<?php

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use AMPforWP\AMPVendor\AMP_DOM_Utils;

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// Exit if accessed directly

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if ( ! defined( 'ABSPATH' ) ) {

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exit;

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}

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require_once( AMP__VENDOR__DIR__ . '/includes/utils/class-amp-dom-utils.php' );

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require_once( AMP__VENDOR__DIR__ . '/includes/sanitizers/class-amp-base-sanitizer.php' );

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require_once( AMP__VENDOR__DIR__ . '/includes/embeds/class-amp-base-embed-handler.php' );

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require_once( AMP__VENDOR__DIR__ . '/includes/embeds/class-amp-playlist-embed-handler.php' );

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class AMPFORWP_Content {

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private $content;

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private $amp_content = '';

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public $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( 'ampforwp_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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if ( class_exists('AMPforWP\\AMPVendor\\'.$embed_handler_class) ) {

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$embed_handler_class = 'AMPforWP\\AMPVendor\\'.$embed_handler_class;

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}

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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, 'AMPforWP\\AMPVendor\\AMP_Base_Embed_Handler' ) ) {

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_doing_it_wrong( __METHOD__, sprintf( esc_html__( 'Embed Handler (%s) must extend `AMP_Embed_Handler`', 'accelerated-mobile-pages' ), esc_html($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 ) = AMPFORWP_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 AMPFORWP_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('AMPforWP\\AMPVendor\\'.$sanitizer_class) ) {

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$sanitizer_class = 'AMPforWP\\AMPVendor\\'.$sanitizer_class;

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$amp_base_sanitizer = 'AMPforWP\\AMPVendor\\AMP_Base_Sanitizer';

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}

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elseif(function_exists('amp_activate') && class_exists('AMP_Base_Sanitizer') ) {

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$amp_base_sanitizer = 'AMP_Base_Sanitizer';

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}

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if ( ! class_exists( $sanitizer_class ) ) {

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_doing_it_wrong( __METHOD__, sprintf( esc_html__( 'Sanitizer (%s) class does not exist', 'accelerated-mobile-pages' ), 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( esc_html__( 'Sanitizer (%s) must extend `AMP_Base_Sanitizer`', 'accelerated-mobile-pages' ), 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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