Reimplement midgame Pause Menu flow for Spectate status change

- Currently no console command, as "teamchange" no longer applies... relatively simple to add one if needed though
- Change the "Team Change" warning when allowteamchange is false to say "Joining Play"

src/d_netcmd.c

@@ -3480,10 +3480,18 @@ void P_SetPlayerSpectator(INT32 playernum)
 static void Got_Spectate(const UINT8 **cp, INT32 playernum)
 {
 	UINT8 edit_player = READUINT8(*cp);
+	UINT8 desired_state = READUINT8(*cp);
 
-	if (playernum != serverplayer && IsPlayerAdmin(playernum) == false)
+	if (playeringame[edit_player] == false)
 	{
-		CONS_Alert(CONS_WARNING, M_GetText("Illegal team change received from player %s\n"), player_names[playernum]);
+		return;
+	}
+
+	if (playernum != playerconsole[edit_player]
+	&& playernum != serverplayer
+	&& IsPlayerAdmin(playernum) == false)
+	{
+		CONS_Alert(CONS_WARNING, M_GetText("Illegal spectate command received from player %s\n"), player_names[playernum]);
 		if (server)
 		{
 			SendKick(playernum, KICK_MSG_CON_FAIL);
@@ -3497,14 +3505,8 @@ static void Got_Spectate(const UINT8 **cp, INT32 playernum)
 	}
 
 	player_t *const player = &players[edit_player];
-	if (player->spectator == true && (player->pflags & PF_WANTSTOJOIN) == 0)
-	{
-		// No change would occur.
-		return;
-	}
 
 	// Safety first!
-	// (not respawning spectators here...)
 	const boolean was_spectator = (player->spectator == true);
 	if (was_spectator == false)
 	{
@@ -3519,7 +3521,14 @@ static void Got_Spectate(const UINT8 **cp, INT32 playernum)
 		HU_AddChatText(va("\x82*%s became a spectator.", player_names[edit_player]), false);
 	}
 
-	player->pflags &= ~PF_WANTSTOJOIN;
+	if (desired_state != 0)
+	{
+		player->pflags |= PF_WANTSTOJOIN;
+	}
+	else
+	{
+		player->pflags &= ~PF_WANTSTOJOIN;
+	}
 
 	if (gamestate != GS_LEVEL || was_spectator == true)
 	{

src/menus/transient/pause-game.c

@@ -11,6 +11,7 @@
 /// \file  menus/transient/pause-game.c
 /// \brief In-game/pause menus
 
+#include "../../byteptr.h"
 #include "../../d_netcmd.h"
 #include "../../i_time.h"
 #include "../../k_menu.h"
@@ -478,50 +479,33 @@ void M_HandleSpectateToggle(INT32 choice)
 			return;
 		}
 
-		boolean tospectator = false;
+		// Identify relevant spectator state of pausemenu.splitscreenfocusid.
+		// See also M_DrawPause.
+
+		const UINT8 splitspecid =
+			g_localplayers[pausemenu.splitscreenfocusid];
+
+		const UINT8 joingame = (
+			players[splitspecid].spectator == true
+			&& ((players[splitspecid].pflags & PF_WANTSTOJOIN) == 0)
+		) ? 1 : 0;
+
+		if (joingame && !cv_allowteamchange.value)
 		{
-			// Identify relevant spectator state of pausemenu.splitscreenfocusid.
+			M_StartMessage("Joining Play", M_GetText("The server is not allowing\njoining play at this time.\n"), NULL, MM_NOTHING, NULL, NULL);
-			// See also M_DrawPause.
-
-			const UINT8 splitspecid =
-				g_localplayers[pausemenu.splitscreenfocusid];
-
-			tospectator = (
-				players[splitspecid].spectator == false
-				|| (players[splitspecid].pflags & PF_WANTSTOJOIN)
-			);
-		}
-
-		if (!tospectator && !cv_allowteamchange.value)
-		{
-			M_StartMessage("Team Change", M_GetText("The server is not allowing\nteam changes at this time.\n"), NULL, MM_NOTHING, NULL, NULL);
 			return;
 		}
 
 		M_QuitPauseMenu(-1);
 
-		const char *destinationstate = tospectator ? "spectator" : "playing";
+		// Send spectate
+		UINT8 buf[2];
+		UINT8 *p = buf;
 
-		// These console command names...
+		WRITEUINT8(p, splitspecid);
-		if (pausemenu.splitscreenfocusid == 0)
+		WRITEUINT8(p, joingame);
-		{
+
-			COM_ImmedExecute(
+		SendNetXCmd(XD_SPECTATE, &buf, p - buf);
-				va(
-					"changeteam %s",
-					destinationstate
-				)
-			);
-		}
-		else
-		{
-			COM_ImmedExecute(
-				va(
-					"changeteam%u %s",
-					pausemenu.splitscreenfocusid + 1,
-					destinationstate
-				)
-			);
-		}
 
 		return;
 	}

src/p_user.c

@@ -4866,10 +4866,11 @@ void P_CheckRaceGriefing(player_t *player, boolean dopunishment)
 			else
 			{
 				// Send spectate
-				UINT8 buf[1];
+				UINT8 buf[2];
 				UINT8 *p = buf;
 
 				WRITEUINT8(p, n);
+				WRITEUINT8(p, 0);
 
 				SendNetXCmd(XD_SPECTATE, &buf, p - buf);
 			}