Added addon to send player connect and disconnect

.gitignore

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+server/

install_server.sh

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+mkdir -p server/steam
+
+cd server/steam
+wget https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz
+tar xfvz steamcmd_linux.tar.gz
+rm steamcmd_linux.tar.gz
+
+
+cd ..
+./steam/steamcmd.sh +force_install_dir ../ +login anonymous +app_update 4020 validate +quit
+
+cd ..
+echo "done"

src/sh_ontime_handler_gmod.lua

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+local config = {}
+
+function error(message, err)
+	print("Sh_ONTIME_HANDLER", "ERROR", message, err)
+end
+
+function info(message)
+	print("Sh_ONTIME_HANDLER", "INFO", message)
+end
+
+function readConfig()
+	local JSONData = file.Read("config.json", "DATA")
+	if JSONData == nil then
+		error("Config not found!")
+	end
+
+	config = util.JSONToTable(JSONData)
+	if config == nil || config.apiURL == nil || config.apiKey == nil then
+		error("Invalid config!")
+		exit()
+	end
+	info("Config loaded")
+end
+
+local function getUserJoinedMutation(id)
+    return util.TableToJSON({
+        query = "mutation { userJoinedGameServer { userJoined(input: { ident: \"" .. id .. "\" }) { id } } }"
+    })
+end
+
+local function getUserLeftMutation(id)
+    return util.TableToJSON({
+        ['query'] = "mutation { userJoinedGameServer { userLeft(input: { ident: \"" .. id .. "\" }) { id } } }"
+    })
+end
+
+function sendJoinedPlayer(id)
+	HTTP({
+        url=config.apiURL, 
+        method="POST", 
+        headers={
+			['Authorization']="API-Key " .. config.apiKey
+        },
+		type="application/json",
+        success=function( code, body, headers )
+        end, 
+        failed=function( err ) 
+			error("Cannot send player joined", err)
+        end,
+        body=getUserJoinedMutation(id)
+	})
+end
+
+function sendLeftPlayer(id)
+	HTTP({
+        url=config.apiURL, 
+        method="POST", 
+        headers={
+			['Authorization']="API-Key " .. config.apiKey
+        },
+		type="application/json",
+        success=function( code, body, headers )
+        end, 
+        failed=function( err ) 
+			error("Cannot send player joined", err)
+        end,
+        body=getUserLeftMutation(id)
+	})
+end
+
+info("Loading")
+readConfig()
+
+info("Listening")
+gameevent.Listen( "player_connect" )
+hook.Add("player_connect", "HandlePlayerConnect", function( data )
+	info(string.format("Player %s connected", data.name))
+	sendJoinedPlayer(data.networkid)
+end)
+
+gameevent.Listen( "player_disconnect" )
+hook.Add("player_disconnect", "HandlePlayerDisconnect", function( data )
+	info(string.format("Player %s disconnected", data.name))
+	sendLeftPlayer(data.networkid)
+end)

start_server.sh

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+mkdir -p server/garrysmod/lua/autorun/server/sh_ontime_handler_gmod
+
+cp src/* server/garrysmod/lua/autorun/server/
+
+
+cd server
+./srcds_run -game garrysmod -game garrysmod +map gm_construct +ip 0.0.0.0 -allowlocalhttp
+
+cd ..