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index.js
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index.js
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [START functions_firebase_reactive]
const Firestore = require('@google-cloud/firestore');
const firestore = new Firestore({
projectId: process.env.GOOGLE_CLOUD_PROJECT,
});
// Converts strings added to /messages/{pushId}/original to uppercase
exports.makeUpperCase = event => {
const resource = event.value.name;
const affectedDoc = firestore.doc(resource.split('/documents/')[1]);
const curValue = event.value.fields.original.stringValue;
const newValue = curValue.toUpperCase();
if (curValue !== newValue) {
console.log(`Replacing value: ${curValue} --> ${newValue}`);
return affectedDoc.set({
original: newValue,
});
} else {
// Value is already upper-case
// Don't perform a(nother) write to avoid infinite loops
console.log('Value is already upper-case.');
}
};
// [END functions_firebase_reactive]