add signup resolver

server/email/email.go

@@ -0,0 +1,88 @@
+package email
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"mime/quotedprintable"
+	"net/smtp"
+	"strings"
+
+	"github.com/yauthdev/yauth/server/constants"
+)
+
+/**
+	Using: https://github.com/tangingw/go_smtp/blob/master/send_mail.go
+	For gmail add instruction to enable less security
+	// https://myaccount.google.com/u/0/lesssecureapps
+	// https://www.google.com/settings/security/lesssecureapps
+	// https://stackoverflow.com/questions/19877246/nodemailer-with-gmail-and-nodejs
+**/
+
+type Sender struct {
+	User     string
+	Password string
+}
+
+func NewSender() Sender {
+	return Sender{User: constants.SENDER_EMAIL, Password: constants.SENDER_PASSWORD}
+}
+
+func (sender Sender) SendMail(Dest []string, Subject, bodyMessage string) error {
+	msg := "From: " + sender.User + "\n" +
+		"To: " + strings.Join(Dest, ",") + "\n" +
+		"Subject: " + Subject + "\n" + bodyMessage
+
+	err := smtp.SendMail(constants.SMTP_HOST+":"+constants.SMTP_PORT,
+		smtp.PlainAuth("", sender.User, sender.Password, constants.SMTP_HOST),
+		sender.User, Dest, []byte(msg))
+	if err != nil {
+
+		log.Printf("smtp error: %s", err)
+		return err
+	}
+
+	return nil
+}
+
+func (sender Sender) WriteEmail(dest []string, contentType, subject, bodyMessage string) string {
+	header := make(map[string]string)
+	header["From"] = sender.User
+
+	receipient := ""
+
+	for _, user := range dest {
+		receipient = receipient + user
+	}
+
+	header["To"] = receipient
+	header["Subject"] = subject
+	header["MIME-Version"] = "1.0"
+	header["Content-Type"] = fmt.Sprintf("%s; charset=\"utf-8\"", contentType)
+	header["Content-Transfer-Encoding"] = "quoted-printable"
+	header["Content-Disposition"] = "inline"
+
+	message := ""
+
+	for key, value := range header {
+		message += fmt.Sprintf("%s: %s\r\n", key, value)
+	}
+
+	var encodedMessage bytes.Buffer
+
+	finalMessage := quotedprintable.NewWriter(&encodedMessage)
+	finalMessage.Write([]byte(bodyMessage))
+	finalMessage.Close()
+
+	message += "\r\n" + encodedMessage.String()
+
+	return message
+}
+
+func (sender *Sender) WriteHTMLEmail(dest []string, subject, bodyMessage string) string {
+	return sender.WriteEmail(dest, "text/html", subject, bodyMessage)
+}
+
+func (sender *Sender) WritePlainEmail(dest []string, subject, bodyMessage string) string {
+	return sender.WriteEmail(dest, "text/plain", subject, bodyMessage)
+}