WebDevStudios /
CMB2
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 CMB2_Base 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 CMB2_Base, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 18 | abstract class CMB2_Base { |
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| 19 | |||
| 20 | /** |
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| 21 | * Current CMB2 instance ID |
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| 22 | * @var string |
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| 23 | * @since 2.2.3 |
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| 24 | */ |
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| 25 | protected $cmb_id = ''; |
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| 26 | |||
| 27 | /** |
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| 28 | * The object properties name. |
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| 29 | * @var string |
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| 30 | * @since 2.2.3 |
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| 31 | */ |
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| 32 | protected $properties_name = 'meta_box'; |
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| 33 | |||
| 34 | /** |
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| 35 | * Object ID |
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| 36 | * @var mixed |
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| 37 | * @since 2.2.3 |
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| 38 | */ |
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| 39 | protected $object_id = 0; |
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| 40 | |||
| 41 | /** |
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| 42 | * Type of object being handled. (e.g., post, user, comment, or term) |
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| 43 | * @var string |
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| 44 | * @since 2.2.3 |
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| 45 | */ |
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| 46 | protected $object_type = 'post'; |
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| 47 | |||
| 48 | /** |
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| 49 | * Array of key => value data for saving. Likely $_POST data. |
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| 50 | * @var array |
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| 51 | * @since 2.2.3 |
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| 52 | */ |
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| 53 | public $data_to_save = array(); |
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| 54 | |||
| 55 | /** |
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| 56 | * Array of field param callback results |
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| 57 | * @var array |
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| 58 | * @since 2.0.0 |
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| 59 | */ |
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| 60 | protected $callback_results = array(); |
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| 61 | |||
| 62 | /** |
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| 63 | * The deprecated_param method deprecated param message signature. |
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| 64 | */ |
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| 65 | const DEPRECATED_PARAM = 1; |
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| 66 | |||
| 67 | /** |
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| 68 | * The deprecated_param method deprecated callback param message signature. |
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| 69 | */ |
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| 70 | const DEPRECATED_CB_PARAM = 2; |
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| 71 | |||
| 72 | /** |
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| 73 | * Get started |
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| 74 | * @since 2.2.3 |
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| 75 | * @param array $args Object properties array |
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| 76 | */ |
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| 77 | public function __construct( $args = array() ) { |
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| 92 | |||
| 93 | /** |
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| 94 | * Returns the object ID |
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| 95 | * @since 2.2.3 |
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| 96 | * @param integer $object_id Object ID |
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| 97 | * @return integer Object ID |
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| 98 | */ |
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| 99 | 5 | public function object_id( $object_id = 0 ) { |
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| 106 | |||
| 107 | /** |
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| 108 | * Returns the object type |
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| 109 | * @since 2.2.3 |
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| 110 | * @param string $object_type Object Type |
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| 111 | * @return string Object type |
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| 112 | */ |
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| 113 | 5 | public function object_type( $object_type = '' ) { |
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| 120 | |||
| 121 | /** |
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| 122 | * Get the object type for the current page, based on the $pagenow global. |
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| 123 | * @since 2.2.2 |
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| 124 | * @return string Page object type name. |
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| 125 | */ |
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| 126 | View Code Duplication | public function current_object_type() { |
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| 144 | |||
| 145 | /** |
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| 146 | * Set object property. |
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| 147 | * @since 2.2.2 |
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| 148 | * @param string $property Metabox config property to retrieve |
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| 149 | * @param mixed $value Value to set if no value found |
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| 150 | * @return mixed Metabox config property value or false |
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| 151 | */ |
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| 152 | public function set_prop( $property, $value ) { |
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| 157 | |||
| 158 | /** |
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| 159 | * Get object property and optionally set a fallback |
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| 160 | * @since 2.0.0 |
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| 161 | * @param string $property Metabox config property to retrieve |
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| 162 | * @param mixed $fallback Fallback value to set if no value found |
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| 163 | * @return mixed Metabox config property value or false |
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| 164 | */ |
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| 165 | 43 | public function prop( $property, $fallback = null ) { |
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| 172 | |||
| 173 | /** |
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| 174 | * Get default field arguments specific to this CMB2 object. |
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| 175 | * @since 2.2.0 |
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| 176 | * @param array $field_args Metabox field config array. |
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| 177 | * @param CMB2_Field $field_group (optional) CMB2_Field object (group parent) |
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| 178 | * @return array Array of field arguments. |
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| 179 | */ |
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| 180 | 5 | View Code Duplication | protected function get_default_args( $field_args, $field_group = null ) { |
| 197 | |||
| 198 | /** |
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| 199 | * Get a new field object specific to this CMB2 object. |
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| 200 | * @since 2.2.0 |
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| 201 | * @param array $field_args Metabox field config array. |
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| 202 | * @param CMB2_Field $field_group (optional) CMB2_Field object (group parent) |
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| 203 | * @return CMB2_Field CMB2_Field object |
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| 204 | */ |
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| 205 | 5 | protected function get_new_field( $field_args, $field_group = null ) { |
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| 208 | |||
| 209 | /** |
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| 210 | * Determine whether this cmb object should show, based on the 'show_on_cb' callback. |
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| 211 | * |
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| 212 | * @since 2.0.9 |
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| 213 | * |
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| 214 | * @return bool Whether this cmb should be shown. |
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| 215 | */ |
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| 216 | 43 | public function should_show() { |
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| 227 | |||
| 228 | /** |
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| 229 | * Displays the results of the param callbacks. |
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| 230 | * |
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| 231 | * @since 2.0.0 |
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| 232 | * @param string $param Field parameter |
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| 233 | */ |
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| 234 | 80 | public function peform_param_callback( $param ) { |
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| 237 | |||
| 238 | /** |
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| 239 | * Store results of the param callbacks for continual access |
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| 240 | * @since 2.0.0 |
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| 241 | * @param string $param Field parameter |
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| 242 | * @return mixed Results of param/param callback |
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| 243 | */ |
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| 244 | 84 | public function get_param_callback_result( $param ) { |
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| 275 | |||
| 276 | /** |
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| 277 | * Handles the property callbacks, and passes this object as property. |
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| 278 | * @since 2.2.3 |
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| 279 | * @param callable $cb The callback method/function/closure |
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| 280 | * @return mixed Return of the callback function. |
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| 281 | */ |
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| 282 | 49 | protected function do_callback( $cb ) { |
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| 285 | |||
| 286 | /** |
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| 287 | * Checks if field has a callback value |
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| 288 | * @since 1.0.1 |
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| 289 | * @param string $cb Callback string |
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| 290 | * @return mixed NULL, false for NO validation, or $cb string if it exists. |
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| 291 | */ |
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| 292 | 97 | public function maybe_callback( $cb ) { |
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| 312 | |||
| 313 | /** |
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| 314 | * Mark a param as deprecated and inform when it has been used. |
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| 315 | * |
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| 316 | * There is a default WordPress hook deprecated_argument_run that will be called |
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| 317 | * that can be used to get the backtrace up to what file and function used the |
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| 318 | * deprecated argument. |
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| 319 | * |
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| 320 | * The current behavior is to trigger a user error if WP_DEBUG is true. |
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| 321 | * |
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| 322 | * @since 2.2.3 |
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| 323 | * |
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| 324 | * @param string $function The function that was called. |
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| 325 | * @param string $version The version of CMB2 that deprecated the argument used. |
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| 326 | * @param string $message Optional. A message regarding the change, or numeric |
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| 327 | * key to generate message from additional arguments. |
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| 328 | * Default null. |
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| 329 | */ |
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| 330 | 2 | protected function deprecated_param( $function, $version, $message = null ) { |
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| 387 | |||
| 388 | /** |
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| 389 | * Magic getter for our object. |
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| 390 | * @param string $field |
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| 391 | * @throws Exception Throws an exception if the field is invalid. |
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| 392 | * @return mixed |
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| 393 | */ |
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| 394 | 65 | public function __get( $field ) { |
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| 411 | |||
| 412 | } |
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| 413 |
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You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.