1 files changed, 175 insertions, 0 deletions
diff --git a/src/map/query/map_update.erl b/src/map/query/map_update.erl
new file mode 100644
index 0000000..258a516
--- /dev/null
+++ b/src/map/query/map_update.erl
@@ -0,0 +1,175 @@
+-module(map_update).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-include("../../../include/yaws_api.hrl").
+
+-record
+(
+   input,
+   {
+      player_id :: binary(),
+      session_token :: binary(),
+      map_id :: binary(),
+      w :: non_neg_integer(),
+      h :: non_neg_integer(),
+      t :: list(list(non_neg_integer()))
+   }
+).
+
+-record
+(
+   query_state,
+   {
+      map :: map_map:type()
+   }
+).
+
+-type input() :: #input{}.
+-type query_state() :: #query_state{}.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-export([out/1]).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-spec parse_input (binary()) -> input().
+parse_input (Req) ->
+   JSONReqMap = jiffy:decode(Req, [return_maps]),
+   PlayerID = maps:get(<<"pid">>, JSONReqMap),
+   SessionToken =  maps:get(<<"stk">>, JSONReqMap),
+   MapID = maps:get(<<"mid">>, JSONReqMap),
+   MapWidth = maps:get(<<"w">>, JSONReqMap),
+   MapHeight = maps:get(<<"h">>, JSONReqMap),
+   MapContent = maps:get(<<"t">>, JSONReqMap),
+
+   true = (MapWidth > 0),
+   true = (MapHeight > 0),
+   true = (length(MapContent) == MapWidth * MapHeight),
+   true =
+      lists:all
+      (
+         fun (T) ->
+            [M|[V|B]] = T,
+            (
+               (M > 0)
+               and (V >= 0)
+               and ((length(B) rem 2) == 0)
+               and
+               lists:all
+               (
+                  fun (Bo) ->
+                     %% FIXME: this does not prevent "Error" tiles.
+                     (Bo >= 0)
+                  end,
+                  B
+               )
+            )
+         end,
+         MapContent
+      ),
+
+   #input
+   {
+      player_id = PlayerID,
+      session_token = SessionToken,
+      map_id = MapID,
+      w = MapWidth,
+      h = MapHeight,
+      t = MapContent
+   }.
+
+-spec fetch_data (input()) -> query_state().
+fetch_data (Input) ->
+   PlayerID = Input#input.player_id,
+   MapID = Input#input.map_id,
+
+   Map = shr_timed_cache:fetch(map_db, PlayerID, MapID),
+
+   #query_state
+   {
+      map = Map
+   }.
+
+-spec update_data (query_state(), input()) -> query_state().
+update_data (QueryState, Input) ->
+   QueryState#query_state
+   {
+      map =
+         map_map:update_from_list
+         (
+            QueryState#query_state.map,
+            Input#input.w,
+            Input#input.h,
+            Input#input.t
+         )
+   }.
+
+-spec commit_update (query_state(), input()) -> 'ok'.
+commit_update (QueryState, Input) ->
+   PlayerID = Input#input.player_id,
+   MapID = Input#input.map_id,
+   Map = QueryState#query_state.map,
+
+   Query =
+      shr_db_query:new
+      (
+         map_db,
+         MapID,
+         {user, PlayerID},
+         [
+            shr_db_query:set_field
+            (
+               map_map:get_height_field(),
+               Input#input.h
+            ),
+            shr_db_query:set_field
+            (
+               map_map:get_width_field(),
+               Input#input.w
+            ),
+            shr_db_query:set_field
+            (
+               map_map:get_tile_instances_field(),
+               map_map:get_tile_instances(Map)
+            )
+         ]
+      ),
+
+   shr_database:commit(Query),
+   shr_timed_cache:update(map_db, PlayerID, MapID, Map),
+
+   'ok'.
+
+-spec generate_reply () -> binary().
+generate_reply () ->
+   jiffy:encode([shr_okay:generate()]).
+
+-spec handle (binary()) -> binary().
+handle (Req) ->
+   Input = parse_input(Req),
+   shr_security:assert_identity
+   (
+      Input#input.player_id,
+      Input#input.session_token
+   ),
+   shr_security:lock_queries(Input#input.player_id),
+   QueryState = fetch_data(Input),
+   Update = update_data(QueryState, Input),
+   commit_update(Update, Input),
+   shr_security:unlock_queries(Input#input.player_id),
+   generate_reply().
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+out(A) ->
+   {
+      content,
+      "application/json; charset=UTF-8",
+      handle(A#arg.clidata)
+   }.