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 Jetpack_React_Page 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 Jetpack_React_Page, and based on these observations, apply Extract Interface, too.
| 1 | <?php | ||
| 5 | class Jetpack_React_Page extends Jetpack_Admin_Page { | ||
| 6 | |||
| 7 | protected $dont_show_if_not_active = false; | ||
| 8 | |||
| 9 | protected $is_redirecting = false; | ||
| 10 | |||
| 11 | 	function get_page_hook() { | ||
| 17 | |||
| 18 | 	function add_page_actions( $hook ) { | ||
| 19 | /** This action is documented in class.jetpack.php */ | ||
| 20 | do_action( 'jetpack_admin_menu', $hook ); | ||
| 21 | |||
| 22 | // Place the Jetpack menu item on top and others in the order they appear | ||
| 23 | add_filter( 'custom_menu_order', '__return_true' ); | ||
| 24 | add_filter( 'menu_order', array( $this, 'jetpack_menu_order' ) ); | ||
| 25 | |||
| 26 | 		if ( ! isset( $_GET['page'] ) || 'jetpack' !== $_GET['page'] || ! empty( $_GET['configure'] ) ) { | ||
| 27 | return; // No need to handle the fallback redirection if we are not on the Jetpack page | ||
| 28 | } | ||
| 29 | |||
| 30 | // Adding a redirect meta tag for older WordPress versions | ||
| 31 | 		if ( $this->is_wp_version_too_old() ) { | ||
| 32 | $this->is_redirecting = true; | ||
| 33 | add_action( 'admin_head', array( $this, 'add_fallback_head_meta' ) ); | ||
| 34 | } | ||
| 35 | |||
| 36 | // Adding a redirect meta tag wrapped in noscript tags for all browsers in case they have JavaScript disabled | ||
| 37 | add_action( 'admin_head', array( $this, 'add_noscript_head_meta' ) ); | ||
| 38 | |||
| 39 | // Adding a redirect tag wrapped in browser conditional comments | ||
| 40 | add_action( 'admin_head', array( $this, 'add_legacy_browsers_head_script' ) ); | ||
| 41 | } | ||
| 42 | |||
| 43 | /** | ||
| 44 | * Add Jetpack Dashboard sub-link and point it to AAG if the user can view stats, manage modules or if Protect is active. | ||
| 45 | * Otherwise and only if user is allowed to see the Jetpack Admin, the Dashboard sub-link is added but pointed to Apps tab. | ||
| 46 | * | ||
| 47 | * Works in Dev Mode or when user is connected. | ||
| 48 | * | ||
| 49 | * @since 4.3.0 | ||
| 50 | */ | ||
| 51 | 	function jetpack_add_dashboard_sub_nav_item() { | ||
| 52 | 		if ( Jetpack::is_development_mode() || Jetpack::is_active() ) { | ||
| 53 | global $submenu; | ||
| 54 | 			if ( current_user_can( 'jetpack_manage_modules' ) || Jetpack::is_module_active( 'protect' ) || current_user_can( 'view_stats' ) ) { | ||
| 55 | $submenu['jetpack'][] = array( __( 'Dashboard', 'jetpack' ), 'jetpack_admin_page', Jetpack::admin_url( 'page=jetpack#/dashboard' ) ); | ||
| 56 | 			} elseif ( current_user_can( 'jetpack_admin_page' ) ) { | ||
| 57 | $submenu['jetpack'][] = array( __( 'Dashboard', 'jetpack' ), 'jetpack_admin_page', Jetpack::admin_url( 'page=jetpack#/apps' ) ); | ||
| 58 | } | ||
| 59 | } | ||
| 60 | } | ||
| 61 | |||
| 62 | /** | ||
| 63 | * If user is allowed to see the Jetpack Admin, add Settings sub-link. | ||
| 64 | * | ||
| 65 | * @since 4.3.0 | ||
| 66 | */ | ||
| 67 | 	function jetpack_add_settings_sub_nav_item() { | ||
| 68 | 		if ( ( Jetpack::is_development_mode() || Jetpack::is_active() ) && current_user_can( 'jetpack_admin_page' ) ) { | ||
| 69 | global $submenu; | ||
| 70 | $submenu['jetpack'][] = array( __( 'Settings', 'jetpack' ), 'jetpack_admin_page', Jetpack::admin_url( 'page=jetpack#/settings' ) ); | ||
| 71 | } | ||
| 72 | } | ||
| 73 | |||
| 74 | 	function add_fallback_head_meta() { | ||
| 75 | echo '<meta http-equiv="refresh" content="0; url=?page=jetpack_modules">'; | ||
| 76 | } | ||
| 77 | |||
| 78 | 	function add_noscript_head_meta() { | ||
| 79 | echo '<noscript>'; | ||
| 80 | $this->add_fallback_head_meta(); | ||
| 81 | echo '</noscript>'; | ||
| 82 | } | ||
| 83 | |||
| 84 | 	function add_legacy_browsers_head_script() { | ||
| 85 | echo | ||
| 86 | "<script type=\"text/javascript\">\n" | ||
| 87 | . "/*@cc_on\n" | ||
| 88 | 			. "if ( @_jscript_version <= 10) {\n" | ||
| 89 | . "window.location.href = '?page=jetpack_modules';\n" | ||
| 90 | . "}\n" | ||
| 91 | . "@*/\n" | ||
| 92 | . "</script>"; | ||
| 93 | } | ||
| 94 | |||
| 95 | View Code Duplication | 	function jetpack_menu_order( $menu_order ) { | |
| 96 | $jp_menu_order = array(); | ||
| 97 | |||
| 98 | 		foreach ( $menu_order as $index => $item ) { | ||
| 99 | if ( $item != 'jetpack' ) | ||
| 100 | $jp_menu_order[] = $item; | ||
| 101 | |||
| 102 | if ( $index == 0 ) | ||
| 103 | $jp_menu_order[] = 'jetpack'; | ||
| 104 | } | ||
| 105 | |||
| 106 | return $jp_menu_order; | ||
| 107 | } | ||
| 108 | |||
| 109 | // Render the configuration page for the module if it exists and an error | ||
| 110 | // screen if the module is not configurable | ||
| 111 | // @todo remove when real settings are in place | ||
|  | |||
| 112 | 	function render_nojs_configurable( $module_name ) { | ||
| 113 | $module_name = preg_replace( '/[^\da-z\-]+/', '', $_GET['configure'] ); | ||
| 114 | |||
| 115 | include_once( JETPACK__PLUGIN_DIR . '_inc/header.php' ); | ||
| 116 | echo '<div class="wrap configure-module">'; | ||
| 117 | |||
| 118 | 		if ( Jetpack::is_module( $module_name ) && current_user_can( 'jetpack_configure_modules' ) ) { | ||
| 119 | Jetpack::admin_screen_configure_module( $module_name ); | ||
| 120 | 		} else { | ||
| 121 | echo '<h2>' . esc_html__( 'Error, bad module.', 'jetpack' ) . '</h2>'; | ||
| 122 | } | ||
| 123 | |||
| 124 | echo '</div><!-- /wrap -->'; | ||
| 125 | } | ||
| 126 | |||
| 127 | 	function page_render() { | ||
| 128 | // Handle redirects to configuration pages | ||
| 129 | 		if ( ! empty( $_GET['configure'] ) ) { | ||
| 130 | return $this->render_nojs_configurable( $_GET['configure'] ); | ||
| 131 | } | ||
| 132 | |||
| 133 | /** This action is already documented in views/admin/admin-page.php */ | ||
| 134 | do_action( 'jetpack_notices' ); | ||
| 135 | |||
| 136 | // Try fetching by patch | ||
| 137 | $static_html = @file_get_contents( JETPACK__PLUGIN_DIR . '_inc/build/static.html' ); | ||
| 138 | |||
| 139 | 		if ( false === $static_html ) { | ||
| 140 | |||
| 141 | // If we still have nothing, display an error | ||
| 142 | esc_html_e( 'Error fetching static.html.', 'jetpack' ); | ||
| 143 | 		} else { | ||
| 144 | |||
| 145 | // We got the static.html so let's display it | ||
| 146 | echo $static_html; | ||
| 147 | } | ||
| 148 | } | ||
| 149 | |||
| 150 | 	function get_i18n_data() { | ||
| 151 | |||
| 152 | $i18n_json = JETPACK__PLUGIN_DIR . 'languages/json/jetpack-' . get_locale() . '.json'; | ||
| 153 | |||
| 154 | 		if ( is_file( $i18n_json ) && is_readable( $i18n_json ) ) { | ||
| 155 | $locale_data = @file_get_contents( $i18n_json ); | ||
| 156 | 			if ( $locale_data ) { | ||
| 157 | return $locale_data; | ||
| 158 | } | ||
| 159 | } | ||
| 160 | |||
| 161 | // Return empty if we have nothing to return so it doesn't fail when parsed in JS | ||
| 162 | 		return '{}'; | ||
| 163 | } | ||
| 164 | |||
| 165 | /** | ||
| 166 | * Gets array of any Jetpack notices that have been dismissed. | ||
| 167 | * | ||
| 168 | * @since 4.0.1 | ||
| 169 | * @return mixed|void | ||
| 170 | */ | ||
| 171 | 	function get_dismissed_jetpack_notices() { | ||
| 183 | |||
| 184 | 	function additional_styles() { | ||
| 185 | $rtl = is_rtl() ? '.rtl' : ''; | ||
| 186 | |||
| 187 | wp_enqueue_style( 'dops-css', plugins_url( "_inc/build/admin.dops-style$rtl.css", JETPACK__PLUGIN_FILE ), array(), JETPACK__VERSION ); | ||
| 188 | wp_enqueue_style( 'components-css', plugins_url( "_inc/build/style.min$rtl.css", JETPACK__PLUGIN_FILE ), array(), JETPACK__VERSION ); | ||
| 189 | } | ||
| 190 | |||
| 191 | 	function page_admin_scripts() { | ||
| 192 | 		if ( $this->is_redirecting ) { | ||
| 193 | return; // No need for scripts on a fallback page | ||
| 194 | } | ||
| 284 | } | ||
| 285 | |||
| 416 |