1 files changed, 114 insertions, 0 deletions
diff --git a/src/battle/struct/btl_battle_action.erl b/src/battle/struct/btl_battle_action.erl
new file mode 100644
index 0000000..307043a
--- /dev/null
+++ b/src/battle/struct/btl_battle_action.erl
@@ -0,0 +1,114 @@
+-module(btl_battle_action).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-record
+(
+   move,
+   {
+      path :: list(btl_direction:enum())
+   }
+).
+
+-record
+(
+   switch_weapon,
+   {
+   }
+).
+
+-record
+(
+   attack,
+   {
+      target_ix :: non_neg_integer()
+   }
+).
+
+-type category() :: ('move' | 'switch_weapon' | 'attack' | 'nothing').
+-opaque type() :: (#move{} | #switch_weapon{} | #attack{}).
+
+-export_type([category/0, type/0]).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-export
+(
+   [
+      decode/1,
+      can_follow/2
+   ]
+).
+
+-export
+(
+   [
+      get_path/1,
+      get_target_ix/1,
+      get_category/1
+   ]
+).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-spec decode_mov_action (map()) -> type().
+decode_mov_action (JSONMap) ->
+   PathInBinary = maps:get(<<"p">>, JSONMap),
+   Path = lists:map(fun btl_direction:decode/1, PathInBinary),
+
+   #move { path = Path }.
+
+-spec decode_atk_action (map()) -> type().
+decode_atk_action (JSONMap) ->
+   TargetIX = maps:get(<<"tix">>, JSONMap),
+
+   #attack { target_ix = TargetIX }.
+
+-spec decode_swp_action (map()) -> type().
+decode_swp_action (_JSONMap) ->
+   #switch_weapon{}.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-spec decode (map()) -> type().
+decode (EncodedAction) ->
+   JSONActionMap = EncodedAction, %jiffy:decode(EncodedAction, [return_maps]),
+   ActionType = maps:get(<<"t">>, JSONActionMap),
+   case ActionType of
+      <<"mov">> -> decode_mov_action(JSONActionMap);
+      <<"atk">> -> decode_atk_action(JSONActionMap);
+      <<"swp">> -> decode_swp_action(JSONActionMap)
+   end.
+
+-spec can_follow (category(), category()) -> boolean().
+can_follow (nothing, attack) -> true;
+can_follow (nothing, switch_weapon) -> true;
+can_follow (nothing, move) -> true;
+can_follow (switch_weapon, attack) -> true;
+can_follow (move, attack) -> true;
+can_follow (_, _) -> false.
+
+-spec get_path (type()) -> list(btl_direction:type()).
+get_path (Action) when is_record(Action, move) ->
+   Action#move.path;
+get_path (_) ->
+   [].
+
+-spec get_target_ix (type()) -> non_neg_integer().
+get_target_ix (Action) when is_record(Action, attack) ->
+   Action#attack.target_ix;
+get_target_ix (_) ->
+   [].
+
+-spec get_category (type()) -> category().
+get_category (Action) when is_record(Action, attack) -> attack;
+get_category (Action) when is_record(Action, move) -> move;
+get_category (Action) when is_record(Action, switch_weapon) -> switch_weapon;
+get_category (Action) ->
+   io:format("How'd you get there?~p~n", [Action]),
+   true = Action.
+