Terminal - Test task of KFD

Description

Check the original repository to find the task description.

Here I'll share some implementation details:

1. My programming language of choice is Kotlin.
2. I use Gradle.
3. Application provides simple interactive CLI to run terminal.
4. Initial exchange rates are calculated based on initial terminal balance.
5. Code can be extended to have multiple users. Check User.kt for details.
6. There are some quality of life enhancements such as detailed error messages.

Here is some real output from terminal:

PS C:\Users\admin\IdeaProjects\Terminal> java -jar .\build\libs\Terminal-1.0-SNAPSHOT-all.jar           
Welcome to terminal!
Enter an operation (or h for help): h
Available operations:
    h - help
    b - balance
    c - print currency list
    d - print exchange rates
    e - exit
    ex[amount]<from>-[amount]<to> - exchange
Example: ex1000USD-RUB; exRUB-250USD
Enter an operation (or h for help): b
Your balance:
    RUB - 1 000 000,0000000000
    USD - 0,0000000000
    EUR - 0,0000000000
    USDT - 0,0000000000
    BTC - 0,0000000000
Terminal balance:
    RUB - 10 000,0000000000
    USD - 1 000,0000000000
    EUR - 1 000,0000000000
    USDT - 1 000,0000000000
    BTC - 1,5000000000
Enter an operation (or h for help):

Build

In order to build runnable jar file we need to bundle all kotlin libraries and dependencies in one jar file.

Shadow plugin is used to do that.

./gradlew shadowJar

Usage

Now run jar file with java > 17.0.

java -jar ./build/libs/Terminal-1.0-SNAPSHOT-all.jar