add $surrender command

src/ChatCommands.cc

@@ -1259,6 +1259,32 @@ static void server_command_enable_ep3_battle_debug_menu(
   }
 }
 
+static void server_command_surrender(
+    shared_ptr<ServerState>, shared_ptr<Lobby> l, shared_ptr<Client> c, const std::u16string&) {
+  check_is_game(l, true);
+  check_is_ep3(c, true);
+  if (l->episode != Episode::EP3) {
+    throw logic_error("non-Ep3 client in Ep3 game");
+  }
+  auto base = l->ep3_server_base;
+  if (!base) {
+    send_text_message(c, u"$C6Episode 3 server\nis not initialized");
+    return;
+  }
+  auto server = base->server;
+  if (!server) {
+    send_text_message(c, u"$C6Episode 3 server\nis not initialized");
+    return;
+  }
+  if (server->setup_phase != Episode3::SetupPhase::MAIN_BATTLE) {
+    send_text_message(c, u"$C6Battle has not\nyet started");
+    return;
+  }
+  string name = encode_sjis(c->game_data.player()->disp.name);
+  send_text_message_printf(l, "$C6%s has\nsurrendered", name.c_str());
+  server->force_battle_result(c->lobby_client_id, false);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 
 typedef void (*server_handler_t)(shared_ptr<ServerState> s, shared_ptr<Lobby> l,
@@ -1307,6 +1333,7 @@ static const unordered_map<u16string, ChatCommandDefinition> chat_commands({
     {u"$song", {server_command_song, proxy_command_song}},
     {u"$spec", {server_command_spec, nullptr}},
     {u"$ss", {nullptr, proxy_command_send_server}},
+    {u"$surrender", {server_command_surrender, nullptr}},
     {u"$swa", {server_command_switch_assist, proxy_command_switch_assist}},
     {u"$type", {server_command_lobby_type, nullptr}},
     {u"$warp", {server_command_warpme, proxy_command_warpme}},

src/Episode3/Server.cc

@@ -524,6 +524,21 @@ bool Server::check_for_battle_end() {
   return ret;
 }
 
+void Server::force_battle_result(uint8_t specified_client_id, bool set_winner) {
+  auto specified_ps = this->player_states[specified_client_id];
+  for (size_t z = 0; z < 4; z++) {
+    auto ps = this->player_states[z];
+    if (ps) {
+      ps->assist_flags &= 0xFFFFB7FB;
+      if ((ps->get_team_id() == specified_ps->get_team_id()) == set_winner) {
+        ps->assist_flags |= 4;
+      }
+      ps->update_hand_and_equip_state_and_send_6xB4x02_if_needed(true);
+    }
+  }
+  this->set_battle_ended();
+}
+
 void Server::check_for_destroyed_cards_and_send_6xB4x05_6xB4x02() {
   for (size_t z = 0; z < 4; z++) {
     if (this->player_states[z]) {
@@ -706,15 +721,15 @@ void Server::draw_phase_after() {
     }
 
     if (this->overall_time_expired || (this->round_num >= 1000)) {
-      bool unknown_v1 = true;
+      bool no_winner_specified = true;
       for (size_t z = 0; z < 4; z++) {
         auto ps = this->player_states[z];
         if (ps && (ps->assist_flags & 4)) {
-          unknown_v1 = false;
+          no_winner_specified = false;
           break;
         }
       }
-      if (unknown_v1) {
+      if (no_winner_specified) {
         this->compute_losing_team_id_and_add_winner_flags(0);
       }
       this->round_num--;

src/Episode3/Server.hh

@@ -145,6 +145,7 @@ public:
   uint16_t card_id_for_card_ref(uint16_t card_ref) const;
   bool card_ref_is_empty_or_has_valid_card_id(uint16_t card_ref) const;
   bool check_for_battle_end();
+  void force_battle_result(uint8_t surrendered_client_id, bool set_winner);
   void check_for_destroyed_cards_and_send_6xB4x05_6xB4x02();
   bool check_presence_entry(uint8_t client_id) const;
   void clear_player_flags_after_dice_phase();