Complex classes like Plugin 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 Plugin, and based on these observations, apply Extract Interface, too.
1 | <?php |
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18 | final class Plugin { |
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19 | |||
20 | /** |
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21 | * @since 2.0 |
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22 | * @api |
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23 | * @var string The plugin version. |
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24 | * |
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25 | */ |
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26 | public static $version = GV_PLUGIN_VERSION; |
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27 | |||
28 | /** |
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29 | * @var string Minimum WordPress version. |
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30 | * |
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31 | * GravityView requires at least this version of WordPress to function properly. |
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32 | */ |
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33 | private static $min_wp_version = GV_MIN_WP_VERSION; |
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34 | |||
35 | /** |
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36 | * @var string Minimum Gravity Forms version. |
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37 | * |
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38 | * GravityView requires at least this version of Gravity Forms to function properly. |
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39 | */ |
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40 | public static $min_gf_version = GV_MIN_GF_VERSION; |
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41 | |||
42 | /** |
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43 | * @var string Minimum PHP version. |
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44 | * |
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45 | * GravityView requires at least this version of PHP to function properly. |
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46 | */ |
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47 | private static $min_php_version = GV_MIN_PHP_VERSION; |
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48 | |||
49 | /** |
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50 | * @var string|bool Minimum future PHP version. |
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51 | * |
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52 | * GravityView will require this version of PHP soon. False if no future PHP version changes are planned. |
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53 | */ |
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54 | private static $future_min_php_version = GV_FUTURE_MIN_PHP_VERSION; |
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55 | |||
56 | /** |
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57 | * @var string|bool Minimum future Gravity Forms version. |
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58 | * |
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59 | * GravityView will require this version of Gravity Forms soon. False if no future Gravity Forms version changes are planned. |
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60 | */ |
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61 | private static $future_min_gf_version = GV_FUTURE_MIN_GF_VERSION; |
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62 | |||
63 | /** |
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64 | * @var \GV\Plugin The \GV\Plugin static instance. |
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65 | */ |
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66 | private static $__instance = null; |
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67 | |||
68 | /** |
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69 | * @since 2.0 |
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70 | * @api |
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71 | * @var \GV\Addon_Settings The plugin "addon" settings. |
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72 | * |
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73 | */ |
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74 | public $settings; |
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75 | |||
76 | /** |
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77 | * @var string The GFQuery functionality identifier. |
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78 | */ |
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79 | const FEATURE_GFQUERY = 'gfquery'; |
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80 | |||
81 | /** |
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82 | * @var string The joins functionality identifier. |
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83 | */ |
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84 | const FEATURE_JOINS = 'joins'; |
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85 | |||
86 | /** |
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87 | * @var string The unions functionality identifier. |
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88 | */ |
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89 | const FEATURE_UNIONS = 'unions'; |
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90 | |||
91 | /** |
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92 | * @var string The REST API functionality identifier. |
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93 | */ |
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94 | const FEATURE_REST = 'rest_api'; |
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95 | |||
96 | /** |
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97 | * Get the global instance of \GV\Plugin. |
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98 | * |
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99 | * @return \GV\Plugin The global instance of GravityView Plugin. |
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100 | */ |
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101 | public static function get() { |
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109 | |||
110 | private function __construct() { |
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127 | |||
128 | public function load_license_settings() { |
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139 | |||
140 | 1 | /** |
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141 | * Check whether Gravity Forms is v2.5-beta or newer |
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142 | 1 | * |
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143 | * @return bool |
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144 | 1 | * @todo add @since |
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145 | * |
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146 | */ |
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147 | public function is_GF_25() { |
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151 | |||
152 | /** |
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153 | * Check whether GravityView `is network activated. |
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154 | * |
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155 | * @return bool Whether it's network activated or not. |
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156 | */ |
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157 | public static function is_network_activated() { |
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163 | |||
164 | /** |
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165 | * Include more legacy stuff. |
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166 | * |
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167 | * @param boolean $force Whether to force the includes. |
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168 | * |
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169 | * @return void |
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170 | */ |
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171 | public function include_legacy_frontend( $force = false ) { |
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192 | |||
193 | /** |
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194 | * Load more legacy core files. |
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195 | * |
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196 | * @return void |
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197 | */ |
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198 | public function include_legacy_core() { |
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260 | |||
261 | /** |
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262 | * Load the translations. |
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263 | * |
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264 | * Order of look-ups: |
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265 | * |
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266 | * 1. /wp-content/languages/plugins/gravityview-{locale}.mo (loaded by WordPress Core) |
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267 | * 2. /wp-content/mu-plugins/gravityview-{locale}.mo |
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268 | * 3. /wp-content/mu-plugins/languages/gravityview-{locale}.mo |
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269 | * 4. /wp-content/plugins/gravityview/languages/gravityview-{locale}.mo |
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270 | * |
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271 | * @return void |
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272 | */ |
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273 | public function load_textdomain() { |
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309 | |||
310 | /** |
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311 | * Register hooks that are fired when the plugin is activated and deactivated. |
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312 | 1 | * |
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313 | 1 | * @return void |
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314 | */ |
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315 | public function register_activation_hooks() { |
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320 | 1 | ||
321 | /** |
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322 | 1 | * Plugin activation function. |
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323 | * |
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324 | * @return void |
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325 | 1 | * @internal |
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326 | */ |
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327 | public function activate() { |
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356 | |||
357 | /** |
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358 | * Plugin deactivation function. |
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359 | * |
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360 | * @return void |
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361 | * @internal |
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362 | */ |
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363 | public function deactivate() { |
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367 | 1 | ||
368 | /** |
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369 | 1 | * Retrieve an absolute path within the GravityView plugin directory. |
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370 | * |
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371 | * @since 2.0 |
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372 | * |
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373 | * @param string $path Optional. Append this extra path component. |
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374 | * @return string The absolute path to the plugin directory. |
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375 | * @api |
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376 | */ |
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377 | public function dir( $path = '' ) { |
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381 | 1 | ||
382 | 1 | /** |
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383 | * Retrieve a relative path to the GravityView plugin directory from the WordPress plugin directory |
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384 | * |
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385 | * @since 2.2.3 |
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386 | * |
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387 | * @param string $path Optional. Append this extra path component. |
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388 | * @return string The relative path to the plugin directory from the plugin directory. |
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389 | * @api |
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390 | */ |
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391 | public function relpath( $path = '' ) { |
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397 | 5 | ||
398 | /** |
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399 | * Retrieve a URL within the GravityView plugin directory. |
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400 | * |
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401 | * @since 2.0 |
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402 | * |
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403 | * @param string $path Optional. Extra path appended to the URL. |
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404 | * @return string The URL to this plugin, with trailing slash. |
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405 | * @api |
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406 | */ |
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407 | public function url( $path = '/' ) { |
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411 | |||
412 | /** |
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413 | * Is everything compatible with this version of GravityView? |
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414 | * |
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415 | * @since 2.0 |
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416 | * |
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417 | * @return bool |
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418 | * @api |
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419 | */ |
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420 | public function is_compatible() { |
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427 | |||
428 | /** |
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429 | * Is this version of GravityView compatible with the current version of PHP? |
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430 | * |
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431 | * @since 2.0 |
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432 | * |
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433 | * @return bool true if compatible, false otherwise. |
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434 | 5 | * @api |
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435 | */ |
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436 | 5 | public function is_compatible_php() { |
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440 | 5 | ||
441 | /** |
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442 | * Is this version of GravityView compatible with the future required version of PHP? |
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443 | * |
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444 | * @since 2.0 |
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445 | * |
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446 | * @return bool true if compatible, false otherwise. |
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447 | * @api |
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448 | */ |
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449 | public function is_compatible_future_php() { |
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453 | 5 | ||
454 | /** |
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455 | * Is this version of GravityView compatible with the current version of WordPress? |
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456 | * |
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457 | * @since 2.0 |
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458 | * |
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459 | * @param string $version Version to check against; otherwise uses GV_MIN_WP_VERSION |
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460 | * |
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461 | * @return bool true if compatible, false otherwise. |
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462 | * @api |
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463 | */ |
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464 | public function is_compatible_wordpress( $version = null ) { |
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472 | |||
473 | /** |
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474 | * Is this version of GravityView compatible with the current version of Gravity Forms? |
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475 | * |
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476 | 4 | * @since 2.0 |
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477 | 4 | * |
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478 | 4 | * @return bool true if compatible, false otherwise (or not active/installed). |
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479 | * @api |
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480 | */ |
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481 | public function is_compatible_gravityforms() { |
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487 | |||
488 | 4 | /** |
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489 | 4 | * Is this version of GravityView compatible with the future version of Gravity Forms? |
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490 | 4 | * |
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491 | * @since 2.0 |
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492 | * |
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493 | * @return bool true if compatible, false otherwise (or not active/installed). |
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494 | * @api |
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495 | */ |
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496 | public function is_compatible_future_gravityforms() { |
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502 | |||
503 | /** |
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504 | * Retrieve the current PHP version. |
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505 | * |
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506 | 4 | * Overridable with GRAVITYVIEW_TESTS_PHP_VERSION_OVERRIDE during testing. |
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507 | 4 | * |
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508 | * @return string The version of PHP. |
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509 | */ |
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510 | private function get_php_version() { |
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515 | |||
516 | /** |
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517 | 194 | * Retrieve the current WordPress version. |
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518 | 194 | * |
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519 | * Overridable with GRAVITYVIEW_TESTS_WP_VERSION_OVERRIDE during testing. |
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520 | * |
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521 | * @return string The version of WordPress. |
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522 | */ |
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523 | 194 | private function get_wordpress_version() { |
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528 | 194 | ||
529 | 194 | /** |
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530 | * Retrieve the current Gravity Forms version. |
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531 | * |
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532 | * Overridable with GRAVITYVIEW_TESTS_GF_VERSION_OVERRIDE during testing. |
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533 | * |
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534 | * @return string|null The version of Gravity Forms or null if inactive. |
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535 | */ |
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536 | private function get_gravityforms_version() { |
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547 | |||
548 | /** |
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549 | * Feature support detection. |
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550 | * |
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551 | * @param string $feature Feature name. Check FEATURE_* class constants. |
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552 | * |
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553 | * @return boolean |
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554 | */ |
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555 | public function supports( $feature ) { |
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573 | |||
574 | /** |
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575 | * Delete GravityView Views, settings, roles, caps, etc. |
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576 | * |
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577 | * @return void |
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578 | */ |
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579 | public function uninstall() { |
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664 | |||
665 | private function __clone() { |
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667 | |||
668 | private function __wakeup() { |
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670 | } |
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671 |
In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: