credit card types

/**
 * Different kinds of credit cards.
 *
 * Reference from [credit-card-type](https://github.com/braintree/credit-card-type)
 */
sealed class CreditCardType {
    abstract val name: String
    abstract val prefixPattern: Regex
    abstract val gaps: IntArray
    abstract val lengths: IntArray
    abstract val securityCodeLength: Int

    companion object {
        private val types: List<CreditCardType> = listOf(Visa, MasterCard, AmericanExpress, DinersClub, Discovery, Jcb, UnionPay, Maestro)

        fun matchCardNumber(cardNumber: String): List<CreditCardType> = types.filter { type -> type.prefixPattern.find(cardNumber) != null }

        fun matchName(name: String): CreditCardType = types.first { type -> type.name == name }

        fun getIcon(cardType: CreditCardType): Int = when (cardType) {
            Visa -> R.drawable.ic_credit_card_visa
            MasterCard -> R.drawable.ic_credit_card_mastercard
            AmericanExpress -> R.drawable.ic_credit_card_amerian_express
            DinersClub -> R.drawable.ic_credit_card_dinerclub
            Discovery -> R.drawable.ic_credit_card_discover
            Jcb -> R.drawable.ic_credit_card_jcb
            UnionPay -> R.drawable.ic_credit_card_unionpay
            Maestro -> R.drawable.ic_credit_card_maestro
        }

        fun getSmallIcon(cardType: CreditCardType): Int = when (cardType) {
            Visa -> R.drawable.ic_credit_card_visa_small
            MasterCard -> R.drawable.ic_credit_card_mastercard_small
            AmericanExpress -> R.drawable.ic_credit_card_amerian_express_small
            DinersClub -> R.drawable.ic_credit_card_dinerclub_small
            Discovery -> R.drawable.ic_credit_card_discover_small
            Jcb -> R.drawable.ic_credit_card_jcb_small
            UnionPay -> R.drawable.ic_credit_card_unionpay_small
            Maestro -> R.drawable.ic_credit_card_maestro_small
        }
    }
}

object Visa : CreditCardType() {
    override val name: String = "visa"
    override val prefixPattern: Regex = Regex("""^4""")
    override val gaps: IntArray = intArrayOf(4, 8, 12)
    override val lengths: IntArray = intArrayOf(16, 18, 19)
    override val securityCodeLength: Int = 3
}

object MasterCard : CreditCardType() {
    override val name: String = "master-card"
    override val prefixPattern: Regex = Regex("""^(5[1-5]|222[1-9]|2[3-6]|27[0-1]|2720)""")
    override val gaps: IntArray = intArrayOf(4, 8, 12)
    override val lengths: IntArray = intArrayOf(16)
    override val securityCodeLength: Int = 3
}

object AmericanExpress : CreditCardType() {
    override val name: String = "american-express"
    override val prefixPattern: Regex = Regex("""^3[47]""")
    override val gaps: IntArray = intArrayOf(4, 10)
    override val lengths: IntArray = intArrayOf(15)
    override val securityCodeLength: Int = 4
}

object DinersClub : CreditCardType() {
    override val name: String = "diners-club"
    override val prefixPattern: Regex = Regex("""^3(0[0-5]|[689])""")
    override val gaps: IntArray = intArrayOf(4, 10)
    override val lengths: IntArray = intArrayOf(14, 16, 19)
    override val securityCodeLength: Int = 3
}

object Discovery : CreditCardType() {
    override val name: String = "discover"
    override val prefixPattern: Regex = Regex("""^(6011|65|64[4-9])""")
    override val gaps: IntArray = intArrayOf(4, 8, 12)
    override val lengths: IntArray = intArrayOf(16, 19)
    override val securityCodeLength: Int = 3
}

object Jcb : CreditCardType() {
    override val name: String = "jcb"
    override val prefixPattern: Regex = Regex("""^(2131|1800|35)""")
    override val gaps: IntArray = intArrayOf(4, 8, 12)
    override val lengths: IntArray = intArrayOf(16)
    override val securityCodeLength: Int = 3
}

object UnionPay : CreditCardType() {
    override val name: String = "unionpay"
    override val prefixPattern: Regex = Regex("""^(((620|(621(?!83|88|98|99))|622(?!06|018)|62[3-6]|627[02,06,07]|628(?!0|1)|629[1,2]))\d*|622018\d{12})""")
    override val gaps: IntArray = intArrayOf(4, 8, 12)
    override val lengths: IntArray = intArrayOf(16, 17, 18, 19)
    override val securityCodeLength: Int = 3
}

object Maestro : CreditCardType() {
    override val name: String = "maestro"
    override val prefixPattern: Regex = Regex("""^(5[06-9]|6[37])""")
    override val gaps: IntArray = intArrayOf(4, 8, 12)
    override val lengths: IntArray = intArrayOf(12, 13, 14, 15, 16, 17, 18, 19)
    override val securityCodeLength: Int = 3
}