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  | 
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| 8 | class Give_Updates { | 
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| 9 | |||
| 10 | /**  | 
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| 11 | * Instance.  | 
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| 12 | *  | 
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| 13 | * @since  | 
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| 14 | * @access static  | 
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| 15 | * @var  | 
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| 16 | */  | 
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| 17 | static private $instance;  | 
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| 18 | |||
| 19 | /**  | 
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| 20 | * Instance.  | 
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| 21 | *  | 
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| 22 | * @since  | 
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| 23 | * @access static  | 
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| 24 | * @var Give_Background_Updater  | 
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| 25 | */  | 
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| 26 | static private $background_updater;  | 
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| 27 | |||
| 28 | /**  | 
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| 29 | * Updates  | 
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| 30 | *  | 
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| 31 | * @since 1.8.12  | 
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| 32 | * @access private  | 
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| 33 | * @var array  | 
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| 34 | */  | 
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| 35 | private $updates = array();  | 
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| 36 | |||
| 37 | /**  | 
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| 38 | * Current update percentage number  | 
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| 39 | *  | 
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| 40 | * @since 1.8.12  | 
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| 41 | * @access private  | 
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| 42 | * @var array  | 
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| 43 | */  | 
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| 44 | public $percentage = 0;  | 
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| 45 | |||
| 46 | /**  | 
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| 47 | * Current update step number  | 
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| 48 | *  | 
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| 49 | * @since 1.8.12  | 
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| 50 | * @access private  | 
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| 51 | * @var array  | 
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| 52 | */  | 
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| 53 | public $step = 1;  | 
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| 54 | |||
| 55 | /**  | 
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| 56 | * Current update number  | 
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| 57 | *  | 
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| 58 | * @since 1.8.12  | 
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| 59 | * @access private  | 
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| 60 | * @var array  | 
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| 61 | */  | 
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| 62 | public $update = 1;  | 
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| 63 | |||
| 64 | /**  | 
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| 65 | * Singleton pattern.  | 
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| 66 | *  | 
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| 67 | * @since 1.8.12  | 
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| 68 | * @access private  | 
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| 69 | *  | 
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| 70 | * @param Give_Updates .  | 
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| 71 | */  | 
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| 72 | 	private function __construct() { | 
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| 74 | |||
| 75 | /**  | 
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| 76 | * Register updates  | 
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| 77 | *  | 
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| 78 | * @since 1.8.12  | 
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| 79 | * @access public  | 
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| 80 | *  | 
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| 81 | * @param array $args  | 
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| 82 | */  | 
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| 83 | 	public function register( $args ) { | 
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| 112 | |||
| 113 | /**  | 
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| 114 | * Get instance.  | 
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| 115 | *  | 
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| 116 | * @since  | 
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| 117 | * @access static  | 
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| 118 | * @return static  | 
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| 119 | */  | 
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| 120 | 	static function get_instance() { | 
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| 127 | |||
| 128 | /**  | 
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| 129 | *  | 
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| 130 | * Setup hook  | 
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| 131 | *  | 
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| 132 | * @since 1.8.12  | 
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| 133 | * @access public  | 
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| 134 | */  | 
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| 135 | 	public function setup() { | 
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| 159 | |||
| 160 | /**  | 
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| 161 | * Register plugin add-on updates.  | 
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| 162 | *  | 
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| 163 | * @since 1.8.12  | 
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| 164 | * @access public  | 
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| 165 | */  | 
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| 166 | 	public function __register_plugin_addon_updates() { | 
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| 178 | |||
| 179 | |||
| 180 | /**  | 
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| 181 | * Fire custom action hook to register updates  | 
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| 182 | *  | 
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| 183 | * @since 1.8.12  | 
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| 184 | * @access public  | 
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| 185 | */  | 
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| 186 | 	public function __register_upgrade() { | 
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| 198 | |||
| 199 | /**  | 
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| 200 | * Rename `Donations` menu title if updates exists  | 
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| 201 | *  | 
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| 202 | * @since 1.8.12  | 
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| 203 | * @access public  | 
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| 204 | */  | 
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| 205 | 	function __change_donations_label() { | 
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| 230 | |||
| 231 | /**  | 
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| 232 | * Register updates menu  | 
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| 233 | *  | 
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| 234 | * @since 1.8.12  | 
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| 235 | * @access public  | 
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| 236 | */  | 
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| 237 | 	public function __register_menu() { | 
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| 281 | |||
| 282 | |||
| 283 | /**  | 
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| 284 | * Show update related notices  | 
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| 285 | *  | 
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| 286 | * @since 2.0  | 
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| 287 | * @access public  | 
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| 288 | */  | 
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| 289 | 	public function __redirect_admin() { | 
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| 303 | |||
| 304 | |||
| 305 | /**  | 
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| 306 | * Show update related notices  | 
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| 307 | *  | 
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| 308 | * @since 2.0  | 
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| 309 | * @access public  | 
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| 310 | */  | 
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| 311 | 	public function __show_notice() { | 
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| 385 | |||
| 386 | /**  | 
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| 387 | * Render Give Updates Completed page  | 
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| 388 | *  | 
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| 389 | * @since 1.8.12  | 
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| 390 | * @access public  | 
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| 391 | */  | 
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| 392 | 	public function render_complete_page() { | 
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| 395 | |||
| 396 | /**  | 
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| 397 | * Render Give Updates page  | 
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| 398 | *  | 
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| 399 | * @since 1.8.12  | 
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| 400 | * @access public  | 
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| 401 | */  | 
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| 402 | 	public function render_page() { | 
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| 405 | |||
| 406 | /**  | 
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| 407 | * Run database upgrades  | 
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| 408 | *  | 
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| 409 | * @since 2.0  | 
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| 410 | * @access private  | 
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| 411 | */  | 
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| 412 | 	private function run_db_update() { | 
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| 437 | |||
| 438 | |||
| 439 | /**  | 
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| 440 | * Delete resume updates  | 
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| 441 | *  | 
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| 442 | * @since 1.8.12  | 
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| 443 | * @access public  | 
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| 444 | */  | 
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| 445 | 	public function __flush_resume_updates() { | 
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| 453 | |||
| 454 | |||
| 455 | /**  | 
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| 456 | * Initialize updates  | 
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| 457 | *  | 
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| 458 | * @since 2.0  | 
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| 459 | * @access public  | 
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| 460 | *  | 
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| 461 | * @return void  | 
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| 462 | */  | 
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| 463 | 	public function __give_start_updating() { | 
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| 482 | |||
| 483 | |||
| 484 | /**  | 
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| 485 | * This function handle ajax query for dn update status.  | 
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| 486 | *  | 
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| 487 | * @since 2.0  | 
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| 488 | * @access public  | 
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| 489 | *  | 
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| 490 | * @return string  | 
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| 491 | */  | 
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| 492 | 	public function __give_db_updates_info() { | 
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| 509 | |||
| 510 | /**  | 
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| 511 | * Send ajax response  | 
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| 512 | *  | 
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| 513 | * @since 1.8.12  | 
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| 514 | * @access public  | 
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| 515 | *  | 
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| 516 | * @param $data  | 
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| 517 | * @param string $type  | 
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| 518 | */  | 
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| 519 | 	public function send_ajax_response( $data, $type = '' ) { | 
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| 550 | |||
| 551 | /**  | 
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| 552 | * Set current update percentage.  | 
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| 553 | *  | 
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| 554 | * @since 1.8.12  | 
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| 555 | * @access public  | 
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| 556 | *  | 
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| 557 | * @param $total  | 
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| 558 | * @param $current_total  | 
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| 559 | */  | 
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| 560 | 	public function set_percentage( $total, $current_total ) { | 
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| 567 | |||
| 568 | /**  | 
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| 569 | * Check if parent update completed or not.  | 
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| 570 | *  | 
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| 571 | * @since 2.0  | 
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| 572 | * @access private  | 
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| 573 | *  | 
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| 574 | * @param array $update  | 
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| 575 | *  | 
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| 576 | * @return bool|null  | 
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| 577 | */  | 
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| 578 | 	public function is_parent_updates_completed( $update ) { | 
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| 601 | |||
| 602 | /**  | 
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| 603 | * Flag to check if DB updates running or not.  | 
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| 604 | *  | 
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| 605 | * @since 2.0  | 
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| 606 | * @access public  | 
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| 607 | * @return bool  | 
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| 608 | */  | 
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| 609 | 	public function is_doing_updates() { | 
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| 612 | |||
| 613 | |||
| 614 | /**  | 
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| 615 | * Check if update has valid dependency or not.  | 
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| 616 | *  | 
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| 617 | * @since 2.0  | 
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| 618 | * @access public  | 
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| 619 | *  | 
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| 620 | * @param $update  | 
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| 621 | *  | 
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| 622 | * @return bool  | 
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| 623 | */  | 
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| 624 | 	public function has_valid_dependency( $update ) { | 
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| 638 | |||
| 639 | /**  | 
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| 640 | * Get updates.  | 
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| 641 | *  | 
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| 642 | * @since 1.8.12  | 
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| 643 | * @access public  | 
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| 644 | *  | 
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| 645 | * @param string $update_type Tye of update.  | 
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| 646 | * @param string $status Tye of update.  | 
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| 647 | *  | 
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| 648 | * @return array  | 
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| 649 | */  | 
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| 650 | 	public function get_updates( $update_type = '', $status = 'all' ) { | 
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| 683 | |||
| 684 | /**  | 
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| 685 | * Get addon update count.  | 
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| 686 | *  | 
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| 687 | * @since 1.8.12  | 
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| 688 | * @access public  | 
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| 689 | * @return int  | 
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| 690 | */  | 
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| 691 | 	public function get_total_plugin_update_count() { | 
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| 694 | |||
| 695 | /**  | 
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| 696 | * Get total update count  | 
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| 697 | *  | 
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| 698 | * @since 1.8.12  | 
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| 699 | * @access public  | 
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| 700 | *  | 
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| 701 | * @return int  | 
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| 702 | */  | 
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| 703 | 	public function get_total_update_count() { | 
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| 709 | |||
| 710 | /**  | 
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| 711 | * Get total pending updates count  | 
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| 712 | *  | 
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| 713 | * @since 1.8.12  | 
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| 714 | * @access public  | 
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| 715 | *  | 
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| 716 | * @return int  | 
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| 717 | */  | 
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| 718 | 	public function get_pending_db_update_count() { | 
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| 721 | |||
| 722 | /**  | 
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| 723 | * Get total updates count  | 
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| 724 | *  | 
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| 725 | * @since 1.8.18  | 
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| 726 | * @access public  | 
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| 727 | *  | 
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| 728 | * @return int  | 
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| 729 | */  | 
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| 730 | 	public function get_total_db_update_count() { | 
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| 733 | |||
| 734 | /**  | 
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| 735 | * Get total new updates count  | 
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| 736 | *  | 
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| 737 | * @since 2.0  | 
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| 738 | * @access public  | 
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| 739 | *  | 
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| 740 | * @return int  | 
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| 741 | */  | 
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| 742 | 	public function get_total_new_db_update_count() { | 
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| 747 | |||
| 748 | /**  | 
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| 749 | * Get total new updates count  | 
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| 750 | *  | 
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| 751 | * @since 2.0  | 
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| 752 | * @access public  | 
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| 753 | *  | 
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| 754 | * @return int  | 
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| 755 | */  | 
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| 756 | 	public function get_running_db_update() { | 
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| 763 | |||
| 764 | /**  | 
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| 765 | * Get database update processing percentage.  | 
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| 766 | *  | 
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| 767 | * @since 2.0  | 
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| 768 | * @access public  | 
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| 769 | * @return float|int  | 
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| 770 | */  | 
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| 771 | 	public function get_db_update_processing_percentage() { | 
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| 791 | }  | 
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| 792 | |||
| 794 |