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<?php

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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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use AMPforWP\AMPVendor\AMP_Base_Embed_Handler;

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use AMPforWP\AMPVendor\AMP_HTML_Utils;

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$file_path = AMP__VENDOR__DIR__ . '/includes/embeds/class-amp-base-embed-handler.php';

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if( file_exists($file_path) ){

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require_once $file_path;

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}

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// Much of this class is borrowed from Jetpack embeds

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class AMPforWP_YouTube_Embed_Handler extends AMP_Base_Embed_Handler {

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const SHORT_URL_HOST = 'youtu.be';

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// Only handling single videos. Playlists are handled elsewhere.

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const URL_PATTERN = '#https?://(?:www\.)?(?:youtube.com/(?:v/|e/|embed/|watch[/\#?])|youtu\.be/).*#i';

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const RATIO = 0.5625;

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protected $DEFAULT_WIDTH = 600;

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protected $DEFAULT_HEIGHT = 338;

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private static $script_slug = 'amp-youtube';

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private static $script_src = 'https://cdn.ampproject.org/v0/amp-youtube-0.1.js';

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function __construct( $args = array() ) {

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parent::__construct( $args );

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if ( isset( $this->args['content_max_width'] ) ) {

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$max_width = $this->args['content_max_width'];

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$this->args['width'] = $max_width;

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$this->args['height'] = round( $max_width * self::RATIO );

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}

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}

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function register_embed() {

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wp_embed_register_handler( 'amp-youtube', self::URL_PATTERN, array( $this, 'oembed' ), -1 );

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add_shortcode( 'youtube', array( $this, 'shortcode' ) );

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add_filter( 'wp_video_shortcode_override', array( $this, 'video_override') , 10, 2 );

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}

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public function unregister_embed() {

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wp_embed_unregister_handler( 'amp-youtube', -1 );

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remove_shortcode( 'youtube' );

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}

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public function get_scripts() {

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if ( ! $this->did_convert_elements ) {

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return array();

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}

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return array( self::$script_slug => self::$script_src );

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}

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public function shortcode( $attr ) {

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$url = false;

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$video_id = false;

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if ( isset( $attr[0] ) ) {

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$url = ltrim( $attr[0] , '=' );

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} elseif ( function_exists ( 'ampforwp_youtube_shortcode' ) ) {

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$url = ampforwp_youtube_shortcode( $attr );

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}

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if ( empty( $url ) ) {

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return '';

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}

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$video_id = $this->get_video_id_from_url( $url );

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return $this->render( array(

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'url' => $url,

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'video_id' => $video_id,

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) );

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}

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public function oembed( $matches, $attr, $url, $rawattr ) {

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return $this->shortcode( array( $url ) );

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}

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public function render( $args ) {

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$args = wp_parse_args( $args, array(

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'video_id' => false,

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) );

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if ( empty( $args['video_id'] ) ) {

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return AMP_HTML_Utils::build_tag( 'a', array( 'href' => esc_url( $args['url'] ), 'class' => 'amp-wp-embed-fallback' ), esc_html( $args['url'] ) );

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}

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$this->did_convert_elements = true;

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// Return it with a filter for the modification purpose #1378

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$attrs = array(

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'data-videoid' => $args['video_id'],

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'layout' => 'responsive',

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'width' => $this->args['width'],

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'height' => $this->args['height'],

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);

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if(ampforwp_get_setting('ampforwp-amp-video-docking')==true){

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$attrs['dock'] = '#dock-slot';

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}

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if(ampforwp_get_setting('ampforwp-amp-video-lightbox')==true){

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$attrs['autoplay'] = true;

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}

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$attrs = ampforwp_amp_consent_check( $attrs );

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return AMP_HTML_Utils::build_tag('amp-youtube',apply_filters('amp_youtube_params', $attrs) );

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}

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private function get_video_id_from_url( $url ) {

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$video_id = false;

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$parsed_url = parse_url( $url );

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if(!isset($parsed_url['host'])){

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$parsed_url['host'] = '';

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}

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if ( self::SHORT_URL_HOST === substr( $parsed_url['host'], -strlen( self::SHORT_URL_HOST ) ) ) {

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// youtu.be/{id}

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$parts = explode( '/', $parsed_url['path'] );

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if ( ! empty( $parts ) ) {

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$video_id = $parts[1];

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}

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} else {

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// ?v={id} or ?list={id}

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if(isset($parsed_url['query'])){

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parse_str( $parsed_url['query'], $query_args );

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}

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if ( isset( $query_args['v'] ) ) {

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$video_id = $this->sanitize_v_arg( $query_args['v'] );

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}

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}

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if ( empty( $video_id ) ) {

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// /(v|e|embed)/{id}

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$parts = explode( '/', $parsed_url['path'] );

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if ( in_array( $parts[1], array( 'v', 'e', 'embed' ) ) ) {

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$video_id = $parts[2];

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}

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}

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return $video_id;

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}

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private function sanitize_v_arg( $value ) {

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// Deal with broken params like `?v=123?rel=0`

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if ( false !== strpos( $value, '?' ) ) {

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$value = strtok( $value, '?' );

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}

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return $value;

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}

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/**

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* Override the output of YouTube videos.

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* This overrides the value in wp_video_shortcode().

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* The pattern matching is copied from WP_Widget_Media_Video::render().

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* @param string $html Empty variable to be replaced with shortcode markup.

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* @param array $attr The shortcode attributes.

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* @return string|null $markup The markup to output.

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public function video_override( $html, $attr ) {

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if ( ! isset( $attr['src'] ) ) {

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return $html;

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}

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$src = $attr['src'];

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$youtube_pattern = '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#';

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if ( 1 === preg_match( $youtube_pattern, $src ) ) {

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return $this->shortcode( [ $src ] );

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}

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return $html;

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}

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}

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