Material door updates: lock and damage (#5659)

-ported locks and keys from baystation
-fixed the simple door damage interaction, now you can properly destroy it and etc

code/modules/lock/lock.dm

@@ -0,0 +1,81 @@
+#define LOCK_LOCKED 1
+#define LOCK_BROKEN 2
+
+
+/datum/lock
+	var/status = 1 //unlocked, 1 == locked 2 == broken
+	var/lock_data = "" //basically a randomized string. The longer the string the more complex the lock.
+	var/atom/holder
+
+/datum/lock/New(var/atom/h, var/complexity = 1)
+	holder = h
+	if(istext(complexity))
+		lock_data = complexity
+	else
+		lock_data = generateRandomString(complexity)
+
+/datum/lock/Destroy()
+	holder = null
+	..()
+
+/datum/lock/proc/unlock(var/key = "", var/mob/user)
+	if(status ^ LOCK_LOCKED)
+		to_chat(user, "<span class='warning'>Its already unlocked!</span>")
+		return 2
+	key = get_key_data(key, user)
+	if(cmptext(lock_data,key) && (status ^ LOCK_BROKEN))
+		to_chat(user, "<span class='warning'>You unlock the lock.</span>")
+		status &= ~LOCK_LOCKED
+		return 1
+	return 0
+
+/datum/lock/proc/lock(var/key = "", var/mob/user)
+	if(status & LOCK_LOCKED)
+		to_chat(user, "<span class='warning'>Its already locked!</span>")
+		return 2
+	key = get_key_data(key, user)
+	if(cmptext(lock_data,key) && (status ^ LOCK_BROKEN))
+		to_chat(user, "<span class='warning'>You close the lock.</span>")
+		status |= LOCK_LOCKED
+		return 1
+	return 0
+
+/datum/lock/proc/toggle(var/key = "", var/mob/user)
+	if(status & LOCK_LOCKED)
+		return unlock(key, user)
+	else
+		return lock(key, user)
+
+/datum/lock/proc/getComplexity()
+	return length(lock_data)
+
+/datum/lock/proc/get_key_data(var/key = "", var/mob/user)
+	if(istype(key,/obj/item/weapon/key))
+		var/obj/item/weapon/key/K = key
+		return K.get_data(user)
+	if(istext(key))
+		return key
+	return null
+
+/datum/lock/proc/isLocked()
+	return status & LOCK_LOCKED
+
+/datum/lock/proc/pick_lock(var/obj/item/I, var/mob/user)
+	if(!istype(I) || (status ^ LOCK_LOCKED))
+		return 0
+	var/unlock_power = I.lock_picking_level
+	if(!unlock_power)
+		return 0
+	user.visible_message("\The [user] takes out \the [I], picking \the [holder]'s lock.")
+	if(!do_after(user, 20, holder))
+		return 0
+	if(prob(20*(unlock_power/getComplexity())))
+		to_chat(user, "<span class='notice'>You pick open \the [holder]'s lock!</span>")
+		unlock(lock_data)
+		return 1
+	else if(prob(5 * unlock_power))
+		to_chat(user, "<span class='warning'>You accidently break \the [holder]'s lock with \the [I]!</span>")
+		status |= LOCK_BROKEN
+	else
+		to_chat(user, "<span class='warning'>You fail to pick open \the [holder].</span>")
+	return 0