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1<?php
2/**
3 * A foreign repository with an accessible MediaWiki database.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
19 *
20 * @file
21 * @ingroup FileRepo
22 */
23
24use MediaWiki\MediaWikiServices;
25use MediaWiki\Storage\BlobStore;
26use Wikimedia\Rdbms\DatabaseDomain;
27use Wikimedia\Rdbms\IDatabase;
28
29/**
30 * A foreign repository with an accessible MediaWiki database
31 *
32 * @ingroup FileRepo
33 */
34class ForeignDBRepo extends LocalRepo implements IForeignRepoWithDB {
35    /** @var string */
36    protected $dbType;
37
38    /** @var string */
39    protected $dbServer;
40
41    /** @var string */
42    protected $dbUser;
43
44    /** @var string */
45    protected $dbPassword;
46
47    /** @var string */
48    protected $dbName;
49
50    /** @var string */
51    protected $dbFlags;
52
53    /** @var string */
54    protected $tablePrefix;
55
56    /** @var IDatabase */
57    protected $dbConn;
58
59    /** @var callable */
60    protected $fileFactory = [ ForeignDBFile::class, 'newFromTitle' ];
61    /** @var callable */
62    protected $fileFromRowFactory = [ ForeignDBFile::class, 'newFromRow' ];
63
64    /**
65     * @param array|null $info
66     */
67    public function __construct( $info ) {
68        parent::__construct( $info );
69
70        '@phan-var array $info';
71        $this->dbType = $info['dbType'];
72        $this->dbServer = $info['dbServer'];
73        $this->dbUser = $info['dbUser'];
74        $this->dbPassword = $info['dbPassword'];
75        $this->dbName = $info['dbName'];
76        $this->dbFlags = $info['dbFlags'];
77        $this->tablePrefix = $info['tablePrefix'];
78        $this->hasAccessibleSharedCache = $info['hasSharedCache'];
79
80        $dbDomain = new DatabaseDomain( $this->dbName, null, $this->tablePrefix );
81        $this->dbDomain = $dbDomain->getId();
82    }
83
84    public function getPrimaryDB() {
85        if ( !$this->dbConn ) {
86            $func = $this->getDBFactory();
87            $this->dbConn = $func( DB_PRIMARY );
88        }
89
90        return $this->dbConn;
91    }
92
93    public function getReplicaDB() {
94        return $this->getPrimaryDB();
95    }
96
97    /**
98     * @return Closure
99     */
100    protected function getDBFactory() {
101        $type = $this->dbType;
102        $params = [
103            'host' => $this->dbServer,
104            'user' => $this->dbUser,
105            'password' => $this->dbPassword,
106            'dbname' => $this->dbName,
107            'flags' => $this->dbFlags,
108            'tablePrefix' => $this->tablePrefix
109        ];
110
111        return static function ( $index ) use ( $type, $params ) {
112            $factory = MediaWikiServices::getInstance()->getDatabaseFactory();
113            return $factory->create( $type, $params );
114        };
115    }
116
117    /**
118     * @return never
119     */
120    protected function assertWritableRepo() {
121        throw new LogicException( static::class . ': write operations are not supported.' );
122    }
123
124    public function getBlobStore(): ?BlobStore {
125        return null;
126    }
127}