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92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package config
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import (
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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)
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// BoolFlag - wrapper bool type.
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type BoolFlag bool
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// String - returns string of BoolFlag.
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func (bf BoolFlag) String() string {
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if bf {
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return "on"
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}
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return "off"
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}
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// MarshalJSON - converts BoolFlag into JSON data.
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func (bf BoolFlag) MarshalJSON() ([]byte, error) {
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return json.Marshal(bf.String())
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}
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// UnmarshalJSON - parses given data into BoolFlag.
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func (bf *BoolFlag) UnmarshalJSON(data []byte) (err error) {
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var s string
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if err = json.Unmarshal(data, &s); err == nil {
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b := BoolFlag(true)
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if s == "" {
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// Empty string is treated as valid.
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*bf = b
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} else if b, err = ParseBoolFlag(s); err == nil {
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*bf = b
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}
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}
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return err
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}
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// FormatBool prints stringified version of boolean.
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func FormatBool(b bool) string {
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if b {
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return "on"
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}
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return "off"
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}
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// ParseBool returns the boolean value represented by the string.
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// It accepts 1, t, T, TRUE, true, True, 0, f, F, FALSE, false, False.
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// Any other value returns an error.
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func ParseBool(str string) (bool, error) {
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switch str {
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case "1", "t", "T", "true", "TRUE", "True", "on", "ON", "On":
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return true, nil
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case "0", "f", "F", "false", "FALSE", "False", "off", "OFF", "Off":
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return false, nil
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}
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if strings.EqualFold(str, "enabled") {
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return true, nil
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}
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if strings.EqualFold(str, "disabled") {
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return false, nil
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}
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return false, fmt.Errorf("ParseBool: parsing '%s': %w", str, strconv.ErrSyntax)
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}
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// ParseBoolFlag - parses string into BoolFlag.
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func ParseBoolFlag(s string) (bf BoolFlag, err error) {
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b, err := ParseBool(s)
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return BoolFlag(b), err
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}
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