From c5fb8ef3f7e44aa42a0e193e61fd7509911d7f17 Mon Sep 17 00:00:00 2001
From: Cloud Wu <cloudwu@gmail.com>
Date: Mon, 14 Nov 2016 13:05:01 +0800
Subject: [PATCH] add sharedata.deepcopy

---
 lualib/sharedata.lua         | 12 ++++++++++
 lualib/sharedata/corelib.lua | 45 +++++++++++++++++++++++++++++++++++-
 2 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/lualib/sharedata.lua b/lualib/sharedata.lua
index 5526b327..a17a20ba 100644
--- a/lualib/sharedata.lua
+++ b/lualib/sharedata.lua
@@ -55,4 +55,16 @@ function sharedata.flush()
 	collectgarbage()
 end
 
+function sharedata.deepcopy(name, ...)
+	if cache[name] then
+		local cobj = cache[name].__obj
+		return sd.copy(cobj, ...)
+	end
+
+	local cobj = skynet.call(service, "lua", "query", name)
+	local ret = sd.copy(cobj, ...)
+	skynet.send(service, "lua", "confirm" , cobj)
+	return ret
+end
+
 return sharedata
diff --git a/lualib/sharedata/corelib.lua b/lualib/sharedata/corelib.lua
index 08d6dd3d..bd42cf1b 100644
--- a/lualib/sharedata/corelib.lua
+++ b/lualib/sharedata/corelib.lua
@@ -20,6 +20,7 @@ local isdirty = core.isdirty
 local index = core.index
 local needupdate = core.needupdate
 local len = core.len
+local core_nextkey = core.nextkey
 
 local function findroot(self)
 	while self.__parent do
@@ -106,7 +107,7 @@ end
 
 function conf.next(obj, key)
 	local cobj = getcobj(obj)
-	local nextkey = core.nextkey(cobj, key)
+	local nextkey = core_nextkey(cobj, key)
 	if nextkey then
 		return nextkey, obj[nextkey]
 	end
@@ -132,4 +133,46 @@ function conf.flush(obj)
 	getcobj(obj)
 end
 
+local function clone_table(cobj)
+	local obj = {}
+	local key
+	while true do
+		key = core_nextkey(cobj, key)
+		if key == nil then
+			break
+		end
+		local v = index(cobj, key)
+		if type(v) == "userdata" then
+			v = clone_table(v)
+		end
+		obj[key] = v
+	end
+	return obj
+end
+
+local function find_node(cobj, key, ...)
+	if key == nil then
+		return cobj
+	end
+	local cobj = index(cobj, key)
+	if cobj == nil then
+		return nil
+	end
+	if type(cobj) == "userdata" then
+		return find_node(cobj, ...)
+	end
+	return cobj
+end
+
+function conf.copy(cobj, ...)
+	cobj = find_node(cobj, ...)
+	if cobj then
+		if type(cobj) == "userdata" then
+			return clone_table(cobj)
+		else
+			return cobj
+		end
+	end
+end
+
 return conf