1 files changed, 100 insertions, 0 deletions
diff --git a/src/battle/struct/btl_map.erl b/src/battle/struct/btl_map.erl
new file mode 100644
index 0000000..ef34833
--- /dev/null
+++ b/src/battle/struct/btl_map.erl
@@ -0,0 +1,100 @@
+-module(btl_map).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-type id() :: binary().
+
+-record
+(
+   map,
+   {
+      id :: id(),
+      width :: integer(),
+      height :: integer(),
+      tile_class_ids :: array:array(btl_tile:class_id())
+   }
+).
+
+-opaque type() :: #map{}.
+
+-export_type([type/0, id/0]).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%% Accessors
+-export
+(
+   [
+      get_id/1,
+      get_width/1,
+      get_height/1,
+      get_tile_class_ids/1,
+      get_tile_class_id/2
+   ]
+).
+
+-export
+(
+   [
+      from_list/4
+   ]
+).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-spec location_to_array_index
+   (
+      non_neg_integer(),
+      btl_location:type()
+   )
+   -> ('error' | non_neg_integer()).
+location_to_array_index (ArrayWidth, {X, Y}) ->
+   if
+      (X < 0) -> error;
+      (Y < 0) -> error;
+      (X >= ArrayWidth) -> error;
+      true -> ((Y * ArrayWidth) + X)
+   end.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%% Accessors
+-spec get_id (type()) -> id().
+get_id (Battlemap) -> Battlemap#map.id.
+
+-spec get_width (type()) -> integer().
+get_width (Battlemap) -> Battlemap#map.width.
+
+-spec get_height (type()) -> integer().
+get_height (Battlemap) -> Battlemap#map.height.
+
+-spec get_tile_class_ids (type()) -> array:array(btl_tile:class_id()).
+get_tile_class_ids (Battlemap) -> Battlemap#map.tile_class_ids.
+
+-spec get_tile_class_id (btl_location:type(), type()) -> btl_tile:class_id().
+get_tile_class_id (Location, Battlemap) ->
+   TileIX = location_to_array_index(Battlemap#map.width, Location),
+   array:get(TileIX, Battlemap#map.tile_class_ids).
+
+-spec from_list
+   (
+      non_neg_integer(),
+      non_neg_integer(),
+      non_neg_integer(),
+      list(non_neg_integer())
+   )
+   -> type().
+from_list (ID, Width, Height, List) ->
+   TileClassIDs = lists:map(fun btl_tile:class_id_from_int/1, List),
+
+   #map
+   {
+      id = list_to_binary(integer_to_list(ID)),
+      width = Width,
+      height = Height,
+      tile_class_ids = array:from_list(TileClassIDs)
+   }.