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 Give_Updates 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 Give_Updates, and based on these observations, apply Extract Interface, too.
| 1 | <?php | ||
| 7 | class Give_Updates { | ||
|  | |||
| 8 | |||
| 9 | /** | ||
| 10 | * Instance. | ||
| 11 | * | ||
| 12 | * @since | ||
| 13 | * @access static | ||
| 14 | * @var | ||
| 15 | */ | ||
| 16 | static private $instance; | ||
| 17 | |||
| 18 | /** | ||
| 19 | * Updates | ||
| 20 | * | ||
| 21 | * @since 1.8.12 | ||
| 22 | * @access private | ||
| 23 | * @var array | ||
| 24 | */ | ||
| 25 | private $updates = array(); | ||
| 26 | |||
| 27 | /** | ||
| 28 | * Current update percentage number | ||
| 29 | * | ||
| 30 | * @since 1.8.12 | ||
| 31 | * @access private | ||
| 32 | * @var array | ||
| 33 | */ | ||
| 34 | public $percentage = 0; | ||
| 35 | |||
| 36 | /** | ||
| 37 | * Current update step number | ||
| 38 | * | ||
| 39 | * @since 1.8.12 | ||
| 40 | * @access private | ||
| 41 | * @var array | ||
| 42 | */ | ||
| 43 | public $step = 1; | ||
| 44 | |||
| 45 | /** | ||
| 46 | * Current update number | ||
| 47 | * | ||
| 48 | * @since 1.8.12 | ||
| 49 | * @access private | ||
| 50 | * @var array | ||
| 51 | */ | ||
| 52 | public $update = 1; | ||
| 53 | |||
| 54 | /** | ||
| 55 | * Singleton pattern. | ||
| 56 | * | ||
| 57 | * @since 1.8.12 | ||
| 58 | * @access private | ||
| 59 | * | ||
| 60 | * @param Give_Updates . | ||
| 61 | */ | ||
| 62 | 	private function __construct() { | ||
| 64 | |||
| 65 | /** | ||
| 66 | * Register updates | ||
| 67 | * | ||
| 68 | * @since 1.8.12 | ||
| 69 | * @access public | ||
| 70 | * | ||
| 71 | * @param array $args | ||
| 72 | */ | ||
| 73 | 	public function register( $args ) { | ||
| 92 | |||
| 93 | |||
| 94 | /** | ||
| 95 | * Get updates. | ||
| 96 | * | ||
| 97 | * @since 1.8.12 | ||
| 98 | * @access public | ||
| 99 | * | ||
| 100 | * @param string $update_type Tye of update. | ||
| 101 | * @param string $status Tye of update. | ||
| 102 | * | ||
| 103 | * @return array | ||
| 104 | */ | ||
| 105 | 	public function get_updates( $update_type = '', $status = 'all' ) { | ||
| 138 | |||
| 139 | /** | ||
| 140 | * Get instance. | ||
| 141 | * | ||
| 142 | * @since | ||
| 143 | * @access static | ||
| 144 | * @return static | ||
| 145 | */ | ||
| 146 | 	static function get_instance() { | ||
| 153 | |||
| 154 | /** | ||
| 155 | * | ||
| 156 | * Setup hook | ||
| 157 | * | ||
| 158 | * @since 1.8.12 | ||
| 159 | * @access public | ||
| 160 | */ | ||
| 161 | 	public function setup() { | ||
| 176 | |||
| 177 | /** | ||
| 178 | * Register plugin add-on updates. | ||
| 179 | * | ||
| 180 | * @since 1.8.12 | ||
| 181 | * @access public | ||
| 182 | */ | ||
| 183 | 	public function __register_plugin_addon_updates() { | ||
| 195 | |||
| 196 | |||
| 197 | /** | ||
| 198 | * Fire custom action hook to register updates | ||
| 199 | * | ||
| 200 | * @since 1.8.12 | ||
| 201 | * @access public | ||
| 202 | */ | ||
| 203 | 	public function __register_upgrade() { | ||
| 215 | |||
| 216 | /** | ||
| 217 | * Rename `Donations` menu title if updates exists | ||
| 218 | * | ||
| 219 | * @since 1.8.12 | ||
| 220 | * @access public | ||
| 221 | */ | ||
| 222 | 	function __change_donations_label() { | ||
| 244 | |||
| 245 | /** | ||
| 246 | * Register updates menu | ||
| 247 | * | ||
| 248 | * @since 1.8.12 | ||
| 249 | * @access public | ||
| 250 | */ | ||
| 251 | 	public function __register_menu() { | ||
| 288 | |||
| 289 | /** | ||
| 290 | * Get total updates count | ||
| 291 | * | ||
| 292 | * @since 1.8.12 | ||
| 293 | * @access public | ||
| 294 | * @return int | ||
| 295 | */ | ||
| 296 | 	public function get_db_update_count() { | ||
| 299 | |||
| 300 | /** | ||
| 301 | * Render Give Updates Completed page | ||
| 302 | * | ||
| 303 | * @since 1.8.12 | ||
| 304 | * @access public | ||
| 305 | */ | ||
| 306 | 	public function render_complete_page() { | ||
| 309 | |||
| 310 | /** | ||
| 311 | * Render Give Updates page | ||
| 312 | * | ||
| 313 | * @since 1.8.12 | ||
| 314 | * @access public | ||
| 315 | */ | ||
| 316 | 	public function render_page() { | ||
| 319 | |||
| 320 | /** | ||
| 321 | * Get addon update count. | ||
| 322 | * | ||
| 323 | * @since 1.8.12 | ||
| 324 | * @access public | ||
| 325 | * @return int | ||
| 326 | */ | ||
| 327 | 	public function get_plugin_update_count() { | ||
| 330 | |||
| 331 | /** | ||
| 332 | * Get total update count | ||
| 333 | * | ||
| 334 | * @since 1.8.12 | ||
| 335 | * @access public | ||
| 336 | * | ||
| 337 | * @return int | ||
| 338 | */ | ||
| 339 | 	public function get_update_count() { | ||
| 345 | |||
| 346 | |||
| 347 | /** | ||
| 348 | * Delete resume updates | ||
| 349 | * | ||
| 350 | * @since 1.8.12 | ||
| 351 | * @access public | ||
| 352 | */ | ||
| 353 | 	public function __flush_resume_updates() { | ||
| 361 | |||
| 362 | /** | ||
| 363 | * Process give updates. | ||
| 364 | * | ||
| 365 | * @since 1.8.12 | ||
| 366 | * @access public | ||
| 367 | */ | ||
| 368 | 	public function __give_ajax_updates() { | ||
| 458 | |||
| 459 | /** | ||
| 460 | * Send ajax response | ||
| 461 | * | ||
| 462 | * @since 1.8.12 | ||
| 463 | * @access public | ||
| 464 | * | ||
| 465 | * @param $data | ||
| 466 | * @param string $type | ||
| 467 | */ | ||
| 468 | 	public function send_ajax_response( $data, $type = '' ) { | ||
| 496 | |||
| 497 | |||
| 498 | /** | ||
| 499 | * Resume updates | ||
| 500 | * | ||
| 501 | * @since 1.8.12 | ||
| 502 | * @access public | ||
| 503 | * | ||
| 504 | * @return bool|int | ||
| 505 | */ | ||
| 506 | 	public function resume_updates() { | ||
| 515 | |||
| 516 | |||
| 517 | /** | ||
| 518 | * Set current update percentage. | ||
| 519 | * | ||
| 520 | * @since 1.8.12 | ||
| 521 | * @access public | ||
| 522 | * | ||
| 523 | * @param $total | ||
| 524 | * @param $current_total | ||
| 525 | */ | ||
| 526 | 	public function set_percentage( $total, $current_total ) { | ||
| 533 | } | ||
| 534 | |||
| 536 |