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1 | <?php |
2 | |
3 | /** |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by |
6 | * the Free Software Foundation; either version 2 of the License, or |
7 | * (at your option) any later version. |
8 | * |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | * GNU General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
17 | * http://www.gnu.org/copyleft/gpl.html |
18 | * |
19 | * @file |
20 | * @ingroup Content |
21 | * |
22 | * @author Art Baltai |
23 | */ |
24 | |
25 | namespace MediaWiki\Content; |
26 | |
27 | use InvalidArgumentException; |
28 | use MediaWiki\HookContainer\HookContainer; |
29 | use MediaWiki\HookContainer\HookRunner; |
30 | use MWUnknownContentModelException; |
31 | use Psr\Log\LoggerInterface; |
32 | use Wikimedia\ObjectFactory\ObjectFactory; |
33 | |
34 | /** |
35 | * Class ContentHandlerFactory |
36 | * @package MediaWiki\Content |
37 | * @ingroup Content |
38 | * @since 1.35 |
39 | */ |
40 | final class ContentHandlerFactory implements IContentHandlerFactory { |
41 | |
42 | /** |
43 | * @var string[]|callable[] |
44 | */ |
45 | private $handlerSpecs; |
46 | |
47 | /** |
48 | * @var ContentHandler[] Registry of ContentHandler instances by model id |
49 | */ |
50 | private $handlersByModel = []; |
51 | |
52 | /** @var ObjectFactory */ |
53 | private $objectFactory; |
54 | |
55 | /** @var HookRunner */ |
56 | private $hookRunner; |
57 | |
58 | /** @var LoggerInterface */ |
59 | private $logger; |
60 | |
61 | /** |
62 | * @since 1.35 |
63 | * @internal Use @see MediaWikiServices::getContentHandlerFactory |
64 | * |
65 | * @param string[]|callable[] $handlerSpecs An associative array mapping each known |
66 | * content model to the ObjectFactory spec used to construct its ContentHandler. |
67 | * This array typically comes from $wgContentHandlers. |
68 | * @param ObjectFactory $objectFactory |
69 | * @param HookContainer $hookContainer |
70 | * @param LoggerInterface $logger |
71 | */ |
72 | public function __construct( |
73 | array $handlerSpecs, |
74 | ObjectFactory $objectFactory, |
75 | HookContainer $hookContainer, |
76 | LoggerInterface $logger |
77 | ) { |
78 | $this->handlerSpecs = $handlerSpecs; |
79 | $this->objectFactory = $objectFactory; |
80 | $this->hookRunner = new HookRunner( $hookContainer ); |
81 | $this->logger = $logger; |
82 | } |
83 | |
84 | /** |
85 | * @param string $modelID |
86 | * |
87 | * @return ContentHandler |
88 | * @throws MWUnknownContentModelException If no handler is known for the model ID. |
89 | */ |
90 | public function getContentHandler( string $modelID ): ContentHandler { |
91 | if ( empty( $this->handlersByModel[$modelID] ) ) { |
92 | $contentHandler = $this->createForModelID( $modelID ); |
93 | |
94 | $this->logger->info( |
95 | "Registered handler for {$modelID}: " . get_class( $contentHandler ) |
96 | ); |
97 | $this->handlersByModel[$modelID] = $contentHandler; |
98 | } |
99 | |
100 | return $this->handlersByModel[$modelID]; |
101 | } |
102 | |
103 | /** |
104 | * Define HandlerSpec for ModelID. |
105 | * @param string $modelID |
106 | * @param callable|string $handlerSpec |
107 | * |
108 | * @internal |
109 | * |
110 | */ |
111 | public function defineContentHandler( string $modelID, $handlerSpec ): void { |
112 | if ( !is_callable( $handlerSpec ) && !is_string( $handlerSpec ) ) { |
113 | throw new InvalidArgumentException( |
114 | "ContentHandler Spec for modelID '{$modelID}' must be callable or class name" |
115 | ); |
116 | } |
117 | unset( $this->handlersByModel[$modelID] ); |
118 | $this->handlerSpecs[$modelID] = $handlerSpec; |
119 | } |
120 | |
121 | /** |
122 | * Get defined ModelIDs |
123 | * |
124 | * @return string[] |
125 | */ |
126 | public function getContentModels(): array { |
127 | $modelsFromHook = []; |
128 | $this->hookRunner->onGetContentModels( $modelsFromHook ); |
129 | $models = array_merge( // auto-registered from config and MediaWikiServices or manual |
130 | array_keys( $this->handlerSpecs ), |
131 | |
132 | // incorrect registered and called: without HOOK_NAME_GET_CONTENT_MODELS |
133 | array_keys( $this->handlersByModel ), |
134 | |
135 | // correct registered: as HOOK_NAME_GET_CONTENT_MODELS |
136 | $modelsFromHook ); |
137 | |
138 | return array_unique( $models ); |
139 | } |
140 | |
141 | /** |
142 | * @return string[] |
143 | */ |
144 | public function getAllContentFormats(): array { |
145 | $formats = []; |
146 | foreach ( $this->handlerSpecs as $model => $class ) { |
147 | $formats += array_fill_keys( |
148 | $this->getContentHandler( $model )->getSupportedFormats(), |
149 | true ); |
150 | } |
151 | |
152 | return array_keys( $formats ); |
153 | } |
154 | |
155 | /** |
156 | * @param string $modelID |
157 | * |
158 | * @return bool |
159 | */ |
160 | public function isDefinedModel( string $modelID ): bool { |
161 | return in_array( $modelID, $this->getContentModels(), true ); |
162 | } |
163 | |
164 | /** |
165 | * Create ContentHandler for ModelID |
166 | * |
167 | * @param string $modelID The ID of the content model for which to get a handler. |
168 | * Use CONTENT_MODEL_XXX constants. |
169 | * |
170 | * @return ContentHandler The ContentHandler singleton for handling the model given by the ID. |
171 | * |
172 | * @throws MWUnknownContentModelException If no handler is known for the model ID. |
173 | */ |
174 | private function createForModelID( string $modelID ): ContentHandler { |
175 | $handlerSpec = $this->handlerSpecs[$modelID] ?? null; |
176 | if ( $handlerSpec !== null ) { |
177 | return $this->createContentHandlerFromHandlerSpec( $modelID, $handlerSpec ); |
178 | } |
179 | |
180 | return $this->createContentHandlerFromHook( $modelID ); |
181 | } |
182 | |
183 | /** |
184 | * @param string $modelID |
185 | * @param ContentHandler $contentHandler |
186 | * |
187 | * @throws MWUnknownContentModelException |
188 | */ |
189 | private function validateContentHandler( string $modelID, $contentHandler ): void { |
190 | if ( $contentHandler === null ) { |
191 | throw new MWUnknownContentModelException( $modelID ); |
192 | } |
193 | |
194 | if ( !is_object( $contentHandler ) ) { |
195 | throw new InvalidArgumentException( |
196 | "ContentHandler for model {$modelID} wrong: non-object given." |
197 | ); |
198 | } |
199 | |
200 | if ( !$contentHandler instanceof ContentHandler ) { |
201 | throw new InvalidArgumentException( |
202 | "ContentHandler for model {$modelID} must supply a ContentHandler instance, " |
203 | . get_class( $contentHandler ) . ' given.' |
204 | ); |
205 | } |
206 | } |
207 | |
208 | /** |
209 | * @param string $modelID |
210 | * @param callable|string $handlerSpec |
211 | * |
212 | * @return ContentHandler |
213 | * @throws MWUnknownContentModelException |
214 | */ |
215 | private function createContentHandlerFromHandlerSpec( |
216 | string $modelID, $handlerSpec |
217 | ): ContentHandler { |
218 | /** |
219 | * @var ContentHandler $contentHandler |
220 | */ |
221 | $contentHandler = $this->objectFactory->createObject( |
222 | $handlerSpec, |
223 | [ |
224 | 'assertClass' => ContentHandler::class, |
225 | 'allowCallable' => true, |
226 | 'allowClassName' => true, |
227 | 'extraArgs' => [ $modelID ], |
228 | ] |
229 | ); |
230 | |
231 | $this->validateContentHandler( $modelID, $contentHandler ); |
232 | |
233 | return $contentHandler; |
234 | } |
235 | |
236 | /** |
237 | * @param string $modelID |
238 | * |
239 | * @return ContentHandler |
240 | * @throws MWUnknownContentModelException |
241 | */ |
242 | private function createContentHandlerFromHook( string $modelID ): ContentHandler { |
243 | $contentHandler = null; |
244 | // @phan-suppress-next-line PhanTypeMismatchArgument Type mismatch on pass-by-ref args |
245 | $this->hookRunner->onContentHandlerForModelID( $modelID, $contentHandler ); |
246 | $this->validateContentHandler( $modelID, $contentHandler ); |
247 | |
248 | '@phan-var ContentHandler $contentHandler'; |
249 | |
250 | return $contentHandler; |
251 | } |
252 | } |