From 2ecdd6cb1dd05b5627cbee32b357cfc15594809b Mon Sep 17 00:00:00 2001
From: Anthony Zhang <azhang9@gmail.com>
Date: Thu, 19 Jul 2012 22:54:26 -0400
Subject: [PATCH] Re-add support for the old WorldEdit save format on a
 load-only basis. Implemented as worldedit.deserialize_old(), and documented
 in README.md. //load will now transparently detect these files and load them
 correctly.

---
 README.md     |  8 ++++++++
 functions.lua | 31 +++++++++++++++++++++++++++++++
 init.lua      | 10 ++++++----
 3 files changed, 45 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index ffe6852..8b17a37 100644
--- a/README.md
+++ b/README.md
@@ -179,6 +179,14 @@ Loads the nodes represented by string `value` at position `originpos`.
 
 Returns the number of nodes deserialized.
 
+### worldedit.deserialize_old(originpos, value)
+
+Loads the nodes represented by string `value` at position `originpos`, using the older table-based WorldEdit format.
+
+This function is deprecated, and should not be used unless there is a need to support legacy WorldEdit save files.
+
+Returns the number of nodes deserialized.
+
 License
 -------
 Copyright 2012 sfan5 and Anthony Zhang (Temperest)
diff --git a/functions.lua b/functions.lua
index b752b06..1e727db 100644
--- a/functions.lua
+++ b/functions.lua
@@ -246,4 +246,35 @@ worldedit.deserialize = function(originpos, value)
 		count = count + 1
 	end
 	return count
+end
+
+--loads the nodes represented by string `value` at position `originpos`, returning the number of nodes deserialized
+--based on [table.save/table.load](http://lua-users.org/wiki/SaveTableToFile) by ChillCode, available under the MIT license (GPL compatible)
+worldedit.deserialize_old = function(originpos, value)
+	--obtain the node table
+	local count = 0
+	local get_tables = loadstring(value)
+	if get_tables == nil then --error loading value
+		return count
+	end
+	local tables = get_tables()
+
+	--transform the node table into an array of nodes
+	for i = 1, #tables do
+		for j, v in pairs(tables[i]) do
+			if type(v) == "table" then
+				tables[i][j] = tables[v[1]]
+			end
+		end
+	end
+
+	--load the node array
+	local env = minetest.env
+	for i, v in ipairs(tables[1]) do
+		local pos = v[1]
+		pos.x, pos.y, pos.z = originpos.x + pos.x, originpos.y + pos.y, originpos.z + pos.z
+		env:add_node(pos, v[2])
+		count = count + 1
+	end
+	return count
 end
\ No newline at end of file
diff --git a/init.lua b/init.lua
index 9c72ac1..64e14b5 100644
--- a/init.lua
+++ b/init.lua
@@ -1,8 +1,5 @@
 minetest.register_privilege("worldedit", "Can use WorldEdit commands")
 
---wip: check to make sure player positions are set before doing editing
---wip; fix meseconedit to export to new WorldEdit format
-
 worldedit = {}
 
 worldedit.set_pos = {}
@@ -312,7 +309,12 @@ minetest.register_chatcommand("/load", {
 		local value = file:read("*a")
 		file:close()
 
-		local count = worldedit.deserialize(pos1, value)
+		local count
+		if value:find("{") then --old WorldEdit format
+			count = worldedit.deserialize_old(pos1, value)
+		else --new WorldEdit format
+			count = worldedit.deserialize(pos1, value)
+		end
 
 		minetest.chat_send_player(name, count .. " nodes loaded")
 	end,