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 Writing_On_GitHub 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 Writing_On_GitHub, and based on these observations, apply Extract Interface, too.
1 | <?php |
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45 | class Writing_On_GitHub { |
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46 | |||
47 | /** |
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48 | * Object instance |
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49 | * @var self |
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50 | */ |
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51 | public static $instance; |
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52 | |||
53 | /** |
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54 | * Language text domain |
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55 | * @var string |
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56 | */ |
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57 | public static $text_domain = 'writing-on-github'; |
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58 | |||
59 | /** |
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60 | * Controller object |
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61 | * @var Writing_On_GitHub_Controller |
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62 | */ |
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63 | public $controller; |
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64 | |||
65 | /** |
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66 | * Controller object |
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67 | * @var Writing_On_GitHub_Admin |
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68 | */ |
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69 | public $admin; |
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70 | |||
71 | /** |
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72 | * CLI object. |
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73 | * |
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74 | * @var Writing_On_GitHub_CLI |
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75 | */ |
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76 | protected $cli; |
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77 | |||
78 | /** |
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79 | * Request object. |
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80 | * |
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81 | * @var Writing_On_GitHub_Request |
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82 | */ |
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83 | protected $request; |
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84 | |||
85 | /** |
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86 | * Response object. |
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87 | * |
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88 | * @var Writing_On_GitHub_Response |
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89 | */ |
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90 | protected $response; |
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91 | |||
92 | /** |
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93 | * Api object. |
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94 | * |
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95 | * @var Writing_On_GitHub_Api |
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96 | */ |
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97 | protected $api; |
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98 | |||
99 | /** |
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100 | * Import object. |
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101 | * |
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102 | * @var Writing_On_GitHub_Import |
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103 | */ |
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104 | protected $import; |
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105 | |||
106 | /** |
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107 | * Export object. |
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108 | * |
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109 | * @var Writing_On_GitHub_Export |
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110 | */ |
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111 | protected $export; |
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112 | |||
113 | /** |
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114 | * Semaphore object. |
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115 | * |
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116 | * @var Writing_On_GitHub_Semaphore |
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117 | */ |
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118 | protected $semaphore; |
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119 | |||
120 | /** |
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121 | * Database object. |
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122 | * |
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123 | * @var Writing_On_GitHub_Database |
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124 | */ |
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125 | protected $database; |
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126 | |||
127 | /** |
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128 | * Called at load time, hooks into WP core |
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129 | */ |
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130 | public function __construct() { |
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143 | |||
144 | /** |
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145 | * Attaches the plugin's hooks into WordPress. |
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146 | */ |
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147 | public function boot() { |
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167 | |||
168 | public function edit_post_link($link, $postID, $context) { |
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178 | |||
179 | public function ignore_post_meta($meta) { |
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201 | |||
202 | public function the_content($content) { |
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225 | |||
226 | /** |
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227 | * Init i18n files |
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228 | */ |
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229 | public function l10n() { |
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232 | |||
233 | /** |
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234 | * Sets and kicks off the export cronjob |
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235 | */ |
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236 | public function start_export( $force = false ) { |
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239 | |||
240 | /** |
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241 | * Sets and kicks off the import cronjob |
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242 | */ |
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243 | public function start_import() { |
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246 | |||
247 | /** |
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248 | * Enables the admin notice on initial activation |
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249 | */ |
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250 | public function activate() { |
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255 | |||
256 | /** |
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257 | * Displays the activation admin notice |
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258 | */ |
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259 | public function activation_notice() { |
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277 | |||
278 | /** |
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279 | * Get the Controller object. |
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280 | * |
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281 | * @return Writing_On_GitHub_Controller |
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282 | */ |
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283 | public function controller() { |
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286 | |||
287 | /** |
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288 | * Lazy-load the CLI object. |
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289 | * |
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290 | * @return Writing_On_GitHub_CLI |
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291 | */ |
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292 | public function cli() { |
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299 | |||
300 | /** |
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301 | * Lazy-load the Request object. |
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302 | * |
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303 | * @return Writing_On_GitHub_Request |
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304 | */ |
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305 | public function request() { |
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312 | |||
313 | /** |
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314 | * Lazy-load the Response object. |
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315 | * |
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316 | * @return Writing_On_GitHub_Response |
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317 | */ |
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318 | public function response() { |
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325 | |||
326 | /** |
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327 | * Lazy-load the Api object. |
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328 | * |
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329 | * @return Writing_On_GitHub_Api |
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330 | */ |
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331 | public function api() { |
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338 | |||
339 | /** |
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340 | * Lazy-load the Import object. |
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341 | * |
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342 | * @return Writing_On_GitHub_Import |
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343 | */ |
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344 | public function import() { |
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351 | |||
352 | /** |
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353 | * Lazy-load the Export object. |
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354 | * |
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355 | * @return Writing_On_GitHub_Export |
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356 | */ |
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357 | public function export() { |
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364 | |||
365 | /** |
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366 | * Lazy-load the Semaphore object. |
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367 | * |
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368 | * @return Writing_On_GitHub_Semaphore |
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369 | */ |
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370 | public function semaphore() { |
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377 | |||
378 | /** |
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379 | * Lazy-load the Database object. |
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380 | * |
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381 | * @return Writing_On_GitHub_Database |
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382 | */ |
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383 | public function database() { |
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390 | |||
391 | /** |
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392 | * Print to WP_CLI if in CLI environment or |
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393 | * write to debug.log if WP_DEBUG is enabled |
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394 | * @source http://www.stumiller.me/sending-output-to-the-wordpress-debug-log/ |
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395 | * |
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396 | * @param mixed $msg |
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397 | * @param string $write |
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398 | */ |
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399 | public static function write_log( $msg, $write = 'line' ) { |
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414 | |||
415 | /** |
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416 | * Kicks of an import or export cronjob. |
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417 | * |
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418 | * @param bool $force |
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419 | * @param string $type |
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420 | */ |
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421 | protected function start_cron( $type, $force = false ) { |
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427 | } |
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428 |