From 636b0f20df4fef3eef821c23ccc2f606828f5c6f Mon Sep 17 00:00:00 2001
From: Zefram <zefram@fysh.org>
Date: Mon, 07 Jul 2014 15:15:05 +0200
Subject: [PATCH] Handheld prospecting tool

---
 technic/tools/sonic_screwdriver.lua |  110 +++++++++++++++++++++++++++++++------------------------
 1 files changed, 62 insertions(+), 48 deletions(-)

diff --git a/technic/tools/sonic_screwdriver.lua b/technic/tools/sonic_screwdriver.lua
index a290c94..0a9b3a9 100644
--- a/technic/tools/sonic_screwdriver.lua
+++ b/technic/tools/sonic_screwdriver.lua
@@ -1,53 +1,66 @@
-local sonic_screwdriver_max_charge=15000
-technic.register_power_tool ("technic:sonic_screwdriver",sonic_screwdriver_max_charge)
+local sonic_screwdriver_max_charge = 15000
+
+local S = technic.getter
+
+technic.register_power_tool("technic:sonic_screwdriver", sonic_screwdriver_max_charge)
 
 minetest.register_tool("technic:sonic_screwdriver", {
-			description = "Sonic Screwdriver",
-			inventory_image = "technic_sonic_screwdriver.png",
-			on_use = function(itemstack, user, pointed_thing)
-					-- Must be pointing to facedir applicable node
-					if pointed_thing.type~="node" then return end
-					local pos=minetest.get_pointed_thing_position(pointed_thing,above)
-					local node=minetest.env:get_node(pos)
-					local node_name=node.name
-						if minetest.registered_nodes[node_name].paramtype2 == "facedir" or minetest.registered_nodes[node_name].paramtype2 == "wallmounted" then
-					if node.param2==nil  then return end
-					item=itemstack:to_table()
-					local meta1=get_item_meta(item["metadata"])
-					if meta1==nil then return end --tool not charghed
-					if meta1["charge"]==nil then return end
-					charge=meta1["charge"]
-					if charge-100>0 then
-						minetest.sound_play("technic_sonic_screwdriver", {pos = pos, gain = 0.3, max_hear_distance = 10,})
-						local n = node.param2
-						if minetest.registered_nodes[node_name].paramtype2 == "facedir" then
-						   n = n+1
-						if n == 4 then n = 0 end
-						else
-							n = n+1
-							if n == 6 then n = 0 end
-						end
-						-- hacky_swap_node, unforunatly.
-						local meta = minetest.env:get_meta(pos)
-						local meta0 = meta:to_table()
-						node.param2 = n
-						minetest.env:set_node(pos,node)
-						meta = minetest.env:get_meta(pos)
-						meta:from_table(meta0)
+	description = S("Sonic Screwdriver"),
+	inventory_image = "technic_sonic_screwdriver.png",
+	wear_represents = "technic_RE_charge",
+	on_refill = technic.refill_RE_charge,
+	on_use = function(itemstack, user, pointed_thing)
+		-- Must be pointing to facedir applicable node
+		if pointed_thing.type ~= "node" then
+			return
+		end
+		local pos = pointed_thing.under
+		if minetest.is_protected(pos, user:get_player_name()) then
+			minetest.record_protection_violation(pos, user:get_player_name())
+			return
+		end
+		local node = minetest.get_node(pos)
+		local node_name = node.name
+		if minetest.registered_nodes[node_name].paramtype2 ~= "facedir" and
+		   minetest.registered_nodes[node_name].paramtype2 ~= "wallmounted" then
+			return
+		end
+		if node.param2 == nil then
+			return
+		end
+		local meta1 = minetest.deserialize(itemstack:get_metadata())
+		if not meta1 or not meta1.charge then
+			return
+		end
+		if meta1.charge >= 100 then
+			minetest.sound_play("technic_sonic_screwdriver",
+					{pos = pos, gain = 0.3, max_hear_distance = 10})
+			local p = node.param2
+			if minetest.registered_nodes[node_name].paramtype2 == "facedir" then
+				p = p + 1
+				if p == 4 then
+					p = 0
+				end
+			else
+				p = p + 1
+				if p == 6 then
+					p = 0
+				end
+			end
+			if minetest.is_protected(pos, user:get_player_name()) then
+				minetest.record_protection_violation(pos, user:get_player_name())
+			else
+				node.param2 = p
+				minetest.swap_node(pos, node)
 
-						charge=charge-100;  
-						meta1["charge"]=charge
-						item["metadata"]=set_item_meta(meta1)
-						technic.set_RE_wear(item,charge,sonic_screwdriver_max_charge)
-						itemstack:replace(item)
-						end
-						return itemstack
-						else
-						return itemstack
-						end
-						end,
-		 
-	})
+				meta1.charge = meta1.charge - 100
+				itemstack:set_metadata(minetest.serialize(meta1))
+				technic.set_RE_wear(itemstack, meta1.charge, sonic_screwdriver_max_charge)
+			end
+		end
+		return itemstack
+	end, 
+})
  
 minetest.register_craft({
 	output = "technic:sonic_screwdriver",
@@ -55,5 +68,6 @@
 		{"default:diamond"},
 		{"technic:battery"},
 		{"technic:stainless_steel_ingot"}
-		}
+	}
 })
+

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