rename all remaining packages to internal/ (#12418)

This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`

internal/event/rulesmap.go

@@ -0,0 +1,84 @@
+// 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
+
+// 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
+}