/
email.go
80 lines (70 loc) · 2.15 KB
/
email.go
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//
// Copyright © 2019 Lispy Snake, Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package license
import (
"bytes"
"fmt"
"html/template"
"net/smtp"
"strings"
)
type emailTemplate struct {
LicenseDescription string
LicenseKey string
LicenseID string
AccountID string
}
// Email is used to render and send HTML emails in batch
type Email struct {
req *AssignRequest
info *Info // Associated license info.
rendered *bytes.Buffer
}
// NewEmail will create a new email for the given assignment
func NewEmail(req *AssignRequest, info *Info) (*Email, error) {
templ := template.New("email_template.html")
t, err := templ.ParseFiles("email_template.html")
if err != nil {
return nil, err
}
tr := &emailTemplate{
LicenseDescription: info.Description,
LicenseID: req.LicenseID,
AccountID: req.AccountID,
LicenseKey: req.UUID,
}
b := &bytes.Buffer{}
if err = t.Execute(b, tr); err != nil {
return nil, err
}
return &Email{
info: info,
rendered: b,
}, nil
}
// Send will use the configuration to send an email.
func (e *Email) Send(config *Config, from string, to []string) error {
txt := fmt.Sprintf("From: %v\r\n", from)
txt += fmt.Sprintf("To: %v\r\n", strings.Join(to, ", "))
txt += "Subject: Lispy Snake Ltd License\r\n"
txt += "MIME-version: 1.0\r\n"
txt += "Content-Type: text/html; charset=\"UTF-8\";\r\n\r\n"
txt += e.rendered.String()
auth := smtp.PlainAuth("", from, config.Email.SMTPPass, config.Email.SMTPHost)
addr := fmt.Sprintf("%s:%v", config.Email.SMTPHost, config.Email.SMTPPort)
err := smtp.SendMail(addr, auth, from, to, []byte(txt))
return err
}