cashier.rb

#By Van and Collin
require './register.rb'
require 'pry'
 
cashier = Register.new
 
cashier.load_products("products.csv")
while cashier.get_selection != 'done'
  if cashier.menu_selection == '1'
    while cashier.get_item != 'done' do
    cashier.get_item_qty
    cashier.calculate_subtotal
    cashier.add_to_invoice
    end
    cashier.get_amount_tendered
    cashier.calculate_change
    cashier.get_date_time
    cashier.add_to_csv
  end
 
  if cashier.menu_selection == '2'
    cashier.load_invoices('invoices.csv')
    while cashier.get_report_date != 'done'
      if cashier.transactions[cashier.report_date].nil?
      else
        cashier.get_daily_sales(cashier.report_date)
        cashier.get_daily_purchase(cashier.report_date)
        cashier.get_net_profit
        cashier.display_profits
        cashier.display_item_list(cashier.report_date)
      end
    end
  end  
end

register.rb

require 'csv'
require 'pry'
require 'date'
 
class Register
	attr_reader :products, :item, :invoice, :transactions, :gross_sales, :purchase_amount, :menu_selection, :report_date
	def initialize
		@products = {}
		@invoice = {}
		@transactions = {}
		@subtotal = 0
	end
 
	def load_products(file)
		CSV.foreach(file, headers: true) do |line| 
  			@products[line["SKU"]] = {name: line["Name"], Retail_Price: line["Retail_Price"], Purchasing_Price: line["Purchasing_Price"]}
		end
	end
 
	def get_selection
		puts "Please make a selection"
		puts "Enter 1 to start a new transaction!"
		puts "Enter 2 to retrieve a daily report!"
		puts "Enter done when finished"
		puts 'Make Your Selection!'
		@menu_selection = gets.chomp
	end
 
	def get_item_qty
		puts 'Enter how many!'
		@qty = gets.chomp
	end	
 
	def get_item
		puts 'Enter an Item! Type done when finished'
		@item = gets.chomp
	end
 
	def calculate_subtotal
		@subtotal += (@products[@item][:Retail_Price].to_f * @qty.to_f)
		puts "Subtotal : #{@subtotal}"
	end
 
	def add_to_invoice
		@invoice[@item] = {} if @invoice[@item].nil?
		@invoice[@item][:type] = @products[@item][:name]
		@invoice[@item][:qty] = 0 if @invoice[@item][:qty].nil?
		@invoice[@item][:qty] += @qty.to_i
	end
 
	def display_invoice
		puts @invoice
	end
 
	def get_date_time
		@date = Time.new
		@date = "#{@date.year}#{@date.month}#{@date.day}"
		@time = Time.new
		@time = "#{@time.hour}#{@time.min}#{@time.sec}"
 
	end
 
	def add_to_csv
		CSV.open("invoices.csv", "a+") do |csv|
			csv << ["Date", "Time", "SKU", "Name", "Price", "Qty"] if csv.count < 1
			@invoice.each do |key,value|
				csv << [@date, @time, key, @invoice[key][:type], @products[key][:Retail_Price], @invoice[key][:qty]]
			end
  		end
  		@invoice = {}
	end
 
	def load_invoices(file)
		CSV.foreach(file, headers: true) do |line|
			date = line["Date"]
			if @transactions[date].nil?
				@transactions[date] = {}
			end
			time = line["Time"]
			if @transactions[date][time].nil?
				@transactions[date][time] = []
			end
			@transactions[date][time] << [line["SKU"], line["Name"], line["Price"], line["Qty"]]
		end
	end
 
	def get_daily_sales(date)
		@gross_sales = 0
		@transactions[date].each do |key,value|
			value.each do |index|
				@gross_sales += (index[2].to_f*index[3].to_f)
			end
		end
	end
 
	def get_daily_purchase(date)
		@purchase_amount = 0
		@transactions[date].each do |key,value|
			value.each do |index|
				@purchase_amount += index[3].to_f * @products[index[0]][:Purchasing_Price].to_f
			end
		end
	end
 
	def get_net_profit
		@net_profit = @gross_sales - @purchase_amount
	end
 
	def display_profits
		puts "The total sales was : #{format_decimals(@gross_sales)} and the Net Profit was : #{format_decimals(@net_profit)}"
	end
 
	def display_item_list(date)
		@transactions[date].each_with_index do |(key,value),index|
			puts "Order #{index + 1} completed on #{date} at #{key}"
			value.each do |type|
				puts "#{type[3]} #{type[1]} Coffee for #{format_decimals(type[2].to_f * type[3].to_f)}"
			end
		end
	end	
 
	def get_amount_tendered
  	puts 'Enter tendered amount'
  	@tendered_amount = gets.chomp
	end
 
	def calculate_change
    puts "Change due: $#{format_decimals(@tendered_amount.to_f - @subtotal.to_f)}"
 	end
 
 	def format_decimals(input)
    sprintf("%.02f", input)
 	end
 
 	def get_report_date
 		puts 'Please enter a date to search, or enter done when finished'
 		@report_date = gets.chomp
 		puts 'Please enter a valid date' if @transactions[@report_date].nil?
 		return @report_date
 	end
end