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type.go
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type.go
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// Copyright 2022 Criticality Score Authors
//
// 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
//
// https://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 marker
import (
"bytes"
"errors"
"net/url"
"path"
"strings"
)
type Type int
const (
TypeFull = Type(iota)
TypeFile
TypeDir
)
var ErrorUnknownType = errors.New("unknown marker type")
// String implements the fmt.Stringer interface.
func (t Type) String() string {
text, err := t.MarshalText()
if err != nil {
return ""
}
return string(text)
}
// MarshalText implements the encoding.TextMarshaler interface.
func (t Type) MarshalText() ([]byte, error) {
switch t {
case TypeFull:
return []byte("full"), nil
case TypeFile:
return []byte("file"), nil
case TypeDir:
return []byte("dir"), nil
default:
return []byte{}, ErrorUnknownType
}
}
// UnmarshalText implements the encoding.TextUnmarshaler interface.
func (t *Type) UnmarshalText(text []byte) error {
switch {
case bytes.Equal(text, []byte("full")):
*t = TypeFull
case bytes.Equal(text, []byte("file")):
*t = TypeFile
case bytes.Equal(text, []byte("dir")):
*t = TypeDir
default:
return ErrorUnknownType
}
return nil
}
func (t Type) transform(p string) string {
if t == TypeFull {
return p
}
// Is this a bucket URL?
if u, err := url.Parse(p); err == nil && u.IsAbs() {
if u.Scheme == "file" && u.Host == "" {
p = u.Path
} else {
p = strings.TrimPrefix(u.Path, "/")
}
}
if t == TypeDir {
return path.Dir(p)
}
return p
}