Move forward command to it's own file

The two commands did not have much code in common

commands/msg/forward.go

@@ -0,0 +1,104 @@
+package msg
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"git.sr.ht/~sircmpwn/aerc/widgets"
+	"github.com/emersion/go-message"
+	"github.com/emersion/go-message/mail"
+	"io"
+)
+
+type forward struct{}
+
+func init() {
+	register(forward{})
+}
+
+func (_ forward) Aliases() []string {
+	return []string{"forward"}
+}
+
+func (_ forward) Complete(aerc *widgets.Aerc, args []string) []string {
+	return nil
+}
+
+func (_ forward) Execute(aerc *widgets.Aerc, args []string) error {
+	if len(args) != 1 {
+		return errors.New("Usage: forward")
+	}
+
+	widget := aerc.SelectedTab().(widgets.ProvidesMessage)
+	acct := widget.SelectedAccount()
+	if acct == nil {
+		return errors.New("No account selected")
+	}
+	store := widget.Store()
+	if store == nil {
+		return errors.New("Cannot perform action. Messages still loading")
+	}
+	msg, err := widget.SelectedMessage()
+	if err != nil {
+		return err
+	}
+	acct.Logger().Println("Forwarding email " + msg.Envelope.MessageId)
+
+	subject := "Fwd: " + msg.Envelope.Subject
+	defaults := map[string]string{
+		"Subject": subject,
+	}
+	composer := widgets.NewComposer(aerc.Config(), acct.AccountConfig(),
+		acct.Worker(), defaults)
+
+	addTab := func() {
+		tab := aerc.NewTab(composer, subject)
+		composer.OnHeaderChange("Subject", func(subject string) {
+			if subject == "" {
+				tab.Name = "New email"
+			} else {
+				tab.Name = subject
+			}
+			tab.Content.Invalidate()
+		})
+	}
+
+	// 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
+		}
+
+		pipeout, pipein := io.Pipe()
+		scanner := bufio.NewScanner(part.Body)
+		go composer.SetContents(pipeout)
+		// TODO: Let user customize the date format used here
+		io.WriteString(pipein, fmt.Sprintf("Forwarded message from %s on %s:\n\n",
+			msg.Envelope.From[0].Name,
+			msg.Envelope.Date.Format("Mon Jan 2, 2006 at 3:04 PM")))
+		for scanner.Scan() {
+			io.WriteString(pipein, fmt.Sprintf("%s\n", scanner.Text()))
+		}
+		pipein.Close()
+		pipeout.Close()
+		addTab()
+	})
+	return nil
+}

commands/msg/reply.go

@@ -24,7 +24,7 @@ func init() {
 }
 
 func (_ reply) Aliases() []string {
-	return []string{"reply", "forward"}
+	return []string{"reply"}
 }
 
 func (_ reply) Complete(aerc *widgets.Aerc, args []string) []string {
@@ -103,15 +103,11 @@ func (_ reply) Execute(aerc *widgets.Aerc, args []string) error {
 	}
 
 	var subject string
-	if args[0] == "forward" {
-		subject = "Fwd: " + msg.Envelope.Subject
-	} else {
 	if !strings.HasPrefix(msg.Envelope.Subject, "Re: ") {
 		subject = "Re: " + msg.Envelope.Subject
 	} else {
 		subject = msg.Envelope.Subject
 	}
-	}
 
 	defaults := map[string]string{
 		"To":          strings.Join(to, ", "),
@@ -139,45 +135,6 @@ func (_ reply) Execute(aerc *widgets.Aerc, args []string) error {
 		})
 	}
 
-	if args[0] == "forward" {
-		// 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
-			}
-
-			pipeout, pipein := io.Pipe()
-			scanner := bufio.NewScanner(part.Body)
-			go composer.SetContents(pipeout)
-			// TODO: Let user customize the date format used here
-			io.WriteString(pipein, fmt.Sprintf("Forwarded message from %s on %s:\n\n",
-				msg.Envelope.From[0].Name,
-				msg.Envelope.Date.Format("Mon Jan 2, 2006 at 3:04 PM")))
-			for scanner.Scan() {
-				io.WriteString(pipein, fmt.Sprintf("%s\n", scanner.Text()))
-			}
-			pipein.Close()
-			pipeout.Close()
-			addTab()
-		})
-	} else {
 	if quote {
 		var (
 			path []int
@@ -228,7 +185,6 @@ func (_ reply) Execute(aerc *widgets.Aerc, args []string) error {
 	} else {
 		addTab()
 	}
-	}
 
 	return nil
 }