Add basic hard filter adding js infrastructure for BPE

app/assets/javascripts/admin/bulk_product_update.js.coffee

@@ -138,10 +138,15 @@ productsApp.controller "AdminBulkProductsCtrl", [
       ["Items", "items"]
     ]
 
+    $scope.filterTypes = [
+      { name: "Equals",    ransack_predicate: "eq" }
+    ]
+
     $scope.perPage = 25
     $scope.currentPage = 1
     $scope.products = []
     $scope.filteredProducts = []
+    $scope.currentFilters = []
     $scope.totalCount = -> $scope.filteredProducts.length
     $scope.totalPages = -> Math.ceil($scope.totalCount()/$scope.perPage)
     $scope.firstVisibleProduct = -> ($scope.currentPage-1)*$scope.perPage+1
@@ -225,6 +230,12 @@ productsApp.controller "AdminBulkProductsCtrl", [
       onHand
 
 
+    $scope.addFilter = (filter) ->
+      if Object.keys($scope.columns).indexOf(filter.property) >= 0
+        if $scope.filterTypes.map( (filter_type) -> filter_type.ransack_predicate ).indexOf(filter.ransack_predicate) >= 0
+          $scope.currentFilters.push filter
+
+
     $scope.editWarn = (product, variant) ->
       if ($scope.dirtyProductCount() > 0 and confirm("Unsaved changes will be lost. Continue anyway?")) or ($scope.dirtyProductCount() == 0)
         window.location = "/admin/products/" + product.permalink_live + ((if variant then "/variants/" + variant.id else "")) + "/edit"

spec/javascripts/unit/bulk_product_update_spec.js.coffee

@@ -1,4 +1,4 @@
-describe "filtering products", ->
+describe "filtering products for submission to database", ->
   it "accepts an object or an array and only returns an array", ->
     expect(filterSubmitProducts([])).toEqual []
     expect(filterSubmitProducts({})).toEqual []
@@ -639,6 +639,7 @@ describe "AdminBulkProductsCtrl", ->
         ]
         scope.updateProducts "list of dirty products"
         httpBackend.flush()
+        timeout.flush()
         expect(scope.displaySuccess).toHaveBeenCalled()
 
       it "runs displayFailure() when post return data does not match $scope.products", ->
@@ -898,6 +899,33 @@ describe "AdminBulkProductsCtrl", ->
       ]
 
 
+  describe "filtering products", ->
+    describe "adding a filter to the filter list", ->
+      it "adds objects sent to addFilter() to $scope.currentFilters", ->
+        filterObject1 = {property: "name", ransack_predicate: "eq", value: "Product1"}
+        filterObject2 = {property: "name", ransack_predicate: "eq", value: "Product2"}
+        scope.addFilter(filterObject1)
+        scope.addFilter(filterObject2)
+        expect(scope.currentFilters).toEqual [filterObject1, filterObject2]
+
+      it "ignores objects sent to addFilter() which do not contain a 'property' with a corresponding key in $scope.columns", ->
+        filterObject1 = {property: Object.keys(scope.columns)[0], ransack_predicate: "eq", value: "value1"}
+        filterObject2 = {property: Object.keys(scope.columns)[2], ransack_predicate: "eq", value: "value2"}
+        filterObject3 = {property: "some_random_property", ransack_predicate: "eq", value: "value3"}
+        scope.addFilter(filterObject1)
+        scope.addFilter(filterObject2)
+        scope.addFilter(filterObject3)
+        expect(scope.currentFilters).toEqual [filterObject1, filterObject2]
+
+      it "ignores objects sent to addFilter() which do not contain a query with a corresponding key in ", ->
+        filterObject1 = {property: Object.keys(scope.columns)[0], ransack_predicate: "eq", value: "value1"}
+        filterObject2 = {property: Object.keys(scope.columns)[2], ransack_predicate: "eq", value: "value2"}
+        filterObject3 = {property: Object.keys(scope.columns)[4], ransack_predicate: "something", value: "value3"}
+        scope.addFilter(filterObject1)
+        scope.addFilter(filterObject2)
+        scope.addFilter(filterObject3)
+        expect(scope.currentFilters).toEqual [filterObject1, filterObject2]
+
 
 describe "converting arrays of objects with ids to an object with ids as keys", ->
   it "returns an object", ->