Buffs arm implants (#19773)

* fuck it signal time

* heres a great example of simplifcation!

* fuck it sometimes you have to ball, fuck stoplag

* fuck yeah baby, mob signals instead

* bam good code

* add support for drop button

* lets not drop nulls

* sirryan review

code/modules/mob/inventory.dm

@@ -103,6 +103,7 @@
 
 /mob/proc/drop_item_v()		//this is dumb.
 	if(stat == CONSCIOUS && isturf(loc))
+		SEND_SIGNAL(usr, COMSIG_MOB_WILLINGLY_DROP)
 		return drop_item()
 	return 0
 
@@ -125,10 +126,10 @@
 
 /mob/proc/canUnEquip(obj/item/I, force)
 	if(!I)
-		return 1
+		return TRUE
 	if((I.flags & NODROP) && !force)
-		return 0
-	return 1
+		return FALSE
+	return TRUE
 
 /mob/proc/unEquip(obj/item/I, force, silent = FALSE) //Force overrides NODROP for things like wizarditis and admin undress.
 	if(!I) //If there's nothing to drop, the drop is automatically succesfull. If(unEquip) should generally be used to check for NODROP.

code/modules/mob/mob_defines.dm

@@ -44,6 +44,7 @@
 	var/memory = ""
 	var/next_move = null
 	var/notransform = FALSE	//Carbon
+	/// True for left hand active, otherwise for right hand active
 	var/hand = null
 	var/real_name = null
 	var/flavor_text = ""

code/modules/surgery/organs/augments_arms.dm

@@ -45,6 +45,9 @@
 	to_chat(user, "<span class='notice'>You modify [src] to be installed on the [parent_organ == "r_arm" ? "right" : "left"] arm.</span>")
 	update_icon(UPDATE_ICON_STATE)
 
+/obj/item/organ/internal/cyberimp/arm/insert(mob/living/carbon/M, special, dont_remove_slot)
+	. = ..()
+	RegisterSignal(M, COMSIG_MOB_WILLINGLY_DROP, PROC_REF(retract_to_linked_implant))
 
 /obj/item/organ/internal/cyberimp/arm/remove(mob/living/carbon/M, special = 0)
 	Retract()
@@ -62,6 +65,16 @@
 		Retract()
 	..()
 
+/obj/item/organ/internal/cyberimp/arm/proc/retract_to_linked_implant()
+	SIGNAL_HANDLER
+	if(holder && holder == owner.get_active_hand())
+		INVOKE_ASYNC(src, PROC_REF(retract_and_show_radial))
+
+/obj/item/organ/internal/cyberimp/arm/proc/retract_and_show_radial()
+	Retract()
+	if(length(items_list) != 1)
+		radial_menu(owner)
+
 /obj/item/organ/internal/cyberimp/arm/proc/check_cuffs()
 	if(owner.handcuffed)
 		to_chat(owner, "<span class='warning'>The handcuffs interfere with [src]!</span>")
@@ -253,7 +266,7 @@
 	..()
 	if(locate(/obj/item/flash/armimplant) in items_list)
 		var/obj/item/flash/armimplant/F = locate(/obj/item/flash/armimplant) in items_list
-		F.I = src
+		F.implant = src
 
 /obj/item/organ/internal/cyberimp/arm/baton
 	name = "arm electrification implant"
@@ -271,7 +284,7 @@
 	..()
 	if(locate(/obj/item/flash/armimplant) in items_list)
 		var/obj/item/flash/armimplant/F = locate(/obj/item/flash/armimplant) in items_list
-		F.I = src
+		F.implant = src
 
 /obj/item/organ/internal/cyberimp/arm/combat/centcom
 	name = "NT specops cybernetics implant"