Complex classes like MetaBox 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 MetaBox, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 15 | class MetaBox extends Component |
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| 16 | { |
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| 17 | use Condition; |
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| 18 | use Instruction; |
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| 19 | |||
| 20 | /** |
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| 21 | * @var string |
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| 22 | */ |
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| 23 | const ID = 'metaboxes'; |
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| 24 | |||
| 25 | /** |
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| 26 | * @var array |
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| 27 | */ |
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| 28 | public $metaboxes = []; |
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| 29 | |||
| 30 | /** |
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| 31 | * {@inheritdoc} |
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| 32 | */ |
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| 33 | public function init() |
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| 47 | |||
| 48 | /** |
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| 49 | * @param string $name |
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| 50 | * @param mixed ...$args |
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| 51 | * @return void |
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| 52 | */ |
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| 53 | public function action( $name, ...$args ) |
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| 57 | |||
| 58 | /** |
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| 59 | * @param string $name |
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| 60 | * @param mixed ...$args |
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| 61 | * @return mixed |
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| 62 | */ |
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| 63 | public function filter( $name, ...$args ) |
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| 67 | |||
| 68 | /** |
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| 69 | * @param string $key |
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| 70 | * @param mixed $fallback |
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| 71 | * @param string $group |
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| 72 | * @return string|array |
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| 73 | */ |
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| 74 | public function getMetaValue( $key, $fallback = '', $group = '' ) |
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| 80 | |||
| 81 | /** |
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| 82 | * @param array $field |
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| 83 | * @return array |
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| 84 | */ |
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| 85 | public function normalizeMapField( $field ) |
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| 99 | |||
| 100 | /** |
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| 101 | * @return array |
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| 102 | * @filter rwmb_meta_boxes |
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| 103 | */ |
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| 104 | public function register() |
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| 117 | |||
| 118 | /** |
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| 119 | * @return string |
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| 120 | * @filter rwmb_outer_html |
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| 121 | */ |
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| 122 | public function renderField( $html, $field ) |
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| 128 | |||
| 129 | /** |
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| 130 | * @return bool |
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| 131 | * @filter rwmb_show |
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| 132 | */ |
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| 133 | public function show( $bool, array $metabox ) |
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| 142 | |||
| 143 | /** |
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| 144 | * @return int |
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| 145 | */ |
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| 146 | protected function getPostId() |
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| 153 | |||
| 154 | /** |
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| 155 | * @return array |
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| 156 | */ |
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| 157 | protected function getPostTypes() |
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| 166 | |||
| 167 | /** |
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| 168 | * @return bool |
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| 169 | */ |
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| 170 | protected function hasPostType( array $metabox ) |
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| 177 | |||
| 178 | /** |
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| 179 | * @return void |
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| 180 | */ |
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| 181 | protected function normalize( array $metaboxes, array $defaults = [] ) |
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| 196 | |||
| 197 | /** |
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| 198 | * @param string $depends |
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| 199 | * @param string $parentId |
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| 200 | * @return string |
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| 201 | */ |
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| 202 | protected function normalizeDepends( $depends, array $data, $parentId ) |
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| 208 | |||
| 209 | /** |
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| 210 | * @param string $name |
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| 211 | * @param string $parentId |
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| 212 | * @return string |
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| 213 | */ |
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| 214 | protected function normalizeFieldName( $name, array $data, $parentId ) |
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| 218 | |||
| 219 | /** |
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| 220 | * @return array |
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| 221 | */ |
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| 222 | protected function normalizeFields( array $fields, array $data, $parentId ) |
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| 237 | |||
| 238 | /** |
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| 239 | * @param string $id |
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| 240 | * @param string $parentId |
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| 241 | * @return string |
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| 242 | */ |
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| 243 | protected function normalizeId( $id, array $data, $parentId ) |
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| 247 | |||
| 248 | /** |
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| 249 | * @param mixed $types |
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| 250 | * @return array |
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| 251 | */ |
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| 252 | protected function normalizePostTypes( $types ) |
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| 256 | |||
| 257 | /** |
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| 258 | * @return array |
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| 259 | */ |
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| 260 | protected function normalizeValidation( array $validation, array $data, $parentId ) |
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| 271 | |||
| 272 | /** |
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| 273 | * @return array |
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| 274 | */ |
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| 275 | protected function setDependencies( array $metabox ) |
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| 289 | } |
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| 290 |