70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
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package vain
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import (
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"bytes"
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"fmt"
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"net/mail"
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"net/smtp"
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)
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// A Mailer is a type that knows how to send smtp mail.
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type Mailer interface {
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Send(to mail.Address, subject, msg string) error
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}
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// NewEmail returns *Email struct to be able to send smtp
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// or an error if it can't correctly parse the email address.
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func NewEmail(from, host string, port int) (*Email, error) {
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if _, err := mail.ParseAddress(from); err != nil {
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return nil, fmt.Errorf("can't parse an email address for 'from': %v", err)
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}
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r := &Email{
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host: host,
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port: port,
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from: from,
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}
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return r, nil
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}
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// Email stores information required to use smtp.
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type Email struct {
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host string
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port int
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from string
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}
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// Send sends a smtp email using the host and port in the Email struct and
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//returns an error if there was a problem sending the email.
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func (e Email) Send(to mail.Address, subject, msg string) error {
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c, err := smtp.Dial(fmt.Sprintf("%s:%d", e.host, e.port))
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if err != nil {
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return fmt.Errorf("couldn't dial mail server: %v", err)
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}
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defer c.Close()
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if err := c.Mail(e.from); err != nil {
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return err
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}
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if err := c.Rcpt(to.String()); err != nil {
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return err
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}
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wc, err := c.Data()
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if err != nil {
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return fmt.Errorf("problem sending mail: %v", err)
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}
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buf := bytes.NewBufferString("Subject: " + subject + "\n\n" + msg)
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buf.WriteTo(wc)
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if err := c.Quit(); err != nil {
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return nil
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}
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return err
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}
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type mockMail struct {
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msg string
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}
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func (m *mockMail) Send(to mail.Address, subject, msg string) error {
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m.msg = msg
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return nil
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}
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