Complex classes like FileProvider often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use FileProvider, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 11 | class FileProvider extends AbstractProvider implements ProviderInterface, DownloadableProviderInterface  | 
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| 12 | { | 
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| 13 | /**  | 
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| 14 | * @var array  | 
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| 15 | */  | 
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| 16 | private $fileConstraintOptions = [];  | 
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| 17 | |||
| 18 | /**  | 
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| 19 | * @param array $fileConstraintOptions  | 
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| 20 | */  | 
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| 21 | 15 | public function __construct(array $fileConstraintOptions = [])  | 
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| 25 | |||
| 26 | /**  | 
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| 27 | * @param FormMapper $formMapper  | 
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| 28 | */  | 
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| 29 | 4 | public function buildProviderCreateForm(FormMapper $formMapper)  | 
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| 33 | |||
| 34 | /**  | 
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| 35 | * @param FormMapper $formMapper  | 
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| 36 | */  | 
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| 37 | 2 | public function buildProviderEditFormBefore(FormMapper $formMapper)  | 
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| 41 | |||
| 42 | /**  | 
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| 43 | * @param AbstractMedia $media  | 
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| 44 | * @param bool $providerReferenceUpdated  | 
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| 45 | */  | 
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| 46 | 2 | public function update(AbstractMedia $media, $providerReferenceUpdated)  | 
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| 60 | |||
| 61 | /**  | 
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| 62 | * @return string  | 
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| 63 | */  | 
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| 64 | 12 | public function getIcon(): string  | 
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| 68 | |||
| 69 | /**  | 
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| 70 | * @return string  | 
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| 71 | */  | 
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| 72 | 13 | public function getName(): string  | 
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| 76 | |||
| 77 | /**  | 
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| 78 | * @return string  | 
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| 79 | */  | 
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| 80 | 4 | public function getType(): string  | 
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| 84 | |||
| 85 | /**  | 
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| 86 | * @param AbstractMedia $media  | 
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| 87 | */  | 
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| 88 | 2 | protected function setFileImage(AbstractMedia $media)  | 
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| 106 | |||
| 107 | /**  | 
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| 108 | * @param FormMapper $formMapper  | 
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| 109 | * @param string $name  | 
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| 110 | * @param string $label  | 
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| 111 | * @param array $options  | 
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| 112 | */  | 
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| 113 | 2 | public function addFileField(FormMapper $formMapper, $name, $label, $options = [])  | 
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| 117 | |||
| 118 | /**  | 
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| 119 | * @param FormMapper $formMapper  | 
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| 120 | * @param string $name  | 
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| 121 | * @param string $label  | 
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| 122 | * @param array $options  | 
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| 123 | */  | 
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| 124 | 4 | public function addRequiredFileField(FormMapper $formMapper, $name, $label, $options = [])  | 
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| 128 | |||
| 129 | /**  | 
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| 130 | * @param array $options  | 
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| 131 | * @return array  | 
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| 132 | */  | 
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| 133 | 4 | private function getFileFieldConstraints(array $options): array  | 
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| 140 | |||
| 141 | /**  | 
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| 142 | * @param array $options  | 
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| 143 | * @return array  | 
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| 144 | */  | 
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| 145 | 4 | protected function getFileConstraintOptions(array $options = []): array  | 
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| 152 | |||
| 153 | /**  | 
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| 154 | * @param $object  | 
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| 155 | * @param ExecutionContextInterface $context  | 
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| 156 | */  | 
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| 157 | 4 | public function validateExtension($object, ExecutionContextInterface $context)  | 
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| 170 | |||
| 171 | /**  | 
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| 172 | * @param $extension  | 
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| 173 | * @return string  | 
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| 174 | */  | 
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| 175 | 3 | protected function getImageByExtension($extension): string  | 
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| 210 | |||
| 211 | /**  | 
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| 212 | * @return string[]  | 
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| 213 | */  | 
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| 214 | 3 | protected function getArchiveExtensions(): array  | 
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| 218 | |||
| 219 | /**  | 
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| 220 | * @return string[]  | 
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| 221 | */  | 
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| 222 | 3 | protected function getAudioExtensions(): array  | 
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| 226 | |||
| 227 | /**  | 
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| 228 | * @return string[]  | 
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| 229 | */  | 
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| 230 | 3 | protected function getCodeExtensions(): array  | 
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| 234 | |||
| 235 | /**  | 
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| 236 | * @return string[]  | 
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| 237 | */  | 
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| 238 | 3 | protected function getSpreadsheetExtensions(): array  | 
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| 242 | |||
| 243 | /**  | 
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| 244 | * @return string[]  | 
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| 245 | */  | 
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| 246 | 3 | protected function getImageExtensions(): array  | 
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| 250 | |||
| 251 | /**  | 
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| 252 | * @return string[]  | 
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| 253 | */  | 
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| 254 | 3 | protected function getMovieExtensions(): array  | 
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| 258 | |||
| 259 | /**  | 
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| 260 | * @return string[]  | 
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| 261 | */  | 
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| 262 | 3 | protected function getPdfExtensions(): array  | 
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| 266 | |||
| 267 | /**  | 
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| 268 | * @return string[]  | 
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| 269 | */  | 
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| 270 | 3 | protected function getPresentationExtensions(): array  | 
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| 274 | |||
| 275 | /**  | 
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| 276 | * @return string[]  | 
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| 277 | */  | 
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| 278 | 3 | protected function getTextExtensions(): array  | 
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| 282 | |||
| 283 | /**  | 
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| 284 | * @return string[]  | 
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| 285 | */  | 
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| 286 | 1 | protected function getWordExtensions(): array  | 
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| 290 | |||
| 291 | /**  | 
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| 292 | * @param $imageFilename  | 
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| 293 | * @return string  | 
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| 294 | */  | 
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| 295 | 2 | protected function getImageLocation($imageFilename): string  | 
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| 304 | }  | 
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| 305 |