1. vaheülesande lahendus

store.rb

@@ -1 +1,148 @@
-# Yout little input goes here!
+#encoding: utf-8
+
+require 'rubygems'
+require 'json'
+
+class Store
+	attr_accessor :items, :total_sale
+
+	def initialize *args
+		super *args
+    @items = []
+		@total_sale=0
+	end
+
+	def import_items(filename)
+		file = open(filename)
+		parsed = JSON.parse(file.read)
+		parsed.each do |item|
+      search_item = item.reject {|key,value| key == "in_store" }
+      found_item_list= @items.select { |i| i.includes_hash?(search_item)}
+      found_item=item
+      if found_item_list!=[]
+        found_item=found_item_list.first
+        @items.delete(found_item)
+        found_item["in_store"]+=item["in_store"]
+      end
+      @items.push(item)
+		end	
+	end
+	def search(item = {})
+    @items.select { |i| i.includes_hash?(item)}
+	end
+
+	def items_sorted_by(label,direction)
+		[email protected]_by{ |i| i["#{label}"] }
+		if direction == :desc
+			sorted=sorted.reverse
+		end
+		sorted
+	end
+
+	def categories
+		@items.inject([]) { |result,i| result << i["category"] unless result.include?(i["category"]); result }	
+	end
+
+	def unique_articles_in_category(category)
+		@items.inject([]) { |articles,i| articles << i['name'] unless i['category'] != category || articles.include?(i['name']); articles }
+	end
+	def total_sale
+		@total_sale.round(2)
+	end
+	class Cart < Struct.new(:store)
+		attr_accessor :items_in_cart,:store
+		def initialize(store)
+      @store=store;
+			@items_in_cart=[]
+		end
+		def store
+			@store	
+		end
+
+		def items
+			@items_in_cart
+		end
+
+		def total_cost
+			@items_in_cart.inject(0.0) { |result,i| result + i["price"]*i["quantity"]}.round(2)
+		end
+
+		def total_items
+			@items_in_cart.inject(0) { |result,i| result + i["quantity"]}	
+		end
+
+
+		def add_item(item, quantity = 1)
+      if @store.search(item) != []
+        found_item_list= @items_in_cart.select { |i| i.includes_hash?(item)}
+        found_item=item.dup
+        if found_item_list==[]
+          quantity = item["in_store"] unless item["in_store"]>quantity
+        else
+          found_item=found_item_list.first.dup
+          @items_in_cart.delete(found_item)
+          quantity = quantity + found_item["quantity"]
+          quantity = item["in_store"] unless item["in_store"]>quantity
+        end
+        found_item["quantity"]=quantity
+        if found_item["quantity"] != 0
+          @items_in_cart.push(found_item)
+        end
+      end
+    end
+    def unique_items
+      @items_in_cart.inject([]) { |result,i| result << i.reject {|key,value| key == "quantity" }}
+    end
+
+    def checkout!
+      @store.total_sale = total_cost;
+      @items_in_cart.each {|i| checkout_item(i)}
+      @items_in_cart=[]
+    end
+
+    def checkout_item(item)
+        search_item=item.reject {|key,value| key == "quantity" }
+        found_item= @store.items.select { |i| i.includes_hash?(search_item)}.first
+        found_item["in_store"]-=item["quantity"]
+    end
+  end
+end
+
+class Hash
+  def category
+    self["category"]
+  end
+  def color
+    self["color"]
+  end
+  def size
+    self["size"]
+  end
+  def in_store
+    self["in_store"]
+  end
+  def price
+    self["price"]
+  end
+  def name
+    self["name"]
+  end
+
+  def includes_hash?(other)
+    included = true
+    other.each do |key, value|
+      if key == :available
+        if value && self["in_store"] > 0 || !value && self["in_store"] == 0
+          include&=true
+        else
+          return false
+        end
+      elsif self["#{key}"].is_a?(String) && value.is_a?(String)
+        included &= self["#{key}"].casecmp(value) == 0
+      else
+        included &= self["#{key}"] == value
+      end
+    end
+    included
+  end
+end