Backend:

1. Create a new console app Function App 4 project in Visual Studio.
2. Implement a GET endpoint that takes in a year and month in the format yymm, e.g. /currency/2212.
3. Query a free currency exchange rate API for USD/NIS rates for the specified month using a static singleton http client class called ExchangeRateService.
4. Return a JSON object that includes a dictionary of rate per day of the month named GRAPH (in capital letters) and the minimum and maximum values for the month using LINQ.
5. Create a service class that contains all the logic for querying the currency exchange rate API and calculating the values.
6. Use class library DI to call the service class from the FunctionApp, and use an interface for the service.
7. Add a unit test to test the service.

Frontend:

1. Create a new Angular project with one input field for the month and one button that calls the backend endpoint using a service and displays the result.
2. Use SCSS to style the form to give it a reasonable look.
3. Separate the frontend and backend projects.
4. Make sure to write clear and concise code with comments and no dead code or empty lines.
5. Test the app to ensure that all requirements are met.
6. Record a video explaining the code and demonstrating the app in runtime.
7. Upload the solution to GitHub.

This is a Currency Exchange Rate app, which consists of a backend and frontend. The backend is a .NET Core console application that serves a GET endpoint that queries a free currency exchange rate API for USD/NIS rates for a specified month. The frontend is an Angular application that presents a form with an input field for the month and a button to call the backend endpoint and display the result.

.NET Core SDK
IDE or text editor

Clone this repository
Navigate to the backend/CurrencyExchangeRateApp directory in your terminal
Run dotnet run to build and run the backend application

Endpoint: /currency/{date}
Input: Month in YYMM format
Output: JSON object with:
    Dictionary of rate per day of month, named GRAPH (in capital letters)
    Min and Max values (using LINQ)

The backend queries a free currency exchange rate API for USD/NIS rates for the specified month
It uses a static singleton http client (class name: ExchangeRateService)

The backend project follows a typical .NET Core architecture with the following structure:

Func/Startup.cs: Configures the application services
Func/Currency.cs: Contains the GET endpoint that returns the exchange rate data
Func/ExchangeRateService.cs: Contains the logic for querying the currency exchange rate API and formatting the response

Unit Test

The ExchangeRateServiceTests.cs file contains a unit test to test the GetExchangeRatesAsync method in the ExchangeRateService class.

• Angular CLI

• Navigate to the frontend/currency-exchange-rate-app directory in your terminal
• Run npm install to install the dependencies
• Run ng serve to start the development server
• Open http://localhost:4200 in your browser to view the app

• The frontend presents a form with one input field for month and one button that calls the backend endpoint using a service and displays the result. The form has basic styling using SCSS.