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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 schema
import (
"github.com/joeshaw/multierror"
"github.com/elastic/beats/libbeat/common"
)
// DefaultApplyOptions are the default options for Apply()
var DefaultApplyOptions = []ApplyOption{AllRequired}
// ApplyOption modifies the result of Apply
type ApplyOption func(common.MapStr, multierror.Errors) (common.MapStr, multierror.Errors)
// AllRequired considers any missing field as an error, except if explicitly
// set as optional
func AllRequired(event common.MapStr, errors multierror.Errors) (common.MapStr, multierror.Errors) {
k := 0
for i, err := range errors {
if err, ok := err.(*KeyNotFoundError); ok {
if err.Optional {
continue
}
}
errors[k] = errors[i]
k++
}
return event, errors[:k]
}
// FailOnRequired considers missing fields as an error only if they are set
// as required
func FailOnRequired(event common.MapStr, errors multierror.Errors) (common.MapStr, multierror.Errors) {
k := 0
for i, err := range errors {
if err, ok := err.(*KeyNotFoundError); ok {
if !err.Required {
continue
}
}
errors[k] = errors[i]
k++
}
return event, errors[:k]
}
// NotFoundKeys calls a function with the list of missing keys as parameter
func NotFoundKeys(cb func(keys []string)) ApplyOption {
return func(event common.MapStr, errors multierror.Errors) (common.MapStr, multierror.Errors) {
var keys []string
for _, err := range errors {
if err, ok := err.(*KeyNotFoundError); ok {
keys = append(keys, err.Key())
}
}
cb(keys)
return event, errors
}
}
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