Initial commit

backend/pkgs/mailer/mailer.go

@@ -0,0 +1,51 @@
+package mailer
+
+import (
+	"encoding/base64"
+	"fmt"
+	"mime"
+	"net/smtp"
+	"strconv"
+)
+
+type Mailer struct {
+	Host     string `json:"host,omitempty"`
+	Port     int    `json:"port,omitempty"`
+	Username string `json:"username,omitempty"`
+	Password string `json:"password,omitempty"`
+	From     string `json:"from,omitempty"`
+}
+
+func (m *Mailer) Ready() bool {
+	return m.Host != "" && m.Port != 0 && m.Username != "" && m.Password != "" && m.From != ""
+}
+
+func (m *Mailer) server() string {
+	return m.Host + ":" + strconv.Itoa(m.Port)
+}
+
+func (m *Mailer) Send(msg *Message) error {
+	server := m.server()
+
+	header := make(map[string]string)
+	header["From"] = msg.From.String()
+	header["To"] = msg.To.String()
+	header["Subject"] = mime.QEncoding.Encode("UTF-8", msg.Subject)
+	header["MIME-Version"] = "1.0"
+	header["Content-Type"] = "text/html; charset=\"utf-8\""
+	header["Content-Transfer-Encoding"] = "base64"
+
+	message := ""
+	for k, v := range header {
+		message += fmt.Sprintf("%s: %s\r\n", k, v)
+	}
+	message += "\r\n" + base64.StdEncoding.EncodeToString([]byte(msg.Body))
+
+	return smtp.SendMail(
+		server,
+		smtp.PlainAuth("", m.Username, m.Password, m.Host),
+		m.From,
+		[]string{msg.To.Address},
+		[]byte(message),
+	)
+}