2021-02-07 22:05:09 +01:00
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// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-2021 Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public Licensee as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public Licensee for more details.
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//
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// You should have received a copy of the GNU Affero General Public Licensee
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package notifications
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import (
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"bytes"
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"embed"
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_ "embed"
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templatehtml "html/template"
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templatetext "text/template"
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"code.vikunja.io/api/pkg/config"
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"code.vikunja.io/api/pkg/mail"
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"code.vikunja.io/api/pkg/utils"
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2021-04-18 15:32:02 +02:00
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"github.com/yuin/goldmark"
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)
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const mailTemplatePlain = `
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{{ .Greeting }}
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{{ range $line := .IntroLines}}
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{{ $line }}
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{{ end }}
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{{ if .ActionURL }}{{ .ActionText }}:
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{{ .ActionURL }}{{end}}
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{{ range $line := .OutroLines}}
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{{ $line }}
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{{ end }}`
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const mailTemplateHTML = `
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<!doctype html>
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<html style="width: 100%; height: 100%; padding: 0; margin: 0;">
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<head>
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<meta name="viewport" content="width: display-width;">
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</head>
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<body style="width: 100%; padding: 0; margin: 0; background: #f3f4f6">
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<div style="width: 100%; font-family: 'Open Sans', sans-serif; text-rendering: optimizeLegibility">
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<div style="width: 600px; margin: 0 auto; text-align: justify;">
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<h1 style="font-size: 30px; text-align: center;">
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<img src="cid:logo.png" style="height: 75px;" alt="Vikunja"/>
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</h1>
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<div style="border: 1px solid #dbdbdb; -webkit-box-shadow: 0.3em 0.3em 0.8em #e6e6e6; box-shadow: 0.3em 0.3em 0.8em #e6e6e6; color: #4a4a4a; padding: 5px 25px; border-radius: 3px; background: #fff;">
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<p>
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{{ .Greeting }}
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</p>
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{{ range $line := .IntroLinesHTML}}
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{{ $line }}
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{{ end }}
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{{ if .ActionURL }}
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<a href="{{ .ActionURL }}" title="{{ .ActionText }}"
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style="position: relative;text-decoration:none;display: block;border-radius: 4px;cursor: pointer;padding-bottom: 8px;padding-left: 14px;padding-right: 14px;padding-top: 8px;width:280px;margin:10px auto;text-align: center;white-space: nowrap;border: 0;text-transform: uppercase;font-size: 14px;font-weight: 700;-webkit-box-shadow: 0 3px 6px rgba(107,114,128,.12),0 2px 4px rgba(107,114,128,.1);box-shadow: 0 3px 6px rgba(107,114,128,.12),0 2px 4px rgba(107,114,128,.1);background-color: #1973ff;border-color: transparent;color: #fff;">
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{{ .ActionText }}
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</a>
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{{end}}
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{{ range $line := .OutroLinesHTML}}
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{{ $line }}
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{{ end }}
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{{ if .ActionURL }}
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<p style="color: #9CA3AF;font-size:12px;border-top: 1px solid #dbdbdb;margin-top:20px;padding-top:20px;">
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If the button above doesn't work, copy the url below and paste it in your browsers address bar:<br/>
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{{ .ActionURL }}
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</p>
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{{ end }}
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</div>
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</div>
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</div>
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</body>
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</html>
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`
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//go:embed logo.png
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var logo embed.FS
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// RenderMail takes a precomposed mail message and renders it into a ready to send mail.Opts object
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func RenderMail(m *Mail) (mailOpts *mail.Opts, err error) {
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var htmlContent bytes.Buffer
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var plainContent bytes.Buffer
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plain, err := templatetext.New("mail-plain").Parse(mailTemplatePlain)
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if err != nil {
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return nil, err
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}
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html, err := templatehtml.New("mail-plain").Parse(mailTemplateHTML)
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if err != nil {
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return nil, err
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}
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boundary := "np" + utils.MakeRandomString(13)
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data := make(map[string]interface{})
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data["Greeting"] = m.greeting
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data["IntroLines"] = m.introLines
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data["OutroLines"] = m.outroLines
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data["ActionText"] = m.actionText
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data["ActionURL"] = m.actionURL
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data["Boundary"] = boundary
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data["FrontendURL"] = config.ServiceFrontendurl.GetString()
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var introLinesHTML []templatehtml.HTML
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for _, line := range m.introLines {
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md := []byte(templatehtml.HTMLEscapeString(line))
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var buf bytes.Buffer
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err = goldmark.Convert(md, &buf)
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if err != nil {
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return nil, err
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}
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//#nosec - the html is escaped few lines before
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introLinesHTML = append(introLinesHTML, templatehtml.HTML(buf.String()))
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}
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data["IntroLinesHTML"] = introLinesHTML
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var outroLinesHTML []templatehtml.HTML
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for _, line := range m.outroLines {
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md := []byte(templatehtml.HTMLEscapeString(line))
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var buf bytes.Buffer
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err = goldmark.Convert(md, &buf)
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if err != nil {
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return nil, err
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}
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//#nosec - the html is escaped few lines before
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outroLinesHTML = append(outroLinesHTML, templatehtml.HTML(buf.String()))
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}
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data["OutroLinesHTML"] = outroLinesHTML
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err = plain.Execute(&plainContent, data)
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if err != nil {
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return nil, err
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}
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err = html.Execute(&htmlContent, data)
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if err != nil {
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return nil, err
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}
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mailOpts = &mail.Opts{
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From: m.from,
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To: m.to,
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Subject: m.subject,
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ContentType: mail.ContentTypeMultipart,
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Message: plainContent.String(),
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HTMLMessage: htmlContent.String(),
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Boundary: boundary,
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EmbedFS: map[string]*embed.FS{
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"logo.png": &logo,
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},
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}
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return mailOpts, nil
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}
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