mirror of
https://github.com/go-gitea/gitea
synced 2024-12-21 16:14:22 +01:00
144 lines
3.9 KiB
Go
144 lines
3.9 KiB
Go
// 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 document
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"time"
|
|
|
|
"github.com/blevesearch/bleve/analysis"
|
|
"github.com/blevesearch/bleve/numeric"
|
|
)
|
|
|
|
const DefaultDateTimeIndexingOptions = StoreField | IndexField
|
|
const DefaultDateTimePrecisionStep uint = 4
|
|
|
|
var MinTimeRepresentable = time.Unix(0, math.MinInt64)
|
|
var MaxTimeRepresentable = time.Unix(0, math.MaxInt64)
|
|
|
|
type DateTimeField struct {
|
|
name string
|
|
arrayPositions []uint64
|
|
options IndexingOptions
|
|
value numeric.PrefixCoded
|
|
numPlainTextBytes uint64
|
|
}
|
|
|
|
func (n *DateTimeField) Name() string {
|
|
return n.name
|
|
}
|
|
|
|
func (n *DateTimeField) ArrayPositions() []uint64 {
|
|
return n.arrayPositions
|
|
}
|
|
|
|
func (n *DateTimeField) Options() IndexingOptions {
|
|
return n.options
|
|
}
|
|
|
|
func (n *DateTimeField) Analyze() (int, analysis.TokenFrequencies) {
|
|
tokens := make(analysis.TokenStream, 0)
|
|
tokens = append(tokens, &analysis.Token{
|
|
Start: 0,
|
|
End: len(n.value),
|
|
Term: n.value,
|
|
Position: 1,
|
|
Type: analysis.DateTime,
|
|
})
|
|
|
|
original, err := n.value.Int64()
|
|
if err == nil {
|
|
|
|
shift := DefaultDateTimePrecisionStep
|
|
for shift < 64 {
|
|
shiftEncoded, err := numeric.NewPrefixCodedInt64(original, shift)
|
|
if err != nil {
|
|
break
|
|
}
|
|
token := analysis.Token{
|
|
Start: 0,
|
|
End: len(shiftEncoded),
|
|
Term: shiftEncoded,
|
|
Position: 1,
|
|
Type: analysis.DateTime,
|
|
}
|
|
tokens = append(tokens, &token)
|
|
shift += DefaultDateTimePrecisionStep
|
|
}
|
|
}
|
|
|
|
fieldLength := len(tokens)
|
|
tokenFreqs := analysis.TokenFrequency(tokens, n.arrayPositions, n.options.IncludeTermVectors())
|
|
return fieldLength, tokenFreqs
|
|
}
|
|
|
|
func (n *DateTimeField) Value() []byte {
|
|
return n.value
|
|
}
|
|
|
|
func (n *DateTimeField) DateTime() (time.Time, error) {
|
|
i64, err := n.value.Int64()
|
|
if err != nil {
|
|
return time.Time{}, err
|
|
}
|
|
return time.Unix(0, i64).UTC(), nil
|
|
}
|
|
|
|
func (n *DateTimeField) GoString() string {
|
|
return fmt.Sprintf("&document.DateField{Name:%s, Options: %s, Value: %s}", n.name, n.options, n.value)
|
|
}
|
|
|
|
func (n *DateTimeField) NumPlainTextBytes() uint64 {
|
|
return n.numPlainTextBytes
|
|
}
|
|
|
|
func NewDateTimeFieldFromBytes(name string, arrayPositions []uint64, value []byte) *DateTimeField {
|
|
return &DateTimeField{
|
|
name: name,
|
|
arrayPositions: arrayPositions,
|
|
value: value,
|
|
options: DefaultDateTimeIndexingOptions,
|
|
numPlainTextBytes: uint64(len(value)),
|
|
}
|
|
}
|
|
|
|
func NewDateTimeField(name string, arrayPositions []uint64, dt time.Time) (*DateTimeField, error) {
|
|
return NewDateTimeFieldWithIndexingOptions(name, arrayPositions, dt, DefaultDateTimeIndexingOptions)
|
|
}
|
|
|
|
func NewDateTimeFieldWithIndexingOptions(name string, arrayPositions []uint64, dt time.Time, options IndexingOptions) (*DateTimeField, error) {
|
|
if canRepresent(dt) {
|
|
dtInt64 := dt.UnixNano()
|
|
prefixCoded := numeric.MustNewPrefixCodedInt64(dtInt64, 0)
|
|
return &DateTimeField{
|
|
name: name,
|
|
arrayPositions: arrayPositions,
|
|
value: prefixCoded,
|
|
options: options,
|
|
// not correct, just a place holder until we revisit how fields are
|
|
// represented and can fix this better
|
|
numPlainTextBytes: uint64(8),
|
|
}, nil
|
|
}
|
|
return nil, fmt.Errorf("cannot represent %s in this type", dt)
|
|
}
|
|
|
|
func canRepresent(dt time.Time) bool {
|
|
if dt.Before(MinTimeRepresentable) || dt.After(MaxTimeRepresentable) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|