Class: Moolah::Charge

Inherits:
Object
  • Object
show all
Defined in:
lib/moolah/charge.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(valid_attributes: [], **kwargs) ⇒ Charge

Returns a new instance of Charge.



3
4
5
6
7
8
9
10
11
 
# File 'lib/moolah/charge.rb', line 3

def initialize(valid_attributes: [], **kwargs)
  extend Anemic::Model
  validate_attributes!(kwargs, valid_attributes)
  kwargs.each do |component_name, component_value|
    attribute component_name, Money
  end

  self.attributes = kwargs
end

Class Method Details

.sum(charges) ⇒ Object 



34
35
36
37
38
 
# File 'lib/moolah/charge.rb', line 34

def self.sum(charges)
  charges_to_sum = charges.dup
  charge = charges_to_sum.shift
  charges_to_sum.inject(charge, &:+)
end

Instance Method Details

#+(other_charge) ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/moolah/charge.rb', line 13

def +(other_charge)
  return self unless other_charge
  all_component_keys = Set.new(attributes.keys + other_charge.attributes.keys)

  combined_components = all_component_keys.inject({}) do |com, key|
    com.tap do |c|
      values = [attributes[key], other_charge.attributes[key]].compact # will have at least one value
      first_value, second_value = *values # second value could be nil but adding a nil value to a money will work
      c[key] = first_value + second_value
    end
  end

  Charge.new(**combined_components)
end

#==(other_charge) ⇒ Object 



40
41
42
 
# File 'lib/moolah/charge.rb', line 40

def ==(other_charge)
  attributes == other_charge.attributes
end

#total ⇒ Object 



28
29
30
31
32
 
# File 'lib/moolah/charge.rb', line 28

def total
  totals = attributes.values.compact.map(&:total)
  first = totals.shift # use first value so we have the right currency, otherwise we'd need to set one on a zeroed money
  totals.inject(first, &:+) || Money.zero
end