Add product search (#64)

src/schema.graphql

@@ -21,9 +21,10 @@ type Query {
   order(id: ID!): Order
   products(
     pagination: PaginationInput!
-    filter: ProductsFilterInput!
+    filter: ProductsFilterInput
   ): ProductsResult
   product(id: Int!): Product
+  productsSearch(q: String!): ProductsSearchResult
   categories: [Category]
   category(id: Int!): Category
   keywords: [Keyword]
@@ -82,6 +83,18 @@ type ProductsResult {
   items: [Product]
 }
 
+type ProductsSearchResult {
+  q: String!
+  """
+  products contains matches for `name` and `artNo`
+  """
+  products: [Product]
+  batches: [Batch]
+  keywords: [Keyword]
+  categories: [Category]
+  designers: [Designer]
+}
+
 input InteriorsFilterInput {
   productId: Int!
 }
@@ -245,6 +258,11 @@ type Category {
   products: [Product]
 }
 
+type Batch {
+  name: String!
+  products: [Product]
+}
+
 type Product {
   id: ID!
   stockid: Int
@@ -378,6 +396,7 @@ type Designer {
   name: String
   path: String
   orderRows(pagination: PaginationInput!, filter: DateFilterInput): [OrderRow]
+  products: [Product]
 }
 
 enum KeywordType {