Module: ActsAsPriceable::Base::ClassMethods

Defined in:
lib/acts_as_priceable/base.rb

Instance Method Summary collapse

Instance Method Details

#has_price(name = :price, options = {}) ⇒ Object



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# File 'lib/acts_as_priceable/base.rb', line 14

def has_price(name = :price, options = {})
  scale = options[:scale] || 2
  without_validations = options[:without_validations] || false
  serialized = options[:serialized]

  ActsAsPriceable::Schema::COLUMNS.each do |column_name, column_type|
    raise AttributeError, "#{name}_#{column_name} is not defined" if columns_hash["#{name}_#{column_name}"].nil?
    raise AttributeError, "#{name}_#{column_name} has wrong column type (is #{columns_hash["#{name}_#{column_name}"].type}) should be #{column_type}" if columns_hash["#{name}_#{column_name}"].type != column_type
  end if serialized.nil?

  gross = "#{name}_gross"
  net = "#{name}_net"
  tax_value = "#{name}_tax_value"
  tax = "#{name}_tax"
  mode = "#{name}_mode"

  send :define_method, "get_#{name}_attribute" do |attribute|
    if serialized.nil?
      self[attribute.to_sym].to_i
    else
      self.send(serialized)[attribute.to_s].to_i
    end
  end

  send :define_method, "set_#{name}_attribute" do |attribute, value|
    if serialized.nil?
      self[attribute.to_sym] = value
    else
      self.send(serialized)[attribute.to_s] = value
    end
  end

  send :define_method, gross do
    BigDecimal.new(self.send("get_#{name}_attribute", gross)) / BigDecimal.new(10**scale.to_i)
  end

  send :define_method, "#{gross}=" do |value|
    self.send "set_#{name}_attribute", gross, (value.to_s.gsub(',', '.').to_d * (10**scale)).to_i
  end

  send :define_method, net do
    BigDecimal.new(self.send("get_#{name}_attribute", net)) / BigDecimal.new(10**scale.to_i)
  end

  send :define_method, "#{net}=" do |value|
    self.send("set_#{name}_attribute", net, (value.to_s.gsub(',', '.').to_d * (10**scale)).to_i)
  end

  send :define_method, tax do
    self.send "get_#{name}_attribute", tax
  end

  send :define_method, "#{tax}=" do |value|
    self.send "set_#{name}_attribute", tax, value
  end

  send :define_method, tax_value do
    send(gross) - send(net)
  end

  send :attr_accessor, mode.to_sym
  send :attr_accessor, name

  send :define_method, "update_#{name}" do
    if self.send(mode).to_s == 'net'
      self.send "#{net}=", self.send(name)
      self.send "#{gross}=", self.send(net) * ((BigDecimal.new(self.send(tax)) / 100) + 1)
    else
      self.send "#{gross}=", self.send(name)
      self.send "#{net}=", self.send(gross) / ((BigDecimal.new(self.send(tax)) / 100) + 1)
    end
  end

  send :before_validation do
    if self.send(name) && self.send(mode)
      self.send "update_#{name}"
    end
  end

  unless without_validations
    send :validates, gross.to_sym, numericality: {greater_than_or_equal_to: 0}
    send :validates, net.to_sym, numericality: {greater_than_or_equal_to: 0}
    send :validates, tax.to_sym, numericality: {greater_than_or_equal_to: 0}
  end

end