Function getVariableAtPath

newIDE/app/src/EditorFunctions/ApplyVariableChange.js:335–381

({
  variablePath,
  variablesContainer,
}: {|
  variablePath: string,
  variablesContainer: gd.VariablesContainer,
|})

};

export const getVariableAtPath = ({
  variablePath,
  variablesContainer,
}: {|
  variablePath: string,
  variablesContainer: gd.VariablesContainer,
|}): gdVariable | null => {
  const pathSegments = parseVariablePath(variablePath);

  if (pathSegments.length === 0) {
    throw new Error('Invalid variable path');
  }

  const firstSegment = pathSegments[0];
  if (firstSegment.type !== 'property') {
    throw new Error('Variable path must start with a property name');
  }

  if (!variablesContainer.has(firstSegment.value)) {
    return null;
  }
  let variable = variablesContainer.get(firstSegment.value);

  for (let i = 1; i < pathSegments.length; i++) {
    const segment = pathSegments[i];
    if (segment.type === 'property') {
      if (
        variable.getType() !== gd.Variable.Structure ||
        !variable.hasChild(segment.value)
      ) {
        return null;
      }
      variable = variable.getChild(segment.value);
    } else {
      const index = parseInt(segment.value, 10);
      if (
        variable.getType() !== gd.Variable.Array ||
        index >= variable.getChildrenCount()
      ) {
        return null;
      }
      variable = variable.getAtIndex(index);
    }
  }

  return variable;
};