Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like Uploadable 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 Uploadable, and based on these observations, apply Extract Interface, too.
1 | <?php |
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19 | trait Uploadable |
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20 | { |
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21 | /** @var UploadOptions */ |
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22 | protected $uploadOptions; |
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23 | |||
24 | /** |
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25 | * Determine if the model or given attribute(s) have been modified. |
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26 | * Implemented in \Illuminate\Database\Eloquent\Model |
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27 | * |
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28 | * @param array|string|null $attributes = null |
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29 | * |
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30 | * @return bool |
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31 | */ |
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32 | abstract public function isDirty($attributes = null); |
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33 | |||
34 | /** |
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35 | * Get the model's original attribute values. |
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36 | * Implemented in \Illuminate\Database\Eloquent\Model |
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37 | * |
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38 | * @param string|null $key = null |
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39 | * @param mixed $default = null |
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40 | * |
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41 | * @return mixed|array |
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42 | */ |
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43 | abstract public function getOriginal($key = null, $default = null); |
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44 | |||
45 | /** |
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46 | * Boot the trait. |
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47 | */ |
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48 | public static function bootUploadable() |
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55 | |||
56 | /** |
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57 | * Bind create model events. |
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58 | */ |
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59 | protected static function bindCreateEvents() |
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66 | |||
67 | /** |
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68 | * Bind save model events. |
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69 | */ |
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70 | protected static function bindSaveEvents() |
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76 | |||
77 | /** |
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78 | * Bind update model events. |
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79 | */ |
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80 | protected static function bindUpdateEvents() |
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87 | |||
88 | /** |
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89 | * Bind delete model events. |
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90 | */ |
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91 | protected static function bindDeleteEvents() |
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104 | |||
105 | /** |
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106 | * Retrive a specifice UploadOptions for this model, or return default UploadOptions |
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107 | * @return UploadOptions |
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108 | */ |
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109 | public function getUploadOptionsOrDefault() : UploadOptions |
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125 | |||
126 | /** |
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127 | * This function will throw an exception when any of the options is missing or invalid. |
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128 | * @throws InvalidOption |
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129 | */ |
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130 | public function guardAgainstInvalidUploadOptions() |
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139 | |||
140 | /** |
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141 | * Handle file upload. |
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142 | */ |
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143 | public function uploadFiles() |
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156 | |||
157 | /** |
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158 | * Upload a file releted to a passed attribute name |
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159 | * @param string $uploadField |
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160 | */ |
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161 | public function uploadFile(string $uploadField) |
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187 | |||
188 | /** |
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189 | * Get an UploadedFile, generate new name, and save it in destination path. |
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190 | * Return empty string if it fails, otherwise return the saved file name. |
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191 | * @param UploadedFile $uploadedFile |
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192 | * @param string $uploadAttribute |
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193 | * @return string |
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194 | */ |
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195 | public function doUpload(UploadedFile $uploadedFile, $uploadAttribute) : string |
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227 | |||
228 | /** |
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229 | * Check request for valid files and server for correct paths defined in model |
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230 | * @return bool |
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231 | */ |
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232 | public function requestHasValidFilesAndCorrectPaths() : bool |
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246 | |||
247 | /** |
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248 | * Generate a new file name for uploaded file. |
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249 | * Return empty string if uploadedFile is null, otherwise return the new file name.. |
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250 | * @param UploadedFile $uploadedFile |
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251 | * @return string |
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252 | * @internal param string $uploadField |
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253 | */ |
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254 | public function generateNewUploadFileName(UploadedFile $uploadedFile) : string |
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269 | |||
270 | /** |
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271 | * Check if file need a new name and return it, otherwise return empty string. |
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272 | * @param UploadedFile $uploadedFile |
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273 | * @return string |
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274 | */ |
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275 | public function calcolateNewUploadFileName(UploadedFile $uploadedFile) : string |
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288 | |||
289 | /** |
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290 | * delete all Uploaded Files |
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291 | */ |
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292 | public function deleteUploadedFiles() |
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299 | |||
300 | /** |
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301 | * Delete upload file related to passed attribute name |
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302 | * @param string $uploadField |
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303 | */ |
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304 | public function deleteUploadedFile(string $uploadField) |
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326 | |||
327 | /** |
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328 | * Reset model attribute and update db field |
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329 | * @param string $uploadField |
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330 | */ |
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331 | public function setBlanckAttributeAndDB(string $uploadField) |
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348 | |||
349 | /** |
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350 | * Return true If All Upload atrributes Are Empty or |
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351 | * if the uploads array is not set. |
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352 | * @return bool |
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353 | */ |
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354 | public function checkIfAllUploadFieldsAreEmpty() : bool |
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365 | |||
366 | /** |
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367 | * Check all attributes upload path, and try to create dir if not already exists. |
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368 | * Return false if it fails to create all founded dirs. |
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369 | * @return bool |
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370 | */ |
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371 | public function checkOrCreateAllUploadBasePaths() : bool |
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381 | |||
382 | /** |
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383 | * Check uploads property and return a uploads class field |
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384 | * or empty array if somethings wrong. |
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385 | * @return array |
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386 | */ |
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387 | public function getUploadsAttributesSafe() : array |
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395 | |||
396 | /** |
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397 | * Check attribute upload path, and try to create dir if not already exists. |
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398 | * Return false if it fails to create the dir. |
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399 | * @param string $uploadField |
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400 | * @return bool |
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401 | */ |
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402 | public function checkOrCreateUploadBasePath(string $uploadField) : bool |
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415 | |||
416 | /** |
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417 | * Return the upload path for the passed attribute and try to create it if not exists. |
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418 | * Returns empty string if dir if not exists and fails to create it. |
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419 | * @param string $uploadField |
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420 | * @return string |
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421 | */ |
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422 | public function getUploadFileBasePath(string $uploadField) : string |
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445 | |||
446 | /** |
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447 | * Return the specific upload path (by uploadPaths prop) for the passed attribute if exists, |
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448 | * otherwise return empty string. |
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449 | * If uploadPaths for this field is relative, a public_path was appended. |
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450 | * @param string $uploadField |
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451 | * @return string |
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452 | */ |
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453 | public function getUploadFileBasePathSpecific(string $uploadField) : string |
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466 | |||
467 | /** |
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468 | * Check if there is a specified upload path setted for this field |
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469 | * @param string $uploadField |
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470 | * @return bool |
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471 | */ |
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472 | public function hasUploadPathSpecifiedForThisField(string $uploadField) : bool |
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479 | |||
480 | /** |
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481 | * Return the full (path+filename) upload abs path for the passed attribute. |
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482 | * Returns empty string if dir if not exists. |
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483 | * @param string $uploadField |
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484 | * @return string |
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485 | */ |
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486 | public |
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500 | |||
501 | /** |
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502 | * Return the full url (base url + filename) for the passed attribute. |
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503 | * Returns empty string if dir if not exists. |
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504 | * Ex.: http://localhost/laravel/public/upload/news/pippo.jpg |
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505 | * @param string $uploadField |
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506 | * @return string |
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507 | */ |
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508 | View Code Duplication | public |
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517 | |||
518 | /** |
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519 | * get a path and remove public_path. |
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520 | * @param string $path |
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521 | * @return string |
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522 | */ |
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523 | public |
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542 | |||
543 | /** |
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544 | * Return the base url (without filename) for the passed attribute. |
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545 | * Returns empty string if dir if not exists. |
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546 | * Ex.: http://localhost/laravel/public/upload/ |
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547 | * @param string $uploadField |
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548 | * @return string |
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549 | */ |
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550 | View Code Duplication | public |
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565 | |||
566 | /** |
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567 | * Calcolate the new name for ALL uploaded files and set relative upload attributes |
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568 | */ |
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569 | public |
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576 | |||
577 | /** |
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578 | * Calcolate the new name for uploaded file relative to passed attribute name and set the upload attribute |
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579 | * @param string $uploadField |
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580 | */ |
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581 | public |
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602 | |||
603 | /** |
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604 | * @param string $uploadField |
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605 | * @param string $newName |
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606 | */ |
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607 | public |
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619 | |||
620 | /** |
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621 | * @param string $path |
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622 | * @return bool |
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623 | */ |
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624 | public |
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631 | |||
632 | /** |
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633 | * Check if all uploadedFields are changed, so there is an old value |
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634 | * for attribute and if true try to unlink old file. |
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635 | */ |
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636 | public |
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643 | |||
644 | /** |
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645 | * Check if $uploadField are changed, so there is an old value |
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646 | * for $uploadField attribute and if true try to unlink old file. |
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647 | * @param string $uploadField |
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648 | */ |
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649 | public |
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665 | } |
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666 |
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idable
provides a methodequalsId
that in turn relies on the methodgetId()
. If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()
as an abstract method to the trait will make sure it is available.