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msd2/wordpress/wp-content/plugins/amp/includes/embeds/class-amp-issuu-embed-handler.php

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+<?php
+/**
+ * Class AMP_Issuu_Embed_Handler
+ *
+ * @package AMP
+ * @since 0.7
+ */
+
+/**
+ * Class AMP_Issuu_Embed_Handler
+ */
+class AMP_Issuu_Embed_Handler extends AMP_Base_Embed_Handler {
+	/**
+	 * Regex matched to produce output amp-iframe.
+	 *
+	 * @const string
+	 */
+	const URL_PATTERN = '#https?://(www\.)?issuu\.com/.+/docs/.+#i';
+
+	/**
+	 * Register embed.
+	 */
+	public function register_embed() {
+		add_filter( 'embed_oembed_html', array( $this, 'filter_embed_oembed_html' ), 10, 3 );
+	}
+
+	/**
+	 * Unregister embed.
+	 */
+	public function unregister_embed() {
+		remove_filter( 'embed_oembed_html', array( $this, 'filter_embed_oembed_html' ), 10 );
+	}
+
+	/**
+	 * Filter oEmbed HTML for Meetup to prepare it for AMP.
+	 *
+	 * @param mixed  $return The shortcode callback function to call.
+	 * @param string $url    The attempted embed URL.
+	 * @param array  $attr   An array of shortcode attributes.
+	 * @return string Embed.
+	 */
+	public function filter_embed_oembed_html( $return, $url, $attr ) {
+		$parsed_url = wp_parse_url( $url );
+		if ( false !== strpos( $parsed_url['host'], 'issuu.com' ) ) {
+			if ( preg_match( '/width\s*:\s*(\d+)px/', $return, $matches ) ) {
+				$attr['width'] = $matches[1];
+			}
+			if ( preg_match( '/height\s*:\s*(\d+)px/', $return, $matches ) ) {
+				$attr['height'] = $matches[1];
+			}
+
+			$return = AMP_HTML_Utils::build_tag(
+				'amp-iframe',
+				array(
+					'width'   => $attr['width'],
+					'height'  => $attr['height'],
+					'src'     => $url,
+					'sandbox' => 'allow-scripts allow-same-origin',
+				)
+			);
+		}
+		return $return;
+	}
+}
+