Generalized pulling restrictions to mob level.

code/modules/mob/living/carbon/alien/diona/diona.dm

@@ -9,6 +9,10 @@
 	death_msg = "expires with a pitiful chirrup..."
 	universal_understand = 1
 	universal_speak = 0      // Dionaea do not need to speak to people other than other dionaea.
+
+	can_pull_size = 2
+	can_pull_mobs = MOB_PULL_SMALLER
+
 	holder_type = /obj/item/weapon/holder/diona
 	var/obj/item/hat
 
@@ -18,19 +22,6 @@
 	species = all_species["Diona"]
 	verbs += /mob/living/carbon/alien/diona/proc/merge
 
-/mob/living/carbon/alien/diona/start_pulling(var/atom/movable/AM)
-	//TODO: Collapse these checks into one proc (see pai and drone)
-	if(istype(AM,/obj/item))
-		var/obj/item/O = AM
-		if(O.w_class > 2)
-			src << "<span class='warning'>You are too small to pull that.</span>"
-			return
-		else
-			..()
-	else
-		src << "<span class='warning'>You are too small to pull that.</span>"
-		return
-
 /mob/living/carbon/alien/diona/put_in_hands(var/obj/item/W) // No hands.
 	W.loc = get_turf(src)
 	return 1

code/modules/mob/living/silicon/pai/pai.dm

@@ -393,18 +393,6 @@
 	resting = 0
 	icon_state = "[chassis]"
 
-/mob/living/silicon/pai/start_pulling(var/atom/movable/AM)
-
-	if(istype(AM,/obj/item))
-		var/obj/item/O = AM
-		if(O.w_class == 1)
-			..()
-		else
-			src << "<span class='warning'>You are too small to pull that.</span>"
-	else
-		src << "<span class='warning'>You are too small to pull that.</span>"
-		return
-
 // No binary for pAIs.
 /mob/living/silicon/pai/binarycheck()
 	return 0

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

@@ -37,6 +37,9 @@ var/list/mob_hat_cache = list()
 	integrated_light_power = 3
 	local_transmit = 1
 
+	can_pull_size = 3
+	can_pull_mobs = MOB_PULL_SMALLER
+
 	mob_bump_flag = SIMPLE_ANIMAL
 	mob_swap_flags = SIMPLE_ANIMAL
 	mob_push_flags = SIMPLE_ANIMAL
@@ -49,8 +52,6 @@ var/list/mob_hat_cache = list()
 	var/obj/machinery/drone_fabricator/master_fabricator
 	var/law_type = /datum/ai_laws/drone
 	var/module_type = /obj/item/weapon/robot_module/drone
-	var/can_pull_size = 2
-	var/can_pull_mobs
 	var/obj/item/hat
 	var/hat_x_offset = 0
 	var/hat_y_offset = -13
@@ -66,10 +67,10 @@ var/list/mob_hat_cache = list()
 	icon_state = "constructiondrone"
 	law_type = /datum/ai_laws/construction_drone
 	module_type = /obj/item/weapon/robot_module/drone/construction
-	can_pull_size = 5
-	can_pull_mobs = 1
 	hat_x_offset = 1
 	hat_y_offset = -12
+	can_pull_size = 5
+	can_pull_mobs = MOB_PULL_SAME
 
 /mob/living/silicon/robot/drone/New()
 
@@ -315,20 +316,6 @@ var/list/mob_hat_cache = list()
 	src << "Remember,  you are <b>lawed against interference with the crew</b>. Also remember, <b>you DO NOT take orders from the AI.</b>"
 	src << "Use <b>say ;Hello</b> to talk to other drones and <b>say Hello</b> to speak silently to your nearby fellows."
 
-/mob/living/silicon/robot/drone/start_pulling(var/atom/movable/AM)
-
-	if(!(istype(AM,/obj/item/pipe) || istype(AM,/obj/structure/disposalconstruct)))
-		if(istype(AM,/obj/item))
-			var/obj/item/O = AM
-			if(O.w_class > can_pull_size)
-				src << "<span class='warning'>You are too small to pull that.</span>"
-				return
-		else
-			if(!can_pull_mobs)
-				src << "<span class='warning'>You are too small to pull that.</span>"
-				return
-	..()
-
 /mob/living/silicon/robot/drone/add_robot_verbs()
 	src.verbs |= silicon_subsystems
 

code/modules/mob/living/simple_animal/friendly/mouse.dm

@@ -31,6 +31,9 @@
 	holder_type = /obj/item/weapon/holder/mouse
 	mob_size = MOB_MINISCULE
 
+	can_pull_size = 1
+	can_pull_mobs = MOB_PULL_NONE
+
 /mob/living/simple_animal/mouse/Life()
 	..()
 	if(!stat && prob(speak_chance))
@@ -78,6 +81,7 @@
 	if(client)
 		client.time_died_as_mouse = world.time
 
+
 /mob/living/simple_animal/mouse/Crossed(AM as mob|obj)
 	if( ishuman(AM) )
 		if(!stat)

code/modules/mob/mob.dm

@@ -603,19 +603,28 @@
 			pullin.icon_state = "pull0"
 
 /mob/proc/start_pulling(var/atom/movable/AM)
+
 	if ( !AM || !usr || src==AM || !isturf(src.loc) )	//if there's no person pulling OR the person is pulling themself OR the object being pulled is inside something: abort!
 		return
 
 	if (AM.anchored)
-		usr << "<span class='notice'>It won't budge!</span>"
+		src << "<span class='warning'>It won't budge!</span>"
 		return
 
 	var/mob/M = AM
 	if(ismob(AM))
+		if(!can_pull_mobs || can_pull_mobs == MOB_PULL_NONE || (mob_size >= M.mob_size && can_pull_mobs == MOB_PULL_SMALLER) || (mob_size < M.mob_size && can_pull_mobs != MOB_PULL_LARGER))
+			src << "<span class='warning'>It won't budge!</span>"
+			return
 		if(!iscarbon(src))
 			M.LAssailant = null
 		else
 			M.LAssailant = usr
+	else if(isobj(AM))
+		var/obj/I = AM
+		if(!can_pull_size || can_pull_size < I.w_class)
+			src << "<span class='warning'>It won't budge!</span>"
+			return
 
 	if(pulling)
 		var/pulling_old = pulling

code/modules/mob/mob_defines.dm

@@ -149,6 +149,8 @@
 	var/const/deafness = 2//Carbon
 	var/const/muteness = 4//Carbon
 
+	var/can_pull_size = 10              // Maximum w_class the mob can pull.
+	var/can_pull_mobs = MOB_PULL_LARGER // Whether or not the mob can pull other mobs.
 
 	var/datum/dna/dna = null//Carbon
 	var/radiation = 0.0//Carbon