Class: SpotRate

Inherits:
Object
  • Object
show all
Defined in:
lib/spot-rate.rb,
lib/spot_rate/version.rb,
lib/spot_rate/google_currency_converter.rb

Defined Under Namespace

Classes: CurrencyNotFound, GoogleCurrencyConverter

Constant Summary collapse

VERSION = 
"0.5.0"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config = {}) ⇒ SpotRate

Returns a new instance of SpotRate.



24
25
26
27
 
# File 'lib/spot-rate.rb', line 24

def initialize(config = {})
  @from_currency = config[:from_currency]
  @to_currency   = config[:to_currency]
end

Instance Attribute Details

#from_currency ⇒ Object

Returns the value of attribute from_currency.



6
7
8
 
# File 'lib/spot-rate.rb', line 6

def from_currency
  @from_currency
end

#to_currency ⇒ Object

Returns the value of attribute to_currency.



6
7
8
 
# File 'lib/spot-rate.rb', line 6

def to_currency
  @to_currency
end

Class Method Details

.[](hash) ⇒ Object

Raises:

  • (ArgumentError) 


16
17
18
19
20
21
22
 
# File 'lib/spot-rate.rb', line 16

def self.[](hash)
  raise ArgumentError unless hash.size <= 2

  new(from_currency: hash.keys.first, to_currency: hash.values.first)
    .use(hash[:use] || hash[:using] || :default)
    .spot_rate
end

.available_converters ⇒ Object 



8
9
10
 
# File 'lib/spot-rate.rb', line 8

def self.available_converters
  @@available_converters ||= {}
end

.register_currency_converter(converter_key, converter_class) ⇒ Object 



12
13
14
 
# File 'lib/spot-rate.rb', line 12

def self.register_currency_converter converter_key, converter_class
  self.available_converters[converter_key.to_sym] = converter_class
end

Instance Method Details

#default_currency_converter ⇒ Object 



39
40
41
 
# File 'lib/spot-rate.rb', line 39

def default_currency_converter
  use(:default)
end

#spot_rate ⇒ Object 



35
36
37
 
# File 'lib/spot-rate.rb', line 35

def spot_rate
  default_currency_converter.spot_rate
end

#use(requested_converter_key) ⇒ Object 



29
30
31
32
33
 
# File 'lib/spot-rate.rb', line 29

def use(requested_converter_key)
  self.class
      .available_converters[requested_converter_key.to_sym]
      .new(@from_currency, @to_currency)
end