storj.io/minio@v0.0.0-20230509071714-0cbc90f649b1/pkg/bucket/policy/condition/name.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 condition
    18  
    19  import (
    20  	"encoding/json"
    21  	"fmt"
    22  )
    23  
    24  type name string
    25  
    26  const (
    27  	stringEquals              name = "StringEquals"
    28  	stringNotEquals                = "StringNotEquals"
    29  	stringEqualsIgnoreCase         = "StringEqualsIgnoreCase"
    30  	stringNotEqualsIgnoreCase      = "StringNotEqualsIgnoreCase"
    31  	stringLike                     = "StringLike"
    32  	stringNotLike                  = "StringNotLike"
    33  	binaryEquals                   = "BinaryEquals"
    34  	ipAddress                      = "IpAddress"
    35  	notIPAddress                   = "NotIpAddress"
    36  	null                           = "Null"
    37  	boolean                        = "Bool"
    38  	numericEquals                  = "NumericEquals"
    39  	numericNotEquals               = "NumericNotEquals"
    40  	numericLessThan                = "NumericLessThan"
    41  	numericLessThanEquals          = "NumericLessThanEquals"
    42  	numericGreaterThan             = "NumericGreaterThan"
    43  	numericGreaterThanEquals       = "NumericGreaterThanEquals"
    44  	dateEquals                     = "DateEquals"
    45  	dateNotEquals                  = "DateNotEquals"
    46  	dateLessThan                   = "DateLessThan"
    47  	dateLessThanEquals             = "DateLessThanEquals"
    48  	dateGreaterThan                = "DateGreaterThan"
    49  	dateGreaterThanEquals          = "DateGreaterThanEquals"
    50  )
    51  
    52  var supportedConditions = []name{
    53  	stringEquals,
    54  	stringNotEquals,
    55  	stringEqualsIgnoreCase,
    56  	stringNotEqualsIgnoreCase,
    57  	binaryEquals,
    58  	stringLike,
    59  	stringNotLike,
    60  	ipAddress,
    61  	notIPAddress,
    62  	null,
    63  	boolean,
    64  	numericEquals,
    65  	numericNotEquals,
    66  	numericLessThan,
    67  	numericLessThanEquals,
    68  	numericGreaterThan,
    69  	numericGreaterThanEquals,
    70  	dateEquals,
    71  	dateNotEquals,
    72  	dateLessThan,
    73  	dateLessThanEquals,
    74  	dateGreaterThan,
    75  	dateGreaterThanEquals,
    76  	// Add new conditions here.
    77  }
    78  
    79  // IsValid - checks if name is valid or not.
    80  func (n name) IsValid() bool {
    81  	for _, supn := range supportedConditions {
    82  		if n == supn {
    83  			return true
    84  		}
    85  	}
    86  
    87  	return false
    88  }
    89  
    90  // MarshalJSON - encodes name to JSON data.
    91  func (n name) MarshalJSON() ([]byte, error) {
    92  	if !n.IsValid() {
    93  		return nil, fmt.Errorf("invalid name %v", n)
    94  	}
    95  
    96  	return json.Marshal(string(n))
    97  }
    98  
    99  // UnmarshalJSON - decodes JSON data to condition name.
   100  func (n *name) UnmarshalJSON(data []byte) error {
   101  	var s string
   102  	if err := json.Unmarshal(data, &s); err != nil {
   103  		return err
   104  	}
   105  
   106  	parsedName, err := parseName(s)
   107  	if err != nil {
   108  		return err
   109  	}
   110  
   111  	*n = parsedName
   112  	return nil
   113  }
   114  
   115  func parseName(s string) (name, error) {
   116  	n := name(s)
   117  
   118  	if n.IsValid() {
   119  		return n, nil
   120  	}
   121  
   122  	return n, fmt.Errorf("invalid condition name '%v'", s)
   123  }