first

backend/internal/config/config.go

@@ -0,0 +1,76 @@
+package config
+
+import (
+	"os"
+	"strconv"
+	"strings"
+)
+
+type Config struct {
+	HTTPPort      string
+	MQTTBroker    string
+	MQTTUsername  string
+	MQTTPassword  string
+	MQTTClientID  string
+	MQTTSubscribe string
+	MQTTQOS       byte
+	SQLitePath    string
+	TTLDays       int
+	MQTTDebug     bool
+	SettingsFile  string
+	SysSubscribe  string
+}
+
+func Load() Config {
+	cfg := Config{
+		HTTPPort:      getEnv("PORT", "8088"),
+		MQTTBroker:    getEnv("MQTT_BROKER", "tcp://broker.hivemq.com:1883"),
+		MQTTUsername:  getEnv("MQTT_USERNAME", ""),
+		MQTTPassword:  getEnv("MQTT_PASSWORD", ""),
+		MQTTClientID:  getEnv("MQTT_CLIENT_ID", "mqtt-web-explorer"),
+		MQTTSubscribe: getEnv("MQTT_SUBSCRIBE", "#"),
+		SQLitePath:    getEnv("SQLITE_DB", "./data/mqtt.db"),
+		TTLDays:       getEnvInt("TTL_DAYS", 7),
+		MQTTQOS:       byte(getEnvInt("MQTT_QOS", 0)),
+		MQTTDebug:     getEnvBool("MQTT_DEBUG", false),
+		SettingsFile:  getEnv("SETTINGS_FILE", "/data/settings.yml"),
+		SysSubscribe:  getEnv("MQTT_SYS_SUBSCRIBE", "$SYS/#"),
+	}
+
+	return cfg
+}
+
+func getEnv(key, fallback string) string {
+	val := os.Getenv(key)
+	if val == "" {
+		return fallback
+	}
+	return val
+}
+
+func getEnvInt(key string, fallback int) int {
+	val := os.Getenv(key)
+	if val == "" {
+		return fallback
+	}
+	parsed, err := strconv.Atoi(val)
+	if err != nil {
+		return fallback
+	}
+	return parsed
+}
+
+func getEnvBool(key string, fallback bool) bool {
+	val := os.Getenv(key)
+	if val == "" {
+		return fallback
+	}
+	switch strings.ToLower(val) {
+	case "1", "true", "yes", "on":
+		return true
+	case "0", "false", "no", "off":
+		return false
+	default:
+		return fallback
+	}
+}