add hemtt support, major refactor

- no longer supports server events
- can now more easily build using hemtt
- extension vastly improved in both structure and functionality
- tested on listen server
- includes schema change

extension/AttendanceTracker/internal/util/config.go

@@ -0,0 +1,65 @@
+package util
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/spf13/viper"
+)
+
+var ConfigJSON = viper.New()
+
+func LoadConfig(modulePathDir string) (string, error) {
+	ConfigJSON.SetConfigName("AttendanceTracker.config")
+	ConfigJSON.SetConfigType("json")
+	ConfigJSON.AddConfigPath(".")
+	ConfigJSON.AddConfigPath(modulePathDir)
+
+	ConfigJSON.SetDefault("armaConfig.dbUpdateInterval", "90s")
+	ConfigJSON.SetDefault("armaConfig.debug", true)
+	ConfigJSON.SetDefault("sqlConfig", map[string]interface{}{
+		"mysqlHost":     "localhost",
+		"mysqlPort":     3306,
+		"mysqlUser":     "root",
+		"mysqlPassword": "password",
+		"mysqlDatabase": "a3attendance",
+	})
+	ConfigJSON.SetDefault("armaConfig", map[string]interface{}{
+		"debug":             true,
+		"traceLogToFile":    false,
+		"dbUpdateIntervalS": 60,
+	})
+
+	wd, err := os.Getwd()
+	if err != nil {
+		return "", err
+	}
+	if err := ConfigJSON.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			// Config file not found; ignore error if desired
+			return "", fmt.Errorf(
+				"config file not found, using defaults! searched in %s",
+				[]string{
+					ConfigJSON.ConfigFileUsed(),
+					modulePathDir,
+					wd,
+				},
+			)
+		} else {
+			// Config file was found but another error was produced
+			return "", err
+		}
+	}
+
+	return "Config loaded successfully!", nil
+}
+
+func ConfigArmaFormat() (string, error) {
+	armaConfig := ConfigJSON.GetStringMap("armaConfig")
+	bytes, err := json.Marshal(armaConfig)
+	if err != nil {
+		return "", err
+	}
+	return string(bytes), nil
+}