Push Google Forms Submission to Hangouts Chat with Apps Script and Webhook

pushSubmissionToHangoutsChat.js

/**
 * This script will allow you to push form submission in a Hangouts Chat space by using Webhook
 *
 * How to setup ?
 * 1 - Create a Hangouts Chat space
 * 2 - Add people
 * 3 - Create Webhook : https://developers.google.com/hangouts/chat/how-tos/webhooks
 * 4 - Create a form and go to Apps Script editor
 * 5 - Copy paste code below
 * 6 - Replace Webhook url int the code for URL_WEBHOOK
 * 7 - Create a trigger for the function pushToHangoutsChat
 *
 */

function pushToHangoutsChat(e) {
  var URL_WEBHOOK = "URL you get in the Hangouts chat space";
  var form = e.source;
  var emailRespondent = e.response.getRespondentEmail();
  var title =form.getTitle();
  var formUrl = form.getSummaryUrl().replace("viewanalytics","edit#responses")
  var items = e.response.getItemResponses();
  var widgets = [];
  for(var i = 0; i< items.length; i++) {
    var item = items[i];
    widgets.push({"keyValue": {
      "topLabel": item.getItem().getTitle(),
      "content": item.getResponse(),
      "contentMultiline": true}
                 });
  }
  var card = buildCard(title,emailRespondent,widgets,formUrl);
  var options = {
    method : "post",
    contentType : "application/json; charset=UTF-8",
    payload : JSON.stringify(card)
  };
  UrlFetchApp.fetch(URL_WEBHOOK, options);
}

function buildCard(title,respondent,widgets,formUrl){
  return {
    "cards": [
      {
        "header": {
          "title": title,
          "subtitle": "par "+respondent,
          "imageUrl": "https://goo.gl/kv2ENA",
          "imageStyle": "IMAGE"
        },
        "sections": [
          {
            "widgets": widgets
          },
          {
            "widgets": [
              {
                "buttons": [
                  {
                    "textButton": {
                      "text": "Voir Formulaire",
                      "onClick": {
                        "openLink": {
                          "url": formUrl
                        }
                      }
                    }
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  }
}

@St3ph-fr et all
One thing that has been nice from my end is having an additional button (copying lines 58-67) that goes to the Google Sheet responses so we can see the full form response log. I am not sure how to get the sheet information through API, but have been able to just add the direct URL of the sheet.

@agrrajag
Thanks for the recomendations,
You have use the same code above and it's ok?
When I put the code into my script, change the webhooks for mine, that make me a "Erreur TypeError: Cannot read property 'getRespondentEmail' of undefined" :-/

it's not working for me, do you know why?

Thanks in advance