Standardize FAT

Conflicts:
	code/modules/client/preferences.dm
	code/modules/mob/living/carbon/human/life.dm
	code/modules/mob/living/silicon/robot/robot.dm
	code/modules/mob/living/simple_animal/constructs.dm
	code/modules/mob/mob.dm
	code/modules/mob/mob_grab.dm

code/modules/mob/mob.dm

@@ -185,6 +185,212 @@ var/list/slot_equipment_priority = list( \
 
 	return 0
 
+/mob/proc/check_for_open_slot(obj/item/W)
+	if(!istype(W)) return 0
+	var/openslot = 0
+	for(var/slot in slot_equipment_priority)
+		if(W.mob_check_equip(src, slot, 1) == 1)
+			openslot = 1
+			break
+	return openslot
+
+/obj/item/proc/mob_check_equip(M as mob, slot, disable_warning = 0)
+	if(!M) return 0
+	if(!slot) return 0
+	if(ishuman(M))
+		//START HUMAN
+		var/mob/living/carbon/human/H = M
+
+		switch(slot)
+			if(slot_l_hand)
+				if(H.l_hand)
+					return 0
+				return 1
+			if(slot_r_hand)
+				if(H.r_hand)
+					return 0
+				return 1
+			if(slot_wear_mask)
+				if( !(slot_flags & SLOT_MASK) )
+					return 0
+				if(H.wear_mask)
+					return 0
+				return 1
+			if(slot_back)
+				if( !(slot_flags & SLOT_BACK) )
+					return 0
+				if(H.back)
+					if(H.back.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_wear_suit)
+				if( !(slot_flags & SLOT_OCLOTHING) )
+					return 0
+				if(H.wear_suit)
+					if(H.wear_suit.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_gloves)
+				if( !(slot_flags & SLOT_GLOVES) )
+					return 0
+				if(H.gloves)
+					if(H.gloves.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_shoes)
+				if( !(slot_flags & SLOT_FEET) )
+					return 0
+				if(H.shoes)
+					if(H.shoes.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_belt)
+				if(!H.w_uniform)
+					if(!disable_warning)
+						H << "\red You need a jumpsuit before you can attach this [name]."
+					return 0
+				if( !(slot_flags & SLOT_BELT) )
+					return 0
+				if(H.belt)
+					if(H.belt.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_glasses)
+				if( !(slot_flags & SLOT_EYES) )
+					return 0
+				if(H.glasses)
+					if(H.glasses.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_head)
+				if( !(slot_flags & SLOT_HEAD) )
+					return 0
+				if(H.head)
+					if(H.head.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_l_ear)
+				if( !(slot_flags & slot_l_ear) )
+					return 0
+				if(H.l_ear)
+					if(H.l_ear.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_r_ear)
+				if( !(slot_flags & slot_r_ear) )
+					return 0
+				if(H.r_ear)
+					if(H.r_ear.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_w_uniform)
+				if( !(slot_flags & SLOT_ICLOTHING) )
+					return 0
+				if((M_FAT in H.mutations) && !(flags & ONESIZEFITSALL))
+					return 0
+				if(H.w_uniform)
+					if(H.w_uniform.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_wear_id)
+				if(!H.w_uniform)
+					if(!disable_warning)
+						H << "\red You need a jumpsuit before you can attach this [name]."
+					return 0
+				if( !(slot_flags & SLOT_ID) )
+					return 0
+				if(H.wear_id)
+					if(H.wear_id.canremove)
+						return 2
+					else
+						return 0
+				return 1
+			if(slot_l_store)
+				if(H.l_store)
+					return 0
+				if(!H.w_uniform)
+					if(!disable_warning)
+						H << "\red You need a jumpsuit before you can attach this [name]."
+					return 0
+				if(slot_flags & SLOT_DENYPOCKET)
+					return
+				if( w_class <= 2 || (slot_flags & SLOT_POCKET) )
+					return 1
+			if(slot_r_store)
+				if(H.r_store)
+					return 0
+				if(!H.w_uniform)
+					if(!disable_warning)
+						H << "\red You need a jumpsuit before you can attach this [name]."
+					return 0
+				if(slot_flags & SLOT_DENYPOCKET)
+					return 0
+				if( w_class <= 2 || (slot_flags & SLOT_POCKET) )
+					return 1
+				return 0
+			if(slot_s_store)
+				if(!H.wear_suit)
+					if(!disable_warning)
+						H << "\red You need a suit before you can attach this [name]."
+					return 0
+				if(!H.wear_suit.allowed)
+					if(!disable_warning)
+						usr << "You somehow have a suit with no defined allowed items for suit storage, stop that."
+					return 0
+				if(src.w_class > 3)
+					if(!disable_warning)
+						usr << "The [name] is too big to attach."
+					return 0
+				if( istype(src, /obj/item/device/pda) || istype(src, /obj/item/weapon/pen) || is_type_in_list(src, H.wear_suit.allowed) )
+					if(H.s_store)
+						if(H.s_store.canremove)
+							return 2
+						else
+							return 0
+					else
+						return 1
+				return 0
+			if(slot_handcuffed)
+				if(H.handcuffed)
+					return 0
+				if(!istype(src, /obj/item/weapon/handcuffs))
+					return 0
+				return 1
+			if(slot_legcuffed)
+				if(H.legcuffed)
+					return 0
+				if(!istype(src, /obj/item/weapon/legcuffs))
+					return 0
+				return 1
+			if(slot_in_backpack)
+				if (H.back && istype(H.back, /obj/item/weapon/storage/backpack))
+					var/obj/item/weapon/storage/backpack/B = H.back
+					if(B.contents.len < B.storage_slots && w_class <= B.max_w_class)
+						return 1
+				return 0
+		return 0 //Unsupported slot
+		//END HUMAN
+
 /mob/proc/reset_view(atom/A)
 	if (client)
 		if (istype(A, /atom/movable))