forked from Silverfish/proton-bridge
85 lines
1.8 KiB
Go
85 lines
1.8 KiB
Go
// Copyright (c) 2020 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License 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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// ProtonMail Bridge 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package parser
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import (
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"io"
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"github.com/emersion/go-message"
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)
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type Writer struct {
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root *Part
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}
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func newWriter(root *Part) *Writer {
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return &Writer{
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root: root,
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}
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}
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func (w *Writer) Write(ww io.Writer) error {
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if !w.root.is7BitClean() {
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w.root.Header.Set("Content-Transfer-Encoding", "base64")
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}
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msgWriter, err := message.CreateWriter(ww, w.root.Header)
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if err != nil {
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return err
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}
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if err := w.write(msgWriter, w.root); err != nil {
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return err
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}
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return msgWriter.Close()
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}
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func (w *Writer) write(writer *message.Writer, p *Part) error {
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if len(p.children) > 0 {
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for _, child := range p.children {
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if err := w.writeAsChild(writer, child); err != nil {
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return err
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}
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}
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}
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if _, err := writer.Write(p.Body); err != nil {
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return err
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}
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return nil
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}
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func (w *Writer) writeAsChild(writer *message.Writer, p *Part) error {
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if !p.is7BitClean() {
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p.Header.Set("Content-Transfer-Encoding", "base64")
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}
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childWriter, err := writer.CreatePart(p.Header)
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if err != nil {
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return err
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}
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if err := w.write(childWriter, p); err != nil {
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return err
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}
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return childWriter.Close()
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}
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