<?php
/**
 * MainWP Child Site Api Backups
 *
 * Manages MainWP API Backups child site actions when needed.
 *
 * @package MainWP\Child
 */

namespace MainWP\Child;

/**
 * Class MainWP_Child_Api_Backups
 *
 * This class handles all the MainWP API Backups child site actions when needed.
 *
 * @package MainWP\Child
 */
class MainWP_Child_Api_Backups {

	/**
	 * Public variable to state if supported plugin is installed on the child site.
	 *
	 * @var bool If supported plugin is installed, return true, if not, return false.
	 */
	public $is_plugin_installed = false;

	/**
	 * Public static variable to hold the single instance of the class.
	 *
	 * @var mixed Default null
	 */
	protected static $instance = null;

	/**
	 * Method instance()
	 *
	 * Create a public static instance.
	 *
	 * @return mixed Class instance.
	 */
	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}

		return self::$instance;
	}

	/**
	 * MainWP_Child_Api_Backups constructor.
	 *
	 * Run any time class is called.
	 */
	public function __construct() {
		// Constructor.
	}

	/**
	 * Create a backup of the database for the given child site.
	 *
	 * @return void
	 */
	public function api_backups_mysqldump() {

		// WordPress DB credentials.
		$database_name = DB_NAME;
		$user          = DB_USER;
		$pass          = DB_PASSWORD;

		// Remove ":" & all numbers from "Localhost:3306".
		$host = str_replace( ':', '', preg_replace( '/[0-9]+/', '', DB_HOST ) );

		// Get Site URL.
		$site_url = str_replace( '/', '.', preg_replace( '#^https?://#i', '', get_bloginfo( 'url' ) ) );

		// Create a timestamp.
		$current_date_time = current_datetime();
		$current_date_time = $current_date_time->format( 'm-d-Y_H.i.s.A' );

		// Build the uploads directory.
		$wp_get_upload_dir = wp_get_upload_dir();
		$wp_upload_dir     = $wp_get_upload_dir['basedir'] . '/mainwp/api_db_backups/';

		// Build the full path to the backup file.
		$gzip_full_path = $wp_upload_dir . $database_name . '_' . $site_url . '_' . $current_date_time . '.sql.gz';

		// Create the directory if it doesn't exist.
		if ( ! file_exists( $wp_upload_dir ) ) { //phpcs:ignore
			mkdir( $wp_upload_dir, 0755, true ); //phpcs:ignore
		}

		if ( function_exists( 'exec' ) ) {
			// Create the backup file. hide from logs ( password ).
			exec( "mysqldump --user={$user} --password='{$pass}' --host={$host} {$database_name} | gzip > {$gzip_full_path}", $output, $result ); //phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.system_calls_exec
		}

		// Check if the backup was successful.
		if ( 0 === $result ) {
			// Success.
			MainWP_Helper::write(
				array(
					'result' => 'GOOD',
					'output' => $output,
					'res'    => $result,
				)
			);
		} else {
			// Error.
			MainWP_Helper::write(
				array(
					'result' => 'ERROR',
					'output' => $output,
					'res'    => $result,
				)
			);
		}
	}
}