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` type HtmlTemplate struct { Link string } func SendEmailForgotPassword(dialer *gomail.Dialer, from, to, body string) error { m := gomail.NewMessage() m.SetHeader("From", m.FormatAddress(from, "Pet Backend")) m.SetHeader("To", to) m.SetHeader("Subject", "Hello!") m.SetBody("text/html", body) return dialer.DialAndSend(m) } type Config struct { App struct { LogFile string `yaml:"logFile"` ServiceUrl string `yaml:"serviceUrl"` } Kafka struct { Brokers []string `yaml:"brokers"` Topic string `yaml:"topic"` ConsumerGroupId string `yaml:"consumerGroupId"` } `yaml:"kafka"` SMTP struct { Server string `yaml:"server"` Port int `yaml:"port"` Login string `yaml:"login"` Password string `yaml:"password"` Email string `yaml:"email"` } `yaml:"smtp"` } func main() { ctx := context.Background() configFile, err := os.ReadFile("config.yaml") if err != nil { log.Fatal(err.Error()) } config := &Config{} if err := yaml.Unmarshal(configFile, config); err != nil { log.Fatal(err.Error()) } dialer := gomail.NewDialer(config.SMTP.Server, config.SMTP.Port, config.SMTP.Login, config.SMTP.Password) r := kafka.NewReader(kafka.ReaderConfig{ Brokers: config.Kafka.Brokers, Topic: config.Kafka.Topic, GroupID: config.Kafka.ConsumerGroupId, }) logger, err := logger.New( ctx, logger.NewLoggerOpts{ Debug: true, OutputFile: config.App.LogFile, }, ) if err != nil { log.Fatal(err.Error()) } logger.Printf("coworker service started\n") template, err := template.New("verify-email").Parse(MSG_TEXT) if err != nil { log.Fatal(err) } for { msg, err := r.FetchMessage(ctx) if err == io.EOF { log.Fatal("EOF") return } if err != nil { log.Fatal(err.Error()) return } log.Printf("offset: %d, partition: %d, key: %s, value: %s\n", msg.Offset, msg.Partition, string(msg.Key), string(msg.Value)) if err := r.CommitMessages(ctx, msg); err != nil { log.Fatalf("failed to commit: %s\n", err.Error()) continue } value := struct { Email string `json:"email"` Token string `json:"token"` }{} if err := json.Unmarshal(msg.Value, &value); err != nil { log.Fatalf("failed to unmarshal: %s\n", err.Error()) continue } link := fmt.Sprintf("%s/verify-user?token=%s", config.App.ServiceUrl, value.Token) builder := &strings.Builder{} if err := template.Execute(builder, HtmlTemplate{link}); err != nil { log.Printf("failed to execute html template: %s\n", err.Error()) continue } if err := SendEmailForgotPassword(dialer, config.SMTP.Email, value.Email, builder.String()); err != nil { log.Printf("failed to send email: %s\n", err.Error()) continue } } }