Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

analysis/datetime/timestamp/nanoseconds/nanoseconds.go

@@ -0,0 +1,55 @@
+//  Copyright (c) 2023 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package nanoseconds
+
+import (
+	"math"
+	"strconv"
+	"time"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+	"github.com/blevesearch/bleve/v2/registry"
+)
+
+const Name = "unix_nano"
+
+type DateTimeParser struct {
+}
+
+var minBound int64 = math.MinInt64
+var maxBound int64 = math.MaxInt64
+
+func (p *DateTimeParser) ParseDateTime(input string) (time.Time, string, error) {
+	// unix timestamp is milliseconds since UNIX epoch
+	timestamp, err := strconv.ParseInt(input, 10, 64)
+	if err != nil {
+		return time.Time{}, "", analysis.ErrInvalidTimestampString
+	}
+	if timestamp < minBound || timestamp > maxBound {
+		return time.Time{}, "", analysis.ErrInvalidTimestampRange
+	}
+	return time.Unix(0, timestamp), Name, nil
+}
+
+func DateTimeParserConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.DateTimeParser, error) {
+	return &DateTimeParser{}, nil
+}
+
+func init() {
+	err := registry.RegisterDateTimeParser(Name, DateTimeParserConstructor)
+	if err != nil {
+		panic(err)
+	}
+}