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 FormElement 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 FormElement, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
||
| 8 | abstract class FormElement |
||
| 9 | { |
||
| 10 | use GluesAttributes; |
||
| 11 | |||
| 12 | /** @var array */ |
||
| 13 | protected $params; |
||
| 14 | |||
| 15 | /** @var Form */ |
||
| 16 | protected $form; |
||
| 17 | |||
| 18 | /** @var object */ |
||
| 19 | public $model = null; |
||
| 20 | |||
| 21 | /** @var string */ |
||
| 22 | public $id; |
||
| 23 | |||
| 24 | /** @var string */ |
||
| 25 | public $name; |
||
| 26 | |||
| 27 | /** @var mixed */ |
||
| 28 | public $value; |
||
| 29 | |||
| 30 | /** @var string */ |
||
| 31 | public $label; |
||
| 32 | |||
| 33 | /** @var array */ |
||
| 34 | public $class = []; |
||
| 35 | |||
| 36 | /** @var array */ |
||
| 37 | public $labelClass = []; |
||
| 38 | |||
| 39 | /** @var bool */ |
||
| 40 | public $required = false; |
||
| 41 | |||
| 42 | /** @var bool */ |
||
| 43 | public $disabled = false; |
||
| 44 | |||
| 45 | /** @var bool */ |
||
| 46 | public $readonly = false; |
||
| 47 | |||
| 48 | /** @var bool */ |
||
| 49 | public $autocomplete; |
||
| 50 | |||
| 51 | /** @var array */ |
||
| 52 | public $attributesList = []; |
||
| 53 | |||
| 54 | /** @var string */ |
||
| 55 | public $desc; |
||
| 56 | |||
| 57 | /** @var string */ |
||
| 58 | public $help; |
||
| 59 | |||
| 60 | /** @var array */ |
||
| 61 | public $customAttributes; |
||
| 62 | |||
| 63 | public function __construct(array $params) |
||
| 72 | |||
| 73 | protected function setForm() |
||
| 77 | |||
| 78 | protected function setModel() |
||
| 89 | |||
| 90 | protected function setCommonAttributes() |
||
| 106 | |||
| 107 | protected function setSpecificAttributes() |
||
| 111 | |||
| 112 | protected function setName() |
||
| 118 | |||
| 119 | protected function setLabel() |
||
| 140 | |||
| 141 | protected function setRequired() |
||
| 147 | |||
| 148 | protected function setDisabled() |
||
| 154 | |||
| 155 | protected function setReadonly() |
||
| 161 | |||
| 162 | protected function setValue() |
||
| 176 | |||
| 177 | View Code Duplication | protected function setAutocomplete() |
|
| 186 | |||
| 187 | protected function setDesc() |
||
| 193 | |||
| 194 | protected function setHelp() |
||
| 200 | |||
| 201 | protected function setClass() |
||
| 216 | |||
| 217 | protected function setDefaultClass() |
||
| 222 | |||
| 223 | protected function setCustomAttributes() |
||
| 229 | } |
||
| 230 |
This check looks for assignments to scalar types that may be of the wrong type.
To ensure the code behaves as expected, it may be a good idea to add an explicit type cast.