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pattern_filter.go
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pattern_filter.go
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// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
//
// 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 source
import (
"regexp"
"github.com/vmware/harbor/src/common/utils/log"
"github.com/vmware/harbor/src/replication/models"
)
// PatternFilter implements Filter interface for pattern filter
type PatternFilter struct {
kind string
pattern string
convertor Convertor
}
// NewPatternFilter returns an instance of PatternFilter
func NewPatternFilter(kind, pattern string, convertor ...Convertor) *PatternFilter {
filer := &PatternFilter{
kind: kind,
pattern: pattern,
}
if len(convertor) > 0 {
filer.convertor = convertor[0]
}
return filer
}
// Init the filter. nil implement for now
func (p *PatternFilter) Init() error {
return nil
}
// GetConvertor returns the convertor
func (p *PatternFilter) GetConvertor() Convertor {
return p.convertor
}
// DoFilter filters resources
func (p *PatternFilter) DoFilter(filterItems []models.FilterItem) []models.FilterItem {
items := []models.FilterItem{}
for _, item := range filterItems {
if item.Kind != p.kind {
log.Warningf("unexpected filter item kind, expected: %s, got: %s, skip",
p.kind, item.Kind)
continue
}
matched, err := regexp.MatchString(p.pattern, item.Value)
if err != nil {
log.Errorf("failed to match pattern %s, value %s: %v, skip",
p.pattern, item.Value, err)
continue
}
if !matched {
log.Debugf("%s does not match to the %s filter %s, skip",
item.Value, p.kind, p.pattern)
continue
}
log.Debugf("add %s to the result of %s filter %s",
item.Value, p.kind, p.pattern)
items = append(items, item)
}
return items
}