<?php
/**
 * nLingual Uninstall Logic
 *
 * @package nLingual
 *
 * @since 2.3.0
 */

namespace nLingual;

/**
 * The Plugin Uninstaller
 *
 * Handles removal of tables and options created by the plugin.
 *
 * @internal Automatically called within this file.
 *
 * @since 2.3.0
 */
final class Uninstaller {
	/**
	 * Run the uninstallation.
	 *
	 * Will check for Multisite and run uninstall() for each blog.
	 *
	 * @since 2.3.0
	 */
	public static function run() {
		// Abort if not running in the WordPress context.
		if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
			die( 'Must be run within WordPress context.' );
		}

		// Also abort if (somehow) it's some other plugin being uninstalled
		if ( WP_UNINSTALL_PLUGIN != basename( __DIR__ ) . '/nlingual.php' ) {
			die( sprintf( 'Illegal attempt to uninstall nLingual while uninstalling %s.', WP_UNINSTALL_PLUGIN ) );
		}

		// Check if this site is a Multisite installation
		if ( is_multisite() ) {
			// Run through each blog and perform the uninstall on each one
			$sites = get_sites( array(
				'fields' => 'ids',
			) );

			foreach ( $sites as $site ) {
				switch_to_blog( $site );

				self::uninstall();

				restore_current_blog();
			}
		} else {
			self::uninstall();
		}
	}

	/**
	 * Perform the actual uninstallation.
	 *
	 * Delete all tables and all options created by nLingual.
	 *
	 * @since 2.3.0
	 */
	public static function uninstall() {
		global $wpdb;

		// Delete the object and string translation tables
		$wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}nl_translations" );
		$wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}nl_localizations" );

		// And delete all options that may exist
		foreach ( array(
			'options',
			'languages',
			'database_version',
			'upgraded',
			'upgraded_options',
			'upgraded_tables',
		) as $option ) {
			delete_option( "nlingual_{$option}" );
		}
	}
}

Uninstaller::run();