frostfs-s3-gw/pkg/event/rulesmap.go

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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
// RulesMap - map of rules for every event name.
type RulesMap map[Name]Rules
// add - adds event names, prefixes, suffixes and target ID to rules map.
func (rulesMap RulesMap) add(eventNames []Name, pattern string, targetID TargetID) {
rules := make(Rules)
rules.Add(pattern, targetID)
for _, eventName := range eventNames {
for _, name := range eventName.Expand() {
rulesMap[name] = rulesMap[name].Union(rules)
}
}
}
// Clone - returns copy of this rules map.
func (rulesMap RulesMap) Clone() RulesMap {
rulesMapCopy := make(RulesMap)
for eventName, rules := range rulesMap {
rulesMapCopy[eventName] = rules.Clone()
}
return rulesMapCopy
}
// Add - adds given rules map.
func (rulesMap RulesMap) Add(rulesMap2 RulesMap) {
for eventName, rules := range rulesMap2 {
rulesMap[eventName] = rules.Union(rulesMap[eventName])
}
}
// Remove - removes given rules map.
func (rulesMap RulesMap) Remove(rulesMap2 RulesMap) {
for eventName, rules := range rulesMap {
if nr := rules.Difference(rulesMap2[eventName]); len(nr) != 0 {
rulesMap[eventName] = nr
} else {
delete(rulesMap, eventName)
}
}
}
// MatchSimple - returns true if matching object name and event name in rules map.
func (rulesMap RulesMap) MatchSimple(eventName Name, objectName string) bool {
return rulesMap[eventName].MatchSimple(objectName)
}
// Match - returns TargetIDSet matching object name and event name in rules map.
func (rulesMap RulesMap) Match(eventName Name, objectName string) TargetIDSet {
return rulesMap[eventName].Match(objectName)
}
// NewRulesMap - creates new rules map with given values.
func NewRulesMap(eventNames []Name, pattern string, targetID TargetID) RulesMap {
// If pattern is empty, add '*' wildcard to match all.
if pattern == "" {
pattern = "*"
}
rulesMap := make(RulesMap)
rulesMap.add(eventNames, pattern, targetID)
return rulesMap
}