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<?php |
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require_once( AMP__ROOT__ . '/includes/utils/class-amp-dom-utils.php' ); |
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require_once( AMP__ROOT__ . '/includes/sanitizers/class-amp-base-sanitizer.php' ); |
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require_once( AMP__ROOT__ . '/includes/embeds/class-amp-base-embed-handler.php' ); |
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class AMP_Content { |
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private $content; |
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private $amp_content = ''; |
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private $amp_scripts = array(); |
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private $amp_styles = array(); |
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private $args = array(); |
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private $embed_handler_classes = array(); |
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private $sanitizer_classes = array(); |
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public function __construct( $content, $embed_handler_classes, $sanitizer_classes, $args = array() ) { |
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$this->content = $content; |
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$this->args = $args; |
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$this->embed_handler_classes = $embed_handler_classes; |
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$this->sanitizer_classes = $sanitizer_classes; |
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$this->transform(); |
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} |
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public function get_amp_content() { |
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return $this->amp_content; |
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} |
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public function get_amp_scripts() { |
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return $this->amp_scripts; |
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} |
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public function get_amp_styles() { |
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return $this->amp_styles; |
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} |
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private function transform() { |
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$content = $this->content; |
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// First, embeds + the_content filter |
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$embed_handlers = $this->register_embed_handlers(); |
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$content = apply_filters( 'the_content', $content ); |
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$this->unregister_embed_handlers( $embed_handlers ); |
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// Then, sanitize to strip and/or convert non-amp content |
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$content = $this->sanitize( $content ); |
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$this->amp_content = $content; |
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} |
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private function add_scripts( $scripts ) { |
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$this->amp_scripts = array_merge( $this->amp_scripts, $scripts ); |
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} |
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private function add_styles( $styles ) { |
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$this->amp_styles = array_merge( $this->amp_styles, $styles ); |
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} |
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private function register_embed_handlers() { |
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$embed_handlers = array(); |
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foreach ( $this->embed_handler_classes as $embed_handler_class => $args ) { |
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$embed_handler = new $embed_handler_class( array_merge( $this->args, $args ) ); |
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if ( ! is_subclass_of( $embed_handler, 'AMP_Base_Embed_Handler' ) ) { |
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_doing_it_wrong( __METHOD__, sprintf( __( 'Embed Handler (%s) must extend `AMP_Embed_Handler`', 'amp' ), $embed_handler_class ), '0.1' ); |
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continue; |
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} |
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$embed_handler->register_embed(); |
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$embed_handlers[] = $embed_handler; |
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} |
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return $embed_handlers; |
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} |
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private function unregister_embed_handlers( $embed_handlers ) { |
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foreach ( $embed_handlers as $embed_handler ) { |
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$this->add_scripts( $embed_handler->get_scripts() ); |
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$embed_handler->unregister_embed(); |
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} |
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} |
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private function sanitize( $content ) { |
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list( $sanitized_content, $scripts, $styles ) = AMP_Content_Sanitizer::sanitize( $content, $this->sanitizer_classes, $this->args ); |
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$this->add_scripts( $scripts ); |
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$this->add_styles( $styles ); |
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return $sanitized_content; |
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} |
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} |
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class AMP_Content_Sanitizer { |
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public static function sanitize( $content, $sanitizer_classes, $global_args = array() ) { |
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$scripts = array(); |
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$styles = array(); |
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$dom = AMP_DOM_Utils::get_dom_from_content( $content ); |
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foreach ( $sanitizer_classes as $sanitizer_class => $args ) { |
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if ( ! class_exists( $sanitizer_class ) ) { |
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_doing_it_wrong( __METHOD__, sprintf( __( 'Sanitizer (%s) class does not exist', 'amp' ), esc_html( $sanitizer_class ) ), '0.4.1' ); |
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continue; |
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} |
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$sanitizer = new $sanitizer_class( $dom, array_merge( $global_args, $args ) ); |
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if ( ! is_subclass_of( $sanitizer, 'AMP_Base_Sanitizer' ) ) { |
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_doing_it_wrong( __METHOD__, sprintf( __( 'Sanitizer (%s) must extend `AMP_Base_Sanitizer`', 'amp' ), esc_html( $sanitizer_class ) ), '0.1' ); |
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continue; |
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} |
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$sanitizer->sanitize(); |
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$scripts = array_merge( $scripts, $sanitizer->get_scripts() ); |
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$styles = array_merge( $styles, $sanitizer->get_styles() ); |
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} |
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$sanitized_content = AMP_DOM_Utils::get_content_from_dom( $dom ); |
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return array( $sanitized_content, $scripts, $styles ); |
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} |
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} |
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Automattic /
jetpack
Having each class in a dedicated file usually plays nice with PSR autoloaders and is therefore a well established practice. If you use other autoloaders, you might not want to follow this rule.