Split dirtyProducts out into its own service

spec/javascripts/unit/admin/services/dirty_products_spec.js.coffee

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+describe "Maintaining a live record of dirty products and properties", ->
+  DirtyProducts = null
+  
+  beforeEach ->
+    module "ofn.admin"
+
+  beforeEach inject (_DirtyProducts_) ->
+    DirtyProducts = _DirtyProducts_
+
+  describe "adding a new change", ->
+    it "adds a new object with key of id if it does not already exist", ->
+      expect(DirtyProducts.all()).toEqual {}
+      expect(DirtyProducts.all()["1"]).not.toBeDefined()
+      DirtyProducts.addProductProperty 1, "propertyName", { a: 1 }
+      expect(DirtyProducts.all()["1"]).toBeDefined()
+
+    it "adds an id attribute to newly created objects in dirtyProducts", ->
+      expect(DirtyProducts.all()).toEqual {}
+      DirtyProducts.addProductProperty 1, "propertyName", "val1"
+      expect(DirtyProducts.all()["1"]).toBeDefined()
+      expect(DirtyProducts.all()["1"]["id"]).toBeDefined()
+      expect(DirtyProducts.all()["1"]["id"]).toBe 1
+
+    it "adds a new object with key of the altered attribute name if it does not already exist", ->
+      DirtyProducts.addProductProperty 1, "propertyName", { a: 1 }
+      expect(DirtyProducts.all()["1"]).toBeDefined()
+      expect(DirtyProducts.all()["1"]["propertyName"]).toEqual { a: 1 }
+
+    it "replaces the existing object when adding a change to an attribute which already exists", ->
+      DirtyProducts.addProductProperty 1, "propertyName", "val1"
+      expect(DirtyProducts.all()["1"]).toBeDefined()
+      expect(DirtyProducts.all()["1"]["propertyName"]).toBe "val1"
+      DirtyProducts.addProductProperty 1, "propertyName", "val2"
+      expect(DirtyProducts.all()["1"]["propertyName"]).toBe "val2"
+
+   it "adds an attribute to key to a line item object when one already exists", ->
+      DirtyProducts.addProductProperty 1, "propertyName1", "val1"
+      DirtyProducts.addProductProperty 1, "propertyName2", "val2"
+      expect(DirtyProducts.all()["1"]).toBeDefined()
+      expect(DirtyProducts.all()["1"].hasOwnProperty "propertyName1").toBe true
+      expect(DirtyProducts.all()["1"]["propertyName1"]).toBe "val1"
+      expect(DirtyProducts.all()["1"].hasOwnProperty "propertyName2").toBe true
+      expect(DirtyProducts.all()["1"]["propertyName2"]).toBe "val2"
+
+  describe "clearing all existing changes", ->
+    it "resets pendingChanges object", ->
+      DirtyProducts.addProductProperty 1, "PropertyName1", "val1"
+      DirtyProducts.addProductProperty 1, "PropertyName2", "val2"
+      expect(DirtyProducts.all()["1"]["PropertyName1"]).toBeDefined()
+      expect(DirtyProducts.all()["1"]["PropertyName2"]).toBeDefined()
+      DirtyProducts.clear()
+      expect(DirtyProducts.all()["1"]).not.toBeDefined()
+      expect(DirtyProducts.all()).toEqual {}
+
+  describe "removing an existing dirty product", ->
+    it "deletes a change if it exists", ->
+      DirtyProducts.addProductProperty 1, "PropertyName1", "val1"
+      DirtyProducts.addProductProperty 2, "PropertyName2", "val2"
+      expect(DirtyProducts.all()["1"]["PropertyName1"]).toBeDefined()
+      DirtyProducts.deleteProduct 1
+      expect(DirtyProducts.all()["1"]).not.toBeDefined()
+      expect(DirtyProducts.all()["2"]).toBeDefined()
+      
+    it "does nothing if id key does not exist", ->
+      DirtyProducts.addProductProperty 1, "PropertyName1", "val1"
+      expect(DirtyProducts.all()["1"]["PropertyName1"]).toBeDefined()
+      DirtyProducts.deleteProduct 3
+      expect(DirtyProducts.all()["1"]["PropertyName1"]).toEqual "val1"
+
+  describe "removing an attribute of an existing dirty product", ->
+    it "removes the attribute", ->
+      DirtyProducts.addProductProperty 1, "PropertyName1", "val1"
+      DirtyProducts.addProductProperty 1, "PropertyName2", "val2"
+      DirtyProducts.removeProductProperty 1, "PropertyName1"
+      expect(DirtyProducts.all()["1"]["PropertyName1"]).not.toBeDefined()
+      expect(DirtyProducts.all()["1"]["PropertyName2"]).toBeDefined()
+    
+    it "calls deleteProduct on the productID if no other properties are defined on it", ->
+      spyOn(DirtyProducts, "deleteProduct")
+      DirtyProducts.addProductProperty 1, "PropertyName1", "val1"
+      DirtyProducts.removeProductProperty 1, "PropertyName1"
+      expect(DirtyProducts.deleteProduct).toHaveBeenCalledWith 1
+
+  describe "removing an existing dirty variant", ->
+    it "removes the variant from the variants object", ->
+      DirtyProducts.addVariantProperty 1, 3, "PropertyName1", "val1"
+      DirtyProducts.addProductProperty 1, "PropertyName2", "val2"
+      DirtyProducts.deleteVariant 1, 3
+      expect(DirtyProducts.all()["1"]["variants"]).not.toBeDefined()
+
+    it "calls removeProductProperty on the products if the variants list becomes empty", ->
+      spyOn(DirtyProducts, "removeProductProperty")
+      DirtyProducts.addVariantProperty 1, 3, "PropertyName1", "val1"
+      DirtyProducts.addProductProperty 1, "PropertyName2", "val2"
+      DirtyProducts.deleteVariant 1, 3
+      expect(DirtyProducts.removeProductProperty).toHaveBeenCalledWith 1, "variants"
+
+  describe "removing an attribute of an existing dirty variant", ->
+    it "removes the attribute from the variant object", ->
+      DirtyProducts.addVariantProperty 1, 3, "PropertyName1", "val1"
+      DirtyProducts.addVariantProperty 1, 3, "PropertyName2", "val2"
+      DirtyProducts.removeVariantProperty 1, 3, "PropertyName1"
+      expect(DirtyProducts.all()["1"]["variants"]["3"]["PropertyName1"]).not.toBeDefined()
+      expect(DirtyProducts.all()["1"]["variants"]["3"]["PropertyName2"]).toBeDefined()
+    
+    it "calls deleteVariant on the variantID if no other properties are defined on it", ->
+      spyOn(DirtyProducts, "deleteVariant")
+      DirtyProducts.addVariantProperty 1, 3, "PropertyName1", "val1"
+      DirtyProducts.addProductProperty 1, "PropertyName1", "val2"
+      DirtyProducts.removeVariantProperty 1, 3, "PropertyName1"
+      expect(DirtyProducts.deleteVariant).toHaveBeenCalledWith 1, 3