[READY]integrated circuitry port+upgrade.

code/modules/integrated_electronics/core/wirer.dm

@@ -0,0 +1,102 @@
+#define WIRE		"wire"
+#define WIRING		"wiring"
+#define UNWIRE		"unwire"
+#define UNWIRING	"unwiring"
+
+/obj/item/device/integrated_electronics/wirer
+	name = "circuit wirer"
+	desc = "It's a small wiring tool, with a wire roll, electric soldering iron, wire cutter, and more in one package. \
+	The wires used are generally useful for small electronics, such as circuitboards and breadboards, as opposed to larger wires \
+	used for power or data transmission."
+	icon = 'icons/obj/electronic_assemblies.dmi'
+	icon_state = "wirer-wire"
+	flags_1 = CONDUCT_1
+	w_class = WEIGHT_CLASS_SMALL
+	var/datum/integrated_io/selected_io = null
+	var/mode = WIRE
+
+/obj/item/device/integrated_electronics/wirer/update_icon()
+	icon_state = "wirer-[mode]"
+
+/obj/item/device/integrated_electronics/wirer/proc/wire(var/datum/integrated_io/io, mob/user)
+	if(!io.holder.assembly)
+		to_chat(user, "<span class='warning'>\The [io.holder] needs to be secured inside an assembly first.</span>")
+		return
+	if(mode == WIRE)
+		selected_io = io
+		to_chat(user, "<span class='notice'>You attach a data wire to \the [selected_io.holder]'s [selected_io.name] data channel.</span>")
+		mode = WIRING
+		update_icon()
+	else if(mode == WIRING)
+		if(io == selected_io)
+			to_chat(user, "<span class='warning'>Wiring \the [selected_io.holder]'s [selected_io.name] into itself is rather pointless.</span>")
+			return
+		if(io.io_type != selected_io.io_type)
+			to_chat(user, "<span class='warning'>Those two types of channels are incompatable.  The first is a [selected_io.io_type], \
+			while the second is a [io.io_type].</span>")
+			return
+		if(io.holder.assembly && io.holder.assembly != selected_io.holder.assembly)
+			to_chat(user, "<span class='warning'>Both \the [io.holder] and \the [selected_io.holder] need to be inside the same assembly.</span>")
+			return
+		selected_io.linked |= io
+		io.linked |= selected_io
+
+		to_chat(user, "<span class='notice'>You connect \the [selected_io.holder]'s [selected_io.name] to \the [io.holder]'s [io.name].</span>")
+		mode = WIRE
+		update_icon()
+		selected_io.holder.interact(user) // This is to update the UI.
+		selected_io = null
+
+	else if(mode == UNWIRE)
+		selected_io = io
+		if(!io.linked.len)
+			to_chat(user, "<span class='warning'>There is nothing connected to \the [selected_io] data channel.</span>")
+			selected_io = null
+			return
+		to_chat(user, "<span class='notice'>You prepare to detach a data wire from \the [selected_io.holder]'s [selected_io.name] data channel.</span>")
+		mode = UNWIRING
+		update_icon()
+		return
+
+	else if(mode == UNWIRING)
+		if(io == selected_io)
+			to_chat(user, "<span class='warning'>You can't wire a pin into each other, so unwiring \the [selected_io.holder] from \
+			the same pin is rather moot.</span>")
+			return
+		if(selected_io in io.linked)
+			io.linked.Remove(selected_io)
+			selected_io.linked.Remove(io)
+			to_chat(user, "<span class='notice'>You disconnect \the [selected_io.holder]'s [selected_io.name] from \
+			\the [io.holder]'s [io.name].</span>")
+			selected_io.holder.interact(user) // This is to update the UI.
+			selected_io = null
+			mode = UNWIRE
+			update_icon()
+		else
+			to_chat(user, "<span class='warning'>\The [selected_io.holder]'s [selected_io.name] and \the [io.holder]'s \
+			[io.name] are not connected.</span>")
+			return
+
+/obj/item/device/integrated_electronics/wirer/attack_self(mob/user)
+	switch(mode)
+		if(WIRE)
+			mode = UNWIRE
+		if(WIRING)
+			if(selected_io)
+				to_chat(user, "<span class='notice'>You decide not to wire the data channel.</span>")
+			selected_io = null
+			mode = WIRE
+		if(UNWIRE)
+			mode = WIRE
+		if(UNWIRING)
+			if(selected_io)
+				to_chat(user, "<span class='notice'>You decide not to disconnect the data channel.</span>")
+			selected_io = null
+			mode = UNWIRE
+	update_icon()
+	to_chat(user, "<span class='notice'>You set \the [src] to [mode].</span>")
+
+#undef WIRE
+#undef WIRING
+#undef UNWIRE
+#undef UNWIRING