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PDS software with bells & whistles you didn’t even know you needed. will move this to its own account when ready.
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7.9 kB · 250 lines
Rust
at commit f95bdcae
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251pub const MAX_EMAIL_LENGTH: usize = 254;pub const MAX_LOCAL_PART_LENGTH: usize = 64;pub const MAX_DOMAIN_LENGTH: usize = 253;pub const MAX_DOMAIN_LABEL_LENGTH: usize = 63;const EMAIL_LOCAL_SPECIAL_CHARS: &str = ".!#$%&'*+/=?^_`{|}~-";
pub const MIN_HANDLE_LENGTH: usize = 3;pub const MAX_HANDLE_LENGTH: usize = 253;
#[derive(Debug, PartialEq)]pub enum HandleValidationError { Empty, TooShort, TooLong, InvalidCharacters, StartsWithInvalidChar, EndsWithInvalidChar, ContainsSpaces,}
impl std::fmt::Display for HandleValidationError { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { match self { Self::Empty => write!(f, "Handle cannot be empty"), Self::TooShort => write!( f, "Handle must be at least {} characters", MIN_HANDLE_LENGTH ), Self::TooLong => write!( f, "Handle exceeds maximum length of {} characters", MAX_HANDLE_LENGTH ), Self::InvalidCharacters => write!( f, "Handle contains invalid characters. Only alphanumeric, hyphens, and underscores are allowed" ), Self::StartsWithInvalidChar => { write!(f, "Handle cannot start with a hyphen or underscore") } Self::EndsWithInvalidChar => write!(f, "Handle cannot end with a hyphen or underscore"), Self::ContainsSpaces => write!(f, "Handle cannot contain spaces"), } }}
pub fn validate_short_handle(handle: &str) -> Result<String, HandleValidationError> { let handle = handle.trim();
if handle.is_empty() { return Err(HandleValidationError::Empty); }
if handle.contains(' ') || handle.contains('\t') || handle.contains('\n') { return Err(HandleValidationError::ContainsSpaces); }
if handle.len() < MIN_HANDLE_LENGTH { return Err(HandleValidationError::TooShort); }
if handle.len() > MAX_HANDLE_LENGTH { return Err(HandleValidationError::TooLong); }
if let Some(first_char) = handle.chars().next() && (first_char == '-' || first_char == '_') { return Err(HandleValidationError::StartsWithInvalidChar); }
if let Some(last_char) = handle.chars().last() && (last_char == '-' || last_char == '_') { return Err(HandleValidationError::EndsWithInvalidChar); }
for c in handle.chars() { if !c.is_ascii_alphanumeric() && c != '-' && c != '_' { return Err(HandleValidationError::InvalidCharacters); } }
Ok(handle.to_lowercase())}
pub fn is_valid_email(email: &str) -> bool { let email = email.trim(); if email.is_empty() || email.len() > MAX_EMAIL_LENGTH { return false; } let parts: Vec<&str> = email.rsplitn(2, '@').collect(); if parts.len() != 2 { return false; } let domain = parts[0]; let local = parts[1]; if local.is_empty() || local.len() > MAX_LOCAL_PART_LENGTH { return false; } if local.starts_with('.') || local.ends_with('.') { return false; } if local.contains("..") { return false; } for c in local.chars() { if !c.is_ascii_alphanumeric() && !EMAIL_LOCAL_SPECIAL_CHARS.contains(c) { return false; } } if domain.is_empty() || domain.len() > MAX_DOMAIN_LENGTH { return false; } if !domain.contains('.') { return false; } for label in domain.split('.') { if label.is_empty() || label.len() > MAX_DOMAIN_LABEL_LENGTH { return false; } if label.starts_with('-') || label.ends_with('-') { return false; } for c in label.chars() { if !c.is_ascii_alphanumeric() && c != '-' { return false; } } } true}
#[cfg(test)]mod tests { use super::*;
#[test] fn test_valid_handles() { assert_eq!(validate_short_handle("alice"), Ok("alice".to_string())); assert_eq!(validate_short_handle("bob123"), Ok("bob123".to_string())); assert_eq!( validate_short_handle("user-name"), Ok("user-name".to_string()) ); assert_eq!( validate_short_handle("user_name"), Ok("user_name".to_string()) ); assert_eq!( validate_short_handle("UPPERCASE"), Ok("uppercase".to_string()) ); assert_eq!( validate_short_handle("MixedCase123"), Ok("mixedcase123".to_string()) ); assert_eq!(validate_short_handle("abc"), Ok("abc".to_string())); }
#[test] fn test_invalid_handles() { assert_eq!(validate_short_handle(""), Err(HandleValidationError::Empty)); assert_eq!( validate_short_handle(" "), Err(HandleValidationError::Empty) ); assert_eq!( validate_short_handle("ab"), Err(HandleValidationError::TooShort) ); assert_eq!( validate_short_handle("a"), Err(HandleValidationError::TooShort) ); assert_eq!( validate_short_handle("test spaces"), Err(HandleValidationError::ContainsSpaces) ); assert_eq!( validate_short_handle("test\ttab"), Err(HandleValidationError::ContainsSpaces) ); assert_eq!( validate_short_handle("-starts"), Err(HandleValidationError::StartsWithInvalidChar) ); assert_eq!( validate_short_handle("_starts"), Err(HandleValidationError::StartsWithInvalidChar) ); assert_eq!( validate_short_handle("ends-"), Err(HandleValidationError::EndsWithInvalidChar) ); assert_eq!( validate_short_handle("ends_"), Err(HandleValidationError::EndsWithInvalidChar) ); assert_eq!( validate_short_handle("test@user"), Err(HandleValidationError::InvalidCharacters) ); assert_eq!( validate_short_handle("test!user"), Err(HandleValidationError::InvalidCharacters) ); assert_eq!( validate_short_handle("test.user"), Err(HandleValidationError::InvalidCharacters) ); }
#[test] fn test_handle_trimming() { assert_eq!(validate_short_handle(" alice "), Ok("alice".to_string())); }
#[test] fn test_valid_emails() { assert!(is_valid_email("user@example.com")); assert!(is_valid_email("user.name@example.com")); assert!(is_valid_email("user+tag@example.com")); assert!(is_valid_email("user@sub.example.com")); assert!(is_valid_email("USER@EXAMPLE.COM")); assert!(is_valid_email("user123@example123.com")); assert!(is_valid_email("a@b.co")); } #[test] fn test_invalid_emails() { assert!(!is_valid_email("")); assert!(!is_valid_email("user")); assert!(!is_valid_email("user@")); assert!(!is_valid_email("@example.com")); assert!(!is_valid_email("user@example")); assert!(!is_valid_email("user@@example.com")); assert!(!is_valid_email("user@.example.com")); assert!(!is_valid_email("user@example..com")); assert!(!is_valid_email(".user@example.com")); assert!(!is_valid_email("user.@example.com")); assert!(!is_valid_email("user..name@example.com")); assert!(!is_valid_email("user@-example.com")); assert!(!is_valid_email("user@example-.com")); } #[test] fn test_trimmed_whitespace() { assert!(is_valid_email(" user@example.com ")); }}