Future _instanceRefForRemote()

in dwds/lib/src/debugging/instance.dart [349:426]
68 lines of code
12 McCabe index (conditional complexity)

  Future<InstanceRef> _instanceRefForRemote(RemoteObject remoteObject) async {
    // If we have a null result, treat it as a reference to null.
    if (remoteObject == null) {
      return kNullInstanceRef;
    }

    switch (remoteObject.type) {
      case 'string':
        var stringValue = remoteObject.value as String;
        // TODO: Support truncation for long strings.
        // TODO(#777): dartIdFor() will return an ID containing the entire
        // string, even if we're truncating the string value here.
        return InstanceRef(
            identityHashCode: dartIdFor(remoteObject.value).hashCode,
            id: dartIdFor(remoteObject.value),
            classRef: classRefForString,
            kind: InstanceKind.kString)
          ..valueAsString = stringValue
          ..length = stringValue.length;
      case 'number':
        return _primitiveInstanceRef(InstanceKind.kDouble, remoteObject);
      case 'boolean':
        return _primitiveInstanceRef(InstanceKind.kBool, remoteObject);
      case 'undefined':
        return _primitiveInstanceRef(InstanceKind.kNull, remoteObject);
      case 'object':
        if (remoteObject.objectId == null) {
          return _primitiveInstanceRef(InstanceKind.kNull, remoteObject);
        }
        var metaData = await ClassMetaData.metaDataFor(
            inspector.remoteDebugger, remoteObject, inspector);
        if (metaData == null) return null;
        if (metaData.isSystemList) {
          return InstanceRef(
              kind: InstanceKind.kList,
              id: remoteObject.objectId,
              identityHashCode: remoteObject.objectId.hashCode,
              classRef: metaData.classRef)
            ..length = metaData.length;
        }
        if (metaData.isSystemMap) {
          return InstanceRef(
              kind: InstanceKind.kMap,
              id: remoteObject.objectId,
              identityHashCode: remoteObject.objectId.hashCode,
              classRef: metaData.classRef)
            ..length = metaData.length;
        }
        return InstanceRef(
            kind: InstanceKind.kPlainInstance,
            id: remoteObject.objectId,
            identityHashCode: remoteObject.objectId.hashCode,
            classRef: metaData.classRef);
      case 'function':
        var functionMetaData = await FunctionMetaData.metaDataFor(
            inspector.remoteDebugger, remoteObject);
        return InstanceRef(
            kind: InstanceKind.kClosure,
            id: remoteObject.objectId,
            identityHashCode: remoteObject.objectId.hashCode,
            classRef: classRefForClosure)
          // TODO(grouma) - fill this in properly.
          ..closureFunction = FuncRef(
              name: functionMetaData.name,
              id: createId(),
              // TODO(alanknight): The right ClassRef
              owner: classRefForUnknown,
              isConst: false,
              isStatic: false,
              // TODO(annagrin): get information about getters and setters from symbols.
              // https://github.com/dart-lang/sdk/issues/46723
              implicit: false)
          ..closureContext = (ContextRef(length: 0, id: createId()));
      default:
        // Return null for an unsupported type. This is likely a JS construct.
        return null;
    }
  }