Complex classes like ClassyPost 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 ClassyPost, and based on these observations, apply Extract Interface, too.
1 | <?php |
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6 | class ClassyPost extends ClassyBasis { |
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7 | |||
8 | /** |
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9 | * Current post id. |
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10 | * |
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11 | * @var int |
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12 | */ |
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13 | public $ID; |
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14 | |||
15 | /** |
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16 | * Stores current post object. |
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17 | * |
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18 | * @var WP_Post |
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19 | */ |
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20 | protected $object; |
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21 | |||
22 | /** |
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23 | * Post title. |
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24 | * |
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25 | * @var string |
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26 | */ |
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27 | public $post_title; |
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28 | |||
29 | /** |
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30 | * Post name. |
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31 | * |
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32 | * @var string |
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33 | */ |
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34 | public $post_name; |
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35 | |||
36 | /** |
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37 | * Post content (raw). |
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38 | * |
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39 | * @var string |
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40 | */ |
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41 | public $post_content; |
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42 | |||
43 | /** |
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44 | * Post type. |
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45 | * |
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46 | * @var string |
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47 | */ |
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48 | public $post_type; |
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49 | |||
50 | /** |
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51 | * Post author id. |
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52 | * |
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53 | * @var int |
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54 | */ |
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55 | public $post_author; |
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56 | |||
57 | /** |
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58 | * Post date. String as stored in the WP database, ex: 2012-04-23 08:11:23. |
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59 | * |
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60 | * @var string |
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61 | */ |
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62 | public $post_date; |
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63 | |||
64 | /** |
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65 | * Post excerpt (raw). |
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66 | * |
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67 | * @var string |
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68 | */ |
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69 | public $post_excerpt; |
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70 | |||
71 | /** |
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72 | * Post status. It can be draft, publish, pending, private, trash, etc. |
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73 | * |
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74 | * @var string |
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75 | */ |
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76 | public $post_status; |
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77 | |||
78 | /** |
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79 | * Post permalink. |
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80 | * |
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81 | * @var string |
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82 | */ |
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83 | public $permalink; |
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84 | |||
85 | /** |
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86 | * Main constructor function. If ID won't be provided we will try to find it, based on your query. |
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87 | * |
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88 | * @param object|int $post WP_Post or WP_Post.ID. |
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89 | */ |
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90 | public function __construct( $post = null ) { |
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98 | |||
99 | /** |
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100 | * Initialises Instance based on provided post id. |
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101 | */ |
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102 | protected function init() { |
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109 | |||
110 | /** |
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111 | * Returns post object. |
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112 | * |
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113 | * @return WP_Post |
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114 | */ |
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115 | public function get_object() { |
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120 | |||
121 | /** |
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122 | * Checks if current user can edit this post. |
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123 | * |
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124 | * @return boolean |
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125 | */ |
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126 | public function can_edit() { |
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136 | |||
137 | /** |
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138 | * Returns post edit url. |
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139 | * |
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140 | * @return string |
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141 | */ |
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142 | public function get_edit_url() { |
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149 | |||
150 | /** |
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151 | * Returns array of attached image ids. |
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152 | * |
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153 | * @return false|array of ids |
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154 | */ |
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155 | public function get_attached_images() { |
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175 | |||
176 | /** |
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177 | * Returns array of attached images as ClassyImage objects. |
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178 | * |
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179 | * @return array of ClassyImage |
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180 | */ |
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181 | public function attached_images() { |
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197 | |||
198 | |||
199 | /** |
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200 | * Returns first attached image id. |
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201 | * |
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202 | * @return int|boolean |
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203 | */ |
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204 | public function get_first_attached_image_id() { |
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226 | |||
227 | /** |
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228 | * Returns first attached image. |
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229 | * |
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230 | * @return ClassyImage |
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231 | */ |
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232 | public function first_attached_image() { |
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242 | |||
243 | /** |
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244 | * Returns post thumbnail. |
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245 | * |
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246 | * @return ClassyImage |
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247 | */ |
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248 | public function thumbnail() { |
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261 | |||
262 | /** |
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263 | * Returns post title with filters applied. |
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264 | * |
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265 | * @return string |
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266 | */ |
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267 | public function get_title() { |
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270 | |||
271 | /** |
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272 | * Alias for get_title. |
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273 | * |
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274 | * @return string |
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275 | */ |
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276 | public function title() { |
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279 | |||
280 | /** |
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281 | * Returns the post content with filters applied. |
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282 | * |
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283 | * @param integer $page Page number, in case our post has <!--nextpage--> tags. |
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284 | * |
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285 | * @return string Post content |
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286 | */ |
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287 | public function get_content( $page = 0 ) { |
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308 | |||
309 | /** |
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310 | * Alias for get_content. |
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311 | * |
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312 | * @return string |
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313 | */ |
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314 | public function content() { |
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317 | |||
318 | /** |
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319 | * Returns post type object for current post. |
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320 | * |
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321 | * @return object |
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322 | */ |
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323 | public function get_post_type() { |
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326 | |||
327 | /** |
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328 | * Returns post permalink. |
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329 | * |
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330 | * @return string |
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331 | */ |
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332 | public function get_permalink() { |
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341 | |||
342 | /** |
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343 | * Alias for get_permalink |
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344 | * |
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345 | * @return string |
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346 | */ |
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347 | public function permalink() { |
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350 | |||
351 | /** |
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352 | * Returns post preview of requested length. |
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353 | * It will look for post_excerpt and will return it. |
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354 | * If post contains <!-- more --> tag it will return content until it |
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355 | * |
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356 | * @param integer $len Number of words. |
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357 | * @param boolean $force If is set to true it will cut your post_excerpt to desired $len length. |
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358 | * @param string $readmore The text for 'readmore' link. |
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359 | * @param boolean $strip Should we strip tags. |
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360 | * |
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361 | * @return string Post preview. |
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362 | */ |
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363 | public function get_preview( $len = 50, $force = false, $readmore = 'Read More', $strip = true ) { |
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442 | |||
443 | /** |
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444 | * Returns comments array |
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445 | * |
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446 | * @param string $status Comment status. |
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447 | * @param string $order Order for comments query. |
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448 | * |
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449 | * @return array |
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450 | */ |
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451 | public function get_comments( $status = 'approve', $order = 'DESC' ) { |
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482 | } |
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483 |
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.