search/filter: update completion

Update the completion system by implementing the OptionsProvider and
OptionComleter interfaces. The command flags that expect arguments can
be completed now: -x,-X with the available flags, -t,-f,-c with the
address book (after more then 3 characters), -d with a selected
suggestion for useful dates.

Examples:

:filter -<Tab>
lists the available option flags

:filter -t org<Tab>
fills the completion menu with address from your address-book-cmd
matching "org" (same with -f and -c)

:filter -x <Tab>
lists the available flags (same with -X)

:filter -d <Tab>
lists a few convenient date terms

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

1 files changed, 23 insertions, 0 deletions

diff --git a/commands/account/search.go b/commands/account/search.go
index 71833afd..d7884f15 100644
--- a/commands/account/search.go
+++ b/commands/account/search.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"strings"
 
+	"git.sr.ht/~rjarry/aerc/commands"
 	"git.sr.ht/~rjarry/aerc/lib/state"
 	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/log"
@@ -17,10 +18,32 @@ func init() {
 	register(SearchFilter{})
 }
 
+func (SearchFilter) Options() string {
+	return "rubax:X:t:H:f:c:d:"
+}
+
 func (SearchFilter) Aliases() []string {
 	return []string{"search", "filter"}
 }
 
+func (s SearchFilter) CompleteOption(
+	aerc *widgets.Aerc,
+	r rune,
+	search string,
+) []string {
+	var valid []string
+	switch r {
+	case 'x', 'X':
+		valid = commands.GetFlagList()
+	case 't', 'f', 'c':
+		valid = commands.GetAddress(aerc, search)
+	case 'd':
+		valid = commands.GetDateList()
+	default:
+	}
+	return commands.CompletionFromList(aerc, valid, []string{search})
+}
+
 func (SearchFilter) Complete(aerc *widgets.Aerc, args []string) []string {
 	return nil
 }