[Protocol] Add tournament state event and tournament game commands

Adds the protocol layer for the tournament game mode:
- Event_TournamentState (2027) carrying phase, round counters, player
  standings, pairings, and settings (games_per_match)
- Command_ReportMatchResult / Command_AdvanceTournament /
  Command_TournamentSettingsSelect game command extensions (1037-1039)
- is_tournament flag on Command_CreateGame and ServerInfo_Game;
  is_tournament and parent_game_id on Event_GameStateChanged


Took 13 minutes

libcockatrice_protocol/libcockatrice/protocol/pb/CMakeLists.txt

@@ -60,6 +60,7 @@ set(PROTO_FILES
     command_set_sideboard_lock.proto
     command_set_sideboard_plan.proto
     command_shuffle.proto
+    command_tournament.proto
     command_undo_draw.proto
     commands.proto
     context_concede.proto
@@ -118,6 +119,7 @@ set(PROTO_FILES
     event_set_card_counter.proto
     event_set_counter.proto
     event_shuffle.proto
+    event_tournament_state.proto
     event_user_joined.proto
     event_user_left.proto
     event_user_message.proto

libcockatrice_protocol/libcockatrice/protocol/pb/command_tournament.proto

@@ -0,0 +1,26 @@
+syntax = "proto2";
+import "game_commands.proto";
+import "event_tournament_state.proto";
+
+message Command_ReportMatchResult {
+    extend GameCommand {
+        optional Command_ReportMatchResult ext = 1037;
+    }
+
+    optional sint32 game_id = 1 [default = -1];
+    optional sint32 winner_id = 2 [default = -1];
+}
+
+message Command_AdvanceTournament {
+    extend GameCommand {
+        optional Command_AdvanceTournament ext = 1038;
+    }
+}
+
+message Command_TournamentSettingsSelect {
+    extend GameCommand {
+        optional Command_TournamentSettingsSelect ext = 1039;
+    }
+
+    optional TournamentSettings settings = 1;
+}

libcockatrice_protocol/libcockatrice/protocol/pb/event_game_state_changed.proto

@@ -24,4 +24,10 @@ message Event_GameStateChanged {
 
     // the amount of seconds since the game started
     optional uint32 seconds_elapsed = 5;
+
+    // whether this game is a tournament game
+    optional bool is_tournament = 9;
+
+    // for tournament sub-games: the ID of the parent tournament game (-1 if not a sub-game)
+    optional sint32 parent_game_id = 10 [default = -1];
 }

libcockatrice_protocol/libcockatrice/protocol/pb/event_tournament_state.proto

@@ -0,0 +1,43 @@
+syntax = "proto2";
+import "game_event.proto";
+
+message TournamentPlayer {
+    optional sint32 player_id = 1;
+    optional string player_name = 2;
+    optional uint32 wins = 3;
+    optional uint32 losses = 4;
+    optional uint32 draws = 5;
+    optional bool deck_submitted = 6;
+}
+
+message TournamentPairing {
+    optional sint32 player1_id = 1;
+    optional sint32 player2_id = 2 [default = -1];
+    optional sint32 game_id = 3;
+    optional sint32 winner_id = 4 [default = -1];
+    optional sint32 player1_match_wins = 5 [default = 0];
+    optional sint32 player2_match_wins = 6 [default = 0];
+}
+
+message TournamentSettings {
+    optional uint32 games_per_match = 1 [default = 1];
+}
+
+message Event_TournamentState {
+    extend GameEvent {
+        optional Event_TournamentState ext = 2027;
+    }
+
+    enum TournamentPhase {
+        PHASE_DECK_BUILDING = 0;
+        PHASE_PLAYING = 1;
+        PHASE_FINISHED = 2;
+    }
+
+    optional TournamentPhase phase = 1;
+    optional uint32 current_round = 2;
+    optional uint32 total_rounds = 3;
+    repeated TournamentPlayer players = 4;
+    repeated TournamentPairing pairings = 5;
+    optional TournamentSettings settings = 6;
+}

libcockatrice_protocol/libcockatrice/protocol/pb/game_commands.proto

@@ -180,6 +180,15 @@ message GameCommand {
         /// Server: Server_Player::cmdSetPlaymat
         /// Client: reflected via player properties changed event
         SET_PLAYMAT = 1035;
+
+        /// Report the result of a tournament match sub-game.
+        REPORT_MATCH_RESULT = 1037;
+
+        /// Advance the tournament to the next round.
+        ADVANCE_TOURNAMENT = 1038;
+
+        /// Select tournament settings.
+        TOURNAMENT_SETTINGS_SELECT = 1039;
     }
 
     extensions 100 to max;

libcockatrice_protocol/libcockatrice/protocol/pb/game_event.proto

@@ -34,6 +34,7 @@ message GameEvent {
         CHANGE_ZONE_PROPERTIES = 2020;
         REVERSE_TURN = 2021;
         GAME_LOG_NOTICE = 2022;
+        TOURNAMENT_STATE = 2027;
     }
     optional sint32 player_id = 1 [default = -1];
     extensions 100 to max;

libcockatrice_protocol/libcockatrice/protocol/pb/room_commands.proto

@@ -69,6 +69,12 @@ message Command_CreateGame {
 
     // share decklists with all players when selected
     optional bool share_decklists_on_load = 14;
+
+    // number of games per match in tournament mode (e.g. 3 for best of 3)
+    optional uint32 games_per_match = 15 [default = 1];
+
+    // whether this is a tournament game
+    optional bool is_tournament = 16;
 }
 
 message Command_JoinGame {

libcockatrice_protocol/libcockatrice/protocol/pb/serverinfo_game.proto

@@ -65,4 +65,7 @@ message ServerInfo_Game {
 
     // the current host of the game, which may differ from the creator after a host transfer
     optional ServerInfo_User host_info = 53;
+
+    // whether this game is a tournament game
+    optional bool is_tournament = 54;
 }