mirror of
https://github.com/h44z/wg-portal
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117 lines
3.2 KiB
Go
117 lines
3.2 KiB
Go
package common
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import (
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"crypto/tls"
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"io"
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"time"
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"github.com/pkg/errors"
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mail "github.com/xhit/go-simple-mail/v2"
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)
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type MailEncryption string
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const (
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MailEncryptionNone MailEncryption = "none"
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MailEncryptionTLS MailEncryption = "tls"
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MailEncryptionStartTLS MailEncryption = "starttls"
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)
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type MailAuthType string
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const (
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MailAuthPlain MailAuthType = "plain"
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MailAuthLogin MailAuthType = "login"
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MailAuthCramMD5 MailAuthType = "crammd5"
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)
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type MailConfig struct {
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Host string `yaml:"host" envconfig:"EMAIL_HOST"`
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Port int `yaml:"port" envconfig:"EMAIL_PORT"`
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TLS bool `yaml:"tls" envconfig:"EMAIL_TLS"` // Deprecated, use MailConfig.Encryption instead.
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Encryption MailEncryption `yaml:"encryption" envconfig:"EMAIL_ENCRYPTION"`
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CertValidation bool `yaml:"certcheck" envconfig:"EMAIL_CERT_VALIDATION"`
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Username string `yaml:"user" envconfig:"EMAIL_USERNAME"`
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Password string `yaml:"pass" envconfig:"EMAIL_PASSWORD"`
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AuthType MailAuthType `yaml:"auth" envconfig:"EMAIL_AUTHTYPE"`
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}
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type MailAttachment struct {
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Name string
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ContentType string
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Data io.Reader
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Embedded bool
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}
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// SendEmailWithAttachments sends a mail with optional attachments.
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func SendEmailWithAttachments(cfg MailConfig, sender, replyTo, subject, body, htmlBody string, receivers []string, attachments []MailAttachment) error {
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srv := mail.NewSMTPClient()
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srv.ConnectTimeout = 30 * time.Second
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srv.SendTimeout = 30 * time.Second
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srv.Host = cfg.Host
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srv.Port = cfg.Port
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srv.Username = cfg.Username
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srv.Password = cfg.Password
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// TODO: remove this once the deprecated MailConfig.TLS config option has been removed
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if cfg.TLS {
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cfg.Encryption = MailEncryptionStartTLS
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}
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switch cfg.Encryption {
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case MailEncryptionTLS:
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srv.Encryption = mail.EncryptionSSLTLS
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case MailEncryptionStartTLS:
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srv.Encryption = mail.EncryptionSTARTTLS
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default: // MailEncryptionNone
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srv.Encryption = mail.EncryptionNone
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}
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srv.TLSConfig = &tls.Config{ServerName: srv.Host, InsecureSkipVerify: !cfg.CertValidation}
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switch cfg.AuthType {
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case MailAuthPlain:
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srv.Authentication = mail.AuthPlain
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case MailAuthLogin:
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srv.Authentication = mail.AuthLogin
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case MailAuthCramMD5:
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srv.Authentication = mail.AuthCRAMMD5
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}
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client, err := srv.Connect()
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if err != nil {
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return errors.Wrap(err, "failed to connect via SMTP")
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}
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if replyTo == "" {
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replyTo = sender
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}
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email := mail.NewMSG()
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email.SetFrom(sender).
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AddTo(receivers...).
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SetReplyTo(replyTo).
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SetSubject(subject)
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email.SetBody(mail.TextHTML, htmlBody)
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email.AddAlternative(mail.TextPlain, body)
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for _, attachment := range attachments {
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attachmentData, err := io.ReadAll(attachment.Data)
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if err != nil {
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return errors.Wrapf(err, "failed to read attachment data for %s", attachment.Name)
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}
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if attachment.Embedded {
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email.AddInlineData(attachmentData, attachment.Name, attachment.ContentType)
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} else {
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email.AddAttachmentData(attachmentData, attachment.Name, attachment.ContentType)
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}
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}
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// Call Send and pass the client
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err = email.Send(client)
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if err != nil {
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return errors.Wrapf(err, "failed to send email")
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}
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return nil
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}
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