fromJson static method

PluginManifest fromJson(Map<String, Object?> json)

Implementation

static PluginManifest fromJson(Map<String, Object?> json) {
  var version = json['version']! as int;
  if (version != manifestVersion) {
    throw FormatException(
      'Unsupported flutterware manifest version $version '
      '(this build understands $manifestVersion).',
    );
  }
  var plugins = [
    for (var p in (json['plugins']! as List).cast<Map<String, Object?>>())
      PluginDeclaration.fromJson(p),
  ];

  // Checked on the way *in*, not only on the way out. `FlutterwareConfig.use`
  // refuses both of these, but a manifest does not have to have come from
  // `Flutterware.configure` — and a reservation enforced on one side only is
  // a convention, which is not what [Address.shellConfig] claims to be. The
  // failure without this is silent either way: a duplicate id resolves one
  // plugin and drops another, and an id of `config` is shadowed by the
  // shell's own screen with the plugin simply unreachable.
  var seen = <String>{};
  for (var plugin in plugins) {
    if (!seen.add(plugin.id)) {
      throw FormatException('Plugin id "${plugin.id}" is declared twice.');
    }
    if (Address.shellOwned.contains(plugin.id)) {
      throw FormatException(
        'Plugin id "${plugin.id}" is reserved for one of the shell\'s own '
        'screens.',
      );
    }
    if (_duplicatePackagePath(plugin.config) case var path?) {
      throw FormatException(_duplicatePackageMessage(plugin.id, path));
    }
  }

  return PluginManifest(
    plugins,
    version: version,
    changes: switch (json['changes']) {
      Map<Object?, Object?> it => ChangesConfig.fromJson(
        it.cast<String, Object?>(),
      ),
      _ => null,
    },
    identity: switch (json['identity']) {
      Map<Object?, Object?> it => ProjectIdentity.fromJson(
        it.cast<String, Object?>(),
      ),
      _ => null,
    },
    clock: switch (json['clock']) {
      String it => DateTime.tryParse(it),
      _ => null,
    },
    network: switch (json['network']) {
      String it => ScenarioNetwork.values.firstWhereOrNull(
        (mode) => mode.name == it,
      ),
      _ => null,
    },
  );
}