<?php
/**
 * Removes all plugin data when the plugin is deleted from the Plugins screen.
 */

defined( 'WP_UNINSTALL_PLUGIN' ) || exit;

/**
 * Delete the plugin's data from the current site.
 */
function idownalert_uninstall_site() {
	global $wpdb;

	foreach ( array( 'settings', 'db_version', 'heartbeat_key', 'heartbeat_seen', 'blocked', 'baseline', 'findings', 'ignored', 'last_scan', 'accept_paths', 'scan_pending', 'scan_lock', 'dropins_sig' ) as $idownalert_option ) {
		delete_option( 'idownalert_' . $idownalert_option );
	}
	wp_unschedule_hook( 'idownalert_daily' );
	wp_unschedule_hook( 'idownalert_scan' );

	// phpcs:disable WordPress.DB.DirectDatabaseQuery, WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- cleanup of our own table and transients.
	$wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}idownalert_events" );
	$wpdb->query( "DELETE FROM {$wpdb->options} WHERE option_name LIKE '\\_transient\\_idownalert\\_%' OR option_name LIKE '\\_transient\\_timeout\\_idownalert\\_%'" );
	// phpcs:enable
}

/**
 * Remove the drop-ins (only ours) and the data folder in uploads.
 */
function idownalert_uninstall_files() {
	// WordPress loads drop-ins only from WP_CONTENT_DIR, so that is where ours are.
	foreach ( array( 'db-error.php', 'fatal-error-handler.php' ) as $idownalert_name ) {
		$idownalert_file = trailingslashit( WP_CONTENT_DIR ) . $idownalert_name;
		// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents -- local file.
		if ( file_exists( $idownalert_file ) && false !== strpos( (string) file_get_contents( $idownalert_file, false, null, 0, 1024 ), 'iDownAlert drop-in' ) ) {
			wp_delete_file( $idownalert_file );
		}
	}

	// The data folder is in the main site's uploads directory.
	$idownalert_switched = is_multisite() && ! is_main_site() && switch_to_blog( get_main_site_id() );
	$idownalert_uploads  = wp_upload_dir( null, false );
	if ( $idownalert_switched ) {
		restore_current_blog();
	}
	if ( empty( $idownalert_uploads['basedir'] ) ) {
		return;
	}
	$idownalert_dir = trailingslashit( $idownalert_uploads['basedir'] ) . 'idownalert';
	foreach ( array( 'config.php', 'state.json', 'db-down.flag', 'index.php', '.htaccess' ) as $idownalert_name ) {
		if ( file_exists( $idownalert_dir . '/' . $idownalert_name ) ) {
			wp_delete_file( $idownalert_dir . '/' . $idownalert_name );
		}
	}
	if ( is_dir( $idownalert_dir ) ) {
		@rmdir( $idownalert_dir ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_rmdir, WordPress.PHP.NoSilencedErrors.Discouraged -- may hold files we did not create.
	}
}

if ( is_multisite() ) {
	foreach ( get_sites(
		array(
			'fields' => 'ids',
			'number' => 0,
		)
	) as $idownalert_site_id ) {
		switch_to_blog( $idownalert_site_id );
		idownalert_uninstall_site();
		restore_current_blog();
	}
} else {
	idownalert_uninstall_site();
}
idownalert_uninstall_files();