lua_exports/Export.lua

--[[
dcsw server map: Export.lua
by Sacha Ligthert on 2024-01-14
----

Add the following lines to your Export.lua in your ...\Saved Games\DCS.openbeta\Scripts folder.
If they functions already exist, you will need to do some editing yourselves.
]]--

function LuaExportStart()
	package.path  = package.path..";"..lfs.currentdir().."/LuaSocket/?.lua"
	package.cpath = package.cpath..";"..lfs.currentdir().."/LuaSocket/?.dll"

	socket = require("socket")
	IPAddress = "192.168.1.2"
	Port = 12345

	MySocket = socket.try(socket.connect(IPAddress, Port))
	MySocket:setoption("tcp-nodelay",true) 
end

function LuaExportBeforeNextFrame()
end

function LuaExportAfterNextFrame()
end

function LuaExportStop()
	-- Terminate TCP connection
	if MySocket then 
		--socket.try(MySocket:send("exit\n"))
		MySocket:close()
	end
end

function LuaExportActivityNextEvent(t)

	-- Required to function normal
	local tNext = t

	-- Grab objects. Create JSON. Send off to server
	local o = LoGetWorldObjects()
	local json = '{"units":['
	for k,v in pairs(o) do
	    print(v.Type)  -- add this line for debugging purposes
	    local objectType = "unknown"
	    objectType = type(v.Type)
	    json = json .. string.format('{"age_in_seconds": %.1f, "unit_name":"%s", "group_name":"%s", "name":"%s", "latitude":%f, "longitude":%f, "altitude_in_feet":%f, "heading_in_rads":%f, "pitch_in_rads":%f, "bank_in_rads":%f, "coalition":"%s", "type":"%s"},', t, v.UnitName, v.GroupName, v.Name, v.LatLongAlt.Lat, v.LatLongAlt.Long, v.LatLongAlt.Alt, v.Heading, v.Pitch, v.Bank, v.Coalition, objectType )
	end

	-- Remove trialing comma
	json = json:sub(1, -2)

	-- Wrap up JSON
	json = json .. "]}"

	-- Send it awaaaaay!
	socket.try(MySocket:send(json))

	-- Come back in 10 seconds
	tNext = tNext + 10.0
	return tNext

end