Modified Service Bot's Tray to actually be useful

Service Borg's tray now can load and unload items.

code/modules/mob/living/silicon/robot/robot_items.dm

@@ -0,0 +1,79 @@
+// A special tray for the service droid. Allow droid to pick up and drop items as if they were using the tray normally
+// Click on table to unload, click on item to load. Otherwise works identically to a tray.
+
+/obj/item/weapon/tray/robotray
+	name = "RoboTray"
+	desc = "An autoloading tray specilized made for carrying refreshments."
+
+/obj/item/weapon/tray/robotray/afterattack(atom/target, mob/user as mob)
+	if ( !target )
+		return
+	if ( istype(target,/obj/item)) //pick up items, mostly copied from base tray pickup
+		if ( !isturf(target.loc) ) // Don't load up stuff if it's inside a container or mob!
+			return
+		var turf/pickup = target.loc
+
+		var addedSomething = 0
+
+		for(var/obj/item/I in pickup)
+			if( I != src && !I.anchored && !istype(I, /obj/item/clothing/under) && !istype(I, /obj/item/clothing/suit) && !istype(I, /obj/item/projectile) )
+				var/add = 0
+				if(I.w_class == 1.0)
+					add = 1
+				else if(I.w_class == 2.0)
+					add = 3
+				else
+					add = 5
+				if(calc_carry() + add >= max_carry)
+					break
+
+				I.loc = src
+				carrying.Add(I)
+				overlays += image("icon" = I.icon, "icon_state" = I.icon_state, "layer" = 30 + I.layer)
+				addedSomething = 1
+		if ( addedSomething )
+			user.visible_message("\blue [user] load some items onto their service tray.")
+
+		return
+
+
+	if ( isturf(target) || istype(target,/obj/structure/table) ) // Unload the tray!
+		var foundtable = istype(target,/obj/structure/table/)
+		if ( !foundtable ) //it must be a turf!
+			for(var/obj/structure/table/T in target)
+				foundtable = 1
+				break
+
+		var turf/dropspot
+		if ( !foundtable ) // don't unload things onto walls or other silly places.
+			dropspot = user.loc
+		else if ( isturf(target) ) // they clicked on a turf with a table in it
+			dropspot = target
+		else					// they clicked on a table
+			dropspot = target.loc
+
+
+		overlays = null
+
+		var droppedSomething = 0
+
+		for(var/obj/item/I in carrying)
+			I.loc = dropspot
+			carrying.Remove(I)
+			droppedSomething = 1
+			if(!foundtable && isturf(dropspot))
+				// if no table, presume that the person just shittily dropped the tray on the ground and made a mess everywhere!
+				spawn()
+					for(var/i = 1, i <= rand(1,2), i++)
+						if(I)
+							step(I, pick(NORTH,SOUTH,EAST,WEST))
+							sleep(rand(2,4))
+		if ( droppedSomething )
+			if ( foundtable )
+				user.visible_message("\blue [user] unloads their service tray.")
+			else
+				user.visible_message("\blue [user] drops all the items on their tray.")
+
+	return ..()
+
+

code/modules/mob/living/silicon/robot/robot_modules.dm

@@ -182,7 +182,7 @@
 		L.lit = 1
 		src.modules += L
 
-		src.modules += new /obj/item/weapon/tray(src)
+		src.modules += new /obj/item/weapon/tray/robotray(src)
 		src.modules += new /obj/item/weapon/reagent_containers/food/drinks/shaker(src)
 		src.emag = new /obj/item/weapon/reagent_containers/food/drinks/beer(src)