fix uninitialized variables, add browser timeout

leaderboard.lua

@@ -55,6 +55,7 @@ local clearcheats = false
 
 local START_TIME = 6 * TICRATE + (3 * TICRATE / 4) + 1
 local AFK_TIMEOUT = TICRATE * 5
+local AFK_BROWSER = TICRATE * 15
 local AFK_BALANCE = TICRATE * 60
 local AFK_BALANCE_WARN = AFK_BALANCE - TICRATE * 10
 local PREVENT_JOIN_TIME = START_TIME + TICRATE * 5
@@ -407,18 +408,16 @@ local function initBrowser(player)
 		CONS_Printf(player, "Please exit battle first")
 		return
 	end
-	if not DrawBrowser then
-		DrawBrowser = rawget(_G, "DrawBrowser")
-		if not DrawBrowser then
-			print("Browser is not loaded")
-			return
-		end
 
-		BrowserController = rawget(_G, "BrowserController")
+	if not rawget(_G, "DrawBrowser") then
+		print("Browser is not loaded")
+		return
 	end
 
 	rawget(_G, "InitBrowser")(lb)
 	drawState = DS_BROWSER
+
+	player.afkTime = leveltime
 end
 COM_AddCommand("levelselect", initBrowser)
 
@@ -1144,6 +1143,9 @@ local function drawScrollTo(v, player, scoreTable, gui)
 end
 
 local function drawBrowser(v, player)
+	if not DrawBrowser then
+		DrawBrowser = rawget(_G, "DrawBrowser")
+	end
 	DrawBrowser(v, lb)
 end
 
@@ -1364,7 +1366,7 @@ local function think()
 			if not singleplayer() then
 				for p in players.iterate do
 					if p.valid and not p.spectator and not p.exiting and p.lives > 0 then
-						if p.cmd.buttons then
+						if p.cmd.buttons or p.cmd.driftturn then
 							p.afkTime = leveltime
 						end
 
@@ -1490,6 +1492,9 @@ local function think()
 				end
 			end
 		elseif drawState == DS_BROWSER then
+			if not BrowserController then
+				BrowserController = rawget(_G, "BrowserController")
+			end
 			if BrowserController(p) then
 				drawState = DS_DEFAULT
 			end
@@ -1505,11 +1510,17 @@ local function think()
 				p.pflags = $ & !(PF_TIMEOVER)
 				p.exiting = 100
 			end
+
+			-- prevent softlocking the server
+			if p.afkTime + AFK_BROWSER < leveltime then
+				drawState = DS_DEFAULT
+				S_StartSound(nil, 100)
+			end
 		elseif p.lives == 0 then
 			drawState = DS_SCROLL
 		end
 
-		if p.cmd.buttons then
+		if p.cmd.buttons or p.cmd.driftturn then
 			p.afkTime = leveltime
 		end