mirror of
https://github.com/grafana/grafana.git
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c68eefd398
* Add abstraction layer above SMTP communication * Fix issues with attachments and sync command * Tests for bad SMTP behavior * Separate tests between async and sync entry points. Test difference between them * Return interface so Wire can properly map types * Address feedback from George
147 lines
3.4 KiB
Go
147 lines
3.4 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package notifications
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import (
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"bytes"
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"fmt"
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"html/template"
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"net/mail"
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"github.com/grafana/grafana/pkg/models"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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)
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var (
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emailsSentTotal prometheus.Counter
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emailsSentFailed prometheus.Counter
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)
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func init() {
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emailsSentTotal = promauto.NewCounter(prometheus.CounterOpts{
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Name: "emails_sent_total",
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Help: "Number of emails sent by Grafana",
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Namespace: "grafana",
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})
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emailsSentFailed = promauto.NewCounter(prometheus.CounterOpts{
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Name: "emails_sent_failed",
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Help: "Number of emails Grafana failed to send",
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Namespace: "grafana",
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})
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}
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type Mailer interface {
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Send(messages ...*Message) (int, error)
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}
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func (ns *NotificationService) Send(msg *Message) (int, error) {
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messages := []*Message{}
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if msg.SingleEmail {
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messages = append(messages, msg)
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} else {
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for _, address := range msg.To {
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copy := *msg
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copy.To = []string{address}
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messages = append(messages, ©)
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}
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}
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return ns.mailer.Send(messages...)
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}
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func (ns *NotificationService) buildEmailMessage(cmd *models.SendEmailCommand) (*Message, error) {
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if !ns.Cfg.Smtp.Enabled {
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return nil, models.ErrSmtpNotEnabled
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}
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data := cmd.Data
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if data == nil {
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data = make(map[string]interface{}, 10)
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}
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setDefaultTemplateData(ns.Cfg, data, nil)
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body := make(map[string]string)
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for _, contentType := range ns.Cfg.Smtp.ContentTypes {
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fileExtension, err := getFileExtensionByContentType(contentType)
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if err != nil {
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return nil, err
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}
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var buffer bytes.Buffer
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err = mailTemplates.ExecuteTemplate(&buffer, cmd.Template+fileExtension, data)
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if err != nil {
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return nil, err
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}
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body[contentType] = buffer.String()
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}
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subject := cmd.Subject
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if cmd.Subject == "" {
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var subjectText interface{}
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subjectData := data["Subject"].(map[string]interface{})
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subjectText, hasSubject := subjectData["value"]
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if !hasSubject {
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return nil, fmt.Errorf("missing subject in template %s", cmd.Template)
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}
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subjectTmpl, err := template.New("subject").Parse(subjectText.(string))
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if err != nil {
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return nil, err
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}
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var subjectBuffer bytes.Buffer
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err = subjectTmpl.ExecuteTemplate(&subjectBuffer, "subject", data)
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if err != nil {
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return nil, err
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}
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subject = subjectBuffer.String()
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}
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addr := mail.Address{Name: ns.Cfg.Smtp.FromName, Address: ns.Cfg.Smtp.FromAddress}
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return &Message{
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To: cmd.To,
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SingleEmail: cmd.SingleEmail,
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From: addr.String(),
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Subject: subject,
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Body: body,
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EmbeddedFiles: cmd.EmbeddedFiles,
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AttachedFiles: buildAttachedFiles(cmd.AttachedFiles),
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ReplyTo: cmd.ReplyTo,
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}, nil
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}
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// buildAttachedFiles build attached files
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func buildAttachedFiles(
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attached []*models.SendEmailAttachFile,
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) []*AttachedFile {
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result := make([]*AttachedFile, 0)
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for _, file := range attached {
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result = append(result, &AttachedFile{
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Name: file.Name,
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Content: file.Content,
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})
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}
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return result
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}
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func getFileExtensionByContentType(contentType string) (string, error) {
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switch contentType {
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case "text/html":
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return ".html", nil
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case "text/plain":
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return ".txt", nil
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default:
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return "", fmt.Errorf("unrecognized content type %q", contentType)
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}
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}
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