Repository Details / Requirements:

Create a mobile app and a containerized application with two services (backend, database) as follows:

The solution should start after cloning the repo and giving the docker-compose up command. The mobile app should be able to fetch data from the backend. Stopping the backend solution with Ctrl+C or docker-compose down should gracefully stop the services, and the mobile app should display that the backend is not available anymore. Provide instructions on how to run the mobile app.

Backend Service:

• Is developed using Node.js, express and sequelize.
• Contains 5 endpoints that could be tested using Swagger or a REST client (.rest file)

• Get the list of books - gets the books from the database
• Get one book by id - gets one book with the matching id from the db
• Update one book by id - updates the title of the book by the given id
• Create a new book - inserts a new book into the db
• Delete a book by id - removes the book from the db

• Swagger endpoint: http://localhost:13000/docs

Database:

• Database used is Postgres
• The database has one table listing books. The books have two columns/properties: an id and a title. When starting the solution, the database already have a few entries (seed.js).

How to run backend service

• You need a docker installed
• After cloning the project, go to backend folder and run:
• • docker compose up -d

Mobile App (Android)

• Using Jetpack Compose
• Create an emulator or connect a device using the same computer network
• Open the mobile/app folder in Android Studio and click to run the project
• Or use a command line to build and install app:
• • gradlew installDebug
• • adb install path/to/your_app.apk
• Note: use ifconfig or ipconfig to get the correct ip address of your computer and update it in the app/src/main/java/com/example/books/data/RetrofitClient.kt file

Retrofit.Builder()
    .baseUrl("http://192.168.1.78:13000/")

Screenshots Backend

Screenshots Mobile / Android

TODOs

• Backend
• • Migrate backend node.js to Typescrypt
• • Add JWT Authentication
• Mobile
• • Use strings to internationalize messages
• • Save search books in a local database (datastore, shared preferences)
• • Migrating Retrofit to Ktor to use KMM and test iOS version

Migrating nodejs to typescript

• npm install -D typescript @types/node @types/express
• npx tsc -v (check if installed)
• npm install -D typescript @tsconfig/node22
• npm install --save-dev ts-node typescript