Class: Matheus::ConvertCurrency

Inherits:
Command
  • Object
show all
Includes:
ActiveSupport::NumberHelper
Defined in:
lib/matheus/convert_currency.rb

Overview

Usage:

$ convert-currency 100 usd eur
$ convert-currency 100 usd eur 2024-03-06
$ convert-currency usd eur  # defaults to 1

Instance Method Summary collapse

Methods inherited from Command

call

Methods included from StringFormat

#bold, #error, #red

Methods included from Result::Methods

#Failure, #Success

Instance Method Details

#call(args) ⇒ Object 



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# File 'lib/matheus/convert_currency.rb', line 13

def call(args)
  amount, source, target, date = parse_args(args)

  api_url = "https://cdn.jsdelivr.net/npm/@fawazahmed0/currency-api@#{date}/v1/currencies/#{source}.min.json"
  data = JSON.parse(Net::HTTP.get(URI(api_url)))
  rate = data.dig(source.downcase, target.downcase)

  if rate
    converted = amount * rate
    puts "#{number_to_currency(amount, unit: "")} #{source.upcase} = #{number_to_currency(converted, unit: "")} #{target.upcase}"
  else
    Failure("Conversion rate from #{source.upcase} to #{target.upcase} not found")
  end
rescue => e
  Failure(e.message)
end