gps_2.2_electronic_grocery_list_teacher.rb

# https://github.com/4rlm/phase-0-tracks/blob/master/ruby/gps2_2.rb


def list_creator(items)
    grocery_list = {}
    puts "\n----------------------\n"
    puts "Add items to your grocery list:"
    puts "Ex format: 'carrots apples cereal pizza"
    puts "\n----------------------\n"
    items = gets.chomp
    items_array = items.split(' ')
    items_array.each do |item|
        grocery_list.store(item, 0)
    end

    grocery_list
    list_printer(grocery_list)
end

def item_adder(grocery_list, items)
    items_array = items.split(' ')
    items_array.each do |item|
        grocery_list.store(item, 0)
    end

    grocery_list
end


def item_remover(grocery_list, items)
    # puts "Enter item to remove:"
    # puts "Ex format: 'carrots apples cereal pizza"
    items = gets.chomp
    items_array = items.split(' ')

    items_array.each do |item|
        grocery_list.delete(item)
        puts "Removed #{item}."
    end

    grocery_list
    list_printer(grocery_list)
end

def quantity_updater(grocery_list, key)
    # puts "\n----------------------\n"
    # puts "What would you like to update?"
    # key = gets.chomp

    # puts "\n----------------------\n"
    puts "You have '#{key}: #{grocery_list[key]}' on your list."
    puts "Enter new quantity for #{key}:"
    value = gets.chomp

    grocery_list[key] = value

    puts "Item(s) count updated."
    # list_printer(grocery_list)
    grocery_list
    list_printer(grocery_list)
end


def list_printer(grocery_list)
    puts "\n----------------------\n"
    puts "Here's a list of your items:"
    grocery_list.each{|key,value|
        puts "#{key}: #{value}"
    }
end

def option_list(choice)
    option_list = [
        "\n----------------------\n",
        "You may update your list by entering:",
        "'add' to add an item.",
        "'remove' to remove an item.",
        "'change' to change the quantity.",
        "'done' if list is complete.",
        "\n----------------------\n"]

    options = option_list.each{|option| option}
    puts options

    response = gets.chomp

    if response == 'add'
        item_adder(grocery_list)
    elsif response == 'remove'
        item_remover(grocery_list)
    elsif response == 'change'
        quantity_updater(grocery_list)
    elsif response == 'done'
        puts "Have a nice day!"
        exit
    else
        puts "You entered an invalid selection."
        puts options
    end

end




# Calls list_creator
new_list = list_creator(items)


# Calls item_adder
puts "Add more items."
items = gets.chomp
item_adder(new_list, items)
puts "New item(s) added."

# Calls list_printer
# items = gets.chomp
list_printer(grocery_list)

# Calls option_list
# choice = gets.chomp
# option_list(choice)

# Calls item_remover
puts "Enter item to remove:"
puts "Ex format: 'carrots apples cereal pizza"
items = gets.chomp
item_remover(grocery_list, items)


# Calls quantity_updater
puts "What would you like to update?"
key = gets.chomp
quantity_updater(grocery_list, key)



############

def run_grocery_program
  puts "\n----------------------\n"
  puts "Add items to your grocery list:"
  puts "Ex format: 'carrots apples cereal pizza"
  puts "\n----------------------\n"
  items = gets.chomp

  new_list = list_creator(items)

  puts "Add more items."
  items = gets.chomp
  item_adder(new_list, items)

  items = gets.chomp
  puts "New item(s) added."
  list_printer(grocery_list)
end

run_grocery_program # outer program to interface with the user

#############