pkutaj / curcon

The DRY and SOLID Currency Converter

The DRY & SOLID Currency Converter

THIS LINE IS HEAR FOR THE SAKE OF THIS EXERCISE

purpose

The aim of this project is to:

• write a currency converter
• use Node.Js on the back end
• follow the DRY and SOLID principles of clean code
• have a command line UI with powershell
• separate the UI layer from the main program and support an easy addition / removal of various types of input mechanisms (console, input into sourcefile, csv files)
• data-validation for the front-end input, checking the currency keys against an array from the requested JSON
• have a web application UI / layer

• the idea of the code is to allow as many UIs as possible via the proper separation of the service and UI layer via the proper use of principles of OOP, DRY and SOLID

• this is a rough sketch

instructions

• download, navigate to ./ui > powershell and run curcon.bat
  • node is required to have on client
  • still windows-based, powershell front-end
• you need to have node installed
• currently, it's running on windows-based powershell, the idea would be to use powershell-core to have this cross-platform
• if for any reason you'd like to put the variable inside of the source code, navigate to sourceFileInput.js and see the commented section

demo for the PS UI

todo

• web server: Node
  • routing should be inspired by the syntax of time.is so you could run the queries directly in the address bar (for.ex/list/eur or foo.bar/convert/1000/eur/czk)
• web UI: maybe jQuery, but possibly no library or framework, plain stuff
• csv input type could be a possibility to point the script to the .csv file to iterate over and create an appended copy with the current conversion rate / result

sources

• Foreign exchange rates API
• inspiration by Agile Tour 2017 Sherbrooke - Keynote with Uncle Bob