Complex classes like 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 Base, and based on these observations, apply Extract Interface, too.
1 | <?php |
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27 | class Base |
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28 | { |
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29 | |||
30 | /** |
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31 | * @deprecated use all-caps version |
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32 | */ |
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33 | // @codingStandardsIgnoreStart |
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34 | const header_prefix_for_ee = 'X-EE-'; |
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35 | // @codingStandardsIgnoreEnd |
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36 | |||
37 | const HEADER_PREFIX_FOR_EE = 'X-EE-'; |
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38 | |||
39 | /** |
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40 | * @deprecated use all-caps version instead |
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41 | */ |
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42 | // @codingStandardsIgnoreStart |
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43 | const header_prefix_for_wp = 'X-WP-'; |
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44 | // @codingStandardsIgnoreEnd |
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45 | |||
46 | const HEADER_PREFIX_FOR_WP = 'X-WP-'; |
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47 | |||
48 | /** |
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49 | * Contains debug info we'll send back in the response headers |
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50 | * |
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51 | * @var array |
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52 | */ |
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53 | protected $debug_info = array(); |
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54 | |||
55 | /** |
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56 | * Indicates whether or not the API is in debug mode |
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57 | * |
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58 | * @var boolean |
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59 | */ |
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60 | protected $debug_mode = false; |
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61 | |||
62 | /** |
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63 | * Indicates the version that was requested |
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64 | * |
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65 | * @var string |
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66 | */ |
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67 | protected $requested_version; |
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68 | |||
69 | /** |
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70 | * flat array of headers to send in the response |
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71 | * |
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72 | * @var array |
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73 | */ |
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74 | protected $response_headers = array(); |
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75 | |||
76 | |||
77 | |||
78 | public function __construct() |
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84 | |||
85 | |||
86 | |||
87 | /** |
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88 | * Sets the version the user requested |
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89 | * |
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90 | * @param string $version eg '4.8' |
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91 | */ |
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92 | public function setRequestedVersion($version) |
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96 | |||
97 | |||
98 | |||
99 | /** |
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100 | * Sets some debug info that we'll send back in headers |
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101 | * |
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102 | * @param string $key |
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103 | * @param string|array $info |
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104 | */ |
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105 | protected function setDebugInfo($key, $info) |
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109 | |||
110 | |||
111 | |||
112 | /** |
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113 | * Sets headers for the response |
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114 | * |
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115 | * @param string $header_key , excluding the "X-EE-" part |
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116 | * @param array|string $value if an array, multiple headers will be added, one |
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117 | * for each key in the array |
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118 | * @param boolean $use_ee_prefix whether to use the EE prefix on the header, or fallback to |
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119 | * the standard WP one |
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120 | */ |
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121 | protected function setResponseHeader($header_key, $value, $use_ee_prefix = true) |
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132 | |||
133 | |||
134 | |||
135 | /** |
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136 | * Returns a flat array of headers to be added to the response |
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137 | * |
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138 | * @return array |
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139 | */ |
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140 | protected function getResponseHeaders() |
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149 | |||
150 | |||
151 | |||
152 | /** |
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153 | * Adds error notices from EE_Error onto the provided \WP_Error |
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154 | * |
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155 | * @param WP_Error $wp_error_response |
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156 | * @return WP_Error |
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157 | */ |
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158 | protected function addEeErrorsToResponse(WP_Error $wp_error_response) |
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171 | |||
172 | |||
173 | |||
174 | /** |
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175 | * Sends a response, but also makes sure to attach headers that |
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176 | * are handy for debugging. |
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177 | * Specifically, we assume folks will want to know what exactly was the DB query that got run, |
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178 | * what exactly was the Models query that got run, what capabilities came into play, what fields were omitted from |
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179 | * the response, others? |
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180 | * |
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181 | * @param array|WP_Error|Exception|RestException $response |
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182 | * @return WP_REST_Response |
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183 | */ |
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184 | public function sendResponse($response) |
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216 | |||
217 | |||
218 | |||
219 | /** |
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220 | * Converts the \WP_Error into `WP_REST_Response. |
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221 | * Mostly this is just a copy-and-paste from \WP_REST_Server::error_to_response |
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222 | * (which is protected) |
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223 | * |
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224 | * @param WP_Error $wp_error |
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225 | * @return WP_REST_Response |
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226 | */ |
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227 | protected function createRestResponseFromWpError(WP_Error $wp_error) |
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253 | |||
254 | |||
255 | |||
256 | /** |
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257 | * Array of headers derived from EE success, attention, and error messages |
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258 | * |
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259 | * @return array |
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260 | */ |
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261 | protected function getHeadersFromEeNotices() |
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284 | |||
285 | |||
286 | |||
287 | /** |
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288 | * Finds which version of the API was requested given the route, and returns it. |
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289 | * eg in a request to "mysite.com/wp-json/ee/v4.8.29/events/123" this would return |
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290 | * "4.8.29". |
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291 | * We should know hte requested version in this model though, so if no route is |
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292 | * provided just use what we set earlier |
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293 | * |
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294 | * @param string $route |
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295 | * @return string |
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296 | */ |
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297 | public function getRequestedVersion($route = null) |
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313 | |||
314 | |||
315 | |||
316 | /** |
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317 | * Applies the regex to the route, then creates an array using the values of |
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318 | * $match_keys as keys (but ignores the full pattern match). Returns the array of matches. |
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319 | * For example, if you call |
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320 | * parse_route( '/ee/v4.8/events', '~\/ee\/v([^/]*)\/(.*)~', array( 'version', 'model' ) ) |
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321 | * it will return array( 'version' => '4.8', 'model' => 'events' ) |
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322 | * |
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323 | * @param string $route |
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324 | * @param string $regex |
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325 | * @param array $match_keys EXCLUDING matching the entire regex |
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326 | * @return array where $match_keys are the keys (the first value of $match_keys |
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327 | * becomes the first key of the return value, etc. Eg passing in $match_keys of |
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328 | * array( 'model', 'id' ), will, if the regex is successful, will return |
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329 | * array( 'model' => 'foo', 'id' => 'bar' ) |
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330 | * @throws EE_Error if it couldn't be parsed |
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331 | */ |
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332 | public function parseRoute($route, $regex, $match_keys) |
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354 | |||
355 | |||
356 | |||
357 | /** |
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358 | * Gets the body's params (either from JSON or parsed body), which EXCLUDES the GET params and URL params |
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359 | * |
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360 | * @param \WP_REST_Request $request |
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361 | * @return array |
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362 | */ |
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363 | protected function getBodyParams(\WP_REST_Request $request) |
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376 | } |
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377 | |||
379 |