refactor: remove dead code

pkg/message/parser.go

@@ -45,6 +45,7 @@ func Parse(r io.Reader, key, keyName string) (m *pmapi.Message, mimeBody, plainB
 	}
 
 	if key != "" {
+		// TODO: This is currently broken!
 		if err = attachPublicKey(p.Root(), key, keyName); err != nil {
 			return
 		}

pkg/message/parser/part.go

@@ -97,3 +97,13 @@ func selectDecoderFromParams(params map[string]string) *encoding.Decoder {
 
 	return decoder
 }
+
+func (p *Part) is7BitClean() bool {
+	for _, b := range p.Body {
+		if b > 1<<7 {
+			return false
+		}
+	}
+
+	return true
+}

pkg/message/parser/writer.go

@@ -25,28 +25,16 @@ import (
 
 type Writer struct {
 	root *Part
-	cond []Condition
 }
 
-type Condition func(p *Part) bool
-
 func newWriter(root *Part) *Writer {
 	return &Writer{
 		root: root,
 	}
 }
 
-// WithCondition allows setting a condition when parts should be written.
-// Parts are passed to each condition set and if any condition returns false,
-// the part is not written.
-// This initially seemed like a good idea but is now kinda useless.
-func (w *Writer) WithCondition(cond Condition) *Writer {
-	w.cond = append(w.cond, cond)
-	return w
-}
-
 func (w *Writer) Write(ww io.Writer) error {
-	if w.shouldFilter(w.root) {
+	if !w.root.is7BitClean() {
 		w.root.Header.Add("Content-Transfer-Encoding", "base64")
 	}
 
@@ -62,32 +50,6 @@ func (w *Writer) Write(ww io.Writer) error {
 	return msgWriter.Close()
 }
 
-func (w *Writer) shouldWrite(p *Part) bool {
-	for _, cond := range w.cond {
-		if !cond(p) {
-			return false
-		}
-	}
-
-	return true
-}
-
-func (w *Writer) shouldFilter(p *Part) bool {
-	encoding := p.Header.Get("Content-Transfer-Encoding")
-
-	if encoding != "" && encoding == "quoted-printable" || encoding == "base64" {
-		return false
-	}
-
-	for _, b := range p.Body {
-		if b > 1<<7 {
-			return true
-		}
-	}
-
-	return false
-}
-
 func (w *Writer) write(writer *message.Writer, p *Part) error {
 	if len(p.children) > 0 {
 		for _, child := range p.children {
@@ -105,11 +67,7 @@ func (w *Writer) write(writer *message.Writer, p *Part) error {
 }
 
 func (w *Writer) writeAsChild(writer *message.Writer, p *Part) error {
-	if !w.shouldWrite(p) {
-		return nil
-	}
-
-	if w.shouldFilter(p) {
+	if !p.is7BitClean() {
 		p.Header.Add("Content-Transfer-Encoding", "base64")
 	}
 

pkg/message/parser/writer_test.go

@@ -36,26 +36,6 @@ func TestParserWrite(t *testing.T) {
 	assert.Equal(t, s("text_html_octet_attachment.eml"), crlf(buf.String()))
 }
 
-func TestParserWriteNoAttachments(t *testing.T) {
-	p := newTestParser(t, "text_html_octet_attachment.eml")
-
-	w := p.
-		NewWriter().
-		WithCondition(func(p *Part) bool {
-			// We don't write if the content disposition says it's an attachment.
-			if disp, _, err := p.Header.ContentDisposition(); err == nil && disp == "attachment" {
-				return false
-			}
-
-			return true
-		})
-
-	buf := new(bytes.Buffer)
-
-	assert.NoError(t, w.Write(buf))
-	assert.Equal(t, s("text_html.eml"), crlf(buf.String()))
-}
-
 func crlf(s string) string {
 	return strings.ReplaceAll(s, "\r\n", "\n")
 }