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parser.go
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parser.go
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/*
* Copyright 2022 The Furiko Authors.
*
* 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 cronparser
import (
"github.com/furiko-io/cronexpr"
configv1alpha1 "github.com/furiko-io/furiko/apis/config/v1alpha1"
)
// Parser wraps the raw cronexpr parser to encapsulate common configuration.
type Parser struct {
format cronexpr.CronFormat
hashNames bool
opts []cronexpr.ParseOption
}
func NewParser(cfg *configv1alpha1.CronExecutionConfig) *Parser {
format := cronexpr.CronFormatStandard
if cronexpr.CronFormat(cfg.CronFormat) == cronexpr.CronFormatQuartz {
format = cronexpr.CronFormatQuartz
}
hashNames := unwrapBool(cfg.CronHashNames, true)
var parseOpts []cronexpr.ParseOption
if hashNames {
if unwrapBool(cfg.CronHashSecondsByDefault, false) {
parseOpts = append(parseOpts, cronexpr.WithHashEmptySeconds())
}
if unwrapBool(cfg.CronHashFields, true) {
parseOpts = append(parseOpts, cronexpr.WithHashFields())
}
}
return &Parser{
format: format,
hashNames: hashNames,
opts: parseOpts,
}
}
func (p *Parser) Parse(cronLine string, hashID string) (*cronexpr.Expression, error) {
opts := p.opts
if p.hashNames {
newOpts := make([]cronexpr.ParseOption, 0, len(p.opts)+1)
newOpts = append(newOpts, cronexpr.WithHash(hashID))
newOpts = append(newOpts, p.opts...)
opts = newOpts
}
return cronexpr.ParseForFormat(p.format, cronLine, opts...)
}
func unwrapBool(b *bool, defaultBool bool) bool {
val := defaultBool
if b != nil {
val = *b
}
return val
}