Make :pipe command more generic

1 files changed, 105 insertions, 0 deletions

diff --git a/commands/msg/pipe.go b/commands/msg/pipe.go
new file mode 100644
index 00000000..949bc95e
--- /dev/null
+++ b/commands/msg/pipe.go
@@ -0,0 +1,105 @@
+package msg
+
+import (
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"io"
+	"mime/quotedprintable"
+	"strings"
+
+	"git.sr.ht/~sircmpwn/getopt"
+
+	"git.sr.ht/~sircmpwn/aerc/commands"
+	"git.sr.ht/~sircmpwn/aerc/widgets"
+)
+
+type Pipe struct{}
+
+func init() {
+	register(Pipe{})
+}
+
+func (_ Pipe) Aliases() []string {
+	return []string{"pipe"}
+}
+
+func (_ Pipe) Complete(aerc *widgets.Aerc, args []string) []string {
+	return nil
+}
+
+func (_ Pipe) Execute(aerc *widgets.Aerc, args []string) error {
+	var (
+		pipeFull bool
+		pipePart bool
+	)
+	// TODO: let user specify part by index or preferred mimetype
+	opts, optind, err := getopt.Getopts(args, "mp")
+	if err != nil {
+		return err
+	}
+	for _, opt := range opts {
+		switch opt.Option {
+		case 'm':
+			if pipePart {
+				return errors.New("-m and -p are mutually exclusive")
+			}
+			pipeFull = true
+		case 'p':
+			if pipeFull {
+				return errors.New("-m and -p are mutually exclusive")
+			}
+			pipePart = true
+		}
+	}
+	cmd := args[optind:]
+	if len(cmd) == 0 {
+		return errors.New("Usage: pipe [-mp] <cmd> [args...]")
+	}
+
+	provider := aerc.SelectedTab().(widgets.ProvidesMessage)
+	if !pipeFull && !pipePart {
+		if _, ok := provider.(*widgets.MessageViewer); ok {
+			pipePart = true
+		} else if _, ok := provider.(*widgets.AccountView); ok {
+			pipeFull = true
+		} else {
+			return errors.New(
+				"Neither -m nor -p specified and cannot infer default")
+		}
+	}
+
+	if pipeFull {
+		store := provider.Store()
+		msg := provider.SelectedMessage()
+		store.FetchFull([]uint32{msg.Uid}, func(reader io.Reader) {
+			term, err := commands.QuickTerm(aerc, cmd, reader)
+			if err != nil {
+				aerc.PushError(" " + err.Error())
+				return
+			}
+			name := cmd[0] + " <" + msg.Envelope.Subject
+			aerc.NewTab(term, name)
+		})
+	} 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)
+			}
+
+			term, err := commands.QuickTerm(aerc, cmd, reader)
+			if err != nil {
+				aerc.PushError(" " + err.Error())
+				return
+			}
+			name := fmt.Sprintf("%s <%s/[%d]", cmd[0], p.Msg.Envelope.Subject, p.Index)
+			aerc.NewTab(term, name)
+		})
+	}
+
+	return nil
+}