var compactable = require('../compactable');

function isComponentOf(property1, property2, shallow) {
  return (
    isDirectComponentOf(property1, property2) ||
    (!shallow &&
      !!compactable[property1.name].shorthandComponents &&
      isSubComponentOf(property1, property2))
  );
}

function isDirectComponentOf(property1, property2) {
  var descriptor = compactable[property1.name];

  return (
    'components' in descriptor &&
    descriptor.components.indexOf(property2.name) > -1
  );
}

function isSubComponentOf(property1, property2) {
  return property1.components.some(function (component) {
    return isDirectComponentOf(component, property2);
  });
}

module.exports = isComponentOf;