diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f74c5d7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+
+*.log
+
+\@17thAttendanceTracker/config.json
+
+*.bak
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker.pbo b/@17thAttendanceTracker/addons/AttendanceTracker.pbo
new file mode 100644
index 0000000..d860fd1
Binary files /dev/null and b/@17thAttendanceTracker/addons/AttendanceTracker.pbo differ
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker/config.cpp b/@17thAttendanceTracker/addons/AttendanceTracker/config.cpp
new file mode 100644
index 0000000..3b93ee5
--- /dev/null
+++ b/@17thAttendanceTracker/addons/AttendanceTracker/config.cpp
@@ -0,0 +1,25 @@
+class CfgPatches {
+	class AttendanceTracker {
+		units[] = {};
+		weapons[] = {};
+		requiredVersion = 2.10;
+		requiredAddons[] = {};
+		author[] = {"IndigoFox"};
+		authorUrl = "http://example.com";
+	};
+};
+
+class CfgFunctions {
+	class attendanceTracker {
+		class functions {
+			file = "\AttendanceTracker\functions";
+			class postInit {postInit = 1;};
+			class eventHandlers {};
+			class callbackHandler {postInit = 1;};
+			class log {};
+			class logMissionEvent {};
+			class logServerEvent {};
+			class timestamp {};
+		};
+	};
+};
\ No newline at end of file
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_callbackHandler.sqf b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_callbackHandler.sqf
new file mode 100644
index 0000000..bc8321c
--- /dev/null
+++ b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_callbackHandler.sqf
@@ -0,0 +1,48 @@
+addMissionEventHandler ["ExtensionCallback", {
+	params ["_name", "_function", "_data"];
+	if !(_name == "AttendanceTracker") exitWith {};
+
+	// Validate data param
+	if (isNil "_data") then {_data = ""};
+
+	if (_data isEqualTo "") exitWith {
+		[
+			format ["Callback empty data: %1", _function],
+			"WARN"
+		] call attendanceTracker_fnc_log;
+		false;
+	};
+
+	if (typeName _data != "STRING") exitWith {
+		[
+			format ["Callback invalid data: %1: %2", _function, _data],
+			"WARN"
+		] call attendanceTracker_fnc_log;
+		false;
+	};
+
+	// Parse response from string array
+	private "_response";
+	try {
+		// diag_log format ["Raw callback: %1: %2", _function, _data];
+		_response = parseSimpleArray _data;
+	} catch {
+		[
+			format ["Callback invalid data: %1: %2: %3", _function, _data, _exception],
+			"WARN"
+		] call attendanceTracker_fnc_log;
+	};
+
+	if (isNil "_response") exitWith {false};
+
+	switch (_function) do {
+		case "connectDB": {
+			systemChat format ["AttendanceTracker: %1", _response#0];
+			[_response#0, _response#1, _function] call attendanceTracker_fnc_log;
+		};
+		default {
+			_response call attendanceTracker_fnc_log;
+		};
+	};
+	true;
+}];
\ No newline at end of file
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_eventHandlers.sqf b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_eventHandlers.sqf
new file mode 100644
index 0000000..7ac520e
--- /dev/null
+++ b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_eventHandlers.sqf
@@ -0,0 +1,78 @@
+[
+	["OnUserConnected", {
+		params ["_networkId", "_clientStateNumber", "_clientState"];
+		private _userInfo = (getUserInfo _networkId);
+		_userInfo params ["_playerID", "_ownerId", "_playerUID", "_profileName", "_displayName", "_steamName", "_clientState", "_isHC", "_adminState", "_networkInfo", "_unit"];
+		if (_isHC) exitWith {};
+
+		[
+			"ConnectedServer",
+			_playerUID,
+			_profileName,
+			_steamName
+		] call attendanceTracker_fnc_logServerEvent;
+
+		(AttendanceTracker getVariable ["allUsers", createHashMap]) set [_networkId, _userInfo];
+
+		[format ["(EventHandler) OnUserConnected fired: %1", _this], "DEBUG"] call attendanceTracker_fnc_log;
+	}],
+	["OnUserDisconnected", {
+		params ["_networkId", "_clientStateNumber", "_clientState"];
+		private _userInfo = (AttendanceTracker getVariable ["allUsers", createHashMap]) get [_networkId, nil];
+		if (isNil "_userInfo") exitWith {};
+
+		_userInfo params ["_playerID", "_ownerId", "_playerUID", "_profileName", "_displayName", "_steamName", "_clientState", "_isHC", "_adminState", "_networkInfo", "_unit"];
+		if (_isHC) exitWith {};
+
+		[
+			"DisconnectedServer",
+			_playerUID,
+			_profileName,
+			_steamName
+		] call attendanceTracker_fnc_logServerEvent;
+
+		[format ["(EventHandler) OnUserDisconnected fired: %1", _this], "DEBUG"] call attendanceTracker_fnc_log;
+	}],
+	["PlayerConnected", {
+		params ["_id", "_uid", "_name", "_jip", "_owner", "_idstr"];
+		private _userInfo = (getUserInfo _idstr);
+		if (isNil "_userInfo") exitWith {};
+
+		_userInfo params ["_playerID", "_ownerId", "_playerUID", "_profileName", "_displayName", "_steamName", "_clientState", "_isHC", "_adminState", "_networkInfo", "_unit"];
+
+		(AttendanceTracker getVariable ["allUsers", createHashMap]) set [_playerID, _userInfo];
+
+		if (_isHC) exitWith {};
+		
+		[
+			"ConnectedMission",
+			_playerUID,
+			_profileName,
+			_steamName,
+			_jip,
+			roleDescription _unit
+		] call attendanceTracker_fnc_logMissionEvent;
+
+		[format ["(EventHandler) PlayerConnected fired: %1", _this], "DEBUG"] call attendanceTracker_fnc_log;
+	}],
+	["HandleDisconnect", {
+		params ["_unit", "_id", "_uid", "_name"];
+		private _userInfo = (AttendanceTracker getVariable ["allUsers", createHashMap]) get [_id toFixed 0, nil];
+		if (isNil "_userInfo") exitWith {};
+
+		_userInfo params ["_playerID", "_ownerId", "_playerUID", "_profileName", "_displayName", "_steamName", "_clientState", "_isHC", "_adminState", "_networkInfo", "_unit"];
+
+		if (_isHC) exitWith {};
+		
+		[
+			"DisconnectedMission",
+			_playerUID,
+			_profileName,
+			_steamName,
+			_jip
+		] call attendanceTracker_fnc_logMissionEvent;
+		
+		[format ["(EventHandler) HandleDisconnect fired: %1", _this], "DEBUG"] call attendanceTracker_fnc_log;
+		false;
+	}]
+];
\ No newline at end of file
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_log.sqf b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_log.sqf
new file mode 100644
index 0000000..307b019
--- /dev/null
+++ b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_log.sqf
@@ -0,0 +1,17 @@
+params [
+	["_message", "", [""]],
+	["_level", "INFO", [""]],
+	"_function"
+];
+
+if (isNil "_message") exitWith {false};
+
+"AttendanceTracker" callExtension ["log", [_level, _message]];
+
+if (!isNil "_function") then {
+	diag_log formatText["[AttendanceTracker] (%1): <%2> %3", _level, _function, _message];
+} else {
+	diag_log formatText["[AttendanceTracker] (%1): %2", _level, _message];
+};
+
+true;
\ No newline at end of file
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_logMissionEvent.sqf b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_logMissionEvent.sqf
new file mode 100644
index 0000000..4967873
--- /dev/null
+++ b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_logMissionEvent.sqf
@@ -0,0 +1,20 @@
+params [
+	["_eventType", ""],
+	["_playerUID", ""],
+	["_profileName", ""],
+	["_steamName", ""],
+	["_isJIP", false, [true, false]],
+	["_roleDescription", ""]
+];
+
+private _hash = + (AttendanceTracker getVariable ["missionContext", createHashMap]);
+_hash set ["eventType", _eventType];
+_hash set ["playerUID", _playerUID];
+_hash set ["profileName", _profileName];
+_hash set ["steamName", _steamName];
+_hash set ["isJIP", _isJIP];
+_hash set ["roleDescription", _roleDescription];
+
+"AttendanceTracker" callExtension ["logAttendance", [[_hash] call CBA_fnc_encodeJSON]];
+
+true;
\ No newline at end of file
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_logServerEvent.sqf b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_logServerEvent.sqf
new file mode 100644
index 0000000..cbadacb
--- /dev/null
+++ b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_logServerEvent.sqf
@@ -0,0 +1,19 @@
+params [
+	["_eventType", ""],
+	["_playerUID", ""],
+	["_profileName", ""],
+	["_steamName", ""]
+];
+
+
+private _hash = + (AttendanceTracker getVariable ["missionContext", createHashMap]);
+_hash set ["eventType", _eventType];
+_hash set ["playerUID", _playerUID];
+_hash set ["profileName", _profileName];
+_hash set ["steamName", _steamName];
+_hash set ["isJIP", ""];
+_hash set ["roleDescription", ""];
+
+"AttendanceTracker" callExtension ["logAttendance", [[_hash] call CBA_fnc_encodeJSON]];
+
+true;
\ No newline at end of file
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_postInit.sqf b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_postInit.sqf
new file mode 100644
index 0000000..baca6da
--- /dev/null
+++ b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_postInit.sqf
@@ -0,0 +1,37 @@
+
+AttendanceTracker = false call CBA_fnc_createNamespace;
+
+AttendanceTracker setVariable ["missionContext", createHashMapFromArray [
+	["missionName", missionName],
+	["briefingName", briefingName],
+	["missionNameSource", missionNameSource],
+	["onLoadName", getMissionConfigValue ["onLoadName", ""]],
+	["author", getMissionConfigValue ["author", ""]],
+	["serverName", serverName],
+	["serverProfile", profileName],
+	["missionStart", call attendanceTracker_fnc_timestamp]
+]];
+
+// store all user details in a hash when they connect so we can reference it in disconnect events
+AttendanceTracker setVariable ["allUsers", createHashMap];
+
+private _database = "AttendanceTracker" callExtension "connectDB";
+systemChat "AttendanceTracker: Connecting to database...";
+["Connecting to database...", "INFO"] call attendanceTracker_fnc_log;
+
+{
+	if (!isServer) exitWith {};
+	_x params ["_ehName", "_code"];
+
+	_handle = (addMissionEventHandler [_ehName, _code]);
+    if (isNil "_handle") then {
+        [format["Failed to add Mission event handler: %1", _x], "ERROR"] call attendanceTracker_fnc_log;
+		false;
+    } else {
+        missionNamespace setVariable [
+            ("AttendanceTracker" + "_MEH_" + _ehName),
+            _handle
+        ];
+        true;
+    };
+} forEach (call attendanceTracker_fnc_eventHandlers);
\ No newline at end of file
diff --git a/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_timestamp.sqf b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_timestamp.sqf
new file mode 100644
index 0000000..19f8fb3
--- /dev/null
+++ b/@17thAttendanceTracker/addons/AttendanceTracker/functions/fn_timestamp.sqf
@@ -0,0 +1 @@
+(parseSimpleArray ("AttendanceTracker" callExtension "getTimestamp")) select 0;
\ No newline at end of file
diff --git a/@17thAttendanceTracker/config.example.json b/@17thAttendanceTracker/config.example.json
new file mode 100644
index 0000000..a9b32eb
--- /dev/null
+++ b/@17thAttendanceTracker/config.example.json
@@ -0,0 +1,7 @@
+{
+  "mysqlHost": "127.0.0.1",
+  "mysqlPort": 3306,
+  "mysqlUser": "root",
+  "mysqlPassword": "root",
+  "mysqlDatabase": "db"
+}
\ No newline at end of file
diff --git a/@17thAttendanceTracker/mod.cpp b/@17thAttendanceTracker/mod.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/extension/@17thAttendanceTracker/config.example.json b/extension/@17thAttendanceTracker/config.example.json
new file mode 100644
index 0000000..a9b32eb
--- /dev/null
+++ b/extension/@17thAttendanceTracker/config.example.json
@@ -0,0 +1,7 @@
+{
+  "mysqlHost": "127.0.0.1",
+  "mysqlPort": 3306,
+  "mysqlUser": "root",
+  "mysqlPassword": "root",
+  "mysqlDatabase": "db"
+}
\ No newline at end of file
diff --git a/extension/AttendanceTracker_x64.dll b/extension/AttendanceTracker_x64.dll
new file mode 100644
index 0000000..4620634
Binary files /dev/null and b/extension/AttendanceTracker_x64.dll differ
diff --git a/extension/AttendanceTracker_x64.h b/extension/AttendanceTracker_x64.h
new file mode 100644
index 0000000..0282d20
--- /dev/null
+++ b/extension/AttendanceTracker_x64.h
@@ -0,0 +1,86 @@
+/* Code generated by cmd/cgo; DO NOT EDIT. */
+
+/* package main.go */
+
+
+#line 1 "cgo-builtin-export-prolog"
+
+#include <stddef.h> /* for ptrdiff_t below */
+
+#ifndef GO_CGO_EXPORT_PROLOGUE_H
+#define GO_CGO_EXPORT_PROLOGUE_H
+
+#ifndef GO_CGO_GOSTRING_TYPEDEF
+typedef struct { const char *p; ptrdiff_t n; } _GoString_;
+#endif
+
+#endif
+
+/* Start of preamble from import "C" comments.  */
+
+
+#line 3 "main.go"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "extensionCallback.h"
+
+#line 1 "cgo-generated-wrapper"
+
+
+/* End of preamble from import "C" comments.  */
+
+
+/* Start of boilerplate cgo prologue.  */
+#line 1 "cgo-gcc-export-header-prolog"
+
+#ifndef GO_CGO_PROLOGUE_H
+#define GO_CGO_PROLOGUE_H
+
+typedef signed char GoInt8;
+typedef unsigned char GoUint8;
+typedef short GoInt16;
+typedef unsigned short GoUint16;
+typedef int GoInt32;
+typedef unsigned int GoUint32;
+typedef long long GoInt64;
+typedef unsigned long long GoUint64;
+typedef GoInt64 GoInt;
+typedef GoUint64 GoUint;
+typedef __SIZE_TYPE__ GoUintptr;
+typedef float GoFloat32;
+typedef double GoFloat64;
+typedef float _Complex GoComplex64;
+typedef double _Complex GoComplex128;
+
+/*
+  static assertion to make sure the file is being used on architecture
+  at least with matching size of GoInt.
+*/
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+
+#ifndef GO_CGO_GOSTRING_TYPEDEF
+typedef _GoString_ GoString;
+#endif
+typedef void *GoMap;
+typedef void *GoChan;
+typedef struct { void *t; void *v; } GoInterface;
+typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+
+#endif
+
+/* End of boilerplate cgo prologue.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern __declspec(dllexport) void goRVExtensionVersion(char* output, size_t outputsize);
+extern __declspec(dllexport) void goRVExtensionArgs(char* output, size_t outputsize, char* input, char** argv, int argc);
+extern __declspec(dllexport) void goRVExtension(char* output, size_t outputsize, char* input);
+extern __declspec(dllexport) void goRVExtensionRegisterCallback(extensionCallback fnc);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/extension/RVExtension.c b/extension/RVExtension.c
new file mode 100644
index 0000000..70fb2a6
--- /dev/null
+++ b/extension/RVExtension.c
@@ -0,0 +1,61 @@
+#include <stdlib.h>
+
+#include "extensionCallback.h"
+
+extern void goRVExtension(char *output, size_t outputSize, char *input);
+extern void goRVExtensionVersion(char *output, size_t outputSize);
+extern void goRVExtensionArgs(char *output, size_t outputSize, char *input, char **argv, int argc);
+extern void goRVExtensionRegisterCallback(extensionCallback fnc);
+
+#ifdef WIN64
+__declspec(dllexport) void RVExtension(char *output, size_t outputSize, char *input)
+{
+  goRVExtension(output, outputSize, input);
+}
+
+__declspec(dllexport) void RVExtensionVersion(char *output, size_t outputSize)
+{
+  goRVExtensionVersion(output, outputSize);
+}
+
+__declspec(dllexport) void RVExtensionArgs(char *output, size_t outputSize, char *input, char **argv, int argc)
+{
+  goRVExtensionArgs(output, outputSize, input, argv, argc);
+}
+
+__declspec(dllexport) void RVExtensionRegisterCallback(extensionCallback fnc)
+{
+  goRVExtensionRegisterCallback(fnc);
+}
+#else
+__declspec(dllexport) void __stdcall _RVExtension(char *output, size_t outputSize, char *input)
+{
+  goRVExtension(output, outputSize, input);
+}
+
+__declspec(dllexport) void __stdcall _RVExtensionVersion(char *output, size_t outputSize)
+{
+  goRVExtensionVersion(output, outputSize);
+}
+
+__declspec(dllexport) void __stdcall _RVExtensionArgs(char *output, size_t outputSize, char *input, char **argv, int argc)
+{
+  goRVExtensionArgs(output, outputSize, input, argv, argc);
+}
+
+__declspec(dllexport) void __stdcall _RVExtensionRegisterCallback(extensionCallback fnc)
+{
+  goRVExtensionRegisterCallback(fnc);
+}
+#endif
+// do this for all the other exported functions
+
+// dll entrypoint
+// Path: RVExtension.c
+
+#include <windows.h>
+
+BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{
+  return TRUE;
+}
diff --git a/extension/build.txt b/extension/build.txt
new file mode 100644
index 0000000..0be8802
--- /dev/null
+++ b/extension/build.txt
@@ -0,0 +1,3 @@
+$ENV:GOARCH = "amd64"
+$ENV:CGO_ENABLED = 1
+go1.16.4 build -o AttendanceTracker_x64.dll -buildmode=c-shared .
\ No newline at end of file
diff --git a/extension/callExtension.exe b/extension/callExtension.exe
new file mode 100644
index 0000000..a4b9e74
Binary files /dev/null and b/extension/callExtension.exe differ
diff --git a/extension/callExtension_x64.exe b/extension/callExtension_x64.exe
new file mode 100644
index 0000000..f2c652c
Binary files /dev/null and b/extension/callExtension_x64.exe differ
diff --git a/extension/extensionCallback.h b/extension/extensionCallback.h
new file mode 100644
index 0000000..1381732
--- /dev/null
+++ b/extension/extensionCallback.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#include <stdlib.h>
+
+typedef int (*extensionCallback)(char const *name, char const *function, char const *data);
+
+/* https://golang.org/cmd/cgo/#hdr-C_references_to_Go */
+static inline int runExtensionCallback(extensionCallback fnc, char const *name, char const *function, char const *data)
+{
+	return fnc(name, function, data);
+}
\ No newline at end of file
diff --git a/extension/go.mod b/extension/go.mod
new file mode 100644
index 0000000..db66596
--- /dev/null
+++ b/extension/go.mod
@@ -0,0 +1,5 @@
+module main.go
+
+go 1.16
+
+require github.com/go-sql-driver/mysql v1.6.0
diff --git a/extension/go.sum b/extension/go.sum
new file mode 100644
index 0000000..20c16d6
--- /dev/null
+++ b/extension/go.sum
@@ -0,0 +1,2 @@
+github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
+github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
diff --git a/extension/main.go b/extension/main.go
new file mode 100644
index 0000000..c5b3da6
--- /dev/null
+++ b/extension/main.go
@@ -0,0 +1,341 @@
+package main
+
+/*
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "extensionCallback.h"
+*/
+import "C" // This is required to import the C code
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+	"unsafe"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+var EXTENSION_VERSION string = "0.0.1"
+var extensionCallbackFnc C.extensionCallback
+
+// file paths
+var ADDON_FOLDER string = getDir() + "\\@17thAttendanceTracker"
+var LOG_FILE string = ADDON_FOLDER + "\\attendanceTracker.log"
+var CONFIG_FILE string = ADDON_FOLDER + "\\config.json"
+
+var ATConfig AttendanceTrackerConfig
+
+type AttendanceTrackerConfig struct {
+	MySQLHost     string `json:"mysqlHost"`
+	MySQLPort     int    `json:"mysqlPort"`
+	MySQLUser     string `json:"mysqlUser"`
+	MySQLPassword string `json:"mysqlPassword"`
+	MySQLDatabase string `json:"mysqlDatabase"`
+}
+
+// database connection
+var db *sql.DB
+
+// configure log output
+func init() {
+	log.SetFlags(log.LstdFlags | log.Lshortfile)
+	// log to file
+	f, err := os.OpenFile(LOG_FILE, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		log.Fatalf("error opening file: %v", err)
+	}
+	// log to console as well
+	// log.SetOutput(io.MultiWriter(f, os.Stdout))
+	// log only to file
+	log.SetOutput(f)
+}
+
+func version() {
+	functionName := "version"
+	writeLog(functionName, fmt.Sprintf(`["AttendanceTracker Extension Version:%s", "INFO"]`, EXTENSION_VERSION))
+}
+
+func getDir() string {
+	dir, err := os.Getwd()
+	if err != nil {
+		log.Fatal(err)
+	}
+	return dir
+}
+
+func loadConfig() {
+	// load config from file as JSON
+	functionName := "loadConfig"
+	file, err := os.Open(CONFIG_FILE)
+	if err != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, err))
+		return
+	}
+	defer file.Close()
+
+	decoder := json.NewDecoder(file)
+	err = decoder.Decode(&ATConfig)
+	if err != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, err))
+		return
+	}
+	writeLog(functionName, `["Config loaded", "INFO"]`)
+}
+
+func connectDB() string {
+	functionName := "connectDB"
+	var err error
+
+	// load config
+	loadConfig()
+
+	// connect to database
+	connectionString := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", ATConfig.MySQLUser, ATConfig.MySQLPassword, ATConfig.MySQLHost, ATConfig.MySQLPort, ATConfig.MySQLDatabase)
+
+	db, err = sql.Open("mysql", connectionString)
+	if err != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, err))
+		return "ERROR"
+	}
+	if db == nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, "db is nil"))
+		return "ERROR"
+	}
+	// defer db.Close()
+
+	db.SetConnMaxLifetime(time.Minute * 3)
+	db.SetMaxOpenConns(10)
+	db.SetMaxIdleConns(10)
+
+	pingErr := db.Ping()
+	if pingErr != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, pingErr))
+		return "ERROR"
+	}
+
+	// Connect and check the server version
+	var version string
+	err = db.QueryRow("SELECT VERSION()").Scan(&version)
+	if err != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, err))
+		return "ERROR"
+	}
+	writeLog(functionName, fmt.Sprintf(`["Connected to MySQL/MariaDB version %s", "INFO"]`, version))
+	return version
+}
+
+type AttendanceLogItem struct {
+	MissionName       string `json:"missionName"`
+	BriefingName      string `json:"briefingName"`
+	MissionNameSource string `json:"missionNameSource"`
+	OnLoadName        string `json:"onLoadName"`
+	Author            string `json:"author"`
+	ServerName        string `json:"serverName"`
+	ServerProfile     string `json:"serverProfile"`
+	MissionStart      string `json:"missionStart"`
+	// situational
+	EventType       string `json:"eventType"`
+	PlayerUID       string `json:"playerUID"`
+	ProfileName     string `json:"profileName"`
+	SteamName       string `json:"steamName"`
+	IsJIP           bool   `json:"isJIP"`
+	RoleDescription string `json:"roleDescription"`
+}
+
+func writeAttendance(data string) {
+	functionName := "writeAttendance"
+	// data is json, parse it
+	stringjson := fixEscapeQuotes(trimQuotes(data))
+	var event AttendanceLogItem
+	err := json.Unmarshal([]byte(stringjson), &event)
+	if err != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, err))
+		return
+	}
+
+	// get MySQL friendly datetime
+	// first, convert string to int
+	missionStartTime, err := strconv.ParseInt(event.MissionStart, 10, 64)
+	if err != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, err))
+		return
+	}
+	t := time.Unix(0, missionStartTime).Format("2006-01-02 15:04:05")
+	// get MySQL friendly NOW
+	now := time.Now().Format("2006-01-02 15:04:05")
+
+	// prevent crash
+	if db == nil {
+		writeLog(functionName, `["db is nil", "ERROR"]`)
+		return
+	}
+
+	// send to DB
+
+	result, err := db.ExecContext(context.Background(), `INSERT INTO AttendanceLog (timestamp, mission_name, briefing_name, mission_name_source, on_load_name, author, server_name, server_profile, mission_start, event_type, player_uid, profile_name, steam_name, is_jip, role_description) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)`,
+		now,
+		event.MissionName,
+		event.BriefingName,
+		event.MissionNameSource,
+		event.OnLoadName,
+		event.Author,
+		event.ServerName,
+		event.ServerProfile,
+		t,
+		event.EventType,
+		event.PlayerUID,
+		event.ProfileName,
+		event.SteamName,
+		event.IsJIP,
+		event.RoleDescription,
+	)
+
+	if err != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, err))
+		return
+	}
+
+	id, err := result.LastInsertId()
+	if err != nil {
+		writeLog(functionName, fmt.Sprintf(`["%s", "ERROR"]`, err))
+		return
+	}
+
+	writeLog(functionName, fmt.Sprintf(`["Saved attendance for %s to row id %d", "INFO"]`, event.ProfileName, id))
+
+}
+
+func runExtensionCallback(name *C.char, function *C.char, data *C.char) C.int {
+	return C.runExtensionCallback(extensionCallbackFnc, name, function, data)
+}
+
+//export goRVExtensionVersion
+func goRVExtensionVersion(output *C.char, outputsize C.size_t) {
+	result := C.CString(EXTENSION_VERSION)
+	defer C.free(unsafe.Pointer(result))
+	var size = C.strlen(result) + 1
+	if size > outputsize {
+		size = outputsize
+	}
+	C.memmove(unsafe.Pointer(output), unsafe.Pointer(result), size)
+}
+
+//export goRVExtensionArgs
+func goRVExtensionArgs(output *C.char, outputsize C.size_t, input *C.char, argv **C.char, argc C.int) {
+	var offset = unsafe.Sizeof(uintptr(0))
+	var out []string
+	for index := C.int(0); index < argc; index++ {
+		out = append(out, C.GoString(*argv))
+		argv = (**C.char)(unsafe.Pointer(uintptr(unsafe.Pointer(argv)) + offset))
+	}
+
+	// temp := fmt.Sprintf("Function: %s nb params: %d params: %s!", C.GoString(input), argc, out)
+	temp := fmt.Sprintf("Function: %s nb params: %d", C.GoString(input), argc)
+
+	switch C.GoString(input) {
+	case "logAttendance": // callExtension ["serverEvent", [_hash] call CBA_fnc_encodeJSON];
+		if argc == 1 {
+			go writeAttendance(out[0])
+		}
+	}
+
+	// Return a result to Arma
+	result := C.CString(temp)
+	defer C.free(unsafe.Pointer(result))
+	var size = C.strlen(result) + 1
+	if size > outputsize {
+		size = outputsize
+	}
+
+	C.memmove(unsafe.Pointer(output), unsafe.Pointer(result), size)
+}
+
+func callBackExample() {
+	name := C.CString("arma")
+	defer C.free(unsafe.Pointer(name))
+	function := C.CString("funcToExecute")
+	defer C.free(unsafe.Pointer(function))
+	// Make a callback to Arma
+	for i := 0; i < 3; i++ {
+		time.Sleep(2 * time.Second)
+		param := C.CString(fmt.Sprintf("Loop: %d", i))
+		defer C.free(unsafe.Pointer(param))
+		runExtensionCallback(name, function, param)
+	}
+}
+
+func getTimestamp() int64 {
+	// get the current unix timestamp in nanoseconds
+	return time.Now().UnixNano()
+}
+
+func trimQuotes(s string) string {
+	// trim the start and end quotes from a string
+	return strings.Trim(s, `"`)
+}
+
+func fixEscapeQuotes(s string) string {
+	// fix the escape quotes in a string
+	return strings.Replace(s, `""`, `"`, -1)
+}
+
+func writeLog(functionName string, data string) {
+	statusName := C.CString("AttendanceTracker")
+	defer C.free(unsafe.Pointer(statusName))
+	statusFunction := C.CString(functionName)
+	defer C.free(unsafe.Pointer(statusFunction))
+	statusParam := C.CString(data)
+	defer C.free(unsafe.Pointer(statusParam))
+	runExtensionCallback(statusName, statusFunction, statusParam)
+
+	log.Printf(`%s: %s`, functionName, data)
+}
+
+//export goRVExtension
+func goRVExtension(output *C.char, outputsize C.size_t, input *C.char) {
+
+	var temp string
+
+	// logLine("goRVExtension", fmt.Sprintf(`["Input: %s",  "DEBUG"]`, C.GoString(input)), true)
+
+	switch C.GoString(input) {
+	case "version":
+		temp = EXTENSION_VERSION
+	case "getDir":
+		temp = getDir()
+	case "getTimestamp":
+		time := getTimestamp()
+		temp = fmt.Sprintf(`["%s"]`, strconv.FormatInt(time, 10))
+	case "connectDB":
+		go connectDB()
+		temp = fmt.Sprintf(`["%s"]`, "Connecting to DB")
+
+	default:
+		temp = fmt.Sprintf(`["%s"]`, "Unknown Function")
+	}
+
+	result := C.CString(temp)
+	defer C.free(unsafe.Pointer(result))
+	var size = C.strlen(result) + 1
+	if size > outputsize {
+		size = outputsize
+	}
+
+	C.memmove(unsafe.Pointer(output), unsafe.Pointer(result), size)
+	// return
+}
+
+//export goRVExtensionRegisterCallback
+func goRVExtensionRegisterCallback(fnc C.extensionCallback) {
+	extensionCallbackFnc = fnc
+}
+
+func main() {}
diff --git a/extension/test.sqf b/extension/test.sqf
new file mode 100644
index 0000000..3d218d3
--- /dev/null
+++ b/extension/test.sqf
@@ -0,0 +1,7 @@
+freeExtension "AttendanceTracker";
+"AttendanceTracker" callExtension "connectDB";
+sleep 2;
+"attendanceTracker" callExtension ["logAttendance", ["{""playerUID"": ""76561197991996737"", ""roleDescription"": ""NULL"", ""missionNameSource"": ""aaaltisaiatk"", ""eventType"": ""ConnectedMission"", ""briefingName"": ""aaaltisaiatk"", ""profileName"": ""IndigoFox"", ""serverName"": ""IndigoFox on DESKTOP-6B2U0AT"", ""steamName"": ""IndigoFox"", ""onLoadName"": ""NULL"", ""missionName"": ""aaaltisaiatk"", ""isJIP"": false, ""author"": ""IndigoFox"", ""missionStart"": ""1682549469590908300""}"]]
+"attendanceTracker" callExtension ["logAttendance", ["{""playerUID"": ""76561197991996737"", ""roleDescription"": ""NULL"", ""missionNameSource"": ""aaaltisaiatk"", ""eventType"": ""ConnectedServer"", ""briefingName"": ""aaaltisaiatk"", ""profileName"": ""IndigoFox"", ""serverName"": ""IndigoFox on DESKTOP-6B2U0AT"", ""steamName"": ""IndigoFox"", ""onLoadName"": ""NULL"", ""missionName"": ""aaaltisaiatk"", ""isJIP"": false, ""author"": ""IndigoFox"", ""missionStart"": ""1682549469590908300""}"]]
+sleep 15;
+exit;
\ No newline at end of file