graphicek/server/integrations/telegram.go

package integrations

import (
	"encoding/json"
	"fmt"
	"strings"

	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
)

type TelegramIntegration struct{}

type TelegramNotificationChannelConfig struct {
	Id            int64  `json:"id"`
	ApiKey        string `json:"apiKey"`
	TargetChannel int64  `json:"targetChannel"`
}

func (s TelegramIntegration) ProcessEvent(evt *ContactPointEvent, rawConfig string) error {
	config := TelegramNotificationChannelConfig{}
	err := json.Unmarshal([]byte(rawConfig), &config)

	if err != nil {
		return fmt.Errorf("failed to parse telegram integration config - %w", err)
	}

	bot, err := tgbotapi.NewBotAPI(config.ApiKey)

	if err != nil {
		return err
	}

	switch evt.Type {
	case ContactPointEventAlertTriggered:
		data := evt.AlertTriggeredEvent

		text := fmt.Sprintf("🚨 %s is at {value}", data.SensorName)
		if data.CustomMessage != "" {
			text = data.CustomMessage
		}

		text = strings.Replace(text, "{value}", data.AlertValue, -1)

		msg := tgbotapi.NewMessage(config.TargetChannel, text)
		msg.ParseMode = "Markdown"
		_, err = bot.Send(msg)
		return err
	}

	/*
		cameraUrl := ""

		if event != nil {
			cameraUrl = fmt.Sprintf("%s/#/cameras/%d", evt.AppConfig.PublicUrl, event.CameraId)
		}

		switch evt.Type {
		case ChannelEventTest:
			msg := tgbotapi.NewMessage(config.TargetChannel, "👋 Test message")
			_, err = bot.Send(msg)
			return err

		case ChannelEventMotionStart:
			msg := tgbotapi.NewMessage(config.TargetChannel, fmt.Sprintf("👁 **Motion detected** by %s. [Go to stream](%s)", camera.Name, cameraUrl))
			msg.ParseMode = "Markdown"
			_, err = bot.Send(msg)
			return err

		case ChannelEventCameraLost:
			msg := tgbotapi.NewMessage(config.TargetChannel, fmt.Sprintf("🔴 Connection to camera %s **lost**. [Go to camera](%s)", camera.Name, cameraUrl))
			msg.ParseMode = "Markdown"
			_, err = bot.Send(msg)
			return err

		case ChannelEventCameraFound:
			msg := tgbotapi.NewMessage(config.TargetChannel, fmt.Sprintf("🟢 Connection to camera %s **re-established**. [Go to camera](%s)", camera.Name, cameraUrl))
			msg.ParseMode = "Markdown"
			_, err = bot.Send(msg)
			return err

		case ChannelEventPreview:
			if !event.Preview.Valid {
				return nil
			}

			reader, err := os.Open(event.Preview.String)

			if err != nil {
				return fmt.Errorf("failed to open preview file - %w", err)
			}

			file := tgbotapi.FileReader{
				Name:   event.Preview.String,
				Reader: reader,
			}

			previewMsg := tgbotapi.NewVideo(config.TargetChannel, file)
			// previewMsg.Caption = fmt.Sprintf("Captured by %s", camera.Name)
			_, err = bot.Send(previewMsg)

			if err != nil {
				return err
			}

		case ChannelEventMovie:
			if !event.Movie.Valid {
				return nil
			}

			reader, err := os.Open(event.Movie.String)

			if err != nil {
				return err
			}

			videoFile := tgbotapi.FileReader{
				Name:   event.Movie.String,
				Reader: reader,
			}

			msg := tgbotapi.NewVideo(config.TargetChannel, videoFile)
			// msg.Caption = fmt.Sprintf("Captured by %s", camera.Name)
			_, err = bot.Send(msg)

			return err

		case ChannelEventPicture:
			if !event.Picture.Valid {
				return nil
			}

			reader, err := os.Open(event.Picture.String)

			if err != nil {
				return err
			}

			videoFile := tgbotapi.FileReader{
				Name:   event.Movie.String,
				Reader: reader,
			}

			msg := tgbotapi.NewPhoto(config.TargetChannel, videoFile)
			msg.Caption = fmt.Sprintf(`Captured by %s`, camera.Name)

			_, err = bot.Send(msg)

			return err
		}
	*/

	return nil
}

func (s TelegramIntegration) ValidateConfig(rawConfig string) error {
	config := TelegramNotificationChannelConfig{}
	return json.Unmarshal([]byte(rawConfig), &config)
}