After you sign in, you get an OTP token generated using Firebase Phone Auth. After you login, the application starts a background service that constantly publishes and receives the Firestore Database UIDs, by using the Nearby Messages API from Google. When two devices are in close proximity (approximately 4-5m for Bluetooth + Sonar), their meetup is registered in Firestore. From the picker in the logged in screen, you can choose your current health status and press the button. This updates your health status in the database. Using Firestore Cloud Messages, there is a JavaScript function that triggers when this update happens and sends a push notification to the users that you have interacted with.
- https://firebase.google.com/docs/firestore/quickstart
- https://firebase.google.com/docs/functions/get-started
- https://developers.google.com/nearby/messages/overview
- https://cloud.google.com/maps-platform/
In order to use Backend Services, You have to create API KEY from Google Cloud console and enable Maps SDK for Android and Nearby Message API.
Follow the installation guide for Firestore
https://firebase.google.com/docs/firestore/quickstart
Set up Firebase Functions
https://firebase.google.com/docs/functions/get-started
After creating the firebase project you have to create Realtime Database Schemas
2 tabels:
-
users
"users": { "user_id1" : { "phone" : } "user_id2" : { "phone" : } } -
users meetings
"users_meetings" : { "user_id1" : { "meetings" : { "user_id_met1" : { "found_timestamp" : ... "lost_timestamp" : ... "status" : ... } "user_id_met2" : { "found_timestamp" : ... "lost_timestamp" : ... "status" : ... } } } "user_id2" : { "meetings" : { "user_id_met1" : { "found_timestamp" : ... "lost_timestamp" : ... "status" : ... } "user_id_met2" : { "found_timestamp" : ... "lost_timestamp" : ... "status" : ... } } } }
Once you complete the Firebase Functions setup, do the following steps:
- Goto this repository and look for firestore directory.
- Execute the following command
cd firestore/functions
npm install
- Then navigate back to previous directory by
cd ../ - Then run
firebase deploy --only functionscommand to deploy push notification in cloud.
Make sure you have installed Firebase CLI reference
If not installed then Follow the instructions guide for
https://firebase.google.com/docs/cli
Also You have to download your google-services.json file and move it into the project folder.
The Sample APK file is located here
If any problem occur in this project, feel free to contact me : aniket.wali007@gmail.com