From c74c2a3133ad4d1f03b83021e53fb9e8a67b3914 Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Mon, 6 Feb 2023 11:46:31 +0000
Subject: tick timing in main server loop, refactor, start on saving/loading
 chunks

---
 server/map.lua | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 server/map.lua

(limited to 'server/map.lua')

diff --git a/server/map.lua b/server/map.lua
new file mode 100644
index 0000000..845c644
--- /dev/null
+++ b/server/map.lua
@@ -0,0 +1,44 @@
+local Map = require"common.map".Map
+local class = require"common.class"
+local worldgen = require"worldgen"
+
+local MapS = class.extend(Map)
+function MapS.obtain(self,cp)
+	-- obtain chunk at chunkpos cp by any means necessary
+	-- if already loaded, just return it
+	-- if available on disk, load that then return it
+	-- otherwise, generate a new chunk, load it, then return it.
+
+	-- false is not used on serverside. yet.
+
+	local ch = self:chunk(cp)
+	if ch then return ch end
+
+	local f = io.open(cp:filename(),"r")
+	if f then
+		local j = json.decode(f:read("a"))
+		ch = Chunk:from_packet_data(j)
+		f:close()
+	else
+		ch = worldgen.gen_chunk(cp)
+	end
+
+	self:add_chunk(ch)
+	return ch
+end
+function MapS.save_chunk(self,cp)
+	-- any attempt to save not-loaded chunks is silently ignored
+	local ch = self:chunk(cp)
+	if not ch then return end
+
+	local f = io.open(cp:filename(),"w")
+	f:write(ch:data_packet())
+	f:flush()
+	f:close()
+end
+function MapS.save_and_unload(self,cp)
+	self:save_chunk(cp)
+	self:remove_chunk(cp)
+end
+
+return {MapS=MapS}
-- 
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