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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 condition
import (
"encoding/json"
"fmt"
"strings"
)
const (
// names
stringEquals = "StringEquals"
stringNotEquals = "StringNotEquals"
stringEqualsIgnoreCase = "StringEqualsIgnoreCase"
stringNotEqualsIgnoreCase = "StringNotEqualsIgnoreCase"
stringLike = "StringLike"
stringNotLike = "StringNotLike"
binaryEquals = "BinaryEquals"
ipAddress = "IpAddress"
notIPAddress = "NotIpAddress"
null = "Null"
boolean = "Bool"
numericEquals = "NumericEquals"
numericNotEquals = "NumericNotEquals"
numericLessThan = "NumericLessThan"
numericLessThanEquals = "NumericLessThanEquals"
numericGreaterThan = "NumericGreaterThan"
numericGreaterThanIfExists = "NumericGreaterThanIfExists"
numericGreaterThanEquals = "NumericGreaterThanEquals"
dateEquals = "DateEquals"
dateNotEquals = "DateNotEquals"
dateLessThan = "DateLessThan"
dateLessThanEquals = "DateLessThanEquals"
dateGreaterThan = "DateGreaterThan"
dateGreaterThanEquals = "DateGreaterThanEquals"
// qualifiers
// refer https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_multi-value-conditions.html#reference_policies_multi-key-or-value-conditions
forAllValues = "ForAllValues"
forAnyValue = "ForAnyValue"
)
var names = map[string]struct{}{
stringEquals: {},
stringNotEquals: {},
stringEqualsIgnoreCase: {},
stringNotEqualsIgnoreCase: {},
binaryEquals: {},
stringLike: {},
stringNotLike: {},
ipAddress: {},
notIPAddress: {},
null: {},
boolean: {},
numericEquals: {},
numericNotEquals: {},
numericLessThan: {},
numericLessThanEquals: {},
numericGreaterThan: {},
numericGreaterThanIfExists: {},
numericGreaterThanEquals: {},
dateEquals: {},
dateNotEquals: {},
dateLessThan: {},
dateLessThanEquals: {},
dateGreaterThan: {},
dateGreaterThanEquals: {},
}
var qualifiers = map[string]struct{}{
forAllValues: {},
forAnyValue: {},
}
type name struct {
qualifier string
name string
}
func (n name) String() string {
if n.qualifier != "" {
return n.qualifier + ":" + n.name
}
return n.name
}
// IsValid - checks if name is valid or not.
func (n name) IsValid() bool {
if n.qualifier != "" {
if _, found := qualifiers[n.qualifier]; !found {
return false
}
}
_, found := names[n.name]
return found
}
// MarshalJSON - encodes name to JSON data.
func (n name) MarshalJSON() ([]byte, error) {
if !n.IsValid() {
return nil, fmt.Errorf("invalid name %v", n)
}
return json.Marshal(n.String())
}
// UnmarshalJSON - decodes JSON data to condition name.
func (n *name) UnmarshalJSON(data []byte) error {
var s string
if err := json.Unmarshal(data, &s); err != nil {
return err
}
parsedName, err := parseName(s)
if err != nil {
return err
}
*n = parsedName
return nil
}
func parseName(s string) (name, error) {
tokens := strings.Split(s, ":")
var n name
switch len(tokens) {
case 0, 1:
n = name{name: s}
case 2:
n = name{qualifier: tokens[0], name: tokens[1]}
default:
return n, fmt.Errorf("invalid condition name '%v'", s)
}
if n.IsValid() {
return n, nil
}
return n, fmt.Errorf("invalid condition name '%v'", s)
}
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