dirlist: use templates instead of % mini language

Replace dirlist-format with two settings: dirlist-left & dirlist-right.
These two settings take aerc-templates(7) and may be left empty.

Add automatic translation of dirlist-format to these new settings.
Display a warning on startup if dirlist-format has been converted.

Signed-off-by: Robin Jarry <robin@jarry.cc>
Acked-by: Tim Culverhouse <tim@timculverhouse.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/state/templates.go b/lib/state/templates.go
index f37c4865..2d5e39f5 100644
--- a/lib/state/templates.go
+++ b/lib/state/templates.go
@@ -1,6 +1,7 @@
 package state
 
 import (
+	"fmt"
 	"strings"
 	"time"
 
@@ -369,6 +370,19 @@ func (d *TemplateData) Exists(folders ...string) int {
 	return e
 }
 
+func (d *TemplateData) RUE(folders ...string) string {
+	r, u, e := d.rue(folders...)
+	switch {
+	case r > 0:
+		return fmt.Sprintf("%d/%d/%d", r, u, e)
+	case u > 0:
+		return fmt.Sprintf("%d/%d", u, e)
+	case e > 0:
+		return fmt.Sprintf("%d", e)
+	}
+	return ""
+}
+
 func (d *TemplateData) Connected() bool {
 	if d.state != nil {
 		return d.state.Connected