Export Form responses as csv Google Apps Scripts - google-apps-script

Question

Is there is a fast way to programmatically export all responses from a Google Form to a csv? Something like "Export responses to csv" invoked via Scripts.
Right now I'm doing it in a rock art way:
Iterate over the forms I want to export (~75)
Open each form var form = FormApp.openById(formId);
Get responses: var formReponses = form.getResponses(); (from 0 to 700 responses each form)
Iterate over responses and get item responses: var preguntes = formReponses[r].getItemResponses();
For each itemResponse, convert it to csv/json
Export responses to a drive file
This is extremly slow and additionally it hangs over and over, so I had to export responses in chunks of 50 responses and save them in Drive separated files. On next execution (after letting servers to cool down for a while), I'm executing the script again, skipping the number of responses found on the chunk file.
Additionally I'm not sure that Google keeps the responses order when doing form.getResponses(); (actually I've found that if the form has been modified, the order is not the same)
Is there a better way to do it?

Answer 1

Whith the help of #JackBrown I've managed to write a Chrome extension to download responses (maybe soon in github). This will wait for each download in the formIds object until finished and then prompt for the next one:
'use strict';
function startDownload() {
const formIds = {
'Downloads-subfolder-here': {
'Download-filename-here': '1-cx-aSAMrTK0IHsQkE... {form-id here}',
'Another-filename-here': '...-dnqdpnEso {form-id here}',
// ...
},
'Another-subfolder-here': {
'Download-filename-here': '1-cx-aSAMrTK0IHsQkE... {form-id here}',
'Another-filename-here': '...-dnqdpnEso {form-id here}',
// ...
},
};
const destFolders = Object.keys(formIds);
const downloads = [];
for (let t = 0, tl = destFolders.length; t < tl; t += 1) {
const destFolder = destFolders[t];
const forms = Object.keys(formIds[destFolder]);
for (let f = 0, fl = forms.length; f < fl; f += 1) {
const formName = forms[f];
downloads.push({
destFolder,
formName,
url: `https://docs.google.com/forms/d/${formIds[destFolder][formName]}/downloadresponses?tz_offset=-18000000`,
filename: `myfolder/${destFolder}/${formName.replace(/\//g, '_')}.csv`,
});
}
}
const event = new Event('finishedDownload');
const eventInterrupt = new Event('interruptedDownload');
let currId;
chrome.downloads.onChanged.addListener((downloadDelta) => {
if (downloadDelta.id === currId) {
if (downloadDelta.state && downloadDelta.state.current === 'complete') {
document.dispatchEvent(event);
} else if (downloadDelta.state && downloadDelta.state.current === 'interrupted') {
console.log(downloadDelta);
document.dispatchEvent(eventInterrupt);
}
}
});
downloads.reduce((promise, actual) => {
return promise.then((last) => (last ? new Promise((resolve) => {
const { url, filename, destFolder, formName } = actual;
function listener() {
document.removeEventListener('finishedDownload', listener);
document.removeEventListener('interruptedDownload', listener);
resolve(true);
};
function interrupt() {
document.removeEventListener('finishedDownload', listener);
document.removeEventListener('interruptedDownload', listener);
resolve(false);
}
console.log(`Processant ${destFolder}, ${formName}: ${url}`);
document.addEventListener('finishedDownload', listener);
document.addEventListener('interruptedDownload', interrupt);
chrome.downloads.download({ url, filename }, (downloadId) => {
currId = downloadId;
if (!downloadId) {
console.log();
console.log('Error downloading...');
console.log(runtime.lastError);
resolve();
}
});
}) : Promise.resolve(false)));
}, Promise.resolve(true));
}
chrome.browserAction.onClicked.addListener((/*tab*/) => startDownload());