119 lines
2.9 KiB
Go
119 lines
2.9 KiB
Go
package server
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import (
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_ "embed" // required by go:embed
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"encoding/json"
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"fmt"
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"heckel.io/ntfy/util"
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"mime"
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"net"
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"net/smtp"
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"strings"
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"time"
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)
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type mailer interface {
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Send(from, to string, m *message) error
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}
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type smtpMailer struct {
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config *Config
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}
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func (s *smtpMailer) Send(senderIP, to string, m *message) error {
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host, _, err := net.SplitHostPort(s.config.SMTPAddr)
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if err != nil {
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return err
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}
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message, err := formatMail(s.config.BaseURL, senderIP, s.config.SMTPFrom, to, m)
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if err != nil {
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return err
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}
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auth := smtp.PlainAuth("", s.config.SMTPUser, s.config.SMTPPass, host)
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return smtp.SendMail(s.config.SMTPAddr, auth, s.config.SMTPFrom, []string{to}, []byte(message))
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}
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func formatMail(baseURL, senderIP, from, to string, m *message) (string, error) {
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topicURL := baseURL + "/" + m.Topic
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subject := m.Title
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if subject == "" {
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subject = m.Message
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}
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subject = strings.ReplaceAll(strings.ReplaceAll(subject, "\r", ""), "\n", " ")
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message := m.Message
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trailer := ""
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if len(m.Tags) > 0 {
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emojis, tags, err := toEmojis(m.Tags)
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if err != nil {
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return "", err
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}
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if len(emojis) > 0 {
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subject = strings.Join(emojis, " ") + " " + subject
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}
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if len(tags) > 0 {
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trailer = "Tags: " + strings.Join(tags, ", ")
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}
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}
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if m.Priority != 0 && m.Priority != 3 {
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priority, err := util.PriorityString(m.Priority)
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if err != nil {
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return "", err
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}
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if trailer != "" {
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trailer += "\n"
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}
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trailer += fmt.Sprintf("Priority: %s", priority)
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}
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if trailer != "" {
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message += "\n\n" + trailer
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}
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subject = mime.BEncoding.Encode("utf-8", subject)
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body := `From: "{shortTopicURL}" <{from}>
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To: {to}
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Subject: {subject}
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Content-Type: text/plain; charset="utf-8"
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{message}
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--
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This message was sent by {ip} at {time} via {topicURL}`
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body = strings.ReplaceAll(body, "{from}", from)
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body = strings.ReplaceAll(body, "{to}", to)
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body = strings.ReplaceAll(body, "{subject}", subject)
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body = strings.ReplaceAll(body, "{message}", message)
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body = strings.ReplaceAll(body, "{topicURL}", topicURL)
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body = strings.ReplaceAll(body, "{shortTopicURL}", util.ShortTopicURL(topicURL))
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body = strings.ReplaceAll(body, "{time}", time.Unix(m.Time, 0).UTC().Format(time.RFC1123))
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body = strings.ReplaceAll(body, "{ip}", senderIP)
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return body, nil
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}
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var (
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//go:embed "mailer_emoji.json"
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emojisJSON string
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)
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type emoji struct {
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Emoji string `json:"emoji"`
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Aliases []string `json:"aliases"`
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}
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func toEmojis(tags []string) (emojisOut []string, tagsOut []string, err error) {
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var emojis []emoji
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if err = json.Unmarshal([]byte(emojisJSON), &emojis); err != nil {
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return nil, nil, err
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}
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tagsOut = make([]string, 0)
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emojisOut = make([]string, 0)
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nextTag:
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for _, t := range tags { // TODO Super inefficient; we should just create a .json file with a map
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for _, e := range emojis {
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if util.InStringList(e.Aliases, t) {
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emojisOut = append(emojisOut, e.Emoji)
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continue nextTag
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}
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}
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tagsOut = append(tagsOut, t)
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}
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return
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}
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