Adds can shaking (#18755)

* Shake shake

* Un-shake the shaken

* boom

code/modules/food/food/cans.dm

@@ -5,6 +5,39 @@
 	drop_sound = 'sound/items/drop/soda.ogg'
 	pickup_sound = 'sound/items/pickup/soda.ogg'
 	cant_chance = 1 //arbitrarily high for april fools; if it's not reverted in its entirety I suggest rolling it down to 2% or something
+	var/shaken = 0 // How many times this can has been shaken.
+
+/obj/item/reagent_containers/food/drinks/cans/attack_self(mob/user)
+	if(user.a_intent == I_HURT && !is_open_container())
+		to_chat(user, span_warning("You shake [src]."))
+		if(!shaken)
+			START_PROCESSING(SSobj, src)
+		shaken += 3
+		return
+	if(HAS_TRAIT(user, TRAIT_UNLUCKY) && prob(10)) // Because it's always funny
+		shaken += 10
+	. = ..()
+
+/obj/item/reagent_containers/food/drinks/cans/open(mob/user)
+	. = ..()
+	if(!cant_open && shaken)
+		to_chat(user, span_warning("[src] [(shaken > 50) ? "explodes" : "foams"] when you open it!"))
+		var/obj/effect/effect/foam/foam = new /obj/effect/effect/foam(src.loc)
+		foam.amount = (shaken > 50) ? 2 : 1
+		reagents.splash(user, shaken/2)
+		reagents.trans_to(foam, shaken/2)
+		if(shaken > 50)
+			if(HAS_TRAIT(user, TRAIT_UNLUCKY) && prob(0.1))
+				explosion(get_turf(src), -1, -1, -1, 7)
+				user.gib()
+			else
+				explosion(get_turf(src), -1, -1, -1, 1)
+			qdel(src)
+
+/obj/item/reagent_containers/food/drinks/cans/process()
+	if(shaken <= 0)
+		return PROCESS_KILL
+	shaken--
 
 //DRINKS