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 |   36 +++++++++++++++++++++---------------
 1 files changed, 21 insertions(+), 15 deletions(-)

diff --git a/technic/tools/sonic_screwdriver.lua b/technic/tools/sonic_screwdriver.lua
index 7bd26fd..0a9b3a9 100644
--- a/technic/tools/sonic_screwdriver.lua
+++ b/technic/tools/sonic_screwdriver.lua
@@ -7,26 +7,32 @@
 minetest.register_tool("technic:sonic_screwdriver", {
 	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 = minetest.get_pointed_thing_position(pointed_thing, above)
+		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 itemstack
+			return
 		end
 		if node.param2 == nil then
 			return
 		end
-		local meta1 = get_item_meta(itemstack:get_metadata())
+		local meta1 = minetest.deserialize(itemstack:get_metadata())
 		if not meta1 or not meta1.charge then
 			return
 		end
-		if meta1.charge - 100 > 0 then
+		if meta1.charge >= 100 then
 			minetest.sound_play("technic_sonic_screwdriver",
 					{pos = pos, gain = 0.3, max_hear_distance = 10})
 			local p = node.param2
@@ -41,17 +47,16 @@
 					p = 0
 				end
 			end
-			-- hacky_swap_node, unforunatly.
-			local meta = minetest.get_meta(pos)
-			local meta0 = meta:to_table()
-			node.param2 = p
-			minetest.set_node(pos, node)
-			meta = minetest.get_meta(pos)
-			meta:from_table(meta0)
+			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)
 
-			meta1.charge = meta1.charge - 100  
-			itemstack:set_metadata(set_item_meta(meta1))
-			technic.set_RE_wear(itemstack, meta1.charge, sonic_screwdriver_max_charge)
+				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, 
@@ -63,5 +68,6 @@
 		{"default:diamond"},
 		{"technic:battery"},
 		{"technic:stainless_steel_ingot"}
-		}
+	}
 })
+

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