rano/mailer/message/render.go

// Copyright 2024 Patial Tech. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package message

import (
	"bytes"
	_ "embed"
	"html/template"

	"gitserver.in/patialtech/rano/config"
	"gitserver.in/patialtech/rano/mailer"
	"gitserver.in/patialtech/rano/util/structs"
)

//go:embed _layout.html
var layout string

type TplData struct {
	WebAssetsURL string
	mailer.Template
}

// render data in give HTML layout and content templates
func render(layout string, content string, data mailer.Template) (string, error) {
	// layout
	tpl, err := template.New("layout").Parse(layout)
	if err != nil {
		return "", err
	}

	// content
	_, err = tpl.New("content").Parse(content)
	if err != nil {
		return "", err
	}

	// excute layout + content temaplte and render data
	buf := new(bytes.Buffer)
	d := structs.Map(data)
	d["Title"] = "My App"
	d["WebAssetsURL"] = config.Read().WebURL
	d["AllowReply"] = false

	err = tpl.ExecuteTemplate(buf, "layout", d)
	if err != nil {
		return "", err
	}

	return buf.String(), nil
}