filtering items by traits

front-api/controllers/common_for_controllers.rb

@@ -1,3 +1,7 @@
+# converts querystring to hash
+def get_querystring_hash()
+   Rack::Utils.parse_nested_query(request.query_string)
+end
 
 # converts list of parameters to array of integers
 def mass_to_i(*id_strings)

front-api/controllers/item.rb

@@ -1,5 +1,3 @@
-
-
 def prepare_items_for_mass_display(items) 
   items.to_json(
      :except => [:created_at, :current_input_price, :stock, :on_display],
@@ -21,6 +19,13 @@ get '/item/:id' do |id_s|
   prepare_items_for_mass_display(item)
 end
 
+def filter_by_traits(items)
+  get_querystring_hash.each do |k,v|
+    items = items.where(["traits ->> '#{k}' = '#{v}'"])
+  end
+  items
+end
+
 
 # gets items regardless of classification ( useful for frontpage )
 get '/item/offset/:offset/limit/:limit' do |offset_s, limit_s|
@@ -42,6 +47,7 @@ get '/item/section/:section_id/offset/:offset/limit/:limit' do |section_id_s, of
   prepare_items_for_mass_display(items)
 end
 
+
 # gets items in category ( useful for page showing single category )
 get '/item/category/:category_id/offset/:offset/limit/:limit' do |category_id_s, offset_s, limit_s|
   category_id, offset, limit = mass_to_i(category_id_s, offset_s, limit_s)
@@ -49,6 +55,8 @@ get '/item/category/:category_id/offset/:offset/limit/:limit' do |category_id_s,
   return [].to_json if input_invalid 
 
   items = Item.best_selling_in_category(category_id, offset,limit)
+  items = filter_by_traits(items)
+
   prepare_items_for_mass_display(items)
 end