<?php
namespace AcademyStarter;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
class Helper {

	/**
	 * Get the instance of the class
	 *
	 * @return void
	 */
	public static function get_wordpress_importer() {
		require_once ABSPATH . 'wp-content/plugins/wordpress-importer/php-toolkit/load.php';
		require_once ABSPATH . 'wp-content/plugins/wordpress-importer/class-wp-import.php';
		require_once ABSPATH . 'wp-content/plugins/wordpress-importer/parsers/class-wxr-parser.php';
		require_once ABSPATH . 'wp-content/plugins/wordpress-importer/parsers/class-wxr-parser-simplexml.php';
		require_once ABSPATH . 'wp-content/plugins/wordpress-importer/parsers/class-wxr-parser-xml.php';
	}

	/**
	 * @param int $course_id
	 * @param int $user_id
	 * @return string
	 */
	public static function get_certificate_hash( $course_id, $user_id ) {
		return esc_html( substr( md5( $course_id . $user_id ), -8 ) );
	}

	/**
	 * Get the formatted date string to be used on a Certificate.
	 *
	 * @param  string $course_end_date The course end date to use.
	 *
	 * @return string The formatted date string.
	 */
	public static function get_certificate_formatted_date( $course_end_date ) {
		$default_date_format = get_option( 'date_format' );

		/**
		 * Filter the date format to be used for certificates. The date format
		 * syntax should be the format required by PHP's `date()` function.
		 *
		 * @param  string $default_date_format The default date format to be used.
		 * @return string The date format to use.
		 */
		$date_format = apply_filters( 'academy_certificate_date_format', $default_date_format );

		/*
		 * For backwards compatibility, check if we're using a strftime format
		 * string for a non-English locale.
		 */
		$should_use_strftime = ( false === strpos( get_locale(), 'en' ) )
			&& self::date_format_is_for_strftime( $date_format );

		if ( $should_use_strftime ) {
			setlocale( LC_TIME, get_locale() );
			return strftime( $date_format, strtotime( $course_end_date ) );
		}

		return date_i18n( $date_format, strtotime( $course_end_date ) );
	}

	/**
	 * Checks whether a date format string is meant for `strftime()` instead of
	 * `date()`.
	 *
	 * @param  string $date_format The date format.
	 *
	 * @return boolean true if the date format should be used with `strftime()`.
	 */
	private static function date_format_is_for_strftime( $date_format ) {
		return preg_match(
			'/%(a|A|d|e|j|u|w|U|V|W|b|B|h|m|C|g|G|y|Y|H|k|I|l|M|p|P|r|R|S|T|X|z|Z|c|D|F|s|x|n|t|%)/',
			$date_format
		);
	}

	public static function get_installed_plugins() {
		if ( ! function_exists( 'get_plugins' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}
		return (array) get_plugins();
	}

	public static function get_active_plugins() {
		$active_plugins = (array) get_option( 'active_plugins', array() );
		if ( is_multisite() ) {
			$active_plugins = array_merge( $active_plugins, get_site_option( 'active_sitewide_plugins', array() ) );
		}
		return $active_plugins;
	}

	public static function check_plugin_status( $plugin_base_name ) {
		$active_plugins = self::get_active_plugins();
		$installed_plugins = self::get_installed_plugins();
		if ( in_array( $plugin_base_name, $active_plugins, true ) || array_key_exists( $plugin_base_name, $active_plugins ) ) {
			return 'active';
		} elseif ( in_array( $plugin_base_name, $installed_plugins, true ) || array_key_exists( $plugin_base_name, $installed_plugins ) ) {
			return 'installed';
		} else {
			return 'not installed';
		}
	}

	public static function academyst_get_post_by_title( $title, $post_type = 'page' ) {
		global $wpdb;

		$post_id = $wpdb->get_var(
			$wpdb->prepare(
				"SELECT ID FROM {$wpdb->posts}
				WHERE post_title = %s
				AND post_type = %s
				AND post_status NOT IN ('trash', 'auto-draft')
				LIMIT 1",
				$title,
				$post_type
			)
		);

		return $post_id ? get_post( $post_id ) : null;
	}

}