storj.io/minio@v0.0.0-20230509071714-0cbc90f649b1/pkg/event/rulesmap.go (about)

     1  /*
     2   * MinIO Cloud Storage, (C) 2018 MinIO, Inc.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package event
    18  
    19  // RulesMap - map of rules for every event name.
    20  type RulesMap map[Name]Rules
    21  
    22  // add - adds event names, prefixes, suffixes and target ID to rules map.
    23  func (rulesMap RulesMap) add(eventNames []Name, pattern string, targetID TargetID) {
    24  	rules := make(Rules)
    25  	rules.Add(pattern, targetID)
    26  
    27  	for _, eventName := range eventNames {
    28  		for _, name := range eventName.Expand() {
    29  			rulesMap[name] = rulesMap[name].Union(rules)
    30  		}
    31  	}
    32  }
    33  
    34  // Clone - returns copy of this rules map.
    35  func (rulesMap RulesMap) Clone() RulesMap {
    36  	rulesMapCopy := make(RulesMap)
    37  
    38  	for eventName, rules := range rulesMap {
    39  		rulesMapCopy[eventName] = rules.Clone()
    40  	}
    41  
    42  	return rulesMapCopy
    43  }
    44  
    45  // Add - adds given rules map.
    46  func (rulesMap RulesMap) Add(rulesMap2 RulesMap) {
    47  	for eventName, rules := range rulesMap2 {
    48  		rulesMap[eventName] = rules.Union(rulesMap[eventName])
    49  	}
    50  }
    51  
    52  // Remove - removes given rules map.
    53  func (rulesMap RulesMap) Remove(rulesMap2 RulesMap) {
    54  	for eventName, rules := range rulesMap {
    55  		if nr := rules.Difference(rulesMap2[eventName]); len(nr) != 0 {
    56  			rulesMap[eventName] = nr
    57  		} else {
    58  			delete(rulesMap, eventName)
    59  		}
    60  	}
    61  }
    62  
    63  // MatchSimple - returns true if matching object name and event name in rules map.
    64  func (rulesMap RulesMap) MatchSimple(eventName Name, objectName string) bool {
    65  	return rulesMap[eventName].MatchSimple(objectName)
    66  }
    67  
    68  // Match - returns TargetIDSet matching object name and event name in rules map.
    69  func (rulesMap RulesMap) Match(eventName Name, objectName string) TargetIDSet {
    70  	return rulesMap[eventName].Match(objectName)
    71  }
    72  
    73  // NewRulesMap - creates new rules map with given values.
    74  func NewRulesMap(eventNames []Name, pattern string, targetID TargetID) RulesMap {
    75  	// If pattern is empty, add '*' wildcard to match all.
    76  	if pattern == "" {
    77  		pattern = "*"
    78  	}
    79  
    80  	rulesMap := make(RulesMap)
    81  	rulesMap.add(eventNames, pattern, targetID)
    82  	return rulesMap
    83  }