<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}
/**
 *
 * Renders the [sensei_lesson_page] shortcode. Display a single lesson based on the ID parameter given.
 *
 * This class is loaded int WP by the shortcode loader class.
 *
 * @class Sensei_Shortcode_Lesson_Page
 *
 * @package Content
 * @subpackage Shortcode
 * @author Automattic
 *
 * @since 1.9.0
 */
class Sensei_Shortcode_Lesson_Page implements Sensei_Shortcode_Interface {

	/**
	 * @var array $lesson_page_query {
	 *     @type WP_Post
	 * }
	 * The lessons query
	 */
	protected $lesson_page_query;

	/**
	 * Setup the shortcode object
	 *
	 * @since 1.9.0
	 * @param array  $attributes
	 * @param string $content
	 * @param string $shortcode the shortcode that was called for this instance
	 */
	public function __construct( $attributes, $content, $shortcode ) {

		$this->id = isset( $attributes['id'] ) ? $attributes['id'] : '';
		$this->setup_lesson_query();

	}

	/**
	 * create the lessons query .
	 *
	 * @return mixed
	 */
	public function setup_lesson_query() {

		if ( empty( $this->id ) ) {
			return;
		}

		$args = array(
			'post_type'      => 'lesson',
			'posts_per_page' => 1,
			'post_status'    => 'publish',
			'post__in'       => array( $this->id ),
		);

		$this->lesson_page_query = new WP_Query( $args );

	}

	/**
	 * Rendering the shortcode this class is responsible for.
	 *
	 * @return string $content
	 */
	public function render() {

		if ( empty( $this->id ) ) {

			return __( 'Please supply a lesson ID for this shortcode.', 'woothemes-sensei' );

		}

		// set the wp_query to the current lessons query
		global $wp_query;
		$wp_query = $this->lesson_page_query;

		if ( have_posts() ) {

			the_post();

		} else {

			return __( 'No posts found.', 'woothemes-sensei' );

		}

		ob_start();
		Sensei_Templates::get_template( 'content-single-lesson.php' );
		$shortcode_output = ob_get_clean();

		// set back the global query
		wp_reset_query();

		return $shortcode_output;

	}//end render()

}//end class

