| package email |
| |
| import ( |
| "bytes" |
| "encoding/base64" |
| "fmt" |
| "html/template" |
| "strings" |
| |
| "go.skia.org/infra/go/auth" |
| gmail "google.golang.org/api/gmail/v1" |
| ) |
| |
| var ( |
| emailTemplate string = `From: {{.From}} |
| To: {{.To}} |
| Subject: {{.Subject}} |
| Content-Type: text/html |
| |
| <html> |
| {{.Body}} |
| </html> |
| ` |
| emailTemplateParsed *template.Template = nil |
| ) |
| |
| func init() { |
| emailTemplateParsed = template.Must(template.New("email").Parse(emailTemplate)) |
| } |
| |
| // GMail is an object used for authenticating to the GMail API server. |
| type GMail struct { |
| service *gmail.Service |
| } |
| |
| // Message represents a single email message. |
| type Message struct { |
| To []string |
| Subject string |
| Body string |
| } |
| |
| // NewGMail returns a new GMail object which is authorized to send email. |
| func NewGMail(clientId, clientSecret, tokenCacheFile string) (*GMail, error) { |
| client, err := auth.NewClientFromIdAndSecret(clientId, clientSecret, tokenCacheFile, gmail.GmailComposeScope) |
| if err != nil { |
| return nil, err |
| } |
| service, err := gmail.New(client) |
| if err != nil { |
| return nil, err |
| } |
| return &GMail{ |
| service: service, |
| }, nil |
| } |
| |
| // Send an email. |
| func (a *GMail) Send(to []string, subject string, body string) error { |
| user := "me" |
| msgBytes := new(bytes.Buffer) |
| if err := emailTemplateParsed.Execute(msgBytes, struct { |
| From string |
| To string |
| Subject string |
| Body template.HTML |
| }{ |
| From: user, |
| To: strings.Join(to, ","), |
| Subject: subject, |
| Body: template.HTML(body), |
| }); err != nil { |
| return fmt.Errorf("Failed to send email; could not execute template: %v", err) |
| } |
| msg := gmail.Message{} |
| msg.SizeEstimate = int64(msgBytes.Len()) |
| msg.Snippet = subject |
| msg.Raw = base64.URLEncoding.EncodeToString(msgBytes.Bytes()) |
| |
| _, err := a.service.Users.Messages.Send(user, &msg).Do() |
| return err |
| } |
| |
| // SendMessage sends the given Message. |
| func (a *GMail) SendMessage(msg *Message) error { |
| return a.Send(msg.To, msg.Subject, msg.Body) |
| } |
