80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
package common
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import (
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"crypto/tls"
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"io"
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"net/smtp"
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"strconv"
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"strings"
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"github.com/jordan-wright/email"
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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"`
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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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}
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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 string, htmlBody string, receivers []string, attachments []MailAttachment) error {
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e := email.NewEmail()
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hostname := cfg.Host + ":" + strconv.Itoa(cfg.Port)
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subject = strings.Trim(subject, "\n\r\t")
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sender = strings.Trim(sender, "\n\r\t")
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replyTo = strings.Trim(replyTo, "\n\r\t")
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if replyTo == "" {
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replyTo = sender
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}
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var auth smtp.Auth
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if cfg.Username == "" {
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auth = nil
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} else {
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// Set up authentication information.
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auth = smtp.PlainAuth(
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"",
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cfg.Username,
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cfg.Password,
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cfg.Host,
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)
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}
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// Set email data.
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e.From = sender
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e.To = receivers
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e.ReplyTo = []string{replyTo}
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e.Subject = subject
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e.Text = []byte(body)
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if htmlBody != "" {
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e.HTML = []byte(htmlBody)
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}
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for _, attachment := range attachments {
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a, err := e.Attach(attachment.Data, attachment.Name, attachment.ContentType)
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if err != nil {
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return err
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}
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if attachment.Embedded {
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a.HTMLRelated = true
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}
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}
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if cfg.TLS {
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return e.SendWithStartTLS(hostname, auth, &tls.Config{InsecureSkipVerify: !cfg.CertValidation})
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} else {
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return e.Send(hostname, auth)
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}
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}
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