<?php
/**
 * Admin screens (spec §6): one top-level page, admin.php?page=mench-migrate, with the dashboard in the Mench workspace
 * shell and tabs for Export, Import, Backups, Add-ons and Settings (filter mench_migrate_admin_tabs). The screens talk
 * to the REST API from assets/admin.js; only Settings posts a form (admin-post.php, nonce, capability).
 *
 * On our page every third-party admin notice is removed (owner rule, mench-admin-ui §3); our own notices hook
 * mench_migrate_admin_notices and render inside the layout.
 *
 * @package Mench_Migrate
 */

defined( 'ABSPATH' ) || exit;

final class Mench_Migrate_Admin {

	public const PAGE     = 'mench-migrate';
	public const SETTINGS = 'mench_migrate_settings';

	/** Notice hooks cleared on our page. */
	private const NOTICE_HOOKS = [ 'admin_notices', 'all_admin_notices', 'network_admin_notices', 'user_admin_notices' ];

	/** The page hook add_menu_page returned (toplevel_page_mench-migrate). */
	public static string $hook = '';

	public static function init(): void {
		add_action( 'admin_menu', [ self::class, 'menu' ] );
		add_action( 'admin_enqueue_scripts', [ self::class, 'assets' ] );
		add_action( 'in_admin_header', [ self::class, 'clean_notices' ], 1000 );
		add_action( 'admin_post_mench_migrate_save_settings', [ self::class, 'save_settings' ] );
	}

	public static function capability(): string {
		return (string) apply_filters( 'mench_migrate_capability', 'manage_options' );
	}

	public static function menu(): void {
		$icon       = 'data:image/svg+xml;base64,' . base64_encode( (string) file_get_contents( MENCH_MIGRATE_DIR . 'assets/icon.svg' ) ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions,WordPress.WP.AlternativeFunctions
		self::$hook = (string) add_menu_page(
			__( 'Mench Migrate', 'mench-migrate' ),
			__( 'Mench Migrate', 'mench-migrate' ),
			self::capability(),
			self::PAGE,
			[ self::class, 'render_page' ],
			$icon,
			80
		);
	}

	/** True on our page under any parent menu title. */
	public static function is_our_screen( ?WP_Screen $screen = null ): bool {
		if ( null === $screen && function_exists( 'get_current_screen' ) ) {
			$screen = get_current_screen();
		}
		if ( ! $screen instanceof WP_Screen ) {
			return false;
		}
		$suffix = '_page_' . self::PAGE;
		return substr( $screen->id, -strlen( $suffix ) ) === $suffix;
	}

	/** in_admin_header, priority 1000: only our notices on our page; every other screen is untouched. */
	public static function clean_notices(): void {
		if ( ! self::is_our_screen() ) {
			return;
		}
		foreach ( self::NOTICE_HOOKS as $hook ) {
			remove_all_actions( $hook );
		}
	}

	/**
	 * Our own notices (and our messages about plugins we depend on), from Mench Migrate and its add-ons. Rendered once,
	 * inside our layout by render_page(); not re-added to admin_notices, so they never show twice.
	 */
	public static function our_notices(): void {
		do_action( 'mench_migrate_admin_notices' );
	}

	public static function assets( $hook_suffix ): void {
		$ours = '' !== self::$hook ? self::$hook : 'toplevel_page_' . self::PAGE;
		if ( $ours !== $hook_suffix ) {
			return;
		}
		$ver = static fn( string $file ): string => MENCH_MIGRATE_VERSION . '.' . (int) @filemtime( MENCH_MIGRATE_DIR . $file ); // phpcs:ignore WordPress.PHP.NoSilencedErrors
		wp_enqueue_style( 'mench-migrate-admin', MENCH_MIGRATE_URL . 'assets/admin.css', [], $ver( 'assets/admin.css' ) );
		wp_enqueue_script( 'mench-migrate-admin', MENCH_MIGRATE_URL . 'assets/admin.js', [], $ver( 'assets/admin.js' ), true );
		// JSON keeps chunkSize a number (wp_localize_script would turn top-level scalars into strings).
		wp_add_inline_script( 'mench-migrate-admin', 'var MenchMigrate = ' . wp_json_encode( self::script_config() ) . ';', 'before' );
	}

	/** window.MenchMigrate: REST root, nonce, chunk size, this site's host and every string the script shows. */
	public static function script_config(): array {
		return [
			'root'      => esc_url_raw( rest_url( Mench_Migrate_Rest::NS ) ),
			'nonce'     => wp_create_nonce( 'wp_rest' ),
			'chunkSize' => Mench_Migrate_Rest_Uploads::CHUNK,
			'host'      => (string) wp_parse_url( home_url(), PHP_URL_HOST ),
			'adminUrl'  => esc_url_raw( self::url() ),
			'loginUrl'  => esc_url_raw( wp_login_url() ),
			'permalinksUrl' => esc_url_raw( admin_url( 'options-permalink.php' ) ),
			'resumeJob' => self::resume_job(),
			'storageLabels' => self::storage_labels(), // The export checklist's "Uploading to …" row.
			'phases'    => self::phases(),
			'i18n'      => [
				'exportTitle'     => __( 'Exporting this site', 'mench-migrate' ),
				'importTitle'     => __( 'Importing a site', 'mench-migrate' ),
				'restoreTitle'    => __( 'Restoring a backup', 'mench-migrate' ),
				'starting'        => __( 'Starting…', 'mench-migrate' ),
				/* translators: %s: a duration such as "2 min". */
				'elapsed'         => __( 'Elapsed %s', 'mench-migrate' ),
				/* translators: %s: a percentage number. */
				'percent'         => __( '%s%% complete', 'mench-migrate' ),
				'cancel'          => __( 'Cancel', 'mench-migrate' ),
				'close'           => __( 'Close', 'mench-migrate' ),
				'resume'          => __( 'Resume', 'mench-migrate' ),
				/* translators: %s: seconds until the next try. */
				'retrying'        => __( 'Connection lost. Retrying in %s s…', 'mench-migrate' ),
				'networkFailed'   => __( 'The server could not be reached. Check your connection, then choose Resume.', 'mench-migrate' ),
				/* translators: %s: backup name. */
				'exportDone'      => __( 'Export complete: %s', 'mench-migrate' ),
				/* translators: %s: number of files. */
				'exportSkipped'   => __( '%s files could not be read and were left out.', 'mench-migrate' ),
				'download'        => __( 'Download', 'mench-migrate' ),
				'viewBackups'     => __( 'View backups', 'mench-migrate' ),
				/* translators: %s: date and time the rollback copy is deleted. */
				'importDone'      => __( 'Import complete. Rollback is available until %s.', 'mench-migrate' ),
				'importDoneNoRb'  => __( 'Import complete.', 'mench-migrate' ),
				'keep'            => __( 'Keep this site', 'mench-migrate' ),
				'rollback'        => __( 'Roll back', 'mench-migrate' ),
				'kept'            => __( 'The imported site is kept and the rollback copy was removed.', 'mench-migrate' ),
				'rollbackSignIn'  => __( 'Sign in with an administrator of the imported site to roll back.', 'mench-migrate' ),
				'rolledBack'      => __( 'The site was rolled back to how it was before the import.', 'mench-migrate' ),
				'rollingBack'     => __( 'Rolling back…', 'mench-migrate' ),
				'reload'          => __( 'Reload the page', 'mench-migrate' ),
				'relogin'         => __( 'You are still signed in, now with your account from the imported site.', 'mench-migrate' ),
				'loginNotice'     => __( 'Your account is not in the imported site. Sign in again with an administrator account from the imported site.', 'mench-migrate' ),
				'replaced'        => __( "This site has been replaced by the imported one. Sign in with the imported site's administrator account to finish.", 'mench-migrate' ),
				'signIn'          => __( 'Sign in', 'mench-migrate' ),
				'cancelled'       => __( 'The job was cancelled. Nothing on this site was changed.', 'mench-migrate' ),
				'cancelledAfterSwap' => __( 'the import was stopped after it had started switching the site', 'mench-migrate' ),
				'rollbackNeeded'  => __( 'The import had already started switching this site, so it cannot be resumed. Roll back to put the site back as it was before the import.', 'mench-migrate' ),
				'startAgain'      => __( 'Start the import again and enter the archive’s password.', 'mench-migrate' ),
				/* translators: %s: the error message. */
				'failed'          => __( 'The job stopped: %s', 'mench-migrate' ),
				'reportTitle'     => __( 'Compatibility check', 'mench-migrate' ),
				'blocking'        => __( 'Must be fixed before importing', 'mench-migrate' ),
				'warnings'        => __( 'Warnings', 'mench-migrate' ),
				'noIssues'        => __( 'No compatibility problems were found.', 'mench-migrate' ),
				'understand'      => __( 'I understand this will replace this site', 'mench-migrate' ),
				/* translators: %s: this site's host name. */
				'typeHost'        => __( 'Type %s to confirm', 'mench-migrate' ),
				'confirm'         => __( 'Confirm and import', 'mench-migrate' ),
				/* translators: 1: size uploaded, 2: size in all. */
				'uploading'       => __( 'Uploading %1$s of %2$s', 'mench-migrate' ),
				/* translators: %s: a size such as "4 MB" (per second). */
				'speed'           => __( '%s/s', 'mench-migrate' ),
				/* translators: %s: size uploaded so far. */
				'uploadPaused'    => __( 'Upload paused at %s. Choose Resume to continue.', 'mench-migrate' ),
				'diskFull'        => __( 'The server ran out of disk space. Free some space, then choose Resume.', 'mench-migrate' ),
				'badFile'         => __( 'Choose a .mmig or .wpress archive.', 'mench-migrate' ),
				'uploaded'        => __( 'Upload complete. Starting the import…', 'mench-migrate' ),
				'loading'         => __( 'Loading…', 'mench-migrate' ),
				'noBackups'       => __( 'No backups yet. Export this site to create the first one.', 'mench-migrate' ),
				'loadFailed'      => __( 'The list could not be loaded.', 'mench-migrate' ),
				'encrypted'       => __( 'Encrypted', 'mench-migrate' ),
				'restore'         => __( 'Restore', 'mench-migrate' ),
				'delete'          => __( 'Delete', 'mench-migrate' ),
				/* translators: %s: backup name. */
				'deleteConfirm'   => __( 'Delete %s permanently? This cannot be undone.', 'mench-migrate' ),
				'deleteYes'       => __( 'Delete permanently', 'mench-migrate' ),
				/* translators: %s: backup name. */
				'deleted'         => __( '%s was deleted.', 'mench-migrate' ),
				'restoreNeedsPart' => __( 'Choose at least one part to restore.', 'mench-migrate' ),
				'testing'         => __( 'Testing…', 'mench-migrate' ),
				'pwMismatch'      => __( 'The passwords do not match.', 'mench-migrate' ),
				'needInclude'     => __( 'Choose at least one part of the site to export.', 'mench-migrate' ),
				'phaseUpload'     => __( 'Uploading', 'mench-migrate' ),
				'phaseDownload'   => __( 'Downloading', 'mench-migrate' ),
				/* translators: %s: storage name, e.g. Cloud storage. */
				'phaseUploadTo'   => __( 'Uploading to %s', 'mench-migrate' ),
				'stepDone'        => __( 'done', 'mench-migrate' ),
				'stepCurrent'     => __( 'in progress', 'mench-migrate' ),
				'stepPending'     => __( 'not started', 'mench-migrate' ),
				'stepFailed'      => __( 'stopped', 'mench-migrate' ),
				/* translators: 1: files done, 2: files in all. */
				'countFiles'      => __( 'Files %1$s of %2$s', 'mench-migrate' ),
				/* translators: %s: number of files found so far. */
				'countFound'      => __( 'Found %s files', 'mench-migrate' ),
				/* translators: 1: current table, 2: tables in all. */
				'countTable'      => __( 'table %1$s of %2$s', 'mench-migrate' ),
				/* translators: %s: number of rows. */
				'countRows'       => __( '%s rows', 'mench-migrate' ),
				/* translators: 1: links checked, 2: links in all. */
				'countLinks'      => __( 'Links %1$s of %2$s', 'mench-migrate' ),
				/* translators: 1: size done, 2: size in all, e.g. "312 MB of 1.2 GB". */
				'countBytes'      => __( '%1$s of %2$s', 'mench-migrate' ),
				'database'        => __( 'Database', 'mench-migrate' ),
				/* translators: %s: a duration such as "2 min". */
				'eta'             => __( 'about %s left', 'mench-migrate' ),
				/* translators: %s: seconds. */
				'etaSeconds'      => __( '%s s', 'mench-migrate' ),
				/* translators: %s: minutes. */
				'etaMinutes'      => __( '%s min', 'mench-migrate' ),
				/* translators: 1: hours, 2: minutes. */
				'etaHours'        => __( '%1$s h %2$s min', 'mench-migrate' ),
				'stepsLabel'      => __( 'Steps', 'mench-migrate' ),
				'downloadHint'    => __( 'Your browser shows the download’s progress.', 'mench-migrate' ),
				'linksTitle'      => __( 'Links checked', 'mench-migrate' ),
				'linksAllOk'      => __( 'All links work — no need to re-save permalinks.', 'mench-migrate' ),
				'linksFailed'     => __( 'Some links did not respond as expected', 'mench-migrate' ),
				'linksFix'        => __( 'Saving the permalinks once usually fixes it: open the Permalinks settings and choose Save Changes, then check again.', 'mench-migrate' ),
				'linksUnchecked'  => __( 'Some links could not be checked', 'mench-migrate' ),
				'linkNotChecked'  => __( 'Not checked (timed out)', 'mench-migrate' ),
				'linksNone'       => __( 'The links could not be checked.', 'mench-migrate' ),
				'linkOk'          => __( 'Works', 'mench-migrate' ),
				'linkBad'         => __( 'Did not respond as expected', 'mench-migrate' ),
				'linkUnreachable' => __( 'no answer', 'mench-migrate' ),
				'openPermalinks'  => __( 'Open Permalinks settings', 'mench-migrate' ),
				'checkAgain'      => __( 'Check again', 'mench-migrate' ),
				'checking'        => __( 'Checking…', 'mench-migrate' ),
				'protOk'          => __( 'Backups protected', 'mench-migrate' ),
				'protWarn'        => __( 'Check backup protection', 'mench-migrate' ),
				'protUnknown'     => __( 'Backup protection could not be checked', 'mench-migrate' ),
				'sizeUnits'       => [ __( 'B', 'mench-migrate' ), __( 'KB', 'mench-migrate' ), __( 'MB', 'mench-migrate' ), __( 'GB', 'mench-migrate' ), __( 'TB', 'mench-migrate' ) ],
				'stages'          => [
					'queued'           => __( 'Waiting to start', 'mench-migrate' ),
					'awaiting_confirm' => __( 'Waiting for your confirmation', 'mench-migrate' ),
				],
			],
		];
	}

	/**
	 * Rows of the dialog's step checklist per job type, each with the stage keys (Mench_Migrate_Progress::KEYS) it
	 * covers. The import's first row is labelled Uploading or Downloading by the script, and only shown when used.
	 */
	/** @return array<string,string> Each registered storage's short label by id. */
	public static function storage_labels(): array {
		$out = [];
		foreach ( Mench_Migrate_Storages::all() as $storage ) {
			$out[ $storage->id() ] = self::short_label( $storage->label() );
		}
		return $out;
	}

	/** A storage label without its bracketed detail: "Cloud storage (S3-compatible)" → "Cloud storage". */
	public static function short_label( string $label ): string {
		$short = trim( (string) preg_replace( '/\s*\([^)]*\)\s*$/', '', $label ) );
		return '' !== $short ? $short : $label;
	}

	public static function phases(): array {
		return [
			'export' => [
				[ 'id' => 'scan', 'label' => __( 'Scanning files', 'mench-migrate' ), 'keys' => [ 'init', 'scan' ] ],
				[ 'id' => 'db', 'label' => __( 'Database', 'mench-migrate' ), 'keys' => [ 'db' ] ],
				[ 'id' => 'pack', 'label' => __( 'Packing files', 'mench-migrate' ), 'keys' => [ 'write-files' ] ],
				[ 'id' => 'finish', 'label' => __( 'Finishing', 'mench-migrate' ), 'keys' => [ 'finalize', 'storage' ] ],
			],
			'import' => [
				[ 'id' => 'transfer', 'label' => '', 'keys' => [ 'download' ] ],
				[ 'id' => 'check', 'label' => __( 'Checking', 'mench-migrate' ), 'keys' => [ 'open', 'preflight' ] ],
				[ 'id' => 'db', 'label' => __( 'Database', 'mench-migrate' ), 'keys' => [ 'convert', 'db-create', 'db-rows' ] ],
				[ 'id' => 'files', 'label' => __( 'Files', 'mench-migrate' ), 'keys' => [ 'files' ] ],
				[ 'id' => 'swap', 'label' => __( 'Switching', 'mench-migrate' ), 'keys' => [ 'swap' ] ],
				[ 'id' => 'finish', 'label' => __( 'Finishing', 'mench-migrate' ), 'keys' => [ 'finalize', 'verify-links' ] ],
			],
		];
	}

	/** The ?job= of the Import tab after signing in again: a well-formed job id, or ''. admin.js resumes it while it runs. */
	public static function resume_job(): string {
		$id = isset( $_GET['job'] ) && is_string( $_GET['job'] ) ? wp_unslash( $_GET['job'] ) : ''; // phpcs:ignore WordPress.Security.NonceVerification,WordPress.Security.ValidatedSanitizedInput -- validated by the regex.
		return 'import' === self::current_tab() && preg_match( '/^[A-Za-z0-9][A-Za-z0-9_-]{0,63}$/', $id ) ? $id : '';
	}

	/** "Manage licence" target: the add-on's own <slug>-license page when it registered one, otherwise Plugins. */
	public static function licence_url( string $addon_id ): string {
		global $menu, $submenu;
		$page = sanitize_key( $addon_id ) . '-license';
		$seen = [];
		foreach ( (array) $menu as $item ) {
			$seen[] = $item[2] ?? '';
		}
		foreach ( (array) $submenu as $items ) {
			foreach ( (array) $items as $item ) {
				$seen[] = $item[2] ?? '';
			}
		}
		return in_array( $page, $seen, true ) ? add_query_arg( 'page', $page, admin_url( 'admin.php' ) ) : admin_url( 'plugins.php' );
	}

	public static function url( string $tab = '' ): string {
		return add_query_arg( array_filter( [ 'page' => self::PAGE, 'tab' => $tab ] ), admin_url( 'admin.php' ) );
	}

	/** The current tab: '' (dashboard) or a registered tab slug. */
	public static function current_tab(): string {
		$tab = isset( $_GET['tab'] ) && is_string( $_GET['tab'] ) ? sanitize_key( wp_unslash( $_GET['tab'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification
		return array_key_exists( $tab, Mench_Migrate_Plugin::admin_tabs() ) ? $tab : '';
	}

	/** Settings with defaults: keep_rollback_hours (int ≥ 1, default 24), delete_backups_on_uninstall (bool). */
	public static function settings(): array {
		return self::sanitize_settings( (array) get_option( self::SETTINGS, [] ) );
	}

	public static function sanitize_settings( $input ): array {
		$input = is_array( $input ) ? $input : [];
		$raw   = $input['keep_rollback_hours'] ?? null;
		$hours = is_scalar( $raw ) && is_numeric( trim( (string) $raw ) ) ? (int) $raw : 24; // Anything non-numeric keeps the default.
		return [
			'keep_rollback_hours'         => max( 1, min( 720, $hours ) ),
			'delete_backups_on_uninstall' => ! empty( $input['delete_backups_on_uninstall'] ),
		];
	}

	/** admin-post.php?action=mench_migrate_save_settings. */
	public static function save_settings(): void {
		if ( ! current_user_can( self::capability() ) ) {
			wp_die( esc_html__( 'You are not allowed to change these settings.', 'mench-migrate' ), 403 );
		}
		check_admin_referer( 'mench_migrate_save_settings' );
		$raw = isset( $_POST[ self::SETTINGS ] ) ? wp_unslash( $_POST[ self::SETTINGS ] ) : []; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput -- sanitize_settings() below.
		update_option( self::SETTINGS, self::sanitize_settings( $raw ), false );
		wp_safe_redirect( add_query_arg( 'updated', '1', self::url( 'settings' ) ) );
		exit;
	}

	/** The page: workspace header, tabs, then the current tab's view. */
	public static function render_page(): void {
		if ( ! current_user_can( self::capability() ) ) {
			wp_die( esc_html__( 'You are not allowed to use Mench Migrate.', 'mench-migrate' ), 403 );
		}
		$tab       = self::current_tab();
		$tabs      = Mench_Migrate_Plugin::admin_tabs();
		$protected = Mench_Migrate_Paths::web_protected();
		?>
		<div class="wrap mmg-admin" id="mmg-admin">
			<header class="mmg-header">
				<div class="mmg-brand">
					<span class="mmg-icon-tile" aria-hidden="true"><?php echo self::icon_markup(); // phpcs:ignore WordPress.Security.EscapeOutput -- static SVG from our assets. ?></span>
					<div>
						<span class="mmg-eyebrow"><?php echo esc_html( sprintf( /* translators: %s: version. */ __( 'Mench Migrate · %s', 'mench-migrate' ), MENCH_MIGRATE_VERSION ) ); ?></span>
						<h1><?php esc_html_e( 'Mench Migrate', 'mench-migrate' ); ?></h1>
						<p><?php esc_html_e( 'Move, back up and restore this site — any size, restore included.', 'mench-migrate' ); ?></p>
					</div>
				</div>
				<?php if ( true === $protected ) : ?>
					<span class="mmg-badge mmg-badge--ok" id="mmg-protection"><?php esc_html_e( 'Backups protected', 'mench-migrate' ); ?></span>
				<?php elseif ( false === $protected ) : ?>
					<span class="mmg-badge mmg-badge--warn" id="mmg-protection"><?php esc_html_e( 'Check backup protection', 'mench-migrate' ); ?></span>
				<?php else : // Not known yet: admin.js asks GET /protection after the page has loaded. ?>
					<span class="mmg-badge mmg-badge--muted" id="mmg-protection" data-mmg-probe="pending" role="status"><?php esc_html_e( 'Checking backup protection…', 'mench-migrate' ); ?></span>
				<?php endif; ?>
			</header>
			<nav class="mmg-tabs" aria-label="<?php esc_attr_e( 'Mench Migrate sections', 'mench-migrate' ); ?>">
				<a href="<?php echo esc_url( self::url() ); ?>"<?php echo '' === $tab ? ' aria-current="page"' : ''; ?>><?php esc_html_e( 'Dashboard', 'mench-migrate' ); ?></a>
				<?php foreach ( $tabs as $slug => $label ) : ?>
					<a href="<?php echo esc_url( self::url( $slug ) ); ?>"<?php echo $slug === $tab ? ' aria-current="page"' : ''; ?>><?php echo esc_html( $label ); ?></a>
				<?php endforeach; ?>
			</nav>
			<hr class="wp-header-end">
			<div class="mmg-notices" role="region" aria-label="<?php esc_attr_e( 'Messages', 'mench-migrate' ); ?>"><?php self::our_notices(); ?></div>
			<?php
			$core = [ 'export', 'import', 'backups', 'addons', 'settings' ];
			if ( '' === $tab ) {
				self::view( 'dashboard', [ 'protected' => $protected ] );
			} elseif ( in_array( $tab, $core, true ) ) {
				self::view( $tab );
			} else {
				do_action( 'mench_migrate_admin_tab_' . $tab ); // An add-on's own tab.
			}
			self::dialog();
			?>
		</div>
		<?php
	}

	/** Includes includes/admin/views/<name>.php with $args extracted as $view. */
	private static function view( string $name, array $view = [] ): void {
		include MENCH_MIGRATE_DIR . 'includes/admin/views/' . $name . '.php';
	}

	/** The progress dialog every flow shares; admin.js fills it. */
	private static function dialog(): void {
		?>
		<div class="mmg-backdrop" id="mmg-dialog-backdrop" hidden>
			<div class="mmg-dialog" id="mmg-dialog" role="dialog" aria-modal="true" aria-labelledby="mmg-dialog-title" aria-describedby="mmg-dialog-stage" tabindex="-1">
				<h2 id="mmg-dialog-title"><?php esc_html_e( 'Working…', 'mench-migrate' ); ?></h2>
				<p class="mmg-dialog-stage" id="mmg-dialog-stage" aria-live="polite" aria-atomic="true"></p>
				<div class="mmg-progress" role="progressbar" aria-labelledby="mmg-dialog-title" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><span class="mmg-progress-bar"></span></div>
				<p class="mmg-dialog-meta"><span class="mmg-dialog-percent"></span><span class="mmg-dialog-elapsed"></span></p>
				<p class="mmg-dialog-counts"></p>
				<p class="mmg-dialog-rate"></p>
				<ol class="mmg-steps" id="mmg-dialog-steps" aria-label="<?php esc_attr_e( 'Steps', 'mench-migrate' ); ?>" hidden></ol>
				<div class="mmg-dialog-body" id="mmg-dialog-body"></div>
				<div class="mmg-dialog-actions" id="mmg-dialog-actions"></div>
			</div>
		</div>
		<?php
	}

	/** The menu icon inline, filled with the current colour. */
	public static function icon_markup(): string {
		$svg = (string) file_get_contents( MENCH_MIGRATE_DIR . 'assets/icon.svg' ); // phpcs:ignore WordPress.WP.AlternativeFunctions
		return str_replace( [ 'fill="black"', '<svg ' ], [ 'fill="currentColor"', '<svg focusable="false" ' ], trim( $svg ) );
	}

	/**
	 * Bytes as a short human size in decimal units (1 MB = 1,000,000 bytes), matching the admin JS and what macOS,
	 * browsers and S3/R2 consoles show for the same file. One decimal under 10 of a unit. Add-ons use this too.
	 */
	public static function size( $bytes ): string {
		$n     = max( 0, (float) $bytes );
		$units = [ 'B', 'KB', 'MB', 'GB', 'TB' ];
		$u     = 0;
		while ( $n >= 1000 && $u < count( $units ) - 1 ) {
			$n /= 1000;
			++$u;
		}
		return number_format_i18n( $u ? $n : round( $n ), $u && $n < 10 ? 1 : 0 ) . ' ' . $units[ $u ];
	}

	/** Local backups (cheap: one folder listing). */
	public static function local_backups(): array {
		try {
			return ( new Mench_Migrate_Storage_Local() )->list();
		} catch ( Throwable $e ) {
			return [];
		}
	}
}