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Credit card validation in Swift 3
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| import UIKit | |
| import PlaygroundSupport | |
| //http://stackoverflow.com/questions/72768/how-do-you-detect-credit-card-type-based-on-number | |
| enum CreditCardType { | |
| case visa | |
| case visaElectron | |
| case mastercard | |
| case maestro | |
| case americanExpress | |
| case dinnersClub | |
| case discovery | |
| case jcb | |
| static var all: [CreditCardType] { | |
| return [ | |
| .visa, | |
| .visaElectron, | |
| .mastercard, | |
| .maestro, | |
| .americanExpress, | |
| .dinnersClub, | |
| .discovery, | |
| .jcb | |
| ] | |
| } | |
| var pattern: String { | |
| switch self { | |
| case .visa: return "^4[0-9]{12}(?:[0-9]{3})?$" | |
| case .visaElectron: return "^(4026|417500|4508|4844|491(3|7))" | |
| case .mastercard: return "^5[1-5][0-9]{14}$" | |
| case .maestro: return "^(5018|5020|5038|6304|6759|676[1-3])" | |
| case .americanExpress: return "^3[47][0-9]{13}$" | |
| case .dinnersClub: return "^3(?:0[0-5]|[68][0-9])[0-9]{11}$" | |
| case .discovery: return "^6(?:011|5[0-9]{2})[0-9]{12}$" | |
| case .jcb: return "^(?:2131|1800|35\\d{3})\\d{11}$" | |
| } | |
| } | |
| var exampleValue: String { | |
| switch self { | |
| case .visa: return "4111111111111111" | |
| case .visaElectron: return "4026000000000002" | |
| case .mastercard: return "5538383883833838" | |
| case .maestro: return "501800000009" | |
| case .americanExpress: return "347000000000000" | |
| case .dinnersClub: return "30099999999999" | |
| case .discovery: return "6550000000000000" | |
| case .jcb: return "180000000000000" | |
| } | |
| } | |
| } | |
| struct Validator { | |
| let cardType: CreditCardType | |
| let value: String | |
| func test() -> Bool { | |
| do { | |
| let regex = try NSRegularExpression(pattern: cardType.pattern, options: .caseInsensitive) | |
| return regex.matches(in: value, options: [], range: NSMakeRange(0, value.count)).isEmpty == false | |
| } catch { | |
| return false | |
| } | |
| } | |
| } | |
| let v = Validator(cardType: .americanExpress, value: CreditCardType.americanExpress.exampleValue) | |
| v.test() |
I'll use this Validator and I'll make some improvements. I'll inform you when I finish my library. Thanks for the gist @nunogoncalves 🚀
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Wow! I only noticed the comments now thanks to @emrcftci! Sorry about that.
I realise this is very old and probably won't help anyone but this is being used here: https://github.com/nunogoncalves/iOS-CreditCardForm
More specifically here:
https://github.com/nunogoncalves/iOS-CreditCardForm/blob/master/CreditCard/CreditCardTypeChecker.swift