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Copy pathrules.go
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113 lines (89 loc) · 2.71 KB
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Copy pathrules.go
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113 lines (89 loc) · 2.71 KB
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package event
import (
"strings"
"github.com/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.ReplaceAll(pattern, "**", "*")
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])
}
// MatchSimple - returns true one of the matching object name in rules.
func (rules Rules) MatchSimple(objectName string) bool {
for pattern := range rules {
if wildcard.MatchSimple(pattern, objectName) {
return true
}
}
return false
}
// 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
}