Class: CurrencyCoinConverter::Base

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/currency_coin_converter/base.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Base

Returns a new instance of Base.



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# File 'lib/currency_coin_converter/base.rb', line 12

def initialize
  self.api_version = 'v6'
  @cache = {}
end

Instance Attribute Details

#api_key ⇒ Object

Returns the value of attribute api_key.



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# File 'lib/currency_coin_converter/base.rb', line 48

def api_key
  @api_key
end

#api_version ⇒ Object

Returns the value of attribute api_version.



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# File 'lib/currency_coin_converter/base.rb', line 49

def api_version
  @api_version
end

Class Method Details

.api_key ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 97

def api_key
  instance.api_key
end

.api_key=(api_key) ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 101

def api_key=(api_key)
  instance.api_key = api_key
end

.api_version ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 105

def api_version
  instance.api_version
end

.conversion_rate(from:, to:) ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 113

def conversion_rate(from:, to:)
  instance.conversion_rate(from: from, to: to)
end

.conversion_rates(base_currency) ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 117

def conversion_rates(base_currency)
  instance.conversion_rates(base_currency)
end

.convert(amount, from:, to:, round: 2) ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 109

def convert(amount, from:, to:, round: 2)
  instance.convert(amount, from: from, to: to, round: round)
end

Instance Method Details

#conversion_rate(from:, to:) ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 21

def conversion_rate(from:, to:)
  conversion_rates(from).fetch(to) do
    raise Error, "currency code is invalid: #{to}"
  end
end

#conversion_rates(base_currency) ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 27

def conversion_rates(base_currency)
  cached = @cache[base_currency]

  return cached[:rates] if cached && !cache_expired?(cached)

  begin
    rates = get(path: base_currency)['conversion_rates']

    @cache[base_currency] = {
      rates: rates,
      created_at: Process.clock_gettime(Process::CLOCK_MONOTONIC)
    }

    rates
  rescue Error
    return cached[:rates] if cached

    raise
  end
end

#convert(amount, from:, to:, round: 2) ⇒ Object 



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# File 'lib/currency_coin_converter/base.rb', line 17

def convert(amount, from:, to:, round: 2)
  (amount * conversion_rate(from: from, to: to)).round(round)
end