2024-03-01 13:37:01 +05:30

100 lines
3.0 KiB
Go

// The email package contains functions for directly sending emails.
//
// These functions can be used for directly sending emails to given email
// addresses. This is used for transactional emails, for example OTP requests.
// Currently, we use Zoho Transmail to send out the actual mail.
package email
import (
"bytes"
"encoding/json"
"html/template"
"net/http"
"strings"
"github.com/ente-io/museum/ente"
"github.com/ente-io/stacktrace"
log "github.com/sirupsen/logrus"
"github.com/spf13/viper"
)
// Send sends an email
func Send(toEmails []string, fromName string, fromEmail string, subject string, htmlBody string, inlineImages []map[string]interface{}) error {
if len(toEmails) == 0 {
return ente.ErrBadRequest
}
authKey := viper.GetString("transmail.key")
silent := viper.GetBool("internal.silent")
if authKey == "" || silent {
log.Infof("Skipping sending email to %s: %s", toEmails[0], subject)
return nil
}
var to []ente.ToEmailAddress
for _, toEmail := range toEmails {
to = append(to, ente.ToEmailAddress{EmailAddress: ente.EmailAddress{Address: toEmail}})
}
mail := &ente.Mail{
BounceAddress: ente.TransmailEndBounceAddress,
From: ente.EmailAddress{Address: fromEmail, Name: fromName},
Subject: subject,
Htmlbody: htmlBody,
InlineImages: inlineImages,
}
if len(toEmails) == 1 {
mail.To = to
} else {
mail.Bcc = to
}
postBody, err := json.Marshal(mail)
if err != nil {
return stacktrace.Propagate(err, "")
}
reqBody := bytes.NewBuffer(postBody)
client := &http.Client{}
req, err := http.NewRequest("POST", ente.TransmailEndPoint, reqBody)
if err != nil {
return stacktrace.Propagate(err, "")
}
req.Header.Set("accept", "application/json")
req.Header.Set("content-type", "application/json")
req.Header.Set("authorization", authKey)
_, err = client.Do(req)
return stacktrace.Propagate(err, "")
}
func SendTemplatedEmail(to []string, fromName string, fromEmail string, subject string, templateName string, templateData map[string]interface{}, inlineImages []map[string]interface{}) error {
body, err := getMailBody(templateName, templateData)
if err != nil {
return stacktrace.Propagate(err, "")
}
return Send(to, fromName, fromEmail, subject, body, inlineImages)
}
func GetMaskedEmail(email string) string {
at := strings.LastIndex(email, "@")
if at >= 0 {
username, domain := email[:at], email[at+1:]
maskedUsername := ""
for i := 0; i < len(username); i++ {
maskedUsername += "*"
}
return maskedUsername + "@" + domain
} else {
// Should ideally never happen, there should always be an @ symbol
return "[invalid_email]"
}
}
// getMailBody generates the mail html body from provided template and data
func getMailBody(templateName string, templateData map[string]interface{}) (string, error) {
htmlbody := new(bytes.Buffer)
t := template.Must(template.New(templateName).ParseFiles("mail-templates/" + templateName))
err := t.Execute(htmlbody, templateData)
if err != nil {
return "", stacktrace.Propagate(err, "")
}
return htmlbody.String(), nil
}