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_hookup 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_hookup, and based on these observations, apply Extract Interface, too.
1 | <?php |
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14 | class CMB2_hookup { |
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15 | |||
16 | /** |
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17 | * Array of all hooks done (to be run once) |
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18 | * @var array |
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19 | * @since 2.0.0 |
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20 | */ |
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21 | protected static $hooks_completed = array(); |
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22 | |||
23 | /** |
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24 | * Only allow JS registration once |
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25 | * @var bool |
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26 | * @since 2.0.7 |
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27 | */ |
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28 | protected static $js_registration_done = false; |
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29 | |||
30 | /** |
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31 | * Only allow CSS registration once |
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32 | * @var bool |
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33 | * @since 2.0.7 |
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34 | */ |
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35 | protected static $css_registration_done = false; |
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36 | |||
37 | /** |
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38 | * @var CMB2 object |
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39 | * @since 2.0.2 |
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40 | */ |
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41 | protected $cmb; |
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42 | |||
43 | /** |
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44 | * CMB taxonomies array for term meta |
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45 | * @var array |
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46 | * @since 2.2.0 |
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47 | */ |
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48 | protected $taxonomies = array(); |
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49 | |||
50 | /** |
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51 | * Custom field columns. |
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52 | * @var array |
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53 | * @since 2.2.2 |
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54 | */ |
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55 | protected $columns = array(); |
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56 | |||
57 | /** |
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58 | * The object type we are performing the hookup for |
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59 | * @var string |
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60 | * @since 2.0.9 |
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61 | */ |
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62 | protected $object_type = 'post'; |
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63 | |||
64 | public function __construct( CMB2 $cmb ) { |
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85 | |||
86 | public function universal_hooks() { |
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99 | |||
100 | public function post_hooks() { |
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113 | |||
114 | public function comment_hooks() { |
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123 | |||
124 | public function user_hooks() { |
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140 | |||
141 | public function term_hooks() { |
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180 | |||
181 | /** |
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182 | * Registers styles for CMB2 |
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183 | * @since 2.0.7 |
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184 | */ |
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185 | protected static function register_styles() { |
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202 | 1 | ||
203 | 1 | /** |
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204 | * Registers scripts for CMB2 |
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205 | * @since 2.0.7 |
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206 | */ |
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207 | protected static function register_js() { |
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217 | 1 | ||
218 | 1 | /** |
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219 | * Registers scripts and styles for CMB2 |
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220 | * @since 1.0.0 |
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221 | */ |
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222 | public static function register_scripts() { |
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226 | |||
227 | /** |
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228 | * Enqueues scripts and styles for CMB2 in admin_head. |
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229 | * @since 1.0.0 |
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230 | */ |
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231 | public function do_scripts( $hook ) { |
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255 | |||
256 | /** |
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257 | * Register the CMB2 field column headers. |
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258 | * @since 2.2.2 |
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259 | */ |
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260 | public function register_column_headers( $columns ) { |
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287 | |||
288 | /** |
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289 | * The CMB2 field column display output. |
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290 | * @since 2.2.2 |
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291 | */ |
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292 | public function column_display( $column_name, $object_id ) { |
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304 | |||
305 | /** |
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306 | * Returns the column display. |
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307 | * @since 2.2.2 |
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308 | */ |
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309 | public function return_column_display( $empty, $custom_column, $object_id ) { |
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316 | |||
317 | /** |
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318 | * Add metaboxes (to 'post' or 'comment' object types) |
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319 | * @since 1.0.0 |
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320 | */ |
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321 | public function add_metaboxes() { |
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348 | |||
349 | /** |
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350 | * Add 'closed' class to metabox |
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351 | * @since 2.0.0 |
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352 | * @param array $classes Array of classes |
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353 | * @return array Modified array of classes |
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354 | */ |
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355 | public function close_metabox_class( $classes ) { |
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359 | |||
360 | /** |
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361 | * Display metaboxes for a post or comment object |
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362 | * @since 1.0.0 |
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363 | */ |
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364 | public function metabox_callback() { |
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368 | |||
369 | /** |
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370 | * Display metaboxes for new user page |
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371 | * @since 1.0.0 |
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372 | */ |
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373 | public function user_new_metabox( $section ) { |
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380 | |||
381 | /** |
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382 | * Display metaboxes for a user object |
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383 | * @since 1.0.0 |
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384 | */ |
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385 | public function user_metabox() { |
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388 | |||
389 | /** |
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390 | * Display metaboxes for a taxonomy term object |
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391 | * @since 2.2.0 |
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392 | */ |
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393 | public function term_metabox() { |
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396 | |||
397 | /** |
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398 | * Display metaboxes for an object type |
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399 | * @since 2.2.0 |
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400 | * @param string $type Object type |
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401 | * @return void |
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402 | */ |
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403 | public function show_form_for_type( $type ) { |
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421 | |||
422 | /** |
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423 | * Determines if metabox should be shown in current context |
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424 | * @since 2.0.0 |
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425 | * @return bool Whether metabox should be added/shown |
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426 | */ |
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427 | public function show_on() { |
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442 | |||
443 | /** |
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444 | * Get the CMB priority property set to numeric hook priority. |
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445 | * @since 2.2.0 |
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446 | * @param integer $default Default display hook priority. |
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447 | * @return integer Hook priority. |
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448 | */ |
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449 | public function get_priority( $default = 10 ) { |
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471 | |||
472 | /** |
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473 | * Save data from post metabox |
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474 | * @since 1.0.0 |
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475 | * @param int $post_id Post ID |
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476 | * @param mixed $post Post object |
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477 | * @return null |
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478 | */ |
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479 | public function save_post( $post_id, $post = false ) { |
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498 | |||
499 | /** |
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500 | * Save data from comment metabox |
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501 | * @since 2.0.9 |
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502 | * @param int $comment_id Comment ID |
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503 | * @return null |
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504 | */ |
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505 | public function save_comment( $comment_id ) { |
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513 | |||
514 | /** |
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515 | * Save data from user fields |
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516 | * @since 1.0.x |
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517 | * @param int $user_id User ID |
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518 | * @return null |
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519 | */ |
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520 | public function save_user( $user_id ) { |
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526 | |||
527 | /** |
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528 | * Save data from term fields |
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529 | * @since 2.2.0 |
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530 | * @param int $term_id Term ID |
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531 | * @param int $tt_id Term Taxonomy ID |
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532 | * @param string $taxonomy Taxonomy |
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533 | * @return null |
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534 | */ |
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535 | public function save_term( $term_id, $tt_id, $taxonomy = '' ) { |
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543 | |||
544 | /** |
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545 | * Delete term meta when a term is deleted. |
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546 | * @since 2.2.0 |
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547 | * @param int $term_id Term ID |
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548 | * @param int $tt_id Term Taxonomy ID |
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549 | * @param string $taxonomy Taxonomy |
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550 | * @return null |
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551 | */ |
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552 | public function delete_term( $term_id, $tt_id, $taxonomy = '' ) { |
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562 | |||
563 | /** |
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564 | * Determines if the current object is able to be saved |
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565 | * @since 2.0.9 |
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566 | * @param string $type Current post_type or comment_type |
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567 | * @return bool Whether object can be saved |
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568 | */ |
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569 | public function can_save( $type = '' ) { |
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581 | |||
582 | /** |
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583 | * Determine if taxonomy of term being modified is cmb2-editable. |
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584 | * @since 2.2.0 |
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585 | * @param string $taxonomy Taxonomy of term being modified. |
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586 | * @return bool Whether taxonomy is editable. |
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587 | */ |
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588 | public function taxonomy_can_save( $taxonomy ) { |
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601 | |||
602 | /** |
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603 | * Ensures WordPress hook only gets fired once |
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604 | * @since 2.0.0 |
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605 | * @param string $action The name of the filter to hook the $hook callback to. |
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606 | * @param callback $hook The callback to be run when the filter is applied. |
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607 | * @param integer $priority Order the functions are executed |
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608 | * @param int $accepted_args The number of arguments the function accepts. |
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609 | */ |
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610 | public function once( $action, $hook, $priority = 10, $accepted_args = 1 ) { |
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620 | |||
621 | /** |
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622 | * Enqueues the 'cmb2-display-styles' if the conditions match (has columns, on the right page, etc). |
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623 | * @since 2.2.2.1 |
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624 | */ |
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625 | protected function maybe_enqueue_column_display_styles() { |
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636 | |||
637 | /** |
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638 | * Includes CMB2 styles |
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639 | * @since 2.0.0 |
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640 | 1 | */ |
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641 | 1 | public static function enqueue_cmb_css( $handle = 'cmb2-styles' ) { |
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654 | |||
655 | /** |
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656 | * Includes CMB2 JS |
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657 | * @since 2.0.0 |
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658 | */ |
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659 | public static function enqueue_cmb_js() { |
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667 | |||
668 | } |
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669 |
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.