sounds & safety

- adds a click cooldown so you can't spam tons of noise
- doesn't flick the deny animation unless the door is closed and powered
- alt-clicking on an unpowered door knocks rather than buzzing
- adds a knocking sound for wood (from freesound)

code/game/machinery/doors/airlock.dm

@@ -57,6 +57,7 @@
 	var/bolt_down_sound = 'sound/machines/door/boltsdown.ogg'
 	var/knock_sound = 'sound/machines/2beeplow.ogg'
 	var/knock_hammer_sound = 'sound/weapons/sonic_jackhammer.ogg'
+	var/knock_unpowered_sound = 'sound/machines/door/knock_glass.ogg'
 
 /obj/machinery/door/airlock/attack_generic(var/mob/living/user, var/damage)
 	if(stat & (BROKEN|NOPOWER))
@@ -978,18 +979,25 @@ About the new airlock wires panel:
 	return
 
 /obj/machinery/door/airlock/AltClick(mob/user as mob)
+	user.setClickCooldown(DEFAULT_ATTACK_COOLDOWN)
 	if(!Adjacent(user))
 		return
 	else if(user.a_intent == I_HURT)
 		src.visible_message("<span class='warning'>[user] hammers on \the [src]!</span>", "<span class='warning'>Someone hammers loudly on \the [src]!</span>")
 		src.add_fingerprint(user)
-		flick("door_deny", src)
+		if(icon_state == "door_closed" && arePowerSystemsOn())
+			flick("door_deny", src)
 		playsound(src, knock_hammer_sound, 50, 0, 3)
-	else
+	else if(arePowerSystemsOn())
 		src.visible_message("[user] presses the door bell on \the [src].", "\The [src]'s bell rings.")
 		src.add_fingerprint(user)
-		flick("door_deny", src)
+		if(icon_state == "door_closed")
+			flick("door_deny", src)
 		playsound(src, knock_sound, 50, 0, 3)
+	else
+		src.visible_message("[user] knocks on \the [src].", "Someone knocks on \the [src].")
+		src.add_fingerprint(user)
+		playsound(src, knock_unpowered_sound, 50, 0, 3)
 	return
 
 /obj/machinery/door/airlock/tgui_act(action, params)

code/game/objects/structures/simple_doors.dm

@@ -12,7 +12,7 @@
 	var/isSwitchingStates = 0
 	var/hardness = 1
 	var/oreAmount = 7
-	var/knock_sound = 'sound/effects/glassknock.ogg'
+	var/knock_sound = 'sound/machines/door/knock_glass.ogg'
 	var/knock_hammer_sound = 'sound/weapons/sonic_jackhammer.ogg'
 	
 /obj/structure/simple_door/fire_act(datum/gas_mixture/air, exposed_temperature, exposed_volume)
@@ -71,6 +71,7 @@
 	return TryToSwitchState(user)
 
 /obj/structure/simple_door/AltClick(mob/user as mob)
+	user.setClickCooldown(DEFAULT_ATTACK_COOLDOWN)
 	if(!Adjacent(user))
 		return
 	else if(user.a_intent == I_HURT)
@@ -240,6 +241,7 @@
 
 /obj/structure/simple_door/wood/Initialize(mapload,var/material_name)
 	..(mapload, material_name || MAT_WOOD)
+	knock_sound = 'sound/machines/door/knock_wood.wav'
 
 /obj/structure/simple_door/sifwood/Initialize(mapload,var/material_name)
 	..(mapload, material_name || MAT_SIFWOOD)