FetchBodyParts: decode source in the workers

Previously the workers returned a mixture of decoded / encoded parts.
This lead to a whole bunch of issues.
This commit changes the msgviewer and the commands to assume parts to already
be decoded

5 files changed, 8 insertions, 89 deletions

diff --git a/commands/msg/forward.go b/commands/msg/forward.go
index 75701772..35d276e6 100644
--- a/commands/msg/forward.go
+++ b/commands/msg/forward.go
@@ -10,9 +10,6 @@ import (
 	"path"
 	"strings"
 
-	"github.com/emersion/go-message"
-	"github.com/emersion/go-message/mail"
-
 	"git.sr.ht/~sircmpwn/aerc/models"
 	"git.sr.ht/~sircmpwn/aerc/widgets"
 	"git.sr.ht/~sircmpwn/getopt"
@@ -138,28 +135,9 @@ func (forward) Execute(aerc *widgets.Aerc, args []string) error {
 
 		// TODO: something more intelligent than fetching the 1st part
 		// TODO: add attachments!
-		store.FetchBodyPart(msg.Uid, []int{1}, func(reader io.Reader) {
-			header := message.Header{}
-			header.SetText(
-				"Content-Transfer-Encoding", msg.BodyStructure.Encoding)
-			header.SetContentType(
-				msg.BodyStructure.MIMEType, msg.BodyStructure.Params)
-			header.SetText("Content-Description", msg.BodyStructure.Description)
-			entity, err := message.New(header, reader)
-			if err != nil {
-				// TODO: Do something with the error
-				addTab()
-				return
-			}
-			mreader := mail.NewReader(entity)
-			part, err := mreader.NextPart()
-			if err != nil {
-				// TODO: Do something with the error
-				addTab()
-				return
-			}
+		store.FetchBodyPart(msg.Uid, msg.BodyStructure, []int{1}, func(reader io.Reader) {
 			buf := new(bytes.Buffer)
-			buf.ReadFrom(part.Body)
+			buf.ReadFrom(reader)
 			defaults["Original"] = buf.String()
 			addTab()
 		})
diff --git a/commands/msg/pipe.go b/commands/msg/pipe.go
index 2faa5de1..001577c1 100644
--- a/commands/msg/pipe.go
+++ b/commands/msg/pipe.go
@@ -1,13 +1,10 @@
 package msg
 
 import (
-	"encoding/base64"
 	"errors"
 	"fmt"
 	"io"
-	"mime/quotedprintable"
 	"os/exec"
-	"strings"
 	"time"
 
 	"git.sr.ht/~sircmpwn/aerc/commands"
@@ -129,14 +126,7 @@ func (Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 		})
 	} else if pipePart {
 		p := provider.SelectedMessagePart()
-		p.Store.FetchBodyPart(p.Msg.Uid, p.Index, func(reader io.Reader) {
-			// email parts are encoded as 7bit (plaintext), quoted-printable, or base64
-			if strings.EqualFold(p.Part.Encoding, "base64") {
-				reader = base64.NewDecoder(base64.StdEncoding, reader)
-			} else if strings.EqualFold(p.Part.Encoding, "quoted-printable") {
-				reader = quotedprintable.NewReader(reader)
-			}
-
+		p.Store.FetchBodyPart(p.Msg.Uid, p.Msg.BodyStructure, p.Index, func(reader io.Reader) {
 			if background {
 				doExec(reader)
 			} else {
diff --git a/commands/msg/reply.go b/commands/msg/reply.go
index 359c5dd5..a7379d75 100644
--- a/commands/msg/reply.go
+++ b/commands/msg/reply.go
@@ -9,9 +9,6 @@ import (
 	"strings"
 
 	"git.sr.ht/~sircmpwn/getopt"
-	"github.com/emersion/go-message"
-	_ "github.com/emersion/go-message/charset"
-	"github.com/emersion/go-message/mail"
 
 	"git.sr.ht/~sircmpwn/aerc/models"
 	"git.sr.ht/~sircmpwn/aerc/widgets"
@@ -155,56 +152,9 @@ func (reply) Execute(aerc *widgets.Aerc, args []string) error {
 			template = aerc.Config().Templates.QuotedReply
 		}
 
-		store.FetchBodyPart(msg.Uid, []int{1}, func(reader io.Reader) {
-			header := message.Header{}
-			if len(msg.BodyStructure.Parts) > 0 {
-				partID := 0 // TODO: will we always choose first msg part?
-				header.SetText(
-					"Content-Transfer-Encoding", msg.BodyStructure.Parts[partID].Encoding)
-				if msg.BodyStructure.Parts[partID].MIMESubType == "" {
-					header.SetContentType(
-						msg.BodyStructure.Parts[partID].MIMEType,
-						msg.BodyStructure.Parts[partID].Params)
-				} else {
-					// include SubType if defined (text/plain, text/html, ...)
-					header.SetContentType(
-						fmt.Sprintf("%s/%s", msg.BodyStructure.Parts[partID].MIMEType,
-							msg.BodyStructure.Parts[partID].MIMESubType),
-						msg.BodyStructure.Parts[partID].Params)
-				}
-				header.SetText("Content-Description", msg.BodyStructure.Parts[partID].Description)
-			} else { // Parts has no headers, so we use global headers info
-				header.SetText(
-					"Content-Transfer-Encoding", msg.BodyStructure.Encoding)
-				if msg.BodyStructure.MIMESubType == "" {
-					header.SetContentType(
-						msg.BodyStructure.MIMEType,
-						msg.BodyStructure.Params)
-				} else {
-					// include SubType if defined (text/plain, text/html, ...)
-					header.SetContentType(
-						fmt.Sprintf("%s/%s", msg.BodyStructure.MIMEType,
-							msg.BodyStructure.MIMESubType),
-						msg.BodyStructure.Params)
-				}
-				header.SetText("Content-Description", msg.BodyStructure.Description)
-			}
-			entity, err := message.New(header, reader)
-			if err != nil {
-				// TODO: Do something with the error
-				addTab()
-				return
-			}
-			mreader := mail.NewReader(entity)
-			part, err := mreader.NextPart()
-			if err != nil {
-				// TODO: Do something with the error
-				addTab()
-				return
-			}
-
+		store.FetchBodyPart(msg.Uid, msg.BodyStructure, []int{1}, func(reader io.Reader) {
 			buf := new(bytes.Buffer)
-			buf.ReadFrom(part.Body)
+			buf.ReadFrom(reader)
 			defaults["Original"] = buf.String()
 			addTab()
 		})
@@ -214,6 +164,7 @@ func (reply) Execute(aerc *widgets.Aerc, args []string) error {
 	}
 }
 
+//TODO (RPB): unused function
 func findPlaintext(bs *models.BodyStructure,
 	path []int) (*models.BodyStructure, []int) {
 
diff --git a/commands/msgview/open.go b/commands/msgview/open.go
index ab023a10..6001d280 100644
--- a/commands/msgview/open.go
+++ b/commands/msgview/open.go
@@ -36,7 +36,7 @@ func (Open) Execute(aerc *widgets.Aerc, args []string) error {
 	mv := aerc.SelectedTab().(*widgets.MessageViewer)
 	p := mv.SelectedMessagePart()
 
-	p.Store.FetchBodyPart(p.Msg.Uid, p.Index, func(reader io.Reader) {
+	p.Store.FetchBodyPart(p.Msg.Uid, p.Msg.BodyStructure, p.Index, func(reader io.Reader) {
 		// email parts are encoded as 7bit (plaintext), quoted-printable, or base64
 
 		if strings.EqualFold(p.Part.Encoding, "base64") {
diff --git a/commands/msgview/save.go b/commands/msgview/save.go
index 99abe0e2..c017e707 100644
--- a/commands/msgview/save.go
+++ b/commands/msgview/save.go
@@ -60,7 +60,7 @@ func (Save) Execute(aerc *widgets.Aerc, args []string) error {
 	mv := aerc.SelectedTab().(*widgets.MessageViewer)
 	p := mv.SelectedMessagePart()
 
-	p.Store.FetchBodyPart(p.Msg.Uid, p.Index, func(reader io.Reader) {
+	p.Store.FetchBodyPart(p.Msg.Uid, p.Msg.BodyStructure, p.Index, func(reader io.Reader) {
 		// email parts are encoded as 7bit (plaintext), quoted-printable, or base64
 
 		if strings.EqualFold(p.Part.Encoding, "base64") {