ds_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 );
	}

	/**
	 * @return string[]
	 */
	private function extract_supported_urls( $post_content ) {
		$urls = wp_extract_urls( $post_content );

		return array_filter( $urls, array( $this, 'is_supported_media' ) );
	}

	/**
	 * @return string
	 */
	private function get_item_data_key( $url ) {
		return md5( trim( $url ) );
	}

	/**
	 * @return array|mixed
	 */
	public function get_cache( $post_id ) {
		$cache = get_post_meta( $post_id, self::META_KEY, true );

		return empty( $cache ) ? array() : $cache;
	}

	/**
	 * @return bool|int
	 */
	private function set_cache( $post_id, $value ) {
		return update_post_meta( $post_id, self::META_KEY, $value );
	}

	/**
	 * @return bool
	 */
	private function delete_cache( $post_id ) {
		return delete_post_meta( $post_id, self::META_KEY );
	}

	/**
	 * @return array
	 */
	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 )
		);
	}

	/**
	 * @return array
	 */
	private function prepare_oembed_data( $url, $data ) {
		if ( ! $data ) {
			return array();
		}

		$data->url = $url;

		return (array) $data;
	}

	/**
	 * @return \WP_oEmbed
	 */
	private function get_oembed() {
		if ( ! class_exists( '\WP_oEmbed' ) ) {
			require_once ABSPATH . WPINC . '/class-oembed.php';
		}

		return new \WP_oEmbed();
	}

	/**
	 * @return bool
	 */
	private function url_has_domain( $url, $domains ) {
		$domains = join( '|', array_map( 'preg_quote', $domains ) );

		return (bool) preg_match( "~http(s)?://([^.]*.)?($domains).*~", $url );
	}

	/**
	 * @return bool
	 */
	private function is_youtube_url( $url ) {
		return $this->url_has_domain( $url, array( 'youtube.com', 'youtu.be' ) );
	}

	/**
	 * @return bool
	 */
	private function is_supported_media( $url ) {
		return $this->url_has_domain(
			$url,
			array_merge(
				$this->get_supported_video_domains(),
				$this->get_supported_audio_domains()
			)
		);
	}

	/**
	 * @return bool
	 */
	private function is_supported_video( $url ) {
		return $this->url_has_domain( $url, $this->get_supported_video_domains() );
	}

	/**
	 * @return bool
	 */
	private function is_supported_audio( $url ) {
		return $this->url_has_domain( $url, $this->get_supported_audio_domains() );
	}

	/**
	 * @return string[]
	 */
	private function get_supported_audio_domains() {
		return array(
			'soundcloud.com',
			'mixcloud.com',
			'spotify.com',
		);
	}

	/**
	 * @return string[]
	 */
	private function get_supported_video_domains() {
		return array(
			'ted.com',
			'vimeo.com',
			'dailymotion.com',
			'videopress.com',
			'vine.com',
			'youtube.com',
			'youtu.be',
		);
	}
}