move helpers to shops.ex, update controller

controller now uses helpers from shops.ex (same as live),
and no longer has edit/delete/create functionality

lib/pokemon_couture/shops.ex

@@ -127,4 +127,50 @@ defmodule PokemonCouture.Shops do
     |> Ecto.Changeset.put_assoc(:users, List.delete(clothes.users, user))
     |> Repo.update!()
   end
+
+  @doc """
+  Creates a a shop map.
+  %{location -> %{type -> [clothes_of_loc_and_type]}}
+  """
+  def create_shop_map() do
+    Enum.reduce(list_clothes_with_owners(), %{}, &sort_clothes_to_map/2)
+  end
+
+  defp sort_clothes_to_map(clothes, map) do
+    case map[clothes.location] do
+      nil ->
+        Map.put(map, clothes.location, %{clothes.type => [clothes]})
+      map_of_clothes when is_map(map_of_clothes) ->
+        map_of_clothes = case map_of_clothes[clothes.type] do
+          nil ->
+            Map.put(map_of_clothes, clothes.type, [clothes])
+          list_of_clothes when is_list(list_of_clothes) ->
+            Map.put(map_of_clothes, clothes.type, [clothes | list_of_clothes])
+        end
+        Map.put(map, clothes.location, map_of_clothes)
+    end
+  end
+
+  defp assign_clothespiece_to_map(clothes, map) do
+    case map[clothes.name] do
+      nil ->
+        Map.put(map, clothes.name, [clothes])
+      list_of_clothes when is_list(list_of_clothes) ->
+        Map.put(map, clothes.name, [clothes | list_of_clothes])
+    end
+  end
+
+  @doc """
+  Sorts inner maps created with create_shop_map(),
+  putting each in a different map by clothes name, then sorting by game name.
+  Resulting big map: %{location -> %{type -> %{name -> sorted_list_of_clothes}}}
+  """
+  def inner_map_creator({type, list}, acc) do
+    clothes_map = Enum.reduce(list, %{}, &assign_clothespiece_to_map/2)
+    clothes_map = for {shop, map} <- clothes_map
+                   do {shop, Enum.sort_by(map, fn %Clothes{game: game} -> game end)}
+                  end
+    Map.put(acc, type, clothes_map)
+  end
+
 end