dirtree: add custom virtual directory role

Add a new directory role to indicate virtual nodes in the directory
tree. This allows to style the virtual nodes differently and apply
different behaviors in some commands (i.e. rmdir).

Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 7 insertions, 0 deletions

diff --git a/commands/account/rmdir.go b/commands/account/rmdir.go
index 6590a819..0793c7b8 100644
--- a/commands/account/rmdir.go
+++ b/commands/account/rmdir.go
@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"git.sr.ht/~rjarry/aerc/app"
+	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/worker/types"
 )
 
@@ -31,6 +32,12 @@ func (r RemoveDir) Execute(args []string) error {
 		return errors.New("Refusing to remove non-empty directory; use -f")
 	}
 
+	if d := acct.Directories().SelectedDirectory(); d != nil {
+		if d.Role == models.VirtualRole {
+			return errors.New("Cannot remove a virtual node")
+		}
+	}
+
 	curDir := acct.SelectedDirectory()
 	var newDir string
 	dirFound := false