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Copy pathrules.go
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102 lines (79 loc) · 2.33 KB
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Copy pathrules.go
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102 lines (79 loc) · 2.33 KB
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/*
* Minio Cloud Storage, (C) 2018 Minio, 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 event
import (
"strings"
"github.com/minio/minio/pkg/wildcard"
)
// NewPattern - create new pattern for prefix/suffix.
func NewPattern(prefix, suffix string) (pattern string) {
if prefix != "" {
if !strings.HasSuffix(prefix, "*") {
prefix += "*"
}
pattern = prefix
}
if suffix != "" {
if !strings.HasPrefix(suffix, "*") {
suffix = "*" + suffix
}
pattern += suffix
}
pattern = strings.Replace(pattern, "**", "*", -1)
return pattern
}
// Rules - event rules
type Rules map[string]TargetIDSet
// Add - adds pattern and target ID.
func (rules Rules) Add(pattern string, targetID TargetID) {
rules[pattern] = NewTargetIDSet(targetID).Union(rules[pattern])
}
// Match - returns TargetIDSet matching object name in rules.
func (rules Rules) Match(objectName string) TargetIDSet {
targetIDs := NewTargetIDSet()
for pattern, targetIDSet := range rules {
if wildcard.MatchSimple(pattern, objectName) {
targetIDs = targetIDs.Union(targetIDSet)
}
}
return targetIDs
}
// Clone - returns copy of this rules.
func (rules Rules) Clone() Rules {
rulesCopy := make(Rules)
for pattern, targetIDSet := range rules {
rulesCopy[pattern] = targetIDSet.Clone()
}
return rulesCopy
}
// Union - returns union with given rules as new rules.
func (rules Rules) Union(rules2 Rules) Rules {
nrules := rules.Clone()
for pattern, targetIDSet := range rules2 {
nrules[pattern] = nrules[pattern].Union(targetIDSet)
}
return nrules
}
// Difference - returns diffrence with given rules as new rules.
func (rules Rules) Difference(rules2 Rules) Rules {
nrules := make(Rules)
for pattern, targetIDSet := range rules {
if nv := targetIDSet.Difference(rules2[pattern]); len(nv) > 0 {
nrules[pattern] = nv
}
}
return nrules
}