templates: add boolean flags

Allow accessing email flags via boolean properties instead of having to
rely on obscure regular expressions on (.Flags | join ""). With this
patch, it is now possible to do this:

[ui]
index-columns = star:1,name<15%,reply:1,subject,size>=,date>=
column-star = {{if .IsFlagged}}★{{end}}
column-name = {{if eq .Role "sent"}}{{.To | names | join ", "}}{{else}}{{.From | names | join ", "}}{{end}}
column-reply = {{if .IsReplied}}{{end}}
column-subject = {{.ThreadPrefix}}{{.Subject}}
column-size = {{if .HasAttachment}}📎 {{end}}{{humanReadable .Size}}
column-date = {{.DateAutoFormat .Date.Local}}

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

1 files changed, 43 insertions, 0 deletions

diff --git a/lib/state/templates.go b/lib/state/templates.go
index b0daa2cc..8c7df3e8 100644
--- a/lib/state/templates.go
+++ b/lib/state/templates.go
@@ -336,6 +336,49 @@ func (d *templateData) Flags() []string {
 	return flags
 }
 
+func (d *templateData) IsReplied() bool {
+	if d.info != nil && d.info.Flags.Has(models.AnsweredFlag) {
+		return true
+	}
+	return false
+}
+
+func (d *templateData) HasAttachment() bool {
+	if d.info != nil && d.info.BodyStructure != nil {
+		for _, bS := range d.info.BodyStructure.Parts {
+			if strings.ToLower(bS.Disposition) == "attachment" {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func (d *templateData) IsRecent() bool {
+	if d.info != nil && d.info.Flags.Has(models.RecentFlag) {
+		return true
+	}
+	return false
+}
+
+func (d *templateData) IsUnread() bool {
+	if d.info != nil && !d.info.Flags.Has(models.SeenFlag) {
+		return true
+	}
+	return false
+}
+
+func (d *templateData) IsFlagged() bool {
+	if d.info != nil && d.info.Flags.Has(models.FlaggedFlag) {
+		return true
+	}
+	return false
+}
+
+func (d *templateData) IsMarked() bool {
+	return d.marked
+}
+
 func (d *templateData) MessageId() string {
 	if d.info == nil || d.info.Envelope == nil {
 		return ""