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#[macro_use]
extern crate lazy_static;
extern crate regex;
extern crate luhnmod10;
use std::ops::Range;
use regex::Regex;
lazy_static! {
static ref VISAELECTRON_PATTERN_REGEX: Regex = Regex::new(
r"^4(026|17500|405|508|844|91[37])").unwrap();
static ref MAESTRO_PATTERN_REGEX: Regex = Regex::new(
r"^(5(018|0[23]|[68])|6(39|7))").unwrap();
static ref FORBRUGSFORENINGEN_PATTERN_REGEX: Regex = Regex::new(r"^600").unwrap();
static ref DANKORT_PATTERN_REGEX: Regex = Regex::new(r"^5019").unwrap();
static ref VISA_PATTERN_REGEX: Regex = Regex::new(r"^4").unwrap();
static ref MASTERCARD_PATTERN_REGEX: Regex = Regex::new(r"^(5[1-5]|2[2-7])").unwrap();
static ref AMEX_PATTERN_REGEX: Regex = Regex::new(r"^3[47]").unwrap();
static ref DINERSCLUB_PATTERN_REGEX: Regex = Regex::new(r"^3[0689]").unwrap();
static ref DISCOVER_PATTERN_REGEX: Regex = Regex::new(r"^6([045]|22)").unwrap();
static ref UNIONPAY_PATTERN_REGEX: Regex = Regex::new(r"^(62|88)").unwrap();
static ref JCB_PATTERN_REGEX: Regex = Regex::new(r"^35").unwrap();
static ref OTHER_PATTERN_REGEX: Regex = Regex::new(r"^[0-9]+$").unwrap();
}
#[derive(PartialEq)]
pub enum Type {
VisaElectron,
Maestro,
Forbrugsforeningen,
Dankort,
Visa,
MasterCard,
Amex,
DinersClub,
Discover,
UnionPay,
JCB,
#[doc(hidden)]
__NonExhaustive,
}
#[derive(Debug, PartialEq)]
pub enum ValidateError {
InvalidFormat,
InvalidLength,
InvalidLuhn,
UnknownType,
#[doc(hidden)]
__NonExhaustive,
}
impl Type {
pub fn name(&self) -> String {
match *self {
Type::VisaElectron => "visaelectron",
Type::Maestro => "maestro",
Type::Forbrugsforeningen => "forbrugsforeningen",
Type::Dankort => "dankort",
Type::Visa => "visa",
Type::MasterCard => "mastercard",
Type::Amex => "amex",
Type::DinersClub => "dinersclub",
Type::Discover => "discover",
Type::UnionPay => "unionpay",
Type::JCB => "jcb",
_ => "other",
}.to_string()
}
fn pattern<'a>(&self) -> &'a Regex {
match *self {
Type::VisaElectron => &*VISAELECTRON_PATTERN_REGEX,
Type::Maestro => &*MAESTRO_PATTERN_REGEX,
Type::Forbrugsforeningen => &*FORBRUGSFORENINGEN_PATTERN_REGEX,
Type::Dankort => &*DANKORT_PATTERN_REGEX,
Type::Visa => &*VISA_PATTERN_REGEX,
Type::MasterCard => &*MASTERCARD_PATTERN_REGEX,
Type::Amex => &*AMEX_PATTERN_REGEX,
Type::DinersClub => &*DINERSCLUB_PATTERN_REGEX,
Type::Discover => &*DISCOVER_PATTERN_REGEX,
Type::UnionPay => &*UNIONPAY_PATTERN_REGEX,
Type::JCB => &*JCB_PATTERN_REGEX,
_ => &*OTHER_PATTERN_REGEX,
}
}
fn length<'a>(&self) -> Range<usize> {
match *self {
Type::VisaElectron => Range { start: 16, end: 16 },
Type::Maestro => Range { start: 12, end: 19 },
Type::Forbrugsforeningen => Range { start: 16, end: 16 },
Type::Dankort => Range { start: 16, end: 16 },
Type::Visa => Range { start: 13, end: 16 },
Type::MasterCard => Range { start: 16, end: 16 },
Type::Amex => Range { start: 15, end: 15 },
Type::DinersClub => Range { start: 14, end: 14 },
Type::Discover => Range { start: 16, end: 16 },
Type::JCB => Range { start: 16, end: 16 },
Type::UnionPay => Range { start: 16, end: 19 },
_ => Range { start: 12, end: 19 },
}
}
fn all() -> Vec<Type> {
vec![
Type::VisaElectron,
Type::Maestro,
Type::Forbrugsforeningen,
Type::Dankort,
Type::Visa,
Type::MasterCard,
Type::Amex,
Type::DinersClub,
Type::Discover,
Type::UnionPay,
Type::JCB,
]
}
}
#[derive(PartialEq)]
pub struct Validate {
pub card_type: Type,
}
impl Validate {
pub fn from(card_number: &str) -> Result<Validate, ValidateError> {
let card_type = Validate::evaluate_type(&card_number)?;
if Validate::is_length_valid(&card_number, &card_type) == false {
return Err(ValidateError::InvalidLength);
}
if Validate::is_luhn_valid(&card_number) == false {
return Err(ValidateError::InvalidLuhn);
}
Ok(Validate {
card_type: card_type,
})
}
fn evaluate_type(card_number: &str) -> Result<Type, ValidateError> {
if OTHER_PATTERN_REGEX.is_match(&card_number) {
for card in Type::all() {
if card.pattern().is_match(&card_number) {
return Ok(card);
}
}
Err(ValidateError::UnknownType)
} else {
Err(ValidateError::InvalidFormat)
}
}
fn is_length_valid(card_number: &str, card_type: &Type) -> bool {
let size = card_number.len();
let range = card_type.length();
size >= range.start && size <= range.end
}
fn is_luhn_valid(card_number: &str) -> bool {
luhnmod10::valid(&card_number)
}
}