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telegram.go
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telegram.go
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package notification
import (
"bytes"
"crypto/tls"
"encoding/json"
"fmt"
"github.com/SyncYomi/SyncYomi/internal/domain"
"github.com/SyncYomi/SyncYomi/pkg/errors"
"github.com/rs/zerolog"
"html"
"io"
"net/http"
"time"
)
type TelegramMessage struct {
ChatID string `json:"chat_id"`
Text string `json:"text"`
ParseMode string `json:"parse_mode"`
}
type telegramSender struct {
log zerolog.Logger
Settings domain.Notification
}
func NewTelegramSender(log zerolog.Logger, settings domain.Notification) domain.NotificationSender {
return &telegramSender{
log: log.With().Str("sender", "telegram").Logger(),
Settings: settings,
}
}
func (s *telegramSender) Send(event domain.NotificationEvent, payload domain.NotificationPayload) error {
m := TelegramMessage{
ChatID: s.Settings.Channel,
Text: s.buildMessage(event, payload),
ParseMode: "HTML",
//ParseMode: "MarkdownV2",
}
jsonData, err := json.Marshal(m)
if err != nil {
s.log.Error().Err(err).Msgf("telegram client could not marshal data: %v", m)
return errors.Wrap(err, "could not marshal data: %+v", m)
}
url := fmt.Sprintf("https://api.telegram.org/bot%v/sendMessage", s.Settings.Token)
req, err := http.NewRequest(http.MethodPost, url, bytes.NewBuffer(jsonData))
if err != nil {
s.log.Error().Err(err).Msgf("telegram client request error: %v", event)
return errors.Wrap(err, "could not create request")
}
req.Header.Set("Content-Type", "application/json")
t := &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}
client := http.Client{Transport: t, Timeout: 30 * time.Second}
res, err := client.Do(req)
if err != nil {
s.log.Error().Err(err).Msgf("telegram client request error: %v", event)
return errors.Wrap(err, "could not make request: %+v", req)
}
body, err := io.ReadAll(res.Body)
if err != nil {
s.log.Error().Err(err).Msgf("telegram client request error: %v", event)
return errors.Wrap(err, "could not read data")
}
defer func(Body io.ReadCloser) {
err := Body.Close()
if err != nil {
s.log.Error().Msgf("telegram client could not close body: %v", err)
}
}(res.Body)
s.log.Trace().Msgf("telegram status: %v response: %v", res.StatusCode, string(body))
if res.StatusCode != http.StatusOK {
s.log.Error().Err(err).Msgf("telegram client request error: %v", string(body))
return errors.New("bad status: %v body: %v", res.StatusCode, string(body))
}
s.log.Debug().Msg("notification successfully sent to telegram")
return nil
}
func (s *telegramSender) CanSend(event domain.NotificationEvent) bool {
if s.isEnabled() && s.isEnabledEvent(event) {
return true
}
return false
}
func (s *telegramSender) isEnabled() bool {
if s.Settings.Enabled && s.Settings.Token != "" && s.Settings.Channel != "" {
return true
}
return false
}
func (s *telegramSender) isEnabledEvent(event domain.NotificationEvent) bool {
for _, e := range s.Settings.Events {
if e == string(event) {
return true
}
}
return false
}
func (s *telegramSender) buildMessage(event domain.NotificationEvent, payload domain.NotificationPayload) string {
msg := ""
if payload.Subject != "" && payload.Message != "" {
msg += fmt.Sprintf("%v\n<b>%v</b>", payload.Subject, html.EscapeString(payload.Message))
}
return msg
}