pAI and Held Mob Locations (#510)

Fixes #489

code/game/objects/items/devices/PDA/PDA.dm

@@ -1198,6 +1198,7 @@ var/global/list/obj/item/device/pda/PDAs = list()
 		user.drop_item()
 		C.loc = src
 		pai = C
+		pai.update_location()//This notifies the pAI that they've been slotted into a PDA
 		user << "<span class='notice'>You slot \the [C] into [src].</span>"
 		nanomanager.update_uis(src) // update all UIs attached to src
 	else if(istype(C, /obj/item/weapon/pen))

code/game/objects/items/devices/paicard.dm

@@ -323,4 +323,24 @@
 	if(pai && pai.client && !pai.canmove)
 		var/rendered = "<span class='message'>[text]</span>"
 		pai.show_message(rendered, 2)
-	..()
+	..()
+
+/obj/item/device/paicard/dropped(mob/user)
+
+	///When an object is put into a container, drop fires twice.
+	//once with it on the floor, and then once in the container
+	//We only care about the second one
+	if (istype(loc, /obj/item/weapon/storage))	//The second drop reads the container its placed into as the location
+		update_location()
+
+
+/obj/item/device/paicard/equipped(var/mob/user, var/slot)
+	..()
+	update_location(slot)
+
+/obj/item/device/paicard/proc/update_location(var/slotnumber = null)
+	if (!slotnumber)
+		if (istype(loc, /mob))
+			slotnumber = get_equip_slot()
+
+	report_onmob_location(1, slotnumber, pai)