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| 1 | <?php |
| 2 | |
| 3 | namespace Automattic\Jetpack_Boost\Modules\Optimizations\Cloud_CSS; |
| 4 | |
| 5 | use Automattic\Jetpack\Boost_Core\Lib\Boost_API; |
| 6 | use Automattic\Jetpack_Boost\Contracts\Changes_Output_After_Activation; |
| 7 | use Automattic\Jetpack_Boost\Contracts\Feature; |
| 8 | use Automattic\Jetpack_Boost\Contracts\Has_Activate; |
| 9 | use Automattic\Jetpack_Boost\Contracts\Needs_To_Be_Ready; |
| 10 | use Automattic\Jetpack_Boost\Contracts\Needs_Website_To_Be_Public; |
| 11 | use Automattic\Jetpack_Boost\Contracts\Optimization; |
| 12 | use Automattic\Jetpack_Boost\Lib\Cornerstone\Cornerstone_Utils; |
| 13 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_Invalidator; |
| 14 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_State; |
| 15 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_Storage; |
| 16 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Display_Critical_CSS; |
| 17 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Generator; |
| 18 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Regenerate; |
| 19 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Source_Providers; |
| 20 | use Automattic\Jetpack_Boost\Lib\Premium_Features; |
| 21 | use Automattic\Jetpack_Boost\REST_API\Contracts\Has_Always_Available_Endpoints; |
| 22 | use Automattic\Jetpack_Boost\REST_API\Endpoints\Update_Cloud_CSS; |
| 23 | |
| 24 | class Cloud_CSS implements Feature, Has_Activate, Has_Always_Available_Endpoints, Changes_Output_After_Activation, Optimization, Needs_To_Be_Ready, Needs_Website_To_Be_Public { |
| 25 | |
| 26 | /** User has requested regeneration manually or through activating the module. */ |
| 27 | const REGENERATE_REASON_USER_REQUEST = 'user_request'; |
| 28 | |
| 29 | /** A post was updated/created. */ |
| 30 | const REGENERATE_REASON_SAVE_POST = 'save_post'; |
| 31 | |
| 32 | /** A cornerstone page or the list of cornerstone pages was updated. */ |
| 33 | const REGENERATE_REASON_CORNERSTONE_UPDATE = 'cornerstone_update'; |
| 34 | |
| 35 | /** Existing critical CSS invalidated because of a significant change, e.g. Theme changed. */ |
| 36 | const REGENERATE_REASON_INVALIDATED = 'invalidated'; |
| 37 | |
| 38 | /** Requesting a regeneration because the previous request had failed and this is a followup attempt to regenerate Critical CSS. */ |
| 39 | const REGENERATE_REASON_FOLLOWUP = 'followup'; |
| 40 | |
| 41 | /** |
| 42 | * Critical CSS storage class instance. |
| 43 | * |
| 44 | * @var Critical_CSS_Storage |
| 45 | */ |
| 46 | protected $storage; |
| 47 | |
| 48 | /** |
| 49 | * Critical CSS Provider Paths. |
| 50 | * |
| 51 | * @var Source_Providers |
| 52 | */ |
| 53 | protected $paths; |
| 54 | |
| 55 | public function __construct() { |
| 56 | $this->storage = new Critical_CSS_Storage(); |
| 57 | $this->paths = new Source_Providers(); |
| 58 | } |
| 59 | |
| 60 | public function setup() { |
| 61 | add_action( 'wp', array( $this, 'display_critical_css' ) ); |
| 62 | add_action( 'save_post', array( $this, 'handle_save_post' ), 10, 2 ); |
| 63 | add_action( 'jetpack_boost_critical_css_invalidated', array( $this, 'handle_critical_css_invalidated' ) ); |
| 64 | add_filter( 'jetpack_boost_total_problem_count', array( $this, 'update_total_problem_count' ) ); |
| 65 | |
| 66 | Generator::init(); |
| 67 | Critical_CSS_Invalidator::init(); |
| 68 | Cloud_CSS_Followup::init(); |
| 69 | |
| 70 | return true; |
| 71 | } |
| 72 | |
| 73 | public static function activate() { |
| 74 | ( new Regenerate() )->start(); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Check if the module is ready and already serving critical CSS. |
| 79 | * |
| 80 | * @return bool |
| 81 | */ |
| 82 | public function is_ready() { |
| 83 | return ( new Critical_CSS_State() )->is_generated(); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Get the action names that will be triggered when the module is ready and serving critical CSS. |
| 88 | * |
| 89 | * @return string[] |
| 90 | */ |
| 91 | public static function get_change_output_action_names() { |
| 92 | return array( 'jetpack_boost_critical_css_invalidated', 'jetpack_boost_critical_css_generated' ); |
| 93 | } |
| 94 | |
| 95 | public static function is_available() { |
| 96 | return true === Premium_Features::has_feature( Premium_Features::CLOUD_CSS ); |
| 97 | } |
| 98 | |
| 99 | public static function get_slug() { |
| 100 | return 'cloud_css'; |
| 101 | } |
| 102 | |
| 103 | public function get_always_available_endpoints() { |
| 104 | return array( |
| 105 | new Update_Cloud_CSS(), |
| 106 | ); |
| 107 | } |
| 108 | |
| 109 | public function display_critical_css() { |
| 110 | |
| 111 | // Don't look for Critical CSS in the dashboard. |
| 112 | if ( is_admin() ) { |
| 113 | return; |
| 114 | } |
| 115 | |
| 116 | // Don't show Critical CSS in customizer previews. |
| 117 | if ( is_customize_preview() ) { |
| 118 | return; |
| 119 | } |
| 120 | |
| 121 | // Don't display Critical CSS, if current page load is by the Critical CSS generator. |
| 122 | if ( Generator::is_generating_critical_css() ) { |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | // Get the Critical CSS to show. |
| 127 | $critical_css = $this->paths->get_current_request_css(); |
| 128 | if ( ! $critical_css ) { |
| 129 | $keys = $this->paths->get_current_request_css_keys(); |
| 130 | $pending = ( new Critical_CSS_State() )->has_pending_provider( $keys ); |
| 131 | |
| 132 | // If Cloud CSS is still generating and the user is logged in, render the status information in a comment. |
| 133 | if ( $pending && is_user_logged_in() ) { |
| 134 | $display = new Display_Critical_CSS( '/* ' . __( 'Jetpack Boost is currently generating critical css for this page', 'jetpack-boost' ) . ' */' ); |
| 135 | add_action( 'wp_head', array( $display, 'display_critical_css' ), Display_Critical_CSS::HEAD_PRIORITY ); |
| 136 | } |
| 137 | return; |
| 138 | } |
| 139 | |
| 140 | $display = new Display_Critical_CSS( $critical_css, $this->paths->get_current_critical_css_key() ); |
| 141 | $display->register_hooks(); |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Create a Cloud CSS requests for provider groups. |
| 146 | * |
| 147 | * Initialize the Cloud CSS request. Provide $post parameter to limit generating to provider groups only associated |
| 148 | * with a specific post. |
| 149 | */ |
| 150 | public function generate_cloud_css( $reason, $providers = array() ) { |
| 151 | $grouped_urls = array(); |
| 152 | $grouped_ratios = array(); |
| 153 | |
| 154 | foreach ( $providers as $source ) { |
| 155 | $provider = $source['key']; |
| 156 | $grouped_urls[ $provider ] = $source['urls']; |
| 157 | $grouped_ratios[ $provider ] = $source['success_ratio']; |
| 158 | } |
| 159 | |
| 160 | // Send the request to the Cloud. |
| 161 | $payload = array( |
| 162 | 'providers' => $grouped_urls, |
| 163 | 'successRatios' => $grouped_ratios, |
| 164 | ); |
| 165 | $payload['requestId'] = md5( |
| 166 | wp_json_encode( |
| 167 | $payload, |
| 168 | 0 // phpcs:ignore Jetpack.Functions.JsonEncodeFlags.ZeroFound -- No `json_encode()` flags because this needs to match whatever is calculating the hash on the other end. |
| 169 | ) . time() |
| 170 | ); |
| 171 | $payload['reason'] = $reason; |
| 172 | return Boost_API::post( 'cloud-css', $payload ); |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * Handle regeneration of Cloud CSS when a post is saved. |
| 177 | */ |
| 178 | public function handle_save_post( $post_id, $post ) { |
| 179 | if ( ! $post || ! isset( $post->post_type ) || ! is_post_publicly_viewable( $post ) ) { |
| 180 | return; |
| 181 | } |
| 182 | |
| 183 | if ( Cornerstone_Utils::is_cornerstone_page( $post_id ) ) { |
| 184 | $this->regenerate_cloud_css( self::REGENERATE_REASON_CORNERSTONE_UPDATE, $this->get_all_providers() ); |
| 185 | return; |
| 186 | } |
| 187 | |
| 188 | // This checks against the latest providers list, not the list |
| 189 | // stored in the database because newly added posts are always |
| 190 | // included in the providers list that will be used to generate |
| 191 | // the Cloud CSS. |
| 192 | if ( $this->is_post_in_latest_providers_list( $post ) ) { |
| 193 | $this->regenerate_cloud_css( self::REGENERATE_REASON_SAVE_POST, $this->get_all_providers( array( $post ) ) ); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | public function regenerate_cloud_css( $reason, $providers ) { |
| 198 | $result = $this->generate_cloud_css( $reason, $providers ); |
| 199 | if ( is_wp_error( $result ) ) { |
| 200 | $state = new Critical_CSS_State(); |
| 201 | $state->set_error( $result->get_error_message() )->save(); |
| 202 | } |
| 203 | return $result; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Check if the post is in the latest providers list. |
| 208 | * |
| 209 | * @param int|\WP_Post $post The post to check. |
| 210 | * |
| 211 | * @return bool |
| 212 | */ |
| 213 | public function is_post_in_latest_providers_list( $post ) { |
| 214 | $post_link = get_permalink( $post ); |
| 215 | $providers = $this->get_all_providers(); |
| 216 | |
| 217 | foreach ( $providers as $provider ) { |
| 218 | if ( in_array( $post_link, $provider['urls'], true ) ) { |
| 219 | return true; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | return false; |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * Called when stored Critical CSS has been invalidated. Triggers a new Cloud CSS request. |
| 228 | */ |
| 229 | public function handle_critical_css_invalidated() { |
| 230 | $this->regenerate_cloud_css( self::REGENERATE_REASON_INVALIDATED, $this->get_all_providers() ); |
| 231 | Cloud_CSS_Followup::schedule(); |
| 232 | } |
| 233 | |
| 234 | public function get_all_providers( $context_posts = array() ) { |
| 235 | $source_providers = new Source_Providers(); |
| 236 | return $source_providers->get_provider_sources( $context_posts ); |
| 237 | } |
| 238 | |
| 239 | public function get_existing_sources() { |
| 240 | $state = new Critical_CSS_State(); |
| 241 | $data = $state->get(); |
| 242 | if ( ! empty( $data['providers'] ) ) { |
| 243 | $providers = $data['providers']; |
| 244 | } else { |
| 245 | $providers = $this->get_all_providers(); |
| 246 | } |
| 247 | |
| 248 | return $providers; |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Updates the total problem count for Boost if something's |
| 253 | * wrong with Cloud CSS. |
| 254 | * |
| 255 | * @param int $count The current problem count. |
| 256 | * |
| 257 | * @return int |
| 258 | */ |
| 259 | public function update_total_problem_count( $count ) { |
| 260 | return ( new Critical_CSS_State() )->has_errors() ? ++$count : $count; |
| 261 | } |
| 262 | } |