mirror of
https://github.com/jwetzell/showbridge-go.git
synced 2026-04-26 12:55:29 +00:00
132 lines
2.9 KiB
Go
132 lines
2.9 KiB
Go
package module
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import (
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"context"
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"errors"
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"fmt"
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"log/slog"
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mqtt "github.com/eclipse/paho.mqtt.golang"
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"github.com/jwetzell/showbridge-go/internal/common"
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"github.com/jwetzell/showbridge-go/internal/config"
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)
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type MQTTClient struct {
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config config.ModuleConfig
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ctx context.Context
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router common.RouteIO
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Broker string
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ClientID string
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Topic string
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client mqtt.Client
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logger *slog.Logger
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cancel context.CancelFunc
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}
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func init() {
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RegisterModule(ModuleRegistration{
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Type: "mqtt.client",
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New: func(config config.ModuleConfig) (common.Module, error) {
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params := config.Params
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brokerString, err := params.GetString("broker")
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if err != nil {
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return nil, fmt.Errorf("mqtt.client broker error: %w", err)
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}
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topicString, err := params.GetString("topic")
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if err != nil {
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return nil, fmt.Errorf("mqtt.client topic error: %w", err)
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}
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clientIdString, err := params.GetString("clientId")
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if err != nil {
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return nil, fmt.Errorf("mqtt.client clientId error: %w", err)
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}
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return &MQTTClient{config: config, Broker: brokerString, Topic: topicString, ClientID: clientIdString, logger: CreateLogger(config)}, nil
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},
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})
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}
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func (mc *MQTTClient) Id() string {
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return mc.config.Id
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}
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func (mc *MQTTClient) Type() string {
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return mc.config.Type
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}
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func (mc *MQTTClient) Start(ctx context.Context) error {
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mc.logger.Debug("running")
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router, ok := ctx.Value(common.RouterContextKey).(common.RouteIO)
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if !ok {
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return errors.New("mqtt.client unable to get router from context")
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}
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mc.router = router
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moduleContext, cancel := context.WithCancel(ctx)
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mc.ctx = moduleContext
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mc.cancel = cancel
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opts := mqtt.NewClientOptions()
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opts.AddBroker(mc.Broker)
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opts.SetClientID(mc.ClientID)
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opts.SetAutoReconnect(true)
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opts.SetCleanSession(false)
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opts.OnConnect = func(c mqtt.Client) {
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token := mc.client.Subscribe(mc.Topic, 1, func(c mqtt.Client, m mqtt.Message) {
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mc.router.HandleInput(mc.ctx, mc.Id(), m)
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})
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token.Wait()
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}
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mc.client = mqtt.NewClient(opts)
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defer mc.client.Disconnect(250)
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token := mc.client.Connect()
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token.Wait()
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err := token.Error()
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if err != nil {
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return err
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}
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<-mc.ctx.Done()
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mc.logger.Debug("done")
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return nil
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}
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func (mc *MQTTClient) Output(ctx context.Context, payload any) error {
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payloadMessage, ok := common.GetAnyAs[mqtt.Message](payload)
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if !ok {
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return errors.New("mqtt.client is only able to output a MQTTMessage")
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}
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if mc.client == nil {
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return errors.New("mqtt.client client is not setup")
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}
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if !mc.client.IsConnected() {
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return errors.New("mqtt.client is not connected")
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}
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token := mc.client.Publish(payloadMessage.Topic(), payloadMessage.Qos(), payloadMessage.Retained(), payloadMessage.Payload())
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token.Wait()
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return token.Error()
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}
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func (mc *MQTTClient) Stop() {
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mc.cancel()
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}
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func (mc *MQTTClient) Get(key string) (any, error) {
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return nil, errors.New("mqtt.client does not support Get")
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}
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