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1 | <?php |
2 | /** |
3 | * Media-handling base classes and generic functionality. |
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 Media |
22 | */ |
23 | |
24 | use Psr\Log\LoggerInterface; |
25 | |
26 | /** |
27 | * Class to construct MediaHandler objects |
28 | * |
29 | * @since 1.28 |
30 | */ |
31 | class MediaHandlerFactory { |
32 | |
33 | /** |
34 | * Default, MediaWiki core media handlers |
35 | * |
36 | * @var array |
37 | */ |
38 | private const CORE_HANDLERS = [ |
39 | 'image/jpeg' => JpegHandler::class, |
40 | 'image/png' => PNGHandler::class, |
41 | 'image/gif' => GIFHandler::class, |
42 | 'image/tiff' => TiffHandler::class, |
43 | 'image/webp' => WebPHandler::class, |
44 | 'image/x-ms-bmp' => BmpHandler::class, |
45 | 'image/x-bmp' => BmpHandler::class, |
46 | 'image/x-xcf' => XCFHandler::class, |
47 | 'image/svg+xml' => SvgHandler::class, // official |
48 | 'image/svg' => SvgHandler::class, // compat |
49 | 'image/vnd.djvu' => DjVuHandler::class, // official |
50 | 'image/x.djvu' => DjVuHandler::class, // compat |
51 | 'image/x-djvu' => DjVuHandler::class, // compat |
52 | 'image/jp2' => Jpeg2000Handler::class, |
53 | 'image/jpx' => Jpeg2000Handler::class, |
54 | ]; |
55 | |
56 | /** @var LoggerInterface */ |
57 | private $logger; |
58 | |
59 | /** @var array */ |
60 | private $registry; |
61 | |
62 | /** |
63 | * Instance cache of MediaHandler objects by mimetype |
64 | * |
65 | * @var MediaHandler[] |
66 | */ |
67 | private $handlers; |
68 | |
69 | /** |
70 | * @param LoggerInterface $logger |
71 | * @param array $registry |
72 | */ |
73 | public function __construct( |
74 | LoggerInterface $logger, |
75 | array $registry |
76 | ) { |
77 | $this->logger = $logger; |
78 | $this->registry = $registry + self::CORE_HANDLERS; |
79 | } |
80 | |
81 | protected function getHandlerClass( $type ) { |
82 | return $this->registry[$type] ?? false; |
83 | } |
84 | |
85 | /** |
86 | * @param string $type mimetype |
87 | * @return MediaHandler|false |
88 | */ |
89 | public function getHandler( $type ) { |
90 | if ( isset( $this->handlers[$type] ) ) { |
91 | return $this->handlers[$type]; |
92 | } |
93 | |
94 | $class = $this->getHandlerClass( $type ); |
95 | if ( $class !== false ) { |
96 | /** @var MediaHandler $handler */ |
97 | $handler = new $class; |
98 | if ( !$handler->isEnabled() ) { |
99 | $this->logger->debug( |
100 | '{class} is not enabled.', |
101 | [ 'class' => $class ] |
102 | ); |
103 | $handler = false; |
104 | } |
105 | } else { |
106 | $this->logger->debug( |
107 | 'no handler found for {type}.', |
108 | [ 'type' => $type ] |
109 | ); |
110 | $handler = false; |
111 | } |
112 | |
113 | $this->handlers[$type] = $handler; |
114 | return $handler; |
115 | } |
116 | } |