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| 1 | <?php |
| 2 | /** |
| 3 | * Environment Change Detector class. |
| 4 | * |
| 5 | * @link https://automattic.com |
| 6 | * @since 1.0.0 |
| 7 | * @package automattic/jetpack-boost |
| 8 | */ |
| 9 | |
| 10 | namespace Automattic\Jetpack_Boost\Lib; |
| 11 | |
| 12 | use Automattic\Jetpack_Boost\Lib\Cornerstone\Cornerstone_Utils; |
| 13 | |
| 14 | /** |
| 15 | * Class Environment_Change_Detector |
| 16 | */ |
| 17 | class Environment_Change_Detector { |
| 18 | |
| 19 | const ENV_CHANGE_LEGACY = '1'; |
| 20 | const ENV_CHANGE_PAGE_SAVED = 'page_saved'; |
| 21 | const ENV_CHANGE_POST_SAVED = 'post_saved'; |
| 22 | const ENV_CHANGE_SWITCHED_THEME = 'switched_theme'; |
| 23 | const ENV_CHANGE_PLUGIN_CHANGE = 'plugin_change'; |
| 24 | const ENV_CHANGE_CORNERSTONE_PAGE_SAVED = 'cornerstone_page_saved'; |
| 25 | const ENV_CHANGE_CORNERSTONE_PAGES_LIST_UPDATED = 'cornerstone_pages_list_updated'; |
| 26 | |
| 27 | /** |
| 28 | * Initialize the change detection hooks. |
| 29 | */ |
| 30 | public static function init() { |
| 31 | $object = new self(); |
| 32 | $object->register_hooks(); |
| 33 | } |
| 34 | |
| 35 | public function register_hooks() { |
| 36 | add_action( 'after_switch_theme', array( $this, 'handle_theme_change' ) ); |
| 37 | add_action( 'save_post', array( $this, 'handle_post_change' ), 10, 2 ); |
| 38 | add_action( 'activated_plugin', array( $this, 'handle_plugin_change' ) ); |
| 39 | add_action( 'deactivated_plugin', array( $this, 'handle_plugin_change' ) ); |
| 40 | } |
| 41 | |
| 42 | public function handle_post_change( $post_id, $post ) { |
| 43 | // Ignore changes to any post which is not published. |
| 44 | if ( 'publish' !== $post->post_status ) { |
| 45 | return; |
| 46 | } |
| 47 | |
| 48 | // Ignore changes to post types which do not affect the front-end UI |
| 49 | if ( ! $this->is_post_type_invalidating( $post->post_type ) ) { |
| 50 | return; |
| 51 | } |
| 52 | |
| 53 | $this->do_action( false, $this->get_post_change_type( $post ) ); |
| 54 | } |
| 55 | |
| 56 | public function handle_theme_change() { |
| 57 | $this->do_action( true, $this::ENV_CHANGE_SWITCHED_THEME ); |
| 58 | } |
| 59 | |
| 60 | public function handle_plugin_change() { |
| 61 | $this->do_action( false, $this::ENV_CHANGE_PLUGIN_CHANGE ); |
| 62 | } |
| 63 | |
| 64 | public function handle_cornerstone_pages_list_update() { |
| 65 | $this->do_action( false, $this::ENV_CHANGE_CORNERSTONE_PAGES_LIST_UPDATED ); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Fire the environment change action. |
| 70 | * |
| 71 | * @param bool $is_major_change Whether the change is such that we should stop serving existing critical CSS immediately unless refreshed. |
| 72 | * @param string $change_type The change type. |
| 73 | */ |
| 74 | public function do_action( $is_major_change, $change_type ) { |
| 75 | do_action_deprecated( |
| 76 | 'jetpack_boost_critical_css_environment_changed', |
| 77 | array( $is_major_change, $change_type ), |
| 78 | '3.20.0', |
| 79 | 'jetpack_boost_environment_changed' |
| 80 | ); |
| 81 | |
| 82 | do_action( 'jetpack_boost_environment_changed', $is_major_change, $change_type ); |
| 83 | } |
| 84 | |
| 85 | public static function get_available_env_change_statuses() { |
| 86 | return array( |
| 87 | self::ENV_CHANGE_PAGE_SAVED, |
| 88 | self::ENV_CHANGE_POST_SAVED, |
| 89 | self::ENV_CHANGE_SWITCHED_THEME, |
| 90 | self::ENV_CHANGE_PLUGIN_CHANGE, |
| 91 | self::ENV_CHANGE_CORNERSTONE_PAGE_SAVED, |
| 92 | self::ENV_CHANGE_CORNERSTONE_PAGES_LIST_UPDATED, |
| 93 | ); |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Given a post_type, return true if this post type affects the front end of |
| 98 | * the site - i.e.: should cause cached optimizations to be invalidated. |
| 99 | * |
| 100 | * @param string $post_type The post type to check |
| 101 | * @return bool True if this post type affects the front end of the site. |
| 102 | */ |
| 103 | private function is_post_type_invalidating( $post_type ) { |
| 104 | // Special cases: items which are not viewable, but affect the UI. |
| 105 | if ( in_array( $post_type, array( 'wp_template', 'wp_template_part' ), true ) ) { |
| 106 | return true; |
| 107 | } |
| 108 | |
| 109 | if ( is_post_type_viewable( $post_type ) ) { |
| 110 | return true; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Get the type of change for a specific post. |
| 116 | * |
| 117 | * @param \WP_Post $post The post object. |
| 118 | * @return string The change type. |
| 119 | */ |
| 120 | private function get_post_change_type( $post ) { |
| 121 | if ( Cornerstone_Utils::is_cornerstone_page( $post->ID ) ) { |
| 122 | return $this::ENV_CHANGE_CORNERSTONE_PAGE_SAVED; |
| 123 | } |
| 124 | |
| 125 | if ( 'page' === $post->post_type ) { |
| 126 | $change_type = $this::ENV_CHANGE_PAGE_SAVED; |
| 127 | } else { |
| 128 | $change_type = $this::ENV_CHANGE_POST_SAVED; |
| 129 | } |
| 130 | |
| 131 | return $change_type; |
| 132 | } |
| 133 | } |