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<?php
/**
* Media class for handling media schema fragments in SmartCrawl.
*
* @package SmartCrawl
*/
namespace SmartCrawl\Schema;
use SmartCrawl\Singleton;
use SmartCrawl\Controllers;
/**
* Class Media
*
* Handles media schema fragments.
*/
class Media extends Controllers\Controller {
use Singleton;
const META_KEY = '_wds_post_media_schema_cache';
/**
* Indicates if the oEmbed provider is enabled.
*
* @var bool
*/
private $oembed_provider = false;
/**
* The embed URL.
*
* @var bool
*/
private $embed_url = false;
/**
* Initializes the Media class.
*
* @return void
*/
protected function init() {
add_action( 'save_post', array( $this, 'handle_post_save' ) );
add_filter( 'oembed_fetch_url', array( $this, 'intercept_embed_response' ), 10, 3 );
}
/**
* Intercepts the embed response.
*
* @param mixed $provider The oEmbed provider.
* @param string $url The URL to be embedded.
*
* @return mixed The provider.
*/
public function intercept_embed_response( $provider, $url ) {
global $post;
if (
is_main_query()
&& is_singular()
&& ! empty( $post )
&& $this->is_supported_media( $url )
) {
$this->oembed_provider = $provider;
$this->embed_url = $url;
add_filter( 'http_response', array( $this, 'save_intercepted_embed_response' ), 10, 3 );
}
return $provider;
}
/**
* Saves the intercepted embed response.
*
* @param mixed $response The oEmbed response.
* @param array $parsed_args The parsed arguments.
* @param string $provider The oEmbed provider.
*
* @return mixed The response.
*/
public function save_intercepted_embed_response( $response, $parsed_args, $provider ) {
global $post;
$is_expected_provider = strpos( $provider, $this->oembed_provider ) !== false;
if ( $is_expected_provider && ! is_wp_error( $response ) && ! empty( $post->ID ) ) {
$data = json_decode( wp_remote_retrieve_body( $response ) );
if ( false !== $data ) {
$cache = $this->get_cache( $post->ID );
$media_type = $this->is_supported_audio( $this->embed_url ) ? 'audio' : 'video';
$key = $this->get_item_data_key( $this->embed_url );
$data = $this->prepare_oembed_data( $this->embed_url, $data );
if ( $data ) {
$cache[ $media_type ][ $key ] = $data;
}
$this->set_cache( $post->ID, $cache );
$this->embed_url = false;
$this->oembed_provider = false;
}
}
remove_filter( 'http_response', array( $this, 'save_intercepted_embed_response' ) );
return $response;
}
/**
* Handles the post save action.
*
* @param int $post_id The ID of the post being saved.
*
* @return void
*/
public function handle_post_save( $post_id ) {
if ( wp_is_post_revision( $post_id ) || wp_is_post_autosave( $post_id ) ) {
return;
}
$post = get_post( $post_id );
$urls = $this->extract_supported_urls( $post->post_content );
$previous_data = $this->get_cache( $post_id );
$cache = array();
foreach ( $urls as $url ) {
if ( $this->is_supported_audio( $url ) ) {
$audio_data_key = $this->get_item_data_key( $url );
$audio_data = \smartcrawl_get_array_value( $previous_data, array( 'audio', $audio_data_key ) );
if ( empty( $audio_data ) ) {
$audio_data = $this->fetch_oembed_data( $url );
}
if ( $audio_data ) {
$cache['audio'][ $audio_data_key ] = $audio_data;
}
}
if ( $this->is_youtube_url( $url ) ) {
$youtube_data_key = $this->get_item_data_key( $url );
$youtube_data = \smartcrawl_get_array_value( $previous_data, array( 'youtube', $youtube_data_key ) );
if ( empty( $youtube_data ) ) {
$youtube_data = \SmartCrawl\Youtube_Data_Fetcher::get_video_info( $url );
}
if ( $youtube_data ) {
$cache['youtube'][ $youtube_data_key ] = $youtube_data;
}
}
if ( $this->is_supported_video( $url ) ) {
$video_data_key = $this->get_item_data_key( $url );
$video_data = \smartcrawl_get_array_value( $previous_data, array( 'video', $video_data_key ) );
if ( empty( $video_data ) ) {
$video_data = $this->fetch_oembed_data( $url );
}
if ( $video_data ) {
$cache['video'][ $video_data_key ] = $video_data;
}
}
}
if ( $cache ) {
$this->set_cache( $post_id, $cache );
} else {
$this->delete_cache( $post_id );
}
}
/**
* Maybe refreshes the WordPress embeds cache.
*
* @param \WP_Post $post The post object.
*
* @return void
*/
public function maybe_refresh_wp_embeds_cache( $post ) {
$supported_urls = $this->extract_supported_urls( $post->post_content );
$cache = $this->get_cache( $post->ID );
if ( ! empty( $supported_urls ) && empty( $cache ) ) {
$this->refresh_wp_embeds_cache( $post );
}
}
/**
* Refreshes the WordPress embeds cache.
*
* @param \WP_Post $post The post object.
*
* @return void
*/
private function refresh_wp_embeds_cache( $post ) {
$zero_oembed_ttl = function () {
return 0;
};
add_filter( 'oembed_ttl', $zero_oembed_ttl );
global $wp_embed;
$wp_embed->cache_oembed( $post->ID );
remove_filter( 'oembed_ttl', $zero_oembed_ttl );
}
/**
* Extracts supported URLs from the post content.
*
* @param string $post_content The post content.
*
* @return string[] The supported URLs.
*/
private function extract_supported_urls( $post_content ) {
$urls = wp_extract_urls( $post_content );
return array_filter( $urls, array( $this, 'is_supported_media' ) );
}
/**
* Gets the item data key for a URL.
*
* @param string $url The URL.
*
* @return string The item data key.
*/
private function get_item_data_key( $url ) {
return md5( trim( $url ) );
}
/**
* Gets the cache for a post.
*
* @param int $post_id The ID of the post.
*
* @return array The cache data.
*/
public function get_cache( $post_id ) {
$cache = get_post_meta( $post_id, self::META_KEY, true );
return empty( $cache ) ? array() : $cache;
}
/**
* Sets the cache for a post.
*
* @param int $post_id The ID of the post.
* @param mixed $value The cache value.
*
* @return bool|int True on success, false on failure.
*/
private function set_cache( $post_id, $value ) {
return update_post_meta( $post_id, self::META_KEY, $value );
}
/**
* Deletes the cache for a post.
*
* @param int $post_id The ID of the post.
*
* @return bool True on success, false on failure.
*/
private function delete_cache( $post_id ) {
return delete_post_meta( $post_id, self::META_KEY );
}
/**
* Fetches oEmbed data for a URL.
*
* @param string $url The URL.
*
* @return array The oEmbed data.
*/
private function fetch_oembed_data( $url ) {
$url = trim( $url ); // Remove white spaces if any.
$autoembed = $this->get_oembed();
$provider = $autoembed->get_provider( $url );
if ( filter_var( $provider, FILTER_VALIDATE_URL ) === false ) {
return array();
}
return $this->prepare_oembed_data(
$url,
$autoembed->fetch( $provider, $url )
);
}
/**
* Prepares oEmbed data.
*
* @param string $url The URL.
* @param mixed $data The oEmbed data.
*
* @return array The prepared oEmbed data.
*/
private function prepare_oembed_data( $url, $data ) {
if ( ! $data ) {
return array();
}
$data->url = $url;
return (array) $data;
}
/**
* Gets the oEmbed instance.
*
* @return \WP_oEmbed The oEmbed instance.
*/
private function get_oembed() {
if ( ! class_exists( '\WP_oEmbed' ) ) {
require_once ABSPATH . WPINC . '/class-oembed.php';
}
return new \WP_oEmbed();
}
/**
* Checks if a URL has a specific domain.
*
* @param string $url The URL.
* @param string|array $domains The domains to check.
*
* @return bool True if the URL has the domain, false otherwise.
*/
private function url_has_domain( $url, $domains ) {
$domains = join( '|', array_map( 'preg_quote', $domains ) );
return (bool) preg_match( "~http(s)?://([^.]*.)?($domains).*~", $url );
}
/**
* Checks if a URL is a YouTube URL.
*
* @param string $url The URL.
*
* @return bool True if the URL is a YouTube URL, false otherwise.
*/
private function is_youtube_url( $url ) {
return $this->url_has_domain( $url, array( 'youtube.com', 'youtu.be' ) );
}
/**
* Checks if a URL is supported media.
*
* @param string $url The URL.
*
* @return bool True if the URL is supported media, false otherwise.
*/
private function is_supported_media( $url ) {
return $this->url_has_domain(
$url,
array_merge(
$this->get_supported_video_domains(),
$this->get_supported_audio_domains()
)
);
}
/**
* Checks if a URL is supported video.
*
* @param string $url The URL.
*
* @return bool True if the URL is supported video, false otherwise.
*/
private function is_supported_video( $url ) {
return $this->url_has_domain( $url, $this->get_supported_video_domains() );
}
/**
* Checks if a URL is supported audio.
*
* @param string $url The URL.
*
* @return bool True if the URL is supported audio, false otherwise.
*/
private function is_supported_audio( $url ) {
return $this->url_has_domain( $url, $this->get_supported_audio_domains() );
}
/**
* Gets the supported audio domains.
*
* @return string[] The supported audio domains.
*/
private function get_supported_audio_domains() {
return array(
'soundcloud.com',
'mixcloud.com',
'spotify.com',
);
}
/**
* Gets the supported video domains.
*
* @return string[] The supported video domains.
*/
private function get_supported_video_domains() {
return array(
'ted.com',
'vimeo.com',
'dailymotion.com',
'videopress.com',
'vine.com',
'youtube.com',
'youtu.be',
);
}
}