Add button to allow players to change teams (#872)

Adds button and logic to allow players to switch teams. This is a feature used in FSU and popular on many servers.
Team switch is disabled via script for some gamemodes where switching teams does not make sense.

Northstar.Client/mod/resource/northstar_client_localisation_english.txt

@@ -312,6 +312,12 @@ Press Yes if you agree to this. This choice can be changed in the mods menu at a
 		// In-game chat
 		"HUD_CHAT_WHISPER_PREFIX" "[WHISPER]"
 		"HUD_CHAT_SERVER_PREFIX" "[SERVER]"
+
+		// Team Switching
+		"TEAMSWITCH_GAMEMODE"			"Gamemode does not allow Team Switching"
+		"TEAMSWITCH_BUFFER"				"Team Switching is on Cooldown"
+		"TEAMSWITCH_GAMEPLAY"			"Team change not allowed outside playing phase"
+		"TEAMSWITCH_DISABLED"			"Current gamemode doesn't support team change"
 
 		"NO_GAMESERVER_RESPONSE" 		"Couldn't reach game server"
 		"BAD_GAMESERVER_RESPONSE" 		"Game server gave an invalid response"

Northstar.Client/mod/scripts/vscripts/ui/menu_ingame.nut

@@ -85,6 +85,9 @@ void function InitInGameMPMenu()
 	var gameHeader = AddComboButtonHeader( comboStruct, headerIndex, "#MENU_HEADER_GAME" )
 	var leaveButton = AddComboButton( comboStruct, headerIndex, buttonIndex++, "#LEAVE_MATCH" )
 	Hud_AddEventHandler( leaveButton, UIE_CLICK, OnLeaveButton_Activate )
+	var teamChangeButton = AddComboButton( comboStruct, headerIndex, buttonIndex++, "#SWITCH_TEAMS" )
+	Hud_AddEventHandler( teamChangeButton, UIE_CLICK, OnRequestTeamSwitch )
+	thread UpdateTeamSwitchButton_Threaded( teamChangeButton )
 	#if DEV
 		var devButton = AddComboButton( comboStruct, headerIndex, buttonIndex++, "Dev" )
 		Hud_AddEventHandler( devButton, UIE_CLICK, AdvanceMenuEventHandler( GetMenu( "DevMenu" ) ) )
@@ -700,3 +703,21 @@ void function SetTitanSelectButtonVisibleState( bool state )
 		Hud_Hide( file.titanSelectButton )
 	}
 }
+
+void function UpdateTeamSwitchButton_Threaded( var button )
+{
+	while ( true )
+	{
+		Hud_SetLocked( button, !GetConVarBool( "ns_allow_team_change" ) )
+		wait 0.5
+	}
+}
+
+void function OnRequestTeamSwitch( var button )
+{
+	if ( !Hud_IsLocked( button ) )
+	{
+		ClientCommand( "changeteam" )
+		CloseAllMenus()
+	}
+}

Northstar.Custom/mod/scripts/vscripts/gamemodes/_gamemode_hidden.nut

@@ -11,6 +11,7 @@ void function GamemodeHidden_Init()
 	SetLoadoutGracePeriodEnabled( false ) // prevent modifying loadouts with grace period
 	SetWeaponDropsEnabled( false )
 	SetRespawnsEnabled( false )
+	SetGamemodeAllowsTeamSwitch( false )
 	Riff_ForceTitanAvailability( eTitanAvailability.Never )
 	Riff_ForceBoostAvailability( eBoostAvailability.Disabled )
 	Riff_ForceSetEliminationMode( eEliminationMode.Pilots )

Northstar.Custom/mod/scripts/vscripts/gamemodes/_gamemode_inf.gnut

@@ -11,6 +11,7 @@ void function GamemodeInfection_Init()
 	SetSpawnpointGamemodeOverride( FFA )
 	SetLoadoutGracePeriodEnabled( false ) // prevent modifying loadouts with grace period
 	SetWeaponDropsEnabled( false )
+	SetGamemodeAllowsTeamSwitch( false )
 	SetShouldUseRoundWinningKillReplay( true )
 	Riff_ForceTitanAvailability( eTitanAvailability.Never )
 	Riff_ForceBoostAvailability( eBoostAvailability.Disabled )

Northstar.CustomServers/mod.json

@@ -49,6 +49,11 @@
 			"Name": "ns_progression_enabled",
 			"DefaultValue": "0",
 			"Flags": "ARCHIVE_PLAYERPROFILE"
+		},
+		{
+			"Name": "ns_allow_team_change",
+			"DefaultValue": "1",
+			"Flags": "REPLICATED"
 		}
 	],
 	"Scripts": [

Northstar.CustomServers/mod/scripts/vscripts/mp/_base_gametype_mp.gnut

@@ -18,6 +18,7 @@ global function TrackTitanDamageInPlayerGameStat
 global function ShouldEntTakeDamage_SPMP
 global function GetTitanBuildTime
 global function TitanPlayerHotDropsIntoLevel
+global function SetGamemodeAllowsTeamSwitch
 
 global function SetRecalculateRespawnAsTitanStartPointCallback
 
@@ -30,10 +31,13 @@ struct {
 	array<entity> specCams 
 
 	entity functionref( entity player, entity basePoint ) recalculateRespawnAsTitanStartPointCallback
+	table<entity, float> playerChangeTeamTimeBuffer
+	bool gamemodeTeamSwitchEnabled = true
 } file
 
 void function BaseGametype_Init_MPSP()
 {
+	AddClientCommandCallback( "changeteam", ClientCommandCallbackChangeTeam )
 	AddSpawnCallback( "info_intermission", SetIntermissionCamera )
 
 	AddPostDamageCallback( "player", AddToTitanDamageStat )
@@ -630,6 +634,51 @@ void function SetRecalculateRespawnAsTitanStartPointCallback( entity functionref
 	file.recalculateRespawnAsTitanStartPointCallback = callbackFunc
 }
 
+void function SetGamemodeAllowsTeamSwitch( bool enabled )
+{
+	file.gamemodeTeamSwitchEnabled = enabled
+}
+
+bool function ClientCommandCallbackChangeTeam( entity player, array<string> args )
+{
+	if ( !GetConVarBool( "ns_allow_team_change" ) || IsPrivateMatchSpectator( player ) )
+		return true
+
+	if ( !file.gamemodeTeamSwitchEnabled )
+	{
+		SendHudMessage( player, "#TEAMSWITCH_GAMEMODE", -1, 0.4, 255, 255, 255, 255, 0.15, 3.0, 0.5 )
+		return true
+	}
+
+	if ( !( player in file.playerChangeTeamTimeBuffer ) )
+	{
+		file.playerChangeTeamTimeBuffer[ player ] <- Time() + 5.0
+	}
+	else
+	{
+		if ( file.playerChangeTeamTimeBuffer[ player ] > Time() )
+		{
+			SendHudMessage( player, "#TEAMSWITCH_BUFFER", -1, 0.4, 255, 255, 255, 255, 0.15, 3.0, 0.5 )
+			return true
+		}
+	}
+
+	if ( player in file.playerChangeTeamTimeBuffer && file.playerChangeTeamTimeBuffer[ player ] < Time() )
+		file.playerChangeTeamTimeBuffer[ player ] = Time() + 5.0
+
+	if ( !GamePlaying() )
+	{
+		SendHudMessage( player, "#TEAMSWITCH_GAMEPLAY", -1, 0.4, 255, 255, 255, 255, 0.15, 3.0, 0.5 )
+		return true
+	}
+	if ( GetCurrentPlaylistVarInt( "max_teams", 0 ) > 1 && !IsFFAGame() )
+		SetTeam( player, GetOtherTeam( player.GetTeam() ) )
+	else
+		SendHudMessage( player, "#TEAMSWITCH_DISABLED", -1, 0.4, 255, 255, 255, 255, 0.15, 3.0, 0.5 )
+
+	return true
+}
+
 // stuff to change later
 
 bool function ShouldEntTakeDamage_SPMP( entity ent, var damageInfo )