Complex classes like FileBehavior 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 FileBehavior, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 16 | class FileBehavior extends Behavior |
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| 17 | { |
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| 18 | /** |
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| 19 | * @var array |
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| 20 | */ |
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| 21 | public $attributes = []; |
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| 22 | /** |
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| 23 | * @var ActiveQuery |
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| 24 | */ |
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| 25 | private $relation; |
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| 26 | /** |
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| 27 | * @var FileBind |
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| 28 | */ |
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| 29 | private $fileBind; |
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| 30 | |||
| 31 | /** |
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| 32 | * @internal |
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| 33 | */ |
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| 34 | 31 | public function init() |
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| 42 | |||
| 43 | /** |
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| 44 | * @inheritdoc |
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| 45 | * @internal |
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| 46 | */ |
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| 47 | 31 | public function events() |
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| 57 | |||
| 58 | /** |
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| 59 | * @internal |
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| 60 | * @SuppressWarnings(PHPMD.UnusedFormalParameter) |
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| 61 | * @SuppressWarnings(PHPMD.UnusedLocalVariable) |
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| 62 | */ |
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| 63 | 22 | public function beforeSave($insert) |
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| 73 | |||
| 74 | /** |
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| 75 | * @internal |
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| 76 | */ |
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| 77 | 22 | public function afterSave() |
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| 114 | |||
| 115 | /** |
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| 116 | * @internal |
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| 117 | * @SuppressWarnings(PHPMD.UnusedLocalVariable) |
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| 118 | */ |
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| 119 | 1 | public function beforeDelete() |
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| 125 | |||
| 126 | 21 | private function clearState($attribute) |
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| 132 | |||
| 133 | 25 | private function setState($attribute, $file) |
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| 142 | |||
| 143 | 21 | private function setValue($attribute, $file, $defaultValue) |
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| 161 | |||
| 162 | /** |
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| 163 | * Generate a thumb |
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| 164 | * |
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| 165 | * @param string $attribute The attribute name |
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| 166 | * @param string $preset The preset name |
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| 167 | * @param string $path The file path |
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| 168 | * @return string The thumb path |
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| 169 | */ |
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| 170 | 25 | private function generateThumb($attribute, $preset, $path) |
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| 183 | |||
| 184 | /** |
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| 185 | * Generate file path by template |
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| 186 | * |
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| 187 | * @param string $attribute The attribute name |
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| 188 | * @param ActiveRecord $file The file model |
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| 189 | * @return string The file path |
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| 190 | */ |
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| 191 | 25 | private function templatePath($attribute, $file = null) |
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| 211 | |||
| 212 | /** |
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| 213 | * Get relation |
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| 214 | * |
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| 215 | * @param string $attribute The attribute name |
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| 216 | * @return \ActiveQuery |
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| 217 | */ |
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| 218 | 22 | public function fileRelation($attribute) |
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| 225 | |||
| 226 | /** |
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| 227 | * Get file option |
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| 228 | * |
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| 229 | * @param string $attribute The attribute name |
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| 230 | * @param string $option Option name |
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| 231 | * @param mixed $defaultValue Default value |
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| 232 | * @return mixed |
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| 233 | */ |
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| 234 | 30 | public function fileOption($attribute, $option, $defaultValue = null) |
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| 238 | |||
| 239 | /** |
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| 240 | * Get file storage |
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| 241 | * |
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| 242 | * @param string $attribute The attribute name |
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| 243 | * @return \Flysystem |
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| 244 | */ |
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| 245 | 26 | public function fileStorage($attribute) |
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| 249 | |||
| 250 | /** |
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| 251 | * Get file path |
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| 252 | * |
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| 253 | * @param string $attribute The attribute name |
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| 254 | * @param ActiveRecord $file Use this file model |
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| 255 | * @return string The file path |
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| 256 | */ |
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| 257 | 11 | public function filePath($attribute, $file = null) |
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| 262 | |||
| 263 | /** |
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| 264 | * Get file url |
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| 265 | * |
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| 266 | * @param string $attribute The attribute name |
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| 267 | * @param ActiveRecord $file Use this file model |
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| 268 | * @return string The file url |
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| 269 | */ |
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| 270 | 25 | public function fileUrl($attribute, $file = null) |
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| 275 | |||
| 276 | /** |
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| 277 | * Get extra fields of file |
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| 278 | * |
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| 279 | * @param string $attribute The attribute name |
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| 280 | * @return array |
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| 281 | */ |
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| 282 | 2 | public function fileExtraFields($attribute) |
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| 290 | |||
| 291 | /** |
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| 292 | * Get files |
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| 293 | * |
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| 294 | * @param string $attribute The attribute name |
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| 295 | * @return \ActiveRecord[] The file models |
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| 296 | */ |
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| 297 | 9 | public function allFiles($attribute) |
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| 301 | |||
| 302 | /** |
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| 303 | * Get the file |
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| 304 | * |
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| 305 | * @param string $attribute The attribute name |
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| 306 | * @return \ActiveRecord The file model |
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| 307 | */ |
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| 308 | 12 | public function file($attribute) |
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| 312 | |||
| 313 | /** |
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| 314 | * Get rules |
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| 315 | * |
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| 316 | * @param string $attribute The attribute name |
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| 317 | * @param bool $onlyCoreValidators Only core validators |
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| 318 | * @return array |
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| 319 | */ |
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| 320 | 29 | public function fileRules($attribute, $onlyCoreValidators = false) |
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| 329 | |||
| 330 | /** |
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| 331 | * Get file state |
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| 332 | * |
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| 333 | * @param string $attribute The attribute name |
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| 334 | * @return array |
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| 335 | */ |
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| 336 | 20 | public function fileState($attribute) |
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| 341 | |||
| 342 | /** |
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| 343 | * Get the presets of the file for apply after upload |
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| 344 | * |
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| 345 | * @param string $attribute The attribute name |
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| 346 | * @return array |
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| 347 | */ |
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| 348 | 25 | public function filePresetAfterUpload($attribute) |
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| 356 | |||
| 357 | /** |
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| 358 | * Create a thumb and return url |
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| 359 | * |
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| 360 | * @param string $attribute The attribute name |
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| 361 | * @param string $preset The preset name |
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| 362 | * @param ActiveRecord $file Use this file model |
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| 363 | * @return string The file url |
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| 364 | */ |
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| 365 | 25 | public function thumbUrl($attribute, $preset, $file = null) |
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| 372 | |||
| 373 | /** |
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| 374 | * Create a thumb and return full path |
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| 375 | * |
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| 376 | * @param string $attribute The attribute name |
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| 377 | * @param string $preset The preset name |
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| 378 | * @param ActiveRecord $file Use this file model |
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| 379 | * @return string The file path |
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| 380 | */ |
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| 381 | 6 | public function thumbPath($attribute, $preset, $file = null) |
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| 388 | |||
| 389 | /** |
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| 390 | * Create a file |
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| 391 | * |
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| 392 | * @param string $attribute The attribute name |
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| 393 | * @param string $path The file path |
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| 394 | * @param string $name The file name |
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| 395 | * @return \ActiveRecord The file model |
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| 396 | */ |
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| 397 | 25 | public function createFile($attribute, $path, $name) |
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| 413 | } |
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| 414 |
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: