1 files changed, 121 insertions, 0 deletions
diff --git a/src/battlemap/struct/bm_battlemap.erl b/src/battlemap/struct/bm_battlemap.erl
new file mode 100644
index 0000000..c3eabb0
--- /dev/null
+++ b/src/battlemap/struct/bm_battlemap.erl
@@ -0,0 +1,121 @@
+-module(bm_battlemap).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-type id() :: binary().
+
+-record
+(
+   battlemap,
+   {
+      id :: id(),
+      width :: integer(),
+      height :: integer(),
+      tile_ids :: array:array(bm_tile:id())
+   }
+).
+
+-opaque type() :: #battlemap{}.
+
+-export_type([type/0, id/0]).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%% Accessors
+-export
+(
+   [
+      get_id/1,
+      get_width/1,
+      get_height/1,
+      get_tile_ids/1,
+      get_tile_id/2
+   ]
+).
+
+-export
+(
+   [
+      random/3
+   ]
+).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-spec generate_random_tile_ids
+   (
+      bm_tile:id(),
+      list(bm_tile:id()),
+      non_neg_integer(),
+      non_neg_integer(),
+      non_neg_integer()
+   )
+   -> list(bm_tile:id()).
+generate_random_tile_ids (_PreviousTileID, Result, _X, 0, _Width) ->
+   Result;
+generate_random_tile_ids (PreviousTileID, Result, 0, Y, Width) ->
+   generate_random_tile_ids(PreviousTileID, Result, Width, (Y - 1), Width);
+generate_random_tile_ids (PreviousTileID, Result, X, Y, Width) ->
+   NewTile =
+      case sh_roll:percentage() of
+         N when (N >= 10) -> PreviousTileID;
+         _ -> bm_tile:random_id()
+      end,
+   generate_random_tile_ids(NewTile, [NewTile|Result], (X - 1), Y, Width).
+
+-spec location_to_array_index
+   (
+      non_neg_integer(),
+      bm_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#battlemap.id.
+
+-spec get_width (type()) -> integer().
+get_width (Battlemap) -> Battlemap#battlemap.width.
+
+-spec get_height (type()) -> integer().
+get_height (Battlemap) -> Battlemap#battlemap.height.
+
+-spec get_tile_ids (type()) -> array:array(bm_tile:id()).
+get_tile_ids (Battlemap) -> Battlemap#battlemap.tile_ids.
+
+-spec get_tile_id (bm_location:type(), type()) -> bm_tile:id().
+get_tile_id (Location, Battlemap) ->
+   TileIX = location_to_array_index(Battlemap#battlemap.width, Location),
+   array:get(TileIX, Battlemap#battlemap.tile_ids).
+
+-spec random
+   (
+      non_neg_integer(),
+      non_neg_integer(),
+      non_neg_integer()
+   )
+   -> type().
+random (ID, Width, Height) ->
+   InitialTile = bm_tile:random_id(),
+   TileIDs = generate_random_tile_ids(InitialTile, [], Width, Height, Width),
+
+   #battlemap
+   {
+      id = list_to_binary(integer_to_list(ID)),
+      width = Width,
+      height = Height,
+      tile_ids = array:from_list(TileIDs)
+   }.