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Contents
# frozen_string_literal: true
require 'spree/preferences/persistable'
module Spree
class Calculator < Spree::Base
include Spree::Preferences::Persistable
belongs_to :calculable, polymorphic: true, optional: true
# This method calls a compute_<computable> method. must be overriden in concrete calculator.
#
# It should return amount computed based on #calculable and the computable parameter
def compute(computable)
# Spree::LineItem -> :compute_line_item
computable_name = computable.class.name.demodulize.underscore
method_name = "compute_#{computable_name}".to_sym
calculator_class = self.class
if respond_to?(method_name)
send(method_name, computable)
else
raise NotImplementedError, "Please implement '#{method_name}(#{computable_name})' in your calculator: #{calculator_class.name}"
end
end
# A description for this calculator in few words
# @return [String] A description for the calculator
def self.description
model_name.human
end
###################################################################
def to_s
self.class.name.titleize.gsub("Calculator\/", "")
end
def description
self.class.description
end
def available?(_object)
true
end
end
end
Version data entries
66 entries across 66 versions & 1 rubygems