1 files changed, 36 insertions, 0 deletions
diff --git a/server/chunk.lua b/server/chunk.lua
new file mode 100644
index 0000000..4fb2960
--- /dev/null
+++ b/server/chunk.lua
@@ -0,0 +1,36 @@
+local class = require"common.class"
+local Chunk = require"common.chunk".Chunk
+local json = require"common.dkjson"
+
+local ChunkS = class.extend(Chunk)
+function ChunkS.make(cls,...)
+	local self = Chunk.make(cls,...)
+	self.dirty = true
+	return self
+end
+function ChunkS.load_from_disk(cls,cp)
+	-- returns nil if not there
+	local filename = cp:filename()
+	local f = io.open(filename,"r")
+	if not f then return nil end
+	local j = json.decode(f:read("a"))
+	self = cls:from_packet_data(j)
+	f:close()
+	return self
+end
+function ChunkS.save_if_dirty(self)
+	if self.dirty then
+		print("saving chunk",self.cp)
+		local filename = self.cp:filename()
+		local f = io.open(filename,"w")
+		f:write(self:data_packet())
+		f:flush()
+		f:close()
+	end
+end
+function ChunkS.set_at(self,...)
+	Chunk.set_at(self,...)
+	self.dirty = true
+end
+
+return {ChunkS=ChunkS}