Market

Instructions

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Iteration 1 - Vendors

The Market will need to keep track of its Vendors. Each Vendor will be able to report its total inventory, stock items, and return the quantity of items. Any item not in stock should return 0 by default. Items will be represented as a String.

Use TDD to create a Vendor class that responds to the following interaction pattern:

pry(main)> require './lib/vendor'
#=> true

pry(main)> vendor = Vendor.new("Rocky Mountain Fresh")
#=> #<Vendor:0x00007f85683152f0...>

pry(main)> vendor.name
#=> "Rocky Mountain Fresh"

pry(main)> vendor.inventory
#=> {}

pry(main)> vendor.check_stock("Peaches")
#=> 0

pry(main)> vendor.stock("Peaches", 30)

pry(main)> vendor.check_stock("Peaches")
#=> 30

pry(main)> vendor.stock("Peaches", 25)

pry(main)> vendor.check_stock("Peaches")
#=> 55

pry(main)> vendor.stock("Tomatoes", 12)

pry(main)> vendor.inventory
#=> {"Peaches"=>55, "Tomatoes"=>12}

Iteration 2 - Market and Vendors

A Market is responsible for keeping track of Vendors. It should have a method called vendor_names that returns an array of all the Vendor's names.

Additionally, the Market should have a method called vendors_that_sell that takes an argument of an item represented as a String. It will return a list of Vendors that have that item in stock.

Use TDD to create a Market class that responds to the following interaction pattern:

pry(main)> require './lib/vendor'
#=> true

pry(main)> require './lib/market'
#=> true

pry(main)> market = Market.new("South Pearl Street Farmers Market")    
#=> #<Market:0x00007fe134933e20...>

pry(main)> market.name
#=> "South Pearl Street Farmers Market"

pry(main)> market.vendors
#=> []

pry(main)> vendor_1 = Vendor.new("Rocky Mountain Fresh")
#=> #<Vendor:0x00007fe1348a1160...>

pry(main)> vendor_1.stock("Peaches", 35)    

pry(main)> vendor_1.stock("Tomatoes", 7)    

pry(main)> vendor_2 = Vendor.new("Ba-Nom-a-Nom")    
#=> #<Vendor:0x00007fe1349bed40...>

pry(main)> vendor_2.stock("Banana Nice Cream", 50)    

pry(main)> vendor_2.stock("Peach-Raspberry Nice Cream", 25)    

pry(main)> vendor_3 = Vendor.new("Palisade Peach Shack")    
#=> #<Vendor:0x00007fe134910650...>

pry(main)> vendor_3.stock("Peaches", 65)    

pry(main)> market.add_vendor(vendor_1)    

pry(main)> market.add_vendor(vendor_2)    

pry(main)> market.add_vendor(vendor_3)    

pry(main)> market.vendors
#=> [#<Vendor:0x00007fe1348a1160...>, #<Vendor:0x00007fe1349bed40...>, #<Vendor:0x00007fe134910650...>]

pry(main)> market.vendor_names
#=> ["Rocky Mountain Fresh", "Ba-Nom-a-Nom", "Palisade Peach Shack"]

pry(main)> market.vendors_that_sell("Peaches")
#=> [#<Vendor:0x00007fe1348a1160...>, #<Vendor:0x00007fe134910650...>]

pry(main)> market.vendors_that_sell("Banana Nice Cream")
#=> [#<Vendor:0x00007fe1349bed40...>]

Iteration 3 - Items sold at the Market

Add a method to your Market class called sorted_item_list that returns a list of all items the Vendors have in stock, sorted alphabetically. This list should not include any duplicate items. For instance, if two vendors sell "Peaches", the sorted_item_list should only list "Peaches" once.

Additionally, your Market class should have a method called total_inventory that reports the quantities of all items sold at the market. Specifically, it should return a hash with items as keys and quantities as values. If multiple Vendors sell the same item, the quantity listed should be the sum of all the quantities. For instance if one Vendor has 35 "Peaches" in stock and another has 65 "Peaches" in stock, total_inventory should list the key of "Peaches" with the value 100.

Use TDD to update your Market class so that it responds to the following interaction pattern:

pry(main)> require './lib/vendor'
#=> true

pry(main)> require './lib/market'
#=> true

pry(main)> market = Market.new("South Pearl Street Farmers Market")    
#=> #<Market:0x00007fe134933e20...>

pry(main)> vendor_1 = Vendor.new("Rocky Mountain Fresh")
#=> #<Vendor:0x00007fe1348a1160...>

pry(main)> vendor_1.stock("Peaches", 35)    

pry(main)> vendor_1.stock("Tomatoes", 7)    

pry(main)> vendor_2 = Vendor.new("Ba-Nom-a-Nom")    
#=> #<Vendor:0x00007fe1349bed40...>

pry(main)> vendor_2.stock("Banana Nice Cream", 50)    

pry(main)> vendor_2.stock("Peach-Raspberry Nice Cream", 25)    

pry(main)> vendor_3 = Vendor.new("Palisade Peach Shack")    
#=> #<Vendor:0x00007fe134910650...>

pry(main)> vendor_3.stock("Peaches", 65)    

pry(main)> market.add_vendor(vendor_1)    

pry(main)> market.add_vendor(vendor_2)    

pry(main)> market.add_vendor(vendor_3)    

pry(main)> market.sorted_item_list
#=> ["Banana Nice Cream", "Peach-Raspberry Nice Cream", "Peaches", "Tomatoes"]

pry(main)> market.total_inventory
#=> {"Peaches"=>100, "Tomatoes"=>7, "Banana Nice Cream"=>50, "Peach-Raspberry Nice Cream"=>25}

Iteration 4 - Selling Items

Add a method to your Market class called sell that takes an item and a quantity as arguments. There are two possible outcomes of the sell method:

If the Market does not have enough of the item in stock to satisfy the given quantity, this method should return false.
If the Market's has enough of the item in stock to satisfy the given quantity, this method should return true. Additionally, this method should reduce the stock of the Vendors. It should look through the Vendors in the order they were added and sell the item from the first Vendor with that item in stock. If that Vendor does not have enough stock to satisfy the given quantity, the Vendor's entire stock of that item will be depleted, and the remaining quantity will be sold from the next vendor with that item in stock. It will follow this pattern until the entire quantity requested has been sold.

For example, suppose vendor_1 has 35 "Peaches" and vendor_3 has 65 "Peaches", and vendor_1 was added to the market first. If the method sell("Peaches", 40) is called, the method should return true, vendor_1's new stock of "Peaches" should be 0, and vendor_3's new stock of "Peaches" should be 60.

Use TDD to update the Market class so that it responds to the following interaction pattern: