[NEW] Google Forms Send Post Request On Submit

Code.gs

const FETCH_POST_URL = "http://requestbin.net/r/16zlov01";

function onSubmit(e) {
  let currentForm = FormApp.getActiveForm();
  let allFormResponses = currentForm.getResponses();
  let lastestResponse = allFormResponses[allFormResponses.length - 1];
  let formResponses = lastestResponse.getItemResponses();
  
  let _formId = lastestResponse.getId();
  let _formTitle = currentForm.getTitle();
  let _formIsQuiz = currentForm.isQuiz();
  let _formSubmitDate = lastestResponse.getTimestamp();
  
  let result = {
    id: _formId,
    title: _formTitle,
    quizInfo: {
      isQuiz: _formIsQuiz,
      results: {
        max: 0,
        current: 0
      }
    },
    results: [],
    submitDate: _formSubmitDate
  };
  
  
  for (var i = 0; i < formResponses.length; i++) {
    
    let response = formResponses[i];
    let responseItem = response.getItem();
    
    let _id = responseItem.getId();
    let _title = responseItem.getTitle();
    let _result = response.getResponse();
    let _helpText = responseItem.getHelpText();
    let _type = responseItem.getType();
    
    let _castedItem = _castFormItem(responseItem, _type);
    let _points = undefined;
    let _maxPoints = undefined;
    
    
    if (_castedItem && typeof _castedItem.getPoints == "function") {
      let gradableResponseItem = lastestResponse.getGradableResponseForItem(responseItem);
      
      _maxPoints = _castedItem.getPoints();
      _points = gradableResponseItem.getScore();
    }
    
    let r = {
      id: _id,
      title: _title,
      result: _result,
      score: {
        max: -1,
        current: -1
      },
      type: _type,
      helpText: _helpText || "No help text found."
    }
    
    if (typeof _maxPoints != "undefined") {
      result.quizInfo.results.max += _maxPoints;
      r.score.max = _maxPoints;
    }
    
    if (typeof _points != "undefined") {
      result.quizInfo.results.current += _maxPoints;
      r.score.current = _points;
    }
    
    result.results.push(r);

  };
  
  UrlFetchApp.fetch(FETCH_POST_URL, {
    method: "POST",
    contentType: "application/json",
    payload: JSON.stringify(result)
  });
  
  Logger.log("PAYLOAD_TEXT:");
  Logger.log(JSON.stringify(result, null, 2));
  
}

function _castFormItem(item, itemType) {
  if (itemType === FormApp.ItemType.CHECKBOX) {
    return item.asCheckboxItem();
  }
  if (itemType === FormApp.ItemType.DATE) {
    return item.asDateItem();
  }
  if (itemType === FormApp.ItemType.DATETIME) {
    return item.asDateTimeItem();
  }
  if (itemType === FormApp.ItemType.DURATION) {
    return item.asDurationItem();
  }
  if (itemType === FormApp.ItemType.LIST) {
    return item.asListItem();
  }
  if (itemType === FormApp.ItemType.MULTIPLE_CHOICE) {
    return item.asMultipleChoiceItem();
  }
  if (itemType === FormApp.ItemType.PARAGRAPH_TEXT) {
    return item.asParagraphTextItem();
  }
  if (itemType === FormApp.ItemType.SCALE) {
    return item.asScaleItem();
  }
  if (itemType === FormApp.ItemType.TEXT) {
    return item.asTextItem();
  }
  if (itemType === FormApp.ItemType.TIME) {
    return item.asTimeItem();
  }
  if (itemType === FormApp.ItemType.GRID) {
    return item.asGridItem();
  }
  if (itemType === FormApp.ItemType.CHECKBOX_GRID) {
    return item.asCheckboxGridItem();
  }
  if (itemType === FormApp.ItemType.PAGE_BREAK) {
    return item.asPageBreakItem();
  }
  if (itemType === FormApp.ItemType.SECTION_HEADER) {
    return item.asSectionHeaderItem();
  }
  if (itemType === FormApp.ItemType.VIDEO) {
    return item.asVideoItem();
  }
  if (itemType === FormApp.ItemType.IMAGE) {
    return item.asImageItem();
  }
  return null;
}