add set-ep3-menu-song

src/ReceiveCommands.cc

@@ -371,6 +371,10 @@ void process_login_d_e_pc_gc(shared_ptr<ServerState> s, shared_ptr<Client> c,
     c->bb_player_index = 0;
   }
 
+  if ((c->flags & ClientFlag::Episode3Games) && (s->ep3_menu_song >= 0)) {
+    send_ep3_change_music(c, s->ep3_menu_song);
+  }
+
   send_update_client_config(c);
 
   process_login_complete(s, c);

src/ServerShell.cc

@@ -57,7 +57,13 @@ Commands:\n\
     Enable or disable allowing unregistered users on the server. Disabling this\n\
     does not disconnect unregistered users who are already connected.\n\
   set-event <event>\n\
-    Set the event in all lobbies.\n\
+    Set the event in all lobbies, and in the main menu before joining a lobby.\n\
+    <event> can be none, xmas, val, easter, hallo, sonic, newyear, summer,\n\
+    white, wedding, fall, s-spring, s-summer, or spring.\n\
+  set-ep3-menu-song <song-num>\n\
+    Set the song that plays in the main menu for Episode III clients. If an\n\
+    event is also set, the event's visuals appear but this song still plays.\n\
+    Song IDs are 0 through 51; the default song is -1.\n\
   announce <message>\n\
     Send an announcement message to all players.\n\
 ");
@@ -176,6 +182,9 @@ Commands:\n\
     }
     send_change_event(this->state, event_id);
 
+  } else if (command_name == "set-ep3-menu-song") {
+    this->state->ep3_menu_song = stoul(command_args, nullptr, 0);
+
   } else if (command_name == "announce") {
     u16string message16 = decode_sjis(command_args);
     send_text_message(this->state, message16.c_str());

src/ServerState.cc

@@ -18,7 +18,8 @@ ServerState::ServerState()
     ip_stack_debug(false),
     allow_unregistered_users(false),
     run_shell_behavior(RunShellBehavior::Default), next_lobby_id(1),
-    pre_lobby_event(0) {
+    pre_lobby_event(0),
+    ep3_menu_song(-1) {
   memset(&this->default_key_file, 0, sizeof(this->default_key_file));
 
   this->main_menu.emplace_back(MAIN_MENU_GO_TO_LOBBY, u"Go to lobby",

src/ServerState.hh

@@ -56,6 +56,7 @@ struct ServerState {
   std::map<int64_t, std::shared_ptr<Lobby>> id_to_lobby;
   std::atomic<int32_t> next_lobby_id;
   uint8_t pre_lobby_event;
+  int32_t ep3_menu_song;
 
   std::map<std::string, uint32_t> all_addresses;
   uint32_t local_address;