81 lines
2.4 KiB
Go
81 lines
2.4 KiB
Go
// Copyright 2020-2021 Buf Technologies, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package uuidutil
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import (
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"fmt"
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"github.com/gofrs/uuid"
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)
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// New returns a new random UUIDv4.
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func New() (uuid.UUID, error) {
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id, err := uuid.NewV4()
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if err != nil {
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return uuid.Nil, err
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}
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return id, nil
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}
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// ToDashless returns the uuid without dashes.
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func ToDashless(id uuid.UUID) (string, error) {
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s := id.String()
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if s[8] != '-' {
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return "", fmt.Errorf("expected - at char 9: %q", s)
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}
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if s[13] != '-' {
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return "", fmt.Errorf("expected - at char 14: %q", s)
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}
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if s[18] != '-' {
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return "", fmt.Errorf("expected - at char 19: %q", s)
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}
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if s[23] != '-' {
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return "", fmt.Errorf("expected - at char 24: %q", s)
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}
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return s[0:8] + s[9:13] + s[14:18] + s[19:23] + s[24:], nil
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}
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// FromString returns the uuid from the string.
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//
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// As opposed to uuid.FromString, this only accepts uuids with dashes.
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// Always use this instead of uuid.FromString.
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func FromString(s string) (uuid.UUID, error) {
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if len(s) != 36 {
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return uuid.Nil, fmt.Errorf("expected uuid to be of length 36 but was %d: %s", len(s), s)
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}
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return uuid.FromString(s)
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}
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// FromDashless returns the dashless uuid with dashes.
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func FromDashless(dashless string) (uuid.UUID, error) {
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if len(dashless) != 32 {
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return uuid.Nil, fmt.Errorf("expected dashless uuid to be of length 32 but was %d: %s", len(dashless), dashless)
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}
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// FromString accepts both dashless and regular, we do this because we need to add our own FromString that does not accept dashless
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return FromString(dashless[0:8] + "-" + dashless[8:12] + "-" + dashless[12:16] + "-" + dashless[16:20] + "-" + dashless[20:])
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}
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// Validate determines if the given UUID string is valid.
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func Validate(s string) error {
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_, err := FromString(s)
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return err
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}
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// ValidateDashless validates the dashless uuid is valid.
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func ValidateDashless(dashless string) error {
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_, err := FromDashless(dashless)
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return err
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}
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