Trying to tidy up this mess.

1 files changed, 179 insertions, 0 deletions

diff --git a/src/query/character_turn.erl b/src/query/character_turn.erl
new file mode 100644
index 0000000..cf55585
--- /dev/null
+++ b/src/query/character_turn.erl
@@ -0,0 +1,179 @@
+-module(character_turn).
+-record
+(
+   input,
+   {
+      session_token,
+      player_id,
+      battlemap_id,
+      instance_id,
+      char_id,
+      path,
+      target_id
+   }
+).
+-record
+(
+   query_state,
+   {
+      input,
+      battlemap,
+      battlemap_inst,
+      main_char,
+      main_char_inst,
+      main_char_new_loc,
+      target_char,
+      target_char_inst
+   }
+).
+-export([out/1]).
+
+parse_input (Req) ->
+   JSONReqMap = jiffy:decode(Req, [return_maps]),
+   #input
+   {
+      session_token = maps:get(<<"session_token">>, JSONReqMap),
+      player_id = maps:get(<<"player_id">>, JSONReqMap),
+      battlemap_id = maps:get(<<"battlemap_id">>, JSONReqMap),
+      instance_id = maps:get(<<"instance_id">>, JSONReqMap),
+      char_id = maps:get(<<"char_id">>, JSONReqMap),
+      path = maps:get(<<"path">>, JSONReqMap),
+      target_id = maps:get(<<"target_id">>, JSONReqMap)
+   }.
+
+fetch_data (Input) ->
+   Battlemap = timed_cache:fetch(battlemap_db, Input#input.battlemap_id),
+   BattlemapInst =
+      timed_cache:fetch
+      (
+         battlemap_instance_db,
+         <<"0">>
+      ),
+   MainChar = timed_cache:fetch(character_db, Input#input.char_id),
+   MainCharInst =
+      battlemap_instance:get_char_instance
+      (
+         BattlemapInst,
+         Input#input.char_id
+      ),
+   case Input#input.target_id of
+      <<"">> ->
+         TargetChar = nothing,
+         TargetCharInst = nothing;
+
+      TargetID ->
+         TargetChar = timed_cache:fetch(character_db, TargetID),
+         TargetCharInst =
+            battlemap_instance:get_char_instance
+            (
+               BattlemapInst,
+               TargetID
+            )
+   end,
+   #query_state
+   {
+      input = Input,
+      battlemap = Battlemap,
+      battlemap_inst = BattlemapInst,
+      main_char = MainChar,
+      main_char_inst = MainCharInst,
+      main_char_new_loc = nothing,
+      target_char = TargetChar,
+      target_char_inst = TargetCharInst
+   }.
+
+assert_main_char_can_be_used (QueryState) ->
+   false = character_instance:is_dead(QueryState#query_state.main_char_inst),
+   true =
+      battlemap_instance:can_play_char_instance
+      (
+         QueryState#query_state.battlemap_inst,
+         QueryState#query_state.input#input.player_id,
+         QueryState#query_state.input#input.char_id
+      ).
+
+handle_main_char_movement (QueryState) ->
+   {X, Y} =
+      battlemap:cross
+      (
+         QueryState#query_state.battlemap,
+         character_instance:get_location(QueryState#query_state.main_char_inst),
+         character:get_movement_points(QueryState#query_state.main_char),
+         QueryState#query_state.input#input.path,
+         battlemap_instance:get_char_instances
+         (
+            QueryState#query_state.battlemap_inst
+         )
+      ),
+   QueryState#query_state
+   {
+      battlemap_inst =
+         battlemap_instance:set_char_instance
+         (
+            battlemap_instance:post_play_char_instance
+            (
+               QueryState#query_state.battlemap_inst,
+               QueryState#query_state.input#input.char_id
+            ),
+            QueryState#query_state.input#input.char_id,
+            character_instance:set_location
+            (
+               QueryState#query_state.main_char_inst,
+               X,
+               Y
+            )
+         ),
+      main_char_new_loc = {X, Y}
+   }.
+
+handle_target (QueryState)
+   when (QueryState#query_state.target_char_inst == nothing) ->
+   QueryState;
+handle_target (QueryState) ->
+   TargetLoc =
+      character_instance:get_location(QueryState#query_state.main_char_inst),
+   Dist =
+      battlemap:dist(QueryState#query_state.main_char_new_loc, TargetLoc),
+   true =
+      (Dist =< character:get_attack_range(QueryState#query_state.main_char)),
+   %% TODO: test for (and handle) riposte.
+   QueryState#query_state
+   {
+      battlemap_inst =
+         battlemap_instance:set_char_instance
+         (
+            QueryState#query_state.battlemap_inst,
+            QueryState#query_state.input#input.target_id,
+            character_instance:mod_health
+            (
+               QueryState#query_state.target_char_inst,
+               -1,
+               character:get_max_health(QueryState#query_state.main_char)
+            )
+         )
+   }.
+
+handle (Req) ->
+   %%%% Parse
+   Input = parse_input(Req),
+   %%%% Fetch
+   QueryState = fetch_data(Input),
+   %%%% Calc
+   assert_main_char_can_be_used(QueryState),
+   NQueryState = handle_target(handle_main_char_movement(QueryState)),
+   %%%% Commit
+   database_shim:commit
+   (
+      battlemap_instance_db,
+      <<"0">>,
+      NQueryState#query_state.battlemap_inst
+   ),
+   %%%% Reply
+   jiffy:encode([[<<"okay">>]]).
+
+out(A) ->
+   {
+      content,
+      "application/json; charset=UTF-8",
+      handle(A#arg.clidata)
+   }.