artcraft/src/validations/username.rs

use crate::AnyhowResult;
use regex::Regex;

pub fn validate_username(username: &str) -> Result<(), String> {
  lazy_static! {
    static ref USERNAME_REGEX: Regex = {
      Regex::new(r"^[A-Za-z0-9_\-]{3,16}$").expect("should be valid regex")
    };
  }

  if username.len() < 3 {
    return Err("username is too short".to_string());
  }

  if username.len() > 16 {
    return Err("username is too long".to_string());
  }

  if !USERNAME_REGEX.is_match(username) {
    return Err("invalid username characters".to_string());
  }

  Ok(())
}

/*pub fn validate_display_name(display_name: &str) -> Result<(), String> {
  lazy_static! {
    static ref DISPLAY_NAME_REGEX: Regex = {
      Regex::new(r"^\w{3,16}$").expect("should be valid regex")
    };
  }

  if username.len() < 3 {
    return Err("display name is too short".to_string());
  }

  if username.len() > 16 {
    return Err("display name is too long".to_string());
  }

  if !DISPLAY_NAME_REGEX.is_match(username) {
    return Err("invalid display name".to_string());
  }

  Ok(())
}*/

#[cfg(test)]
mod tests {
  use crate::validations::username::validate_username;

  #[test]
  fn test_valid_usernames() {
    assert!(validate_username("echelon").is_ok());
    assert!(validate_username("dr_mario").is_ok());
    assert!(validate_username("Foo1234").is_ok());
    assert!(validate_username("mr-person").is_ok());
  }

  #[test]
  fn test_invalid_usernames() {
    assert!(validate_username("").is_err());
    assert!(validate_username("&&&&").is_err());
    assert!(validate_username("........").is_err());
    assert!(validate_username("really-long-username-that-is-too-long").is_err());
  }
}