124 lines
3.0 KiB
Go
124 lines
3.0 KiB
Go
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package control
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import (
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"context"
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"encoding/json"
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"fmt"
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"log"
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"time"
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mqtt "github.com/eclipse/paho.mqtt.golang"
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"tianyan-edge/internal/config"
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)
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type MqttManager struct {
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client mqtt.Client
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cfg *config.Config
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updates chan *config.Config // Channel to broadcast config updates
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}
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func NewMqttManager(cfg *config.Config) *MqttManager {
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return &MqttManager{
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cfg: cfg,
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updates: make(chan *config.Config, 10),
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}
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}
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func (m *MqttManager) Run(ctx context.Context) {
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if m.cfg.MqttBroker == "" {
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log.Println("mqtt: no broker configured, skipping")
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return
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}
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opts := mqtt.NewClientOptions()
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opts.AddBroker(m.cfg.MqttBroker)
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opts.SetClientID(m.cfg.GetDeviceIdentity())
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opts.SetUsername(m.cfg.MqttUser)
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opts.SetPassword(m.cfg.MqttPass)
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opts.SetAutoReconnect(true)
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opts.SetMaxReconnectInterval(1 * time.Minute)
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// LWT
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willTopic := fmt.Sprintf("tianyan/edge/%s/status", m.cfg.GetDeviceIdentity())
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opts.SetWill(willTopic, "offline", 1, true)
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opts.SetOnConnectHandler(func(c mqtt.Client) {
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log.Println("mqtt: connected to broker")
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c.Publish(willTopic, 1, true, "online")
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configTopic := fmt.Sprintf("tianyan/edge/%s/config", m.cfg.GetDeviceIdentity())
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token := c.Subscribe(configTopic, 1, m.handleConfigUpdate)
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token.Wait()
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if token.Error() != nil {
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log.Printf("mqtt: subscribe failed: %v", token.Error())
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} else {
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log.Printf("mqtt: subscribed to %s", configTopic)
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}
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})
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m.client = mqtt.NewClient(opts)
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if token := m.client.Connect(); token.Wait() && token.Error() != nil {
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log.Printf("mqtt: connect error: %v", token.Error())
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}
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<-ctx.Done()
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m.client.Disconnect(1000)
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log.Println("mqtt: disconnected")
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}
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func (m *MqttManager) handleConfigUpdate(c mqtt.Client, msg mqtt.Message) {
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log.Printf("mqtt: received config update on %s", msg.Topic())
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var newCfg map[string]interface{}
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if err := json.Unmarshal(msg.Payload(), &newCfg); err != nil {
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log.Printf("mqtt: config parse error: %v", err)
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return
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}
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// Update local config struct
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if v, ok := newCfg["infer_fps"].(float64); ok {
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m.cfg.InferFPS = int(v)
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}
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if v, ok := newCfg["conf_threshold"].(float64); ok {
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m.cfg.ConfThreshold = v
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}
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if v, ok := newCfg["infer_workers"].(float64); ok {
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m.cfg.InferWorkers = int(v)
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}
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if v, ok := newCfg["rtsp_urls"]; ok {
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if urls, ok := v.([]interface{}); ok {
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var s []string
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for _, u := range urls {
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if str, ok := u.(string); ok {
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s = append(s, str)
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}
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}
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m.cfg.RTSPURLs = s
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}
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}
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// Save to disk
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if err := m.cfg.Save(); err != nil {
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log.Printf("mqtt: failed to save config: %v", err)
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} else {
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log.Println("mqtt: config saved to disk")
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}
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// Broadcast update to other components
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select {
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case m.updates <- m.cfg:
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default:
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log.Println("mqtt: update channel full, dropping update")
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}
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}
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func (m *MqttManager) GetUpdates() <-chan *config.Config {
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return m.updates
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}
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func (m *MqttManager) Publish(topic string, payload interface{}) {
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if m.client == nil || !m.client.IsConnected() {
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return
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}
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data, _ := json.Marshal(payload)
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m.client.Publish(topic, 1, false, data)
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}
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