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event.go
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event.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 eventutil
import (
"strings"
"github.com/andrewkroh/go-sawmill/pkg/event"
)
// Append appends a value to an existing array. If a non-array value
// already exists then the value becomes the first element in the new
// array. This function does not deduplicate.
func Append(evt *event.Event, key string, item *event.Value) error {
if item == nil {
return nil
}
// Make the target value into an array.
targetValue := evt.Get(key)
if targetValue == nil {
targetValue = event.Array()
} else if targetValue.Type != event.ArrayType {
targetValue = event.Array(targetValue)
}
// Append the new item to the array.
if item.Type == event.ArrayType {
for _, v := range item.Array {
targetValue.Array = append(targetValue.Array, v)
}
} else {
targetValue.Array = append(targetValue.Array, item)
}
// Overwrite the existing value.
_, err := evt.Put(key, targetValue)
return err
}
// EscapeKey escapes dots contained in a key. This is non-idempotent
// (do not use it on a key that is already escaped).
func EscapeKey(key string) string {
if strings.IndexByte(key, '.') == -1 {
return key
}
return strings.ReplaceAll(key, ".", `\.`)
}