d0137179e5
- neues Paket mqttheartbeat: Publisher mit paho, topic signage/screen/<id>/heartbeat,
payload {screen_id, ts, status, server_connectivity}, auto-reconnect bei Ausfall
- MORZ_INFOBOARD_MQTT_BROKER leer (Standard) -> MQTT komplett uebersprungen
- app.emitHeartbeat() publiziert bei jedem Tick per MQTT wenn Broker konfiguriert,
loggt Fehler und laeuft weiter (kein Stop bei MQTT-Ausfall)
- mqtt.Close() bei context.Done()
- MQTTBroker-Default von tcp://127.0.0.1:1883 auf "" geaendert
- erste externe Dep: github.com/eclipse/paho.mqtt.golang v1.5.1
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
85 lines
1.9 KiB
Go
85 lines
1.9 KiB
Go
package config
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import (
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"encoding/json"
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"fmt"
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"os"
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)
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type Config struct {
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ScreenID string `json:"screen_id"`
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ServerBaseURL string `json:"server_base_url"`
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MQTTBroker string `json:"mqtt_broker"`
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HeartbeatEvery int `json:"heartbeat_every_seconds"`
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StatusReportEvery int `json:"status_report_every_seconds"`
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}
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const defaultConfigPath = "/etc/signage/config.json"
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func Load() (Config, error) {
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cfg := defaultConfig()
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configPath := getenv("MORZ_INFOBOARD_CONFIG", defaultConfigPath)
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if err := loadFromFile(configPath, &cfg); err != nil {
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if !os.IsNotExist(err) {
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return Config{}, fmt.Errorf("load config file: %w", err)
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}
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}
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overrideFromEnv(&cfg)
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if cfg.ScreenID == "" {
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return Config{}, fmt.Errorf("screen id is required")
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}
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if cfg.HeartbeatEvery <= 0 {
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cfg.HeartbeatEvery = defaultConfig().HeartbeatEvery
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}
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if cfg.StatusReportEvery <= 0 {
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cfg.StatusReportEvery = defaultConfig().StatusReportEvery
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}
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return cfg, nil
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}
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func defaultConfig() Config {
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return Config{
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ScreenID: "unset-screen",
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ServerBaseURL: "http://127.0.0.1:8080",
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MQTTBroker: "",
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HeartbeatEvery: 30,
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StatusReportEvery: 60,
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}
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}
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func loadFromFile(path string, cfg *Config) error {
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data, err := os.ReadFile(path)
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if err != nil {
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return err
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}
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return json.Unmarshal(data, cfg)
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}
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func overrideFromEnv(cfg *Config) {
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cfg.ScreenID = getenv("MORZ_INFOBOARD_SCREEN_ID", cfg.ScreenID)
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cfg.ServerBaseURL = getenv("MORZ_INFOBOARD_SERVER_URL", cfg.ServerBaseURL)
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cfg.MQTTBroker = getenv("MORZ_INFOBOARD_MQTT_BROKER", cfg.MQTTBroker)
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if value := getenv("MORZ_INFOBOARD_STATUS_REPORT_EVERY", ""); value != "" {
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var parsed int
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_, _ = fmt.Sscanf(value, "%d", &parsed)
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if parsed > 0 {
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cfg.StatusReportEvery = parsed
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}
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}
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}
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func getenv(key, fallback string) string {
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value := os.Getenv(key)
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if value == "" {
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return fallback
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}
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return value
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}
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