Add notifications package for easy sending of notifications (#779)

Co-authored-by: kolaente <k@knt.li> Reviewed-on: https://kolaente.dev/vikunja/api/pulls/779 Co-authored-by: konrad <konrad@kola-entertainments.de> Co-committed-by: konrad <konrad@kola-entertainments.de>
2021-02-07 21:05:09 +00:00
parent 9fe46f9a61
commit 015ca310e9
32 changed files with 1109 additions and 275 deletions
--- a/pkg/notifications/mail_render.go
+++ b/pkg/notifications/mail_render.go
@ -0,0 +1,137 @@
+// Vikunja is a to-do list application to facilitate your life.
+// Copyright 2018-2021 Vikunja and contributors. All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public Licensee as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public Licensee for more details.
+//
+// You should have received a copy of the GNU Affero General Public Licensee
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package notifications
+
+import (
+	"bytes"
+	templatehtml "html/template"
+	templatetext "text/template"
+
+	"code.vikunja.io/api/pkg/config"
+	"code.vikunja.io/api/pkg/mail"
+	"code.vikunja.io/api/pkg/utils"
+)
+
+const mailTemplatePlain = `
+{{ .Greeting }}
+{{ range $line := .IntroLines}}
+{{ $line }}
+{{ end }}
+{{ if .ActionURL }}{{ .ActionText }}:
+{{ .ActionURL }}{{end}}
+{{ range $line := .OutroLines}}
+{{ $line }}
+{{ end }}`
+
+const mailTemplateHTML = `
+<!doctype html>
+<html style="width: 100%; height: 100%; padding: 0; margin: 0;">
+<head>
+    <meta name="viewport" content="width: display-width;">
+</head>
+<body style="width: 100%; padding: 0; margin: 0; background: #f3f4f6">
+<div style="width: 100%; font-family: 'Open Sans', sans-serif; text-rendering: optimizeLegibility">
+    <div style="width: 600px; margin: 0 auto; text-align: justify;">
+        <h1 style="font-size: 30px; text-align: center;">
+            <img src="{{.FrontendURL}}images/logo-full.svg" style="height: 75px;" alt="Vikunja"/>
+        </h1>
+        <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;">
+<p>
+	{{ .Greeting }}
+</p>
+
+{{ range $line := .IntroLines}}
+	<p>
+		{{ $line }}
+	</p>
+{{ end }}
+
+{{ if .ActionURL }}
+	<a href="{{ .ActionURL }}" title="{{ .ActionText }}"
+		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;">
+		{{ .ActionText }}
+	</a>
+{{end}}
+
+{{ range $line := .OutroLines}}
+	<p>
+		{{ $line }}
+	</p>
+{{ end }}
+
+{{ if .ActionURL }}
+	<p style="color: #9CA3AF;font-size:12px;border-top: 1px solid #dbdbdb;margin-top:20px;padding-top:20px;">
+		If the button above doesn't work, copy the url below and paste it in your browsers address bar:<br/>
+		{{ .ActionURL }}
+	</p>
+{{ end }}
+</div>
+</div>
+</div>
+</body>
+</html>
+`
+
+// RenderMail takes a precomposed mail message and renders it into a ready to send mail.Opts object
+func RenderMail(m *Mail) (mailOpts *mail.Opts, err error) {
+
+	var htmlContent bytes.Buffer
+	var plainContent bytes.Buffer
+
+	plain, err := templatetext.New("mail-plain").Parse(mailTemplatePlain)
+	if err != nil {
+		return nil, err
+	}
+
+	html, err := templatehtml.New("mail-plain").Parse(mailTemplateHTML)
+	if err != nil {
+		return nil, err
+	}
+
+	boundary := "np" + utils.MakeRandomString(13)
+
+	data := make(map[string]interface{})
+
+	data["Greeting"] = m.greeting
+	data["IntroLines"] = m.introLines
+	data["OutroLines"] = m.outroLines
+	data["ActionText"] = m.actionText
+	data["ActionURL"] = m.actionURL
+	data["Boundary"] = boundary
+	data["FrontendURL"] = config.ServiceFrontendurl.GetString()
+
+	err = plain.Execute(&plainContent, data)
+	if err != nil {
+		return nil, err
+	}
+	err = html.Execute(&htmlContent, data)
+	if err != nil {
+		return nil, err
+	}
+
+	mailOpts = &mail.Opts{
+		From:        m.from,
+		To:          m.to,
+		Subject:     m.subject,
+		ContentType: mail.ContentTypeMultipart,
+		Message:     plainContent.String(),
+		HTMLMessage: htmlContent.String(),
+		Boundary:    boundary,
+	}
+
+	return mailOpts, nil
+}