diff options
Diffstat (limited to 'modules/validation/helpers.go')
| -rw-r--r-- | modules/validation/helpers.go | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/modules/validation/helpers.go b/modules/validation/helpers.go index 484b12b2a2..8e49c7855e 100644 --- a/modules/validation/helpers.go +++ b/modules/validation/helpers.go @@ -91,3 +91,15 @@ func IsValidExternalTrackerURLFormat(uri string) bool { return true } + +var ( + validUsernamePattern = regexp.MustCompile(`^[\da-zA-Z][-.\w]*$`) + invalidUsernamePattern = regexp.MustCompile(`[-._]{2,}|[-._]$`) // No consecutive or trailing non-alphanumeric chars +) + +// IsValidUsername checks if username is valid +func IsValidUsername(name string) bool { + // It is difficult to find a single pattern that is both readable and effective, + // but it's easier to use positive and negative checks. + return validUsernamePattern.MatchString(name) && !invalidUsernamePattern.MatchString(name) +} |