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<?php
/**
* Class AMP_Issuu_Embed_Handler
*
* @package AMP
* @since 0.7
*/
/**
* Class AMP_Issuu_Embed_Handler
*
* @internal
*/
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', [ $this, 'filter_embed_oembed_html' ], 10, 3 );
}
/**
* Unregister embed.
*/
public function unregister_embed() {
remove_filter( 'embed_oembed_html', [ $this, 'filter_embed_oembed_html' ], 10 );
}
/**
* Filter oEmbed HTML for Meetup to prepare it for AMP.
*
* @param mixed $return The oEmbed HTML.
* @param string $url The attempted embed URL.
* @param array $attr 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',
[
'width' => $attr['width'],
'height' => $attr['height'],
'src' => $url,
'sandbox' => 'allow-scripts allow-same-origin',
]
);
}
return $return;
}
}
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