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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\Admin_Bar_Compatibility; |
| 14 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_Invalidator; |
| 15 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_State; |
| 16 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_Storage; |
| 17 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Display_Critical_CSS; |
| 18 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Generator; |
| 19 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Regenerate; |
| 20 | use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Source_Providers; |
| 21 | use Automattic\Jetpack_Boost\Lib\Premium_Features; |
| 22 | use Automattic\Jetpack_Boost\REST_API\Contracts\Has_Always_Available_Endpoints; |
| 23 | use Automattic\Jetpack_Boost\REST_API\Endpoints\Update_Cloud_CSS; |
| 24 | |
| 25 | 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 { |
| 26 | |
| 27 | /** User has requested regeneration manually or through activating the module. */ |
| 28 | const REGENERATE_REASON_USER_REQUEST = 'user_request'; |
| 29 | |
| 30 | /** A post was updated/created. */ |
| 31 | const REGENERATE_REASON_SAVE_POST = 'save_post'; |
| 32 | |
| 33 | /** A cornerstone page or the list of cornerstone pages was updated. */ |
| 34 | const REGENERATE_REASON_CORNERSTONE_UPDATE = 'cornerstone_update'; |
| 35 | |
| 36 | /** Existing critical CSS invalidated because of a significant change, e.g. Theme changed. */ |
| 37 | const REGENERATE_REASON_INVALIDATED = 'invalidated'; |
| 38 | |
| 39 | /** Requesting a regeneration because the previous request had failed and this is a followup attempt to regenerate Critical CSS. */ |
| 40 | const REGENERATE_REASON_FOLLOWUP = 'followup'; |
| 41 | |
| 42 | /** |
| 43 | * Critical CSS storage class instance. |
| 44 | * |
| 45 | * @var Critical_CSS_Storage |
| 46 | */ |
| 47 | protected $storage; |
| 48 | |
| 49 | /** |
| 50 | * Critical CSS Provider Paths. |
| 51 | * |
| 52 | * @var Source_Providers |
| 53 | */ |
| 54 | protected $paths; |
| 55 | |
| 56 | public function __construct() { |
| 57 | $this->storage = new Critical_CSS_Storage(); |
| 58 | $this->paths = new Source_Providers(); |
| 59 | } |
| 60 | |
| 61 | public function setup() { |
| 62 | add_action( 'wp', array( $this, 'display_critical_css' ) ); |
| 63 | add_action( 'save_post', array( $this, 'handle_save_post' ), 10, 2 ); |
| 64 | add_action( 'jetpack_boost_critical_css_invalidated', array( $this, 'handle_critical_css_invalidated' ) ); |
| 65 | add_filter( 'jetpack_boost_total_problem_count', array( $this, 'update_total_problem_count' ) ); |
| 66 | |
| 67 | Generator::init(); |
| 68 | Critical_CSS_Invalidator::init(); |
| 69 | Cloud_CSS_Followup::init(); |
| 70 | |
| 71 | return true; |
| 72 | } |
| 73 | |
| 74 | public static function activate() { |
| 75 | ( new Regenerate() )->start(); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Check if the module is ready and already serving critical CSS. |
| 80 | * |
| 81 | * @return bool |
| 82 | */ |
| 83 | public function is_ready() { |
| 84 | return ( new Critical_CSS_State() )->is_generated(); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Get the action names that will be triggered when the module is ready and serving critical CSS. |
| 89 | * |
| 90 | * @return string[] |
| 91 | */ |
| 92 | public static function get_change_output_action_names() { |
| 93 | return array( 'jetpack_boost_critical_css_invalidated', 'jetpack_boost_critical_css_generated' ); |
| 94 | } |
| 95 | |
| 96 | public static function is_available() { |
| 97 | return true === Premium_Features::has_feature( Premium_Features::CLOUD_CSS ); |
| 98 | } |
| 99 | |
| 100 | public static function get_slug() { |
| 101 | return 'cloud_css'; |
| 102 | } |
| 103 | |
| 104 | public function get_always_available_endpoints() { |
| 105 | return array( |
| 106 | new Update_Cloud_CSS(), |
| 107 | ); |
| 108 | } |
| 109 | |
| 110 | public function display_critical_css() { |
| 111 | |
| 112 | // Don't look for Critical CSS in the dashboard. |
| 113 | if ( is_admin() ) { |
| 114 | return; |
| 115 | } |
| 116 | |
| 117 | // Don't show Critical CSS in customizer previews. |
| 118 | if ( is_customize_preview() ) { |
| 119 | return; |
| 120 | } |
| 121 | |
| 122 | // Don't display Critical CSS, if current page load is by the Critical CSS generator. |
| 123 | if ( Generator::is_generating_critical_css() ) { |
| 124 | return; |
| 125 | } |
| 126 | |
| 127 | // Get the Critical CSS to show. |
| 128 | $critical_css = $this->paths->get_current_request_css(); |
| 129 | if ( ! $critical_css ) { |
| 130 | $keys = $this->paths->get_current_request_css_keys(); |
| 131 | $pending = ( new Critical_CSS_State() )->has_pending_provider( $keys ); |
| 132 | |
| 133 | // If Cloud CSS is still generating and the user is logged in, render the status information in a comment. |
| 134 | if ( $pending && is_user_logged_in() ) { |
| 135 | $display = new Display_Critical_CSS( '/* ' . __( 'Jetpack Boost is currently generating critical css for this page', 'jetpack-boost' ) . ' */' ); |
| 136 | add_action( 'wp_head', array( $display, 'display_critical_css' ), 0 ); |
| 137 | } |
| 138 | return; |
| 139 | } |
| 140 | |
| 141 | if ( defined( 'WP_DEBUG' ) && WP_DEBUG === true ) { |
| 142 | $critical_css = "/* Critical CSS Key: {$this->paths->get_current_critical_css_key()} */\n" . $critical_css; |
| 143 | } |
| 144 | |
| 145 | $display = new Display_Critical_CSS( $critical_css ); |
| 146 | add_action( 'wp_head', array( $display, 'display_critical_css' ), 0 ); |
| 147 | add_filter( 'style_loader_tag', array( $display, 'asynchronize_stylesheets' ), 10, 4 ); |
| 148 | add_action( 'wp_footer', array( $display, 'onload_flip_stylesheets' ) ); |
| 149 | |
| 150 | // Ensure admin bar compatibility. |
| 151 | Admin_Bar_Compatibility::init(); |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Create a Cloud CSS requests for provider groups. |
| 156 | * |
| 157 | * Initialize the Cloud CSS request. Provide $post parameter to limit generating to provider groups only associated |
| 158 | * with a specific post. |
| 159 | */ |
| 160 | public function generate_cloud_css( $reason, $providers = array() ) { |
| 161 | $grouped_urls = array(); |
| 162 | $grouped_ratios = array(); |
| 163 | |
| 164 | foreach ( $providers as $source ) { |
| 165 | $provider = $source['key']; |
| 166 | $grouped_urls[ $provider ] = $source['urls']; |
| 167 | $grouped_ratios[ $provider ] = $source['success_ratio']; |
| 168 | } |
| 169 | |
| 170 | // Send the request to the Cloud. |
| 171 | $payload = array( |
| 172 | 'providers' => $grouped_urls, |
| 173 | 'successRatios' => $grouped_ratios, |
| 174 | ); |
| 175 | $payload['requestId'] = md5( |
| 176 | wp_json_encode( |
| 177 | $payload, |
| 178 | 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. |
| 179 | ) . time() |
| 180 | ); |
| 181 | $payload['reason'] = $reason; |
| 182 | return Boost_API::post( 'cloud-css', $payload ); |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Handle regeneration of Cloud CSS when a post is saved. |
| 187 | */ |
| 188 | public function handle_save_post( $post_id, $post ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable |
| 189 | if ( ! $post || ! isset( $post->post_type ) || ! is_post_publicly_viewable( $post ) ) { |
| 190 | return; |
| 191 | } |
| 192 | |
| 193 | if ( Cornerstone_Utils::is_cornerstone_page( $post_id ) ) { |
| 194 | $this->regenerate_cloud_css( self::REGENERATE_REASON_CORNERSTONE_UPDATE, $this->get_all_providers() ); |
| 195 | return; |
| 196 | } |
| 197 | |
| 198 | // This checks against the latest providers list, not the list |
| 199 | // stored in the database because newly added posts are always |
| 200 | // included in the providers list that will be used to generate |
| 201 | // the Cloud CSS. |
| 202 | if ( $this->is_post_in_latest_providers_list( $post ) ) { |
| 203 | $this->regenerate_cloud_css( self::REGENERATE_REASON_SAVE_POST, $this->get_all_providers( array( $post ) ) ); |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | public function regenerate_cloud_css( $reason, $providers ) { |
| 208 | $result = $this->generate_cloud_css( $reason, $providers ); |
| 209 | if ( is_wp_error( $result ) ) { |
| 210 | $state = new Critical_CSS_State(); |
| 211 | $state->set_error( $result->get_error_message() )->save(); |
| 212 | } |
| 213 | return $result; |
| 214 | } |
| 215 | |
| 216 | /** |
| 217 | * Check if the post is in the latest providers list. |
| 218 | * |
| 219 | * @param int|\WP_Post $post The post to check. |
| 220 | * |
| 221 | * @return bool |
| 222 | */ |
| 223 | public function is_post_in_latest_providers_list( $post ) { |
| 224 | $post_link = get_permalink( $post ); |
| 225 | $providers = $this->get_all_providers(); |
| 226 | |
| 227 | foreach ( $providers as $provider ) { |
| 228 | if ( in_array( $post_link, $provider['urls'], true ) ) { |
| 229 | return true; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | return false; |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * Called when stored Critical CSS has been invalidated. Triggers a new Cloud CSS request. |
| 238 | */ |
| 239 | public function handle_critical_css_invalidated() { |
| 240 | $this->regenerate_cloud_css( self::REGENERATE_REASON_INVALIDATED, $this->get_all_providers() ); |
| 241 | Cloud_CSS_Followup::schedule(); |
| 242 | } |
| 243 | |
| 244 | public function get_all_providers( $context_posts = array() ) { |
| 245 | $source_providers = new Source_Providers(); |
| 246 | return $source_providers->get_provider_sources( $context_posts ); |
| 247 | } |
| 248 | |
| 249 | public function get_existing_sources() { |
| 250 | $state = new Critical_CSS_State(); |
| 251 | $data = $state->get(); |
| 252 | if ( ! empty( $data['providers'] ) ) { |
| 253 | $providers = $data['providers']; |
| 254 | } else { |
| 255 | $providers = $this->get_all_providers(); |
| 256 | } |
| 257 | |
| 258 | return $providers; |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * Updates the total problem count for Boost if something's |
| 263 | * wrong with Cloud CSS. |
| 264 | * |
| 265 | * @param int $count The current problem count. |
| 266 | * |
| 267 | * @return int |
| 268 | */ |
| 269 | public function update_total_problem_count( $count ) { |
| 270 | return ( new Critical_CSS_State() )->has_errors() ? ++$count : $count; |
| 271 | } |
| 272 | } |