add index template completion, index pattern filter and name filter

pkg/es/index_template.go

@@ -33,7 +33,23 @@ import (
 )
 
 // used for completion
-func IndexTemplateList(conf *cfg.Config) error {
+func IndexTemplateNames(conf *cfg.Config) ([]string, error) {
+	res, err := conf.DefaultCluster.ES().Indices.GetIndexTemplate().
+		Do(context.Background())
+	if err != nil {
+		return nil, fmt.Errorf("failed to get index templates: %w", esErrorString(err))
+	}
+
+	names := make([]string, len(res.IndexTemplates))
+
+	for idx, tpl := range res.IndexTemplates {
+		names[idx] = tpl.Name
+	}
+
+	return names, nil
+}
+
+func IndexTemplateList(conf *cfg.Config, filter string) error {
 	res, err := conf.DefaultCluster.ES().Indices.GetIndexTemplate().
 		Do(context.Background())
 	if err != nil {
@@ -42,20 +58,42 @@ func IndexTemplateList(conf *cfg.Config) error {
 
 	slog.Debug("res", "index templates", res)
 
-	table := printer.NewTable(conf, 5, len(res.IndexTemplates))
-	table.Addheaders("name", "description", "priority")
+	table := printer.NewTable(conf, 5, 0)
+	table.Addheaders("name", "description", "index patterns", "priority")
 
-	for idx, tpl := range res.IndexTemplates {
-		desc, err := json.Marshal(tpl.IndexTemplate.Meta_["description"])
-		if err != nil {
-			return fmt.Errorf("failed to unmarshal meta json data: %w", err)
+	for _, tpl := range res.IndexTemplates {
+		if !conf.Hidden && strings.HasPrefix(tpl.Name, ".") {
+			continue
 		}
 
+		if filter != "" && !strings.Contains(tpl.Name, filter) {
+			continue
+		}
+
+		if len(conf.Filter) > 0 {
+			skip := true
+
+			for _, filter := range conf.Filter {
+				for _, pattern := range tpl.IndexTemplate.IndexPatterns {
+					if strings.Contains(pattern, filter) {
+						skip = false
+					}
+				}
+			}
+
+			if skip {
+				continue
+			}
+		}
+
+		desc := strings.TrimPrefix(strings.TrimSuffix(string(tpl.IndexTemplate.Meta_["description"]), `"`), `"`)
+
 		var prio int64
 		if tpl.IndexTemplate.Priority != nil {
 			prio = *tpl.IndexTemplate.Priority
 		}
-		table.Entries[idx] = []any{tpl.Name, desc, prio}
+
+		table.AddRow(tpl.Name, desc, tpl.IndexTemplate.IndexPatterns, prio)
 	}
 
 	table.Sort()