Post the results of a Google Form to a Slack channel webhook

PostToSlack.js

var webhook = 'https://hooks.slack.com/services/***';
var header = 'A user requested an integration be reviewed.';
var whoLeader = 'Review requested by:';

function OnSubmit(e) {
  var responses = e.response.getItemResponses();
  
  UrlFetchApp.fetch(webhook, {
    method: 'post',
    payload: JSON.stringify({
      'blocks': [{
        'type': 'header',
        'text': {
          'type': 'plain_text',
          'text': header
        }
      }, {
        'type': 'section',
        'fields': [{
          'type': 'plain_text',
          'text': whoLeader
        }, {
          'type': 'plain_text',
          'text': e.response.getRespondentEmail()
        }]
      }].concat(makeBlocks(responses))
    })
  });
}

var makeBlocks = function(responses) {
  var fields = [];
  
  for (var i = 0; i < responses.length; i++) {
    var response = responses[i];
    var question = response.getItem().getTitle();
    // For most response types, this gives you a nice simple string.
    // 3 types give more complicated objects, which we do not yet handle:
    // - CheckboxItem
    // - GridItem
    // - CheckboxGridItem
    var answer = response.getResponse();
    
    fields.push({
      'type': 'section',
      'fields': [{
        'type': 'plain_text',
        'text': question
      }, {
        'type': 'plain_text',
        'text': answer
      }]
    });
  }

  return fields;
}