{
		if ( is_front_page() || is_home() ) {
			return 'website';
		}

		if ( is_author() ) {
			return 'profile';
		}

		return $this->is_product() ? 'product' : 'article';
	}

	/**
	 * Outputs the SEO title as OpenGraph title.
	 *
	 * @copyright Copyright (C) 2008-2019, Yoast BV
	 * The following code is a derivative work of the code from the Yoast(https://github.com/Yoast/wordpress-seo/), which is licensed under GPL v3.
	 *
	 * @link https://developers.facebook.com/docs/reference/opengraph/object-type/article/
	 *
	 * @param bool $display Whether or not to echo the output.
	 *
	 * @return string
	 */
	public function title( $display = true ) {
		$title = trim( $this->get_title() );
		if ( $display ) {
			$this->tag( 'og:title', $title );
		}

		return $title;
	}

	/**
	 * Output the OpenGraph description, specific OG description first, if not, grab the meta description.
	 *
	 * @param bool $display Whether to echo or return the description.
	 * @return string
	 */
	public function description( $display = true ) {
		$desc = trim( $this->get_description() );
		if ( $display ) {
			$this->tag( 'og:description', $desc );
		}

		return $desc;
	}

	/**
	 * Output the canonical URL for the OpenGraph URL.
	 *
	 * @link https://developers.facebook.com/docs/reference/opengraph/object-type/article/
	 */
	public function url() {
		/**
		 * Filter the OpenGraph URL.
		 */
		$url = $this->do_filter( 'opengraph/url', esc_url( Paper::get()->get_canonical() ) );
		$this->tag( 'og:url', $url );
	}

	/**
	 * Output the site name straight from the blog info.
	 */
	public function site_name() {
		$this->tag( 'og:site_name', Helper::get_settings( 'titles.website_name', get_bloginfo( 'name' ) ) );
	}

	/**
	 * Outputs the websites FB page.
	 *
	 * @link https://developers.facebook.com/blog/post/2013/06/19/platform-updates--new-open-graph-tags-for-media-publishers-and-more/
	 * @link https://developers.facebook.com/docs/reference/opengraph/object-type/article/
	 */
	public function website() {
		$site = Helper::get_settings( 'titles.social_url_facebook' );
		if ( 'article' === $this->type( false ) && '' !== $site ) {
			$this->tag( 'article:publisher', $site );
		}
	}

	/**
	 * Outputs the site owner.
	 *
	 * @link https://developers.facebook.com/docs/reference/opengraph/object-type/article/
	 */
	public function site_owner() {
		$app_id = Helper::get_settings( 'titles.facebook_app_id' );
		if ( 0 !== absint( $app_id ) ) {
			$this->tag( 'fb:app_id', $app_id );
			return;
		}

		$admins = Helper::get_settings( 'titles.facebook_admin_id' );
		if ( '' !== trim( $admins ) ) {
			$this->tag( 'fb:admins', $admins );
			return;
		}
	}

	/**
	 * Create new Image class and get the images to set the `og:image`.
	 *
	 * @param string|bool $image Optional. Image URL.
	 */
	public function image( $image = false ) {
		$images = new Image( $image, $this );
		$images->show();
	}

	/**
	 * Outputs the authors FB page.
	 *
	 * @link https://developers.facebook.com/blog/post/2013/06/19/platform-updates--new-open-graph-tags-for-media-publishers-and-more/
	 * @link https://developers.facebook.com/docs/reference/opengraph/object-type/article/
	 */
	public function article_author() {
		$this->tag( 'article:author', $this->get_author() );
	}

	/**
	 * Output the article tags as `article:tag` tags.
	 */
	public function tags() {
		$tags = get_the_tags();
		if ( is_wp_error( $tags ) || empty( $tags ) ) {
			return;
		}

		foreach ( $tags as $tag ) {
			$this->tag( 'article:tag', $tag->name );
		}
	}

	/**
	 * Output the article category as an `article:section` tag.
	 */
	public function category() {
		$terms = get_the_category();
		if ( empty( $terms ) ) {
			return;
		}

		// We can only show one section here, so we take the first one.
		$this->tag( 'article:section', $terms[0]->name );
	}

	/**
	 * Output the article publish and last modification date.
	 */
	public function publish_date() {
		$post = get_post();
		$pub  = mysql2date( DATE_W3C, $post->post_date, false );
		$mod  = mysql2date( DATE_W3C, $post->post_modified, false );

		if ( strtotime( $mod ) > strtotime( $pub ) ) {
			$this->tag( 'og:updated_time', $mod );
		}
	}

	/**
	 * Get author.
	 *
	 * @return string
	 */
	private function get_author() {
		$author = Helper::get_user_meta( 'facebook_author', $GLOBALS['post']->post_author );
		if ( $author ) {
			return $author;
		}

		$author = get_user_meta( $GLOBALS['post']->post_author, 'facebook', true );
		if ( $author ) {
			return $author;
		}

		return Helper::get_settings( 'titles.facebook_author_urls' );
	}

	/**
	 * Is WooCommerce product
	 *
	 * @return bool
	 */
	private function is_product() {
		return function_exists( 'is_woocommerce' ) && function_exists( 'is_product' ) && is_product();
	}
}