Adding upstream version 2.5.1.

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

analysis/datetime/flexible/flexible.go

@@ -0,0 +1,67 @@
+//  Copyright (c) 2014 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 flexible
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+	"github.com/blevesearch/bleve/v2/registry"
+)
+
+const Name = "flexiblego"
+
+type DateTimeParser struct {
+	layouts []string
+}
+
+func New(layouts []string) *DateTimeParser {
+	return &DateTimeParser{
+		layouts: layouts,
+	}
+}
+
+func (p *DateTimeParser) ParseDateTime(input string) (time.Time, string, error) {
+	for _, layout := range p.layouts {
+		rv, err := time.Parse(layout, input)
+		if err == nil {
+			return rv, layout, nil
+		}
+	}
+	return time.Time{}, "", analysis.ErrInvalidDateTime
+}
+
+func DateTimeParserConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.DateTimeParser, error) {
+	layouts, ok := config["layouts"].([]interface{})
+	if !ok {
+		return nil, fmt.Errorf("must specify layouts")
+	}
+	var layoutStrs []string
+	for _, layout := range layouts {
+		layoutStr, ok := layout.(string)
+		if ok {
+			layoutStrs = append(layoutStrs, layoutStr)
+		}
+	}
+	return New(layoutStrs), nil
+}
+
+func init() {
+	err := registry.RegisterDateTimeParser(Name, DateTimeParserConstructor)
+	if err != nil {
+		panic(err)
+	}
+}

analysis/datetime/flexible/flexible_test.go

@@ -0,0 +1,100 @@
+//  Copyright (c) 2014 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 flexible
+
+import (
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+)
+
+func TestFlexibleDateTimeParser(t *testing.T) {
+	testLocation := time.FixedZone("", -8*60*60)
+
+	rfc3339NoTimezone := "2006-01-02T15:04:05"
+	rfc3339NoTimezoneNoT := "2006-01-02 15:04:05"
+	rfc3339NoTime := "2006-01-02"
+
+	dateOptionalTimeParser := New(
+		[]string{
+			time.RFC3339Nano,
+			time.RFC3339,
+			rfc3339NoTimezone,
+			rfc3339NoTimezoneNoT,
+			rfc3339NoTime,
+		})
+
+	tests := []struct {
+		input          string
+		expectedTime   time.Time
+		expectedLayout string
+		expectedError  error
+	}{
+		{
+			input:          "2014-08-03",
+			expectedTime:   time.Date(2014, 8, 3, 0, 0, 0, 0, time.UTC),
+			expectedLayout: rfc3339NoTime,
+			expectedError:  nil,
+		},
+		{
+			input:          "2014-08-03T15:59:30",
+			expectedTime:   time.Date(2014, 8, 3, 15, 59, 30, 0, time.UTC),
+			expectedLayout: rfc3339NoTimezone,
+			expectedError:  nil,
+		},
+		{
+			input:          "2014-08-03 15:59:30",
+			expectedTime:   time.Date(2014, 8, 3, 15, 59, 30, 0, time.UTC),
+			expectedLayout: rfc3339NoTimezoneNoT,
+			expectedError:  nil,
+		},
+		{
+			input:          "2014-08-03T15:59:30-08:00",
+			expectedTime:   time.Date(2014, 8, 3, 15, 59, 30, 0, testLocation),
+			expectedLayout: time.RFC3339Nano,
+			expectedError:  nil,
+		},
+		{
+
+			input:          "2014-08-03T15:59:30.999999999-08:00",
+			expectedTime:   time.Date(2014, 8, 3, 15, 59, 30, 999999999, testLocation),
+			expectedLayout: time.RFC3339Nano,
+			expectedError:  nil,
+		},
+		{
+			input:          "not a date time",
+			expectedTime:   time.Time{},
+			expectedLayout: "",
+			expectedError:  analysis.ErrInvalidDateTime,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.input, func(t *testing.T) {
+			actualTime, actualLayout, actualErr := dateOptionalTimeParser.ParseDateTime(test.input)
+			if actualErr != test.expectedError {
+				t.Fatalf("expected error %#v, got %#v", test.expectedError, actualErr)
+			}
+			if !reflect.DeepEqual(actualTime, test.expectedTime) {
+				t.Errorf("expected time %v, got %v", test.expectedTime, actualTime)
+			}
+			if !reflect.DeepEqual(actualLayout, test.expectedLayout) {
+				t.Errorf("expected layout %v, got %v", test.expectedLayout, actualLayout)
+			}
+		})
+	}
+}