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// Copyright 2021 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package db
import (
"errors"
"fmt"
"regexp"
"strings"
"unicode/utf8"
)
var (
// ErrNameEmpty name is empty error
ErrNameEmpty = errors.New("Name is empty")
// AlphaDashDotPattern characters prohibited in a user name (anything except A-Za-z0-9_.-)
AlphaDashDotPattern = regexp.MustCompile(`[^\w-\.]`)
)
// ErrNameReserved represents a "reserved name" error.
type ErrNameReserved struct {
Name string
}
// IsErrNameReserved checks if an error is a ErrNameReserved.
func IsErrNameReserved(err error) bool {
_, ok := err.(ErrNameReserved)
return ok
}
func (err ErrNameReserved) Error() string {
return fmt.Sprintf("name is reserved [name: %s]", err.Name)
}
// ErrNamePatternNotAllowed represents a "pattern not allowed" error.
type ErrNamePatternNotAllowed struct {
Pattern string
}
// IsErrNamePatternNotAllowed checks if an error is an ErrNamePatternNotAllowed.
func IsErrNamePatternNotAllowed(err error) bool {
_, ok := err.(ErrNamePatternNotAllowed)
return ok
}
func (err ErrNamePatternNotAllowed) Error() string {
return fmt.Sprintf("name pattern is not allowed [pattern: %s]", err.Pattern)
}
// ErrNameCharsNotAllowed represents a "character not allowed in name" error.
type ErrNameCharsNotAllowed struct {
Name string
}
// IsErrNameCharsNotAllowed checks if an error is an ErrNameCharsNotAllowed.
func IsErrNameCharsNotAllowed(err error) bool {
_, ok := err.(ErrNameCharsNotAllowed)
return ok
}
func (err ErrNameCharsNotAllowed) Error() string {
return fmt.Sprintf("User name is invalid [%s]: must be valid alpha or numeric or dash(-_) or dot characters", err.Name)
}
// IsUsableName checks if name is reserved or pattern of name is not allowed
// based on given reserved names and patterns.
// Names are exact match, patterns can be prefix or suffix match with placeholder '*'.
func IsUsableName(names, patterns []string, name string) error {
name = strings.TrimSpace(strings.ToLower(name))
if utf8.RuneCountInString(name) == 0 {
return ErrNameEmpty
}
for i := range names {
if name == names[i] {
return ErrNameReserved{name}
}
}
for _, pat := range patterns {
if pat[0] == '*' && strings.HasSuffix(name, pat[1:]) ||
(pat[len(pat)-1] == '*' && strings.HasPrefix(name, pat[:len(pat)-1])) {
return ErrNamePatternNotAllowed{pat}
}
}
return nil
}
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