/
configversion.go
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/
configversion.go
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// Copyright © 2021, 2022 Attestant Limited.
// 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 blockrelay
import (
"fmt"
"strings"
)
// ConfigVersion defines the spec version of the configuration in a response.
type ConfigVersion int
const (
// ConfigVersionV1 is data applicable for the first version of the configuration.
ConfigVersionV1 ConfigVersion = iota
// ConfigVersionV2 is data applicable for the second version of the configuration.
ConfigVersionV2
)
var configVersionStrings = [...]string{
"v1",
"v2",
}
// MarshalJSON implements json.Marshaler.
func (c *ConfigVersion) MarshalJSON() ([]byte, error) {
return []byte(fmt.Sprintf("%q", configVersionStrings[*c])), nil
}
// UnmarshalJSON implements json.Unmarshaler.
func (c *ConfigVersion) UnmarshalJSON(input []byte) error {
var err error
switch strings.ToLower(string(input)) {
case `"v1"`:
*c = ConfigVersionV1
case `"v2"`:
*c = ConfigVersionV2
default:
err = fmt.Errorf("unrecognised config version %s", string(input))
}
return err
}
// String returns a string representation of the version.
func (c *ConfigVersion) String() string {
if int(*c) >= len(configVersionStrings) {
return "unknown"
}
return configVersionStrings[*c]
}