Complex classes like FieldAbstract 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 FieldAbstract, and based on these observations, apply Extract Interface, too.
1 | <?php |
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22 | abstract class FieldAbstract implements FieldInterface |
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23 | { |
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24 | |||
25 | /** @var array $dynamicFormCollection */ |
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26 | private $dynamicFormCollection; |
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27 | |||
28 | /** @var FilterCollection $filterCollection */ |
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29 | private $filterCollection; |
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30 | |||
31 | /** @var ValidatorCollection $validatorCollection */ |
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32 | private $validatorCollection; |
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33 | |||
34 | /** @var FieldRendererInterface $renderer */ |
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35 | private $renderer; |
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36 | |||
37 | /** @var array $errorMessages */ |
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38 | private $errorMessages; |
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39 | |||
40 | /** @var string $customErrorMessage */ |
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41 | private $customErrorMessage; |
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42 | |||
43 | /** @var string $label */ |
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44 | private $label; |
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45 | |||
46 | /** @var bool $required */ |
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47 | private $required; |
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48 | |||
49 | use HasAttributesTrait; |
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50 | |||
51 | /** |
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52 | * @return string |
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53 | */ |
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54 | abstract public function getTag(); |
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55 | |||
56 | abstract public function init(); |
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57 | |||
58 | 42 | public function __construct($name, $value = null) |
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69 | |||
70 | /** |
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71 | * @return string |
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72 | */ |
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73 | 28 | public function getName() |
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77 | |||
78 | /** |
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79 | * @param string $name |
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80 | * @return FieldAbstract |
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81 | */ |
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82 | 42 | public function setName($name) |
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87 | |||
88 | /** |
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89 | * @return string |
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90 | */ |
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91 | 27 | public function getId() |
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95 | |||
96 | /** |
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97 | * @param string $id |
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98 | * @return FieldAbstract |
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99 | */ |
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100 | 8 | public function setId($id) |
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105 | |||
106 | /** |
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107 | * @return string |
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108 | */ |
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109 | 1 | public function getClass() |
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113 | |||
114 | /** |
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115 | * @param string $class |
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116 | * @return FieldAbstract |
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117 | */ |
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118 | 5 | public function setClass($class) |
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123 | |||
124 | /** |
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125 | * @return mixed |
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126 | */ |
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127 | 31 | public function getValue() |
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131 | |||
132 | /** |
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133 | * @param mixed $value |
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134 | * @return FieldAbstract |
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135 | */ |
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136 | 25 | public function setValue($value) |
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142 | |||
143 | /** |
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144 | * @param ValidatorInterface $validator |
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145 | * @return $this |
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146 | */ |
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147 | 15 | public function addValidator(ValidatorInterface $validator) |
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152 | |||
153 | /** |
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154 | * @return ValidatorCollection |
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155 | */ |
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156 | 1 | public function getValidators() |
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160 | |||
161 | /** |
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162 | * @param FilterInterface $filter |
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163 | * @return $this |
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164 | */ |
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165 | 22 | public function addFilter(FilterInterface $filter) |
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170 | |||
171 | /** |
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172 | * @return FilterCollection |
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173 | */ |
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174 | 1 | public function getFilters() |
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178 | |||
179 | /** |
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180 | * Runs the checkForErrors method for each field, which adds to errorMessages if invalid |
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181 | * |
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182 | * @return bool |
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183 | * @throws Exception If validation of $value is impossible |
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184 | */ |
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185 | 27 | public function isValid() |
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196 | |||
197 | /** |
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198 | * @param ValidatorInterface $validator |
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199 | */ |
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200 | 14 | private function checkForErrors(ValidatorInterface $validator) |
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208 | |||
209 | 25 | private function filterValue() |
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220 | |||
221 | /** |
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222 | * @return array |
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223 | */ |
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224 | 8 | public function getMessages() |
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228 | |||
229 | /** |
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230 | * @return string |
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231 | */ |
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232 | 26 | public function getLabel() |
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236 | |||
237 | /** |
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238 | * @param string $label |
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239 | * @return $this |
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240 | */ |
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241 | 14 | public function setLabel($label) |
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246 | |||
247 | /** |
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248 | * @param string $message |
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249 | * @return $this |
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250 | */ |
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251 | 2 | public function setCustomErrorMessage($message) |
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256 | |||
257 | /** |
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258 | * @return bool |
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259 | */ |
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260 | 4 | public function hasCustomErrorMessage() |
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264 | |||
265 | /** |
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266 | * @return string |
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267 | */ |
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268 | 2 | public function getCustomErrorMessage() |
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272 | |||
273 | /** |
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274 | * @return FieldRendererInterface |
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275 | */ |
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276 | 27 | public function getRenderer() |
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280 | |||
281 | /** |
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282 | * @param FieldRendererInterface $renderer |
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283 | * @return $this |
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284 | */ |
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285 | 29 | public function setRenderer(FieldRendererInterface $renderer) |
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290 | |||
291 | /** |
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292 | * If a field is required then it must have a value |
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293 | * We add a not empty validator |
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294 | * |
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295 | * @return boolean |
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296 | */ |
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297 | 31 | public function isRequired() |
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301 | |||
302 | /** |
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303 | * @param boolean $required |
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304 | * @return FieldAbstract |
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305 | */ |
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306 | 12 | public function setRequired($required) |
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312 | |||
313 | 12 | private function addNotEmptyValidator() |
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318 | |||
319 | 1 | private function removeNotEmptyValidator() |
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330 | |||
331 | /** |
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332 | * @param FormInterface $form |
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333 | * @param $triggerValue |
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334 | * @return $this |
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335 | */ |
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336 | public function addDynamicForm(FormInterface $form, $triggerValue) |
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350 | |||
351 | /** |
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352 | * @return bool |
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353 | */ |
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354 | 20 | public function hasDynamicForms() |
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358 | |||
359 | /** |
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360 | * @return FormInterface[] |
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361 | * @throws Exception |
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362 | */ |
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363 | public function getDynamicForms() |
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370 | } |
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: