netdata/netdata.lua at master · wyozi-gmod/netdata · GitHub

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local Entity = FindMetaTable("Entity")

if SERVER then
	function Entity:NetDataUpdate()
		net.Start("netdata")
		net.WriteEntity(self)
		net.WriteUInt(self.NetDataHash and tonumber(util.CRC(self:NetDataHash())) or 0, 32)
		self:NetDataWrite()
		net.SendPVS(self:GetPos())
	end

	util.AddNetworkString("netdata")
	net.Receive("netdata", function(len, cl)
		local ent = net.ReadEntity()
		local prevHash = net.ReadUInt(32)

		if IsValid(ent) and ent.NetDataWrite then
			local curHash = ent.NetDataHash and tonumber(util.CRC(ent:NetDataHash())) or 0
			if curHash == 0 or prevHash == 0 or curHash ~= prevHash then
				net.Start("netdata")
				net.WriteEntity(ent)
				net.WriteUInt(curHash, 32)
				ent:NetDataWrite()
				net.Send(cl)
			end
		end
	end)
end
if CLIENT then
	hook.Add("NotifyShouldTransmit", "NetDataRequest", function(e, should)
		if e.NetDataRead and should then
			local prevHash = e._NetDataPrevHash or 0

			net.Start("netdata")
			net.WriteEntity(e)
			net.WriteUInt(prevHash, 32)
			net.SendToServer()

			if cvars.Number("developer") > 0 then
				print("[NetData] Asking for netdata due to PVS for " .. tostring(e) .. " using hash " .. prevHash)
			end
		end
	end)
	hook.Add("NetworkEntityCreated", "NetDataRequest", function(e)
		local sent = scripted_ents.GetStored(e:GetClass())
		if e.NetDataRead or (sent and sent.t and sent.t.NetDataRead) then
			net.Start("netdata")
			net.WriteEntity(e)
			net.WriteUInt(0, 32)
			net.SendToServer()

			if cvars.Number("developer") > 0 then
				print("[NetData] Asking for netdata due to NEC for " .. tostring(e))
			end
		end
	end)

	net.Receive("netdata", function(len, cl)
		local ent = net.ReadEntity()
		local hash = net.ReadUInt(32)
		if IsValid(ent) then
			if cvars.Number("developer") > 0 then
				print("[NetData] Received netdata for " .. tostring(ent) .. " with hash " .. hash)
			end
			ent:NetDataRead()
			ent._NetDataPrevHash = hash
		end
	end)
end

if SERVER then
	util.AddNetworkString("entaction")
	net.Receive("entaction", function(len, cl)
		local ent = net.ReadEntity()
		if IsValid(ent) and ent.ReceiveNetAction then
			ent:ReceiveNetAction(cl)
		end
	end)
end
if CLIENT then
	function Entity:StartNetAction(unreliable)
		net.Start("entaction", unreliable)
		net.WriteEntity(self)
	end
end