152 lines
3.5 KiB
PHP
152 lines
3.5 KiB
PHP
<?php
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/**
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* Class AMP_Imgur_Embed_Handler
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*
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* @package AMP
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* @since 1.0
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*/
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/**
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* Class AMP_Imgur_Embed_Handler
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*/
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class AMP_Imgur_Embed_Handler extends AMP_Base_Embed_Handler {
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/**
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* Regex matched to produce output amp-imgur.
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*
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* @var string
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*/
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const URL_PATTERN = '#https?://(www\.)?imgur\.com/.*#i';
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/**
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* Register embed.
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*/
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public function register_embed() {
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if ( version_compare( strtok( get_bloginfo( 'version' ), '-' ), '4.9', '<' ) ) {
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// Before 4.9 the embedding Imgur is not working properly, register embed for that case.
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wp_embed_register_handler( 'amp-imgur', self::URL_PATTERN, array( $this, 'oembed' ), -1 );
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} else {
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add_filter( 'embed_oembed_html', array( $this, 'filter_embed_oembed_html' ), 10, 3 );
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}
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}
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/**
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* Unregister embed.
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*/
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public function unregister_embed() {
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if ( version_compare( strtok( get_bloginfo( 'version' ), '-' ), '4.9', '<' ) ) {
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wp_embed_unregister_handler( 'amp-imgur', -1 );
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} else {
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remove_filter( 'embed_oembed_html', array( $this, 'filter_embed_oembed_html' ), 10 );
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}
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}
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/**
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* Oembed.
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*
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* @param array $matches Matches.
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* @param array $attr Attributes.
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* @param string $url URL.
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* @param array $rawattr Raw attributes.
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* @return string Embed.
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*/
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public function oembed( $matches, $attr, $url, $rawattr ) {
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return $this->render( array( 'url' => $url ) );
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}
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/**
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* Render embed.
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*
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* @param array $args Args.
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* @return string Embed.
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*/
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public function render( $args ) {
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$args = wp_parse_args(
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$args,
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array(
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'url' => false,
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)
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);
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if ( empty( $args['url'] ) ) {
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return '';
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}
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$this->did_convert_elements = true;
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$id = $this->get_imgur_id_from_url( $args['url'] );
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if ( false === $id ) {
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return '';
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}
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return AMP_HTML_Utils::build_tag(
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'amp-imgur',
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array(
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'width' => $this->args['width'],
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'height' => $this->args['height'],
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'data-imgur-id' => $id,
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)
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);
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}
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/**
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* Filter oEmbed HTML for Imgur to prepare it for AMP.
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*
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* @param mixed $return The shortcode callback function to call.
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* @param string $url The attempted embed URL.
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* @param array $attr An array of shortcode attributes.
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* @return string Embed.
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*/
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public function filter_embed_oembed_html( $return, $url, $attr ) {
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$parsed_url = wp_parse_url( $url );
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if ( false !== strpos( $parsed_url['host'], 'imgur.com' ) ) {
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if ( preg_match( '/width=["\']?(\d+)/', $return, $matches ) ) {
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$attr['width'] = $matches[1];
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}
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if ( preg_match( '/height=["\']?(\d+)/', $return, $matches ) ) {
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$attr['height'] = $matches[1];
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}
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if ( empty( $attr['height'] ) ) {
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return $return;
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}
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$attributes = wp_array_slice_assoc( $attr, array( 'width', 'height' ) );
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if ( empty( $attr['width'] ) ) {
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$attributes['layout'] = 'fixed-height';
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$attributes['width'] = 'auto';
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}
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$attributes['data-imgur-id'] = $this->get_imgur_id_from_url( $url );
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if ( false === $attributes['data-imgur-id'] ) {
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return $return;
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}
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$return = AMP_HTML_Utils::build_tag(
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'amp-imgur',
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$attributes
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);
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}
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return $return;
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}
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/**
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* Get Imgur ID from URL.
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*
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* @param string $url URL.
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* @return bool|string ID / false.
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*/
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protected function get_imgur_id_from_url( $url ) {
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$parsed_url = wp_parse_url( $url );
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$pieces = explode( '/gallery/', $parsed_url['path'] );
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if ( ! isset( $pieces[1] ) ) {
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if ( ! preg_match( '/\/([A-Za-z0-9]+)/', $parsed_url['path'], $matches ) ) {
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return false;
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}
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return $matches[1];
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} else {
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return $pieces[1];
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}
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}
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}
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