instacart.rb

# Create List of items (STORE)
# => Hash key: name of item, value: price of item (integer)
# Welcome user
# Show user list of of items
# LOOP (more choices)
  #--- LOOP
  # Ask user to pick item
  # Get user choice
  # validate that choice exists
  #--- END LOOP
# Add item to cart (CART) => Hash similar to Store
# Ask user if they wish to continue
# END LOOP
# Display total amount
require "pry-byebug"

STORE = {
  "kiwi" => 1.25,
  "banana" => 0.5,
  "mango" => 4,
  "asparagus" => 9
}

CART = {}

def show_items
  STORE.each do |item, value|
    puts "#{item}: #{value}€"
  end
end

def checkout
  puts "-------BILL---------"
  CART.each do |item, hash|
    puts "#{item}: #{hash[:price]}€ x #{hash[:quantity]}"
  end
  puts "TOTAL: #{total}€"
end

def total
  # sum = 0
  # CART.each do |item, value|
  #   sum += value
  # end
  # sum
  CART.values.reduce(0) do |acc, hash|
    acc += hash[:price] * hash[:quantity]
  end
end

def add_item_to_cart(item)
  if CART.key?(item)
    CART[item][:quantity] += 1
  else
    CART[item] = {
      price: STORE[item],
      quantity: 1
    }
  end
end

puts "Welcome to Instacart:"
puts "_____________________"

show_items

loop do
  puts "Please pick an item:"
  choice = gets.chomp
  until STORE.key?(choice)
    puts "Item doesn't exist."
    puts "Pleace pick an item:"
    choice = gets.chomp
  end
  add_item_to_cart(choice)
  puts "Do you want to add another item? (quit to checkout):"
  choice = gets.chomp
  break if choice == "quit"
end
checkout