I have the following callable function that gets some data from my database, then creates a PDF with that data using html-pdf, uploads that PDF to storage and finally returns the name of the file in storage.
It works well in https form, but I want to convert it to a callable function, and for some reason I can't figure out, it crashes with this error: RangeError: maximum call stack size exceeded.
I suspect it has something to do with the fact that html-pdf doesn't work with promises and instead uses an error/data callback. But I've tried to convert it into a promise without success.
export const createPdf = functions.https.onCall((data, context) => {
const refId = data.refId;
const companyId = data.companyId;
const userId = context.auth.uid;
return admin.database().ref('/references').child(companyId).child(refId).once('value', (snapshot) => {
const filePath = '/references/' + refId + '/pdfs/' + refId + '.pdf';
const localeId = snapshot.child('locale').val();
return admin.database().ref('/tags').child(localeId).once('value', (tagsSnapshot) => {
const jsLocaleId = localeId.replace(/_/, "-");
const projectDate = moment().locale(jsLocaleId)
.year(snapshot.child('year').val())
.month(snapshot.child('month').val() - 1)
.date(15)
.format('MMMM YYYY');
const tags = tagsSnapshot.val();
const projectCategories = ...
const pictures = snapshot.child('pictures').val();
const pdfData = {
projectName: snapshot.child('projectName').val(),
surface: snapshot.child('surface').val(),
companyName: snapshot.child('companyName').val(),
date: projectDate,
newBuilding: snapshot.child('newBuilding').val(),
customerName: snapshot.child('customerName').val(),
categories: projectCategories,
address: snapshot.child('address').val().replace(/
/g, '<br>'),
satellite: snapshot.child('satellite').val(),
pictures: !isNullOrUndefined(pictures) ? pictures.map((item) => {
return {url: item}
}) : []
};
console.log("data", pdfData);
const options = {...};
const localTemplate = path.join(os.tmpdir(), 'share.html');
const localPDFFile = path.join(os.tmpdir(), 'share.pdf');
const languageCode = localeId.split("_")[0];
return admin.storage().bucket().file('/templates/share-' + languageCode + '.html').download({destination: localTemplate}).then(() => {
const source = fs.readFileSync(localTemplate, 'utf8');
const html = handlebars.compile(source)(pdfData);
pdf.create(html, options).toFile(localPDFFile, function (err, result) {
if (err) {
console.log(err);
throw new functions.https.HttpsError('internal', err.message);
}
return admin.storage().bucket().upload(localPDFFile, {
destination: filePath,
resumable: false,
metadata: {contentType: 'application/pdf'}
}).then((files) => {
console.log("files", files);
return files[0].getMetadata().then((metadata) => {
const name = metadata[0]["name"];
return {
name: name
};
});
}).catch(error => {
console.error(error);
throw new functions.https.HttpsError('internal', "Could not upload PDF because " + error.message);
});
});
}).catch((error) => {
console.error("Could not download template");
throw new functions.https.HttpsError('internal', error.message);
});
});
});
});
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