKU_EXT_PDO) {
45            if (defined('DOKU_UNITTEST')) throw new \Exception('Couldn\'t load PDO sqlite.');
46            $this->sqlite = null;
47            return;
48        }
49        $this->sqlite->getAdapter()->setUseNativeAlter(true);
50
51        // initialize the database connection
52        if (!$this->sqlite->init('sqlite', DOKU_PLUGIN . 'sqlite/db/')) {
53            if (defined('DOKU_UNITTEST')) throw new \Exception('Couldn\'t init sqlite.');
54            $this->sqlite = null;
55            return;
56        }
57    }
58
59    /**
60     * @param bool $throw throw an Exception when sqlite not available?
61     * @return helper_plugin_sqlite|null
62     */
63    public function getDB($throw = true)
64    {
65        global $conf;
66        $len = strlen($conf['metadir']);
67        if ($this->sqlite && $conf['metadir'] != substr($this->sqlite->getAdapter()->getDbFile(), 0, $len)) {
68            $this->init();
69        }
70        if (!$this->sqlite && $throw) {
71            throw new \RuntimeException('no sqlite');
72        }
73        return $this->sqlite;
74    }
75
76    /**
77     * Completely remove the database and reinitialize it
78     *
79     * You do not want to call this except for testing!
80     */
81    public function resetDB()
82    {
83        if (!$this->sqlite) return;
84        $file = $this->sqlite->getAdapter()->getDbFile();
85        if (!$file) return;
86        unlink($file);
87        clearstatcache(true, $file);
88        $this->init();
89    }
90}
91
92// vim:ts=4:sw=4:et:
93