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email.go
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email.go
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// Copyright 2018-2023 CERN
//
// 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.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package sciencemesh
import (
"bytes"
"html/template"
"io"
"os"
userpb "github.com/cs3org/go-cs3apis/cs3/identity/user/v1beta1"
)
type emailParams struct {
User *userpb.User
Token string
MeshDirectoryURL string
InviteLink string
}
const defaultSubject = `ScienceMesh: {{.User.DisplayName}} wants to collaborate with you`
const defaultBody = `Hi
{{.User.DisplayName}} ({{.User.Mail}}) wants to start sharing OCM resources with you.
To accept the invite, please visit the following URL:
{{.InviteLink}}
Alternatively, you can visit your mesh provider and use the following details:
Token: {{.Token}}
ProviderDomain: {{.User.Id.Idp}}
Best,
The ScienceMesh team`
func (h *tokenHandler) sendEmail(recipient string, obj *emailParams) error {
subj, err := h.generateEmailSubject(obj)
if err != nil {
return err
}
body, err := h.generateEmailBody(obj)
if err != nil {
return err
}
return h.smtpCredentials.SendMail(recipient, subj, body)
}
func (h *tokenHandler) generateEmailSubject(obj *emailParams) (string, error) {
var buf bytes.Buffer
err := h.tplSubj.Execute(&buf, obj)
return buf.String(), err
}
func (h *tokenHandler) generateEmailBody(obj *emailParams) (string, error) {
var buf bytes.Buffer
err := h.tplBody.Execute(&buf, obj)
return buf.String(), err
}
func (h *tokenHandler) initBodyTemplate(bodyTemplPath string) error {
var body string
if bodyTemplPath == "" {
body = defaultBody
} else {
f, err := os.Open(bodyTemplPath)
if err != nil {
return err
}
defer f.Close()
data, err := io.ReadAll(f)
if err != nil {
return err
}
body = string(data)
}
tpl, err := template.New("tpl_body").Parse(body)
if err != nil {
return err
}
h.tplBody = tpl
return nil
}
func (h *tokenHandler) initSubjectTemplate(subjTempl string) error {
var subj string
if subjTempl == "" {
subj = defaultSubject
} else {
subj = subjTempl
}
tpl, err := template.New("tpl_subj").Parse(subj)
if err != nil {
return err
}
h.tplSubj = tpl
return nil
}