Sale request

typealias ISVDetails = (
    clientId: String,
    amount: Decimal,
    clientSecret: String,
    sourceCode: String?
)

typealias AADEDetails = (
    receiptId: String,
    mark: String?,
    date: String,
    amountToBePayed: Int,
    sumAmountWithoutTAX: Int,
    vatPercentage: Int,
    sumAmountWithTAX: Decimal,
    tid: Int
)

func createSaleRequest(
    amount: Decimal,
    tipAmount: Decimal?,
    clientTransactionId: String?,
    isvDetails: ISVDetails?,
    numberOfInstallments: Int?,
    fiscalisationData: String?,
    aadeDetails: AADEDetails?,
    aadeProviderId: Int?,
    aadeProviderSignature: String?
) -> URL {

    // Construct sale action URL
    var saleActionURL = URL(string: Constants.saleUrlString)!
    // vivapayclient://pay/v1?callback=interapp-callback&merchantKey=SG23323424EXS3&appId=com.vivawallet.InterAppDemo&action=sale&paymentMethod=CardPresent

    var urlQueryItems: [URLQueryItem] = []

    // Amount
    let amountQueryItem = URLQueryItem(
        name: "amount",
        value: NSDecimalNumber(decimal: amount * 100).intValue.description
    )
    urlQueryItems.append(amountQueryItem)

    // Tip amount
    if let tipAmount = tipAmount {
        let tipQueryItem = URLQueryItem(
            name: "tipAmount",
            value: NSDecimalNumber(decimal: tipAmount * 100).intValue.description
        )
        urlQueryItems.append(tipQueryItem)
    }

    // Payment method
    let paymentMethodQueryItem = URLQueryItem(
        name: "paymentMethod",
        value: "CardPresent"
    )
    urlQueryItems.append(paymentMethodQueryItem)

    // Client transaction ID
    if let clientTransactionId = clientTransactionId,
       !clientTransactionId.isEmpty {
        let transactionIdQueryItem = URLQueryItem(
            name: "clientTransactionId",
            value: clientTransactionId
        )
        urlQueryItems.append(transactionIdQueryItem)
    }

    // Installments
    var hasInstallments = false

    if let preferredInstallments = numberOfInstallments,
       preferredInstallments > 1 {

        let preferredInstallmentsQueryItem = URLQueryItem(
            name: "preferredInstallments",
            value: preferredInstallments.description
        )

        urlQueryItems.append(preferredInstallmentsQueryItem)
        hasInstallments = true
    }

    let hasInstallmentsQueryItem = URLQueryItem(
        name: "withInstallments",
        value: hasInstallments.description
    )
    urlQueryItems.append(hasInstallmentsQueryItem)

    // Fiscalisation data
    // Already encoded String - do not encode again.
    if let fiscalisationData = fiscalisationData,
       !fiscalisationData.isEmpty {

        let fiscalisationDataQueryItem = URLQueryItem(
            name: "fiscalisationData",
            value: fiscalisationData
        )

        urlQueryItems.append(fiscalisationDataQueryItem)
    }

    // ISV
    let isvQueryItems = getISVQueryItems(
        isvDetails: isvDetails
    )

    urlQueryItems.append(contentsOf: isvQueryItems)

    // Show receipt
    let showReceipt = UserDefaults.standard.value(
        forKey: "show_receipt"
    ) as? Bool ?? true

    let showReceiptQueryItem = URLQueryItem(
        name: "show_receipt",
        value: showReceipt.description
    )

    urlQueryItems.append(showReceiptQueryItem)

    // Show transaction result
    let showTransactionResult = UserDefaults.standard.value(
        forKey: "show_transaction_result"
    ) as? Bool ?? true

    let showTransactionResultQueryItem = URLQueryItem(
        name: "show_transaction_result",
        value: showTransactionResult.description
    )

    urlQueryItems.append(showTransactionResultQueryItem)

    // AADE
    let aadeQueryItems = getAADEQueryItems(
        aadeDetails: aadeDetails,
        aadeProviderId: aadeProviderId,
        aadeProviderSignature: aadeProviderSignature
    )

    urlQueryItems.append(contentsOf: aadeQueryItems)

    // Add query parameters
    saleActionURL.append(
        queryItems: urlQueryItems
    )

    return saleActionURL
}

private func getISVQueryItems(
    isvDetails: ISVDetails?
) -> [URLQueryItem] {

    guard let isvDetails = isvDetails else {
        return []
    }

    var urlQueryItems: [URLQueryItem] = []

    let isvClientIdQueryItem = URLQueryItem(
        name: "ISV_clientId",
        value: isvDetails.clientId
    )

    let isvAmountQueryItem = URLQueryItem(
        name: "ISV_amount",
        value: NSDecimalNumber(
            decimal: isvDetails.amount * 100
        ).intValue.description
    )

    let isvClientSecretQueryItem = URLQueryItem(
        name: "ISV_clientSecret",
        value: isvDetails.clientSecret
    )

    urlQueryItems.append(isvClientIdQueryItem)
    urlQueryItems.append(isvAmountQueryItem)
    urlQueryItems.append(isvClientSecretQueryItem)

    if let sourceCode = isvDetails.sourceCode,
       !sourceCode.isEmpty {

        let isvSourceCodeQueryItem = URLQueryItem(
            name: "ISV_sourceCode",
            value: sourceCode
        )

        urlQueryItems.append(isvSourceCodeQueryItem)
    }

    return urlQueryItems
}

private func getAADEQueryItems(
    aadeDetails: AADEDetails?,
    aadeProviderId: Int?,
    aadeProviderSignature: String?
) -> [URLQueryItem] {

    guard let aadeProviderId = aadeProviderId else {
        return []
    }

    var urlQueryItems: [URLQueryItem] = []

    let aadeProviderIdQueryItem = URLQueryItem(
        name: "aadeProviderId",
        value: aadeProviderId.description
    )

    urlQueryItems.append(aadeProviderIdQueryItem)

    if let aadeDetails = aadeDetails {

        let value = "\(aadeDetails.receiptId);" +
                    "\(aadeDetails.mark ?? "");" +
                    "\(aadeDetails.date);" +
                    "\(aadeDetails.amountToBePayed);" +
                    "\(aadeDetails.sumAmountWithoutTAX);" +
                    "\(aadeDetails.vatPercentage);" +
                    "\(aadeDetails.sumAmountWithTAX);" +
                    "\(aadeDetails.tid)"

        let aadeSignatureFieldsQueryItem = URLQueryItem(
            name: "providerSignatureFields",
            value: value
        )

        urlQueryItems.append(aadeSignatureFieldsQueryItem)
    }

    if let aadeProviderSignature = aadeProviderSignature,
       !aadeProviderSignature.isEmpty {

        let aadeProviderSignatureQueryItem = URLQueryItem(
            name: "aadeProviderSignature",
            value: aadeProviderSignature
        )

        urlQueryItems.append(aadeProviderSignatureQueryItem)
    }

    return urlQueryItems
}

// USE LIKE THIS

let saleActionURL = createSaleRequest(
    amount: 12.00,
    tipAmount: 2.00,
    clientTransactionId: nil,
    isvDetails: nil,
    numberOfInstallments: nil,
    fiscalisationData:  "YOUR_ENCODED_FISCALISATION_DATA" // only for merchants using Viva fiscalisation services,
    aadeDetails: nil,
    aadeProviderId: nil,
    aadeProviderSignature: nil
)

(UIApplication.shared.delegate as? AppDelegate)?
    .performInterAppRequest(request: saleActionURL)