<?php
/**
 * This file adds compatability between this theme and the 'Yoast SEO' plugin
 *
 * @see https://de.wordpress.org/plugins/wordpress-seo/
 * @package agncy
 */

/**
 * The class that adds compatibilty between "Yoast SEO" and this theme
 */
class AgncyYoastCompatibility {

	/**
	 * The class constructor. It constructs things.
	 *
	 * @access public
	 * @return void
	 */
	public function __construct() {
		// Only fire this class if the yoast plugin is really active.
		include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
		if ( is_plugin_active( 'wordpress-seo/wp-seo.php' ) ) {
			$this->action_dispatcher();
			$this->filter_dispatcher();
		}
	}

	/**
	 * Set the actions we need in this class.
	 *
	 * @access private
	 * @return void
	 */
	private function action_dispatcher() {

	}

	/**
	 * Set the filters we need in this class.
	 *
	 * @access private
	 * @return void
	 */
	private function filter_dispatcher() {
		add_filter( 'agncy_breadcrumb', array( $this, 'yoast_breadcrumbs' ) );
		add_filter( 'wpseo_sitemap_entry', array( $this, 'filter_content_templates' ), 10, 3 );
	}

	/**
	 * Check if the yoast breadcrumbs exist and if so return them.
	 *
	 * Yoast Breadcrumbs are awesome and we use them all the time. Thats why we
	 * filter them in our theme for some awesome use cases.
	 *
	 * @access public
	 * @return string The yoast breadcrumb
	 */
	public function yoast_breadcrumbs() {
		if ( function_exists( 'yoast_breadcrumb' ) ) {
			return yoast_breadcrumb( null, null, false );
		}
	}

	/**
	 * We don't want active content templates to show up in one pages.
	 *
	 * This function checks if the (yoast) type in question is a 'post' type and then
	 * checks if the $post object is a content template. If so it returns false.
	 *
	 * @access public
	 * @param array  $url  Array of URL parts.
	 * @param string $post_type URL type.
	 * @param object $post Data object for the URL.
	 * @return (string|bool) $url The filtered url or false
	 */
	public function filter_content_templates( $url, $post_type, $post ) {
		global $_lh_onepage;

		if ( 'post' === $post_type && $_lh_onepage->is_content_template( $post ) ) {
			return false;
		}

		return $url;
	}

}
new AgncyYoastCompatibility();