Interaction/Attack Hand Refactor (#36405)

code/game/objects/structures.dm

@@ -2,6 +2,7 @@
 	icon = 'icons/obj/structures.dmi'
 	pressure_resistance = 8
 	max_integrity = 300
+	interaction_flags_atom = INTERACT_ATOM_ATTACK_HAND | INTERACT_ATOM_UI_INTERACT
 	var/climb_time = 20
 	var/climb_stun = 20
 	var/climbable = FALSE
@@ -26,16 +27,13 @@
 
 /obj/structure/attack_hand(mob/user)
 	. = ..()
-	add_fingerprint(user)
+	if(.)
+		return
 	if(structureclimber && structureclimber != user)
 		user.changeNext_move(CLICK_CD_MELEE)
 		user.do_attack_animation(src)
 		structureclimber.Knockdown(40)
 		structureclimber.visible_message("<span class='warning'>[structureclimber] has been knocked off [src].", "You're knocked off [src]!", "You see [structureclimber] get knocked off [src].</span>")
-	interact(user)
-
-/obj/structure/interact(mob/user)
-	ui_interact(user)
 
 /obj/structure/ui_act(action, params)
 	..()
@@ -49,15 +47,14 @@
 		if(user.canmove)
 			climb_structure(user)
 			return
-	if ((!( istype(O, /obj/item) ) || user.get_active_held_item() != O))
+	if(!istype(O, /obj/item) || user.get_active_held_item() != O)
 		return
 	if(iscyborg(user))
 		return
-	if(!user.drop_all_held_items())
+	if(!user.dropItemToGround(O))
 		return
 	if (O.loc != src.loc)
 		step(O, get_dir(O, src))
-	return
 
 /obj/structure/proc/do_climb(atom/movable/A)
 	if(climbable)