Thread.from constructor

Thread.from(Map<String, dynamic> jThreadObj, Story storyContext)

Implementation

Thread.from(Map<String, dynamic> jThreadObj, Story storyContext) {
  callstack = <Element>[];

  threadIndex = jThreadObj['threadIndex'];

  List<dynamic> jThreadCallstack = jThreadObj['callstack'];

  for (var jElTok in jThreadCallstack) {
    Map<String, dynamic> jElementObj = jElTok;

    var pushPopType = PushPopType.values[jElementObj['type']];

    var pointer = Pointer.Null;

    String? currentContainerPathStr;
    dynamic currentContainerPathStrToken;
    currentContainerPathStrToken = jElementObj['cPath'];
    if (currentContainerPathStrToken != null) {
      currentContainerPathStr = currentContainerPathStrToken.toString();

      var threadPointerResult =
          storyContext.contentAtPath(Path(currentContainerPathStr));
      pointer = Pointer(
          container: threadPointerResult.container,
          index: jElementObj['idx'] ?? -1);

      if (threadPointerResult.obj == null) {
        throw Exception(
            "When loading state, internal story location couldn't be found: $currentContainerPathStr . Has the story changed since this save data was created?");
      } else if (threadPointerResult.approximate) {
        storyContext.warning(
            "When loading state, exact internal story location couldn't be found: '$currentContainerPathStr', so it was approximated to '" +
                pointer.container!.path.toString() +
                "' to recover. Has the story changed since this save data was created?");
      }
    }

    bool inExpressionEvaluation = jElementObj['exp'];
    var el = Element(pushPopType, pointer,
        inExpressionEvaluation: inExpressionEvaluation);

    if (jElementObj.containsKey('temp')) {
      el.temporaryVariables =
          JsonSerialization.JObjectToDictionaryRuntimeObjs(
              jElementObj['temp']);
    } else {
      el.temporaryVariables.clear();
    }
    callstack.add(el);
  }
  if (jThreadObj.containsKey('previousContentObject')) {
    var prevPath = Path(jThreadObj['previousContentObject']);
    previousPointer = storyContext.pointerAtPath(prevPath);
  }
}