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112 lines
2.6 KiB
112 lines
2.6 KiB
/*
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* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package event
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import (
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"strings"
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"github.com/minio/minio/pkg/wildcard"
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)
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// NewPattern - create new pattern for prefix/suffix.
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func NewPattern(prefix, suffix string) (pattern string) {
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if prefix != "" {
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if !strings.HasSuffix(prefix, "*") {
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prefix += "*"
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}
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pattern = prefix
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}
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if suffix != "" {
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if !strings.HasPrefix(suffix, "*") {
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suffix = "*" + suffix
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}
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pattern += suffix
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}
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pattern = strings.Replace(pattern, "**", "*", -1)
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return pattern
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}
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// Rules - event rules
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type Rules map[string]TargetIDSet
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// Add - adds pattern and target ID.
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func (rules Rules) Add(pattern string, targetID TargetID) {
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rules[pattern] = NewTargetIDSet(targetID).Union(rules[pattern])
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}
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// MatchSimple - returns true one of the matching object name in rules.
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func (rules Rules) MatchSimple(objectName string) bool {
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for pattern := range rules {
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if wildcard.MatchSimple(pattern, objectName) {
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return true
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}
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}
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return false
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}
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// Match - returns TargetIDSet matching object name in rules.
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func (rules Rules) Match(objectName string) TargetIDSet {
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targetIDs := NewTargetIDSet()
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for pattern, targetIDSet := range rules {
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if wildcard.MatchSimple(pattern, objectName) {
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targetIDs = targetIDs.Union(targetIDSet)
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}
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}
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return targetIDs
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}
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// Clone - returns copy of this rules.
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func (rules Rules) Clone() Rules {
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rulesCopy := make(Rules)
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for pattern, targetIDSet := range rules {
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rulesCopy[pattern] = targetIDSet.Clone()
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}
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return rulesCopy
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}
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// Union - returns union with given rules as new rules.
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func (rules Rules) Union(rules2 Rules) Rules {
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nrules := rules.Clone()
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for pattern, targetIDSet := range rules2 {
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nrules[pattern] = nrules[pattern].Union(targetIDSet)
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}
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return nrules
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}
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// Difference - returns diffrence with given rules as new rules.
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func (rules Rules) Difference(rules2 Rules) Rules {
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nrules := make(Rules)
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for pattern, targetIDSet := range rules {
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if nv := targetIDSet.Difference(rules2[pattern]); len(nv) > 0 {
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nrules[pattern] = nv
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}
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}
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return nrules
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}
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