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