marky

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user.go (693B)

      1 package internal
      2 
      3 import (
      4 	"errors"
      5 )
      6 
      7 // User represents an application user.
      8 // The username must be unique and contain only lowercase letters and digits.
      9 type User struct {
     10 	ID                int64
     11 	Username          string
     12 	EncryptedPassword string
     13 	APIToken          *string
     14 }
     15 
     16 // ValidateUsername verifies that the username is non-empty and contains only
     17 // lowercase ASCII letters and digits.
     18 func ValidateUsername(u string) error {
     19 	if u == "" {
     20 		return errors.New("username is required")
     21 	}
     22 	for i := 0; i < len(u); i++ {
     23 		c := u[i]
     24 		if (c < 'a' || c > 'z') && (c < '0' || c > '9') {
     25 			return errors.New("username must be lowercase letters and digits only")
     26 		}
     27 	}
     28 	return nil
     29 }