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 FormTrait 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 FormTrait, and based on these observations, apply Extract Interface, too.
1 | <?php |
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18 | trait FormTrait |
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19 | { |
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20 | /** |
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21 | * The URI of a program that processes the form information. |
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22 | * |
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23 | * @var string |
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24 | */ |
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25 | private $action = ''; |
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26 | |||
27 | /** |
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28 | * The HTTP method that the browser uses to submit the form. |
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29 | * |
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30 | * @var string |
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31 | */ |
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32 | private $method = 'post'; |
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33 | |||
34 | /** |
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35 | * The form's display mode for multilingual fields. |
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36 | * |
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37 | * @var string |
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38 | */ |
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39 | private $l10nMode = 'loop_inputs'; |
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40 | |||
41 | /** |
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42 | * The form's display mode for groups. |
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43 | * |
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44 | * @var string |
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45 | */ |
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46 | protected $groupDisplayMode; |
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47 | |||
48 | /** |
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49 | * The form's field groups. |
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50 | * |
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51 | * @var FormGroupInterface[] |
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52 | */ |
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53 | protected $groups = []; |
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54 | |||
55 | /** |
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56 | * The form's predefined data. |
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57 | * |
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58 | * @var array $formData |
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59 | */ |
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60 | private $formData = []; |
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61 | |||
62 | /** |
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63 | * Store the form's metadata instance. |
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64 | * |
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65 | * @var MetadataInterface |
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66 | */ |
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67 | private $metadata; |
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68 | |||
69 | /** |
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70 | * Store the form's group factory instance. |
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71 | * |
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72 | * @var FactoryInterface |
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73 | */ |
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74 | protected $formGroupFactory; |
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75 | |||
76 | /** |
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77 | * Store the form's group callback. |
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78 | * |
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79 | * @var callable |
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80 | */ |
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81 | private $groupCallback; |
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82 | |||
83 | /** |
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84 | * @param FactoryInterface $factory A factory, to create customized form gorup objects. |
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85 | * @return FormInterface Chainable |
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86 | */ |
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87 | public function setFormGroupFactory(FactoryInterface $factory) |
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93 | |||
94 | /** |
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95 | * @throws Exception If the form group factory object was not set / injected. |
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96 | * @return FormInterface Chainable |
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97 | */ |
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98 | protected function formGroupFactory() |
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108 | |||
109 | /** |
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110 | * @param callable $cb The group callback. |
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111 | * @return FormInterface Chainable |
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112 | */ |
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113 | public function setGroupCallback(callable $cb) |
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119 | |||
120 | /** |
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121 | * @param string $action The "action" value, typically a URL. |
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122 | * @throws InvalidArgumentException If the action argument is not a string. |
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123 | * @return FormInterface Chainable |
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124 | */ |
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125 | public function setAction($action) |
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136 | |||
137 | /** |
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138 | * @return string |
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139 | */ |
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140 | public function action() |
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144 | |||
145 | /** |
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146 | * Set the method (forcing lowercase) to "post" or "get". |
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147 | * |
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148 | * @param string $method Either "post" or "get". |
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149 | * @throws InvalidArgumentException If the method is not post or get. |
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150 | * @return FormInterface Chainable |
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151 | */ |
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152 | public function setMethod($method) |
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164 | |||
165 | /** |
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166 | * @return string Either "post" or "get". |
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167 | */ |
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168 | public function method() |
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172 | |||
173 | /** |
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174 | * @param string $mode The l10n mode. |
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175 | * @return FormInterface Chainable |
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176 | */ |
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177 | public function setL10nMode($mode) |
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183 | |||
184 | /** |
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185 | * @return string |
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186 | */ |
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187 | public function l10nMode() |
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191 | |||
192 | /** |
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193 | * Set the object's form groups. |
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194 | * |
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195 | * @param array $groups A collection of group structures. |
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196 | * @return FormInterface Chainable |
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197 | */ |
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198 | public function setGroups(array $groups) |
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208 | |||
209 | /** |
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210 | * Add a form group. |
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211 | * |
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212 | * @param string $groupIdent The group identifier. |
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213 | * @param array|FormGroupInterface $group The group object or structure. |
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214 | * @throws InvalidArgumentException If the identifier is not a string or the group is invalid. |
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215 | * @return FormInterface Chainable |
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216 | */ |
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217 | public function addGroup($groupIdent, $group) |
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233 | |||
234 | /** |
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235 | * Parse a form group. |
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236 | * |
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237 | * @param string $groupIdent The group identifier. |
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238 | * @param array|FormGroupInterface $group The group object or structure. |
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239 | * @throws InvalidArgumentException If the identifier is not a string or the group is invalid. |
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240 | * @return FormGroupInterface |
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241 | */ |
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242 | protected function parseFormGroup($groupIdent, $group) |
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270 | |||
271 | /** |
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272 | * Create a new form group widget. |
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273 | * |
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274 | * @param array|null $data Optional. The form group data to set. |
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275 | * @return FormGroupInterface |
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276 | */ |
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277 | protected function createFormGroup(array $data = null) |
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294 | |||
295 | /** |
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296 | * Update the given form group widget. |
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297 | * |
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298 | * @param FormGroupInterface $group The form group to update. |
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299 | * @param array|null $groupData Optional. The new group data to apply. |
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300 | * @param string|null $groupIdent Optional. The new group identifier. |
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301 | * @return FormGroupInterface |
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302 | */ |
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303 | protected function updateFormGroup( |
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320 | |||
321 | /** |
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322 | * Retrieve the default form group class name. |
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323 | * |
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324 | * @return string |
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325 | */ |
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326 | public function defaultGroupType() |
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330 | |||
331 | /** |
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332 | * Retrieve the form groups. |
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333 | * |
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334 | * @param callable $groupCallback Optional callback applied to each form group. |
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335 | * @return FormGroupInterface[]|Generator |
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336 | */ |
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337 | public function groups(callable $groupCallback = null) |
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375 | |||
376 | /** |
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377 | * Determine if the form has any groups. |
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378 | * |
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379 | * @return boolean |
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380 | */ |
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381 | public function hasGroups() |
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385 | |||
386 | /** |
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387 | * Determine if the form has a given group. |
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388 | * |
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389 | * @param string $groupIdent The group identifier to look up. |
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390 | * @throws InvalidArgumentException If the group identifier is invalid. |
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391 | * @return boolean |
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392 | */ |
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393 | public function hasGroup($groupIdent) |
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403 | |||
404 | /** |
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405 | * Count the number of form groups. |
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406 | * |
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407 | * @return integer |
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408 | */ |
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409 | public function numGroups() |
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413 | |||
414 | /** |
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415 | * Set the widget's content group display mode. |
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416 | * |
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417 | * Currently only supports "tab". |
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418 | * |
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419 | * @param string $mode Group display mode. |
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420 | * @throws InvalidArgumentException If the display mode is not a string. |
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421 | * @return ObjectFormWidget Chainable. |
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422 | */ |
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423 | public function setGroupDisplayMode($mode) |
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439 | |||
440 | /** |
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441 | * Retrieve the widget's content group display mode. |
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442 | * |
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443 | * @return string Group display mode. |
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444 | */ |
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445 | public function groupDisplayMode() |
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449 | |||
450 | /** |
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451 | * Determine if content groups are to be displayed as tabbable panes. |
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452 | * |
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453 | * @return boolean |
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454 | */ |
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455 | public function isTabbable() |
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459 | |||
460 | /** |
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461 | * @param array $formData The (pre-populated) form data, as [$key=>$val] array. |
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462 | * @return FormInterface Chainable |
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463 | */ |
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464 | public function setFormData(array $formData) |
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470 | |||
471 | /** |
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472 | * @param string $key The form data key, or poperty identifier. |
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473 | * @param mixed $val The form data value, for a given key. |
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474 | * @throws InvalidArgumentException If the key argument is not a string. |
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475 | * @return FormInterface Chainable |
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476 | */ |
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477 | View Code Duplication | public function addFormData($key, $val) |
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488 | |||
489 | /** |
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490 | * @return array |
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491 | */ |
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492 | public function formData() |
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496 | } |
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497 |
This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.