expedia_payments_api.h

/*
 * expedia_payments_api.h
 *
 *  Created on: Sep 18, 2020
 *      Author: moustafa
 */

#ifndef EXPEDIA_PAYMENTS_API_H_
#define EXPEDIA_PAYMENTS_API_H_



using namespace std;

#include "json.hpp"
using namespace json;


// Below: What we did with flights and payments satisfy Dependency inversion principle
// High-level modules (expedia.com) should not depend on low-level modules (AirCandaAirlines/PaypalPayment APIs).
// Both should depend on abstractions (e.g. IFlighsFinder and IPayment).
// That is the power of interfaces BTW ;)

class PayPalCreditCard {
public:
	string name;
	string address;
	string id;
	string expiry_date;
	int ccv;
};

class PayPalOnlinePaymentAPI {
public:
	void SetCardInfo(const PayPalCreditCard* const card) {
	}
	bool MakePayment(double money) {
		return true;
	}
};

class StripeUserInfo {
public:
	string name;
	string address;
};

class StripeCardInfo {
public:
	string id;
	string expiry_date;
};

class StripePaymentAPI {
public:
	bool static WithDrawMoney(StripeUserInfo user, StripeCardInfo card, double money) {
		return true;
	}
};

class SquarePaymentAPI {
public:
	bool static WithDrawMoney(string JsonQuery) {
		//cout << JsonQuery << "\n";
		json::JSON obj = JSON::Load(JsonQuery);
		return true;
	}
};

class IPayment {
public:
    virtual void SetUserInfo(string name, string address) = 0;
    virtual void SetCardInfo(string id, string expiry_date, int ccv) = 0;
    virtual bool MakePayment(double money) = 0;
    virtual ~IPayment() {}
};

class PayPalPayment : public IPayment {
private:
    PayPalOnlinePaymentAPI paypal;
    PayPalCreditCard card;
public:
    virtual void SetUserInfo(string name, string address) {
        card.name = name;
        card.address = address;
    }

    virtual void SetCardInfo(string id, string expiry_date, int ccv){
        card.id = id;
        card.expiry_date = expiry_date;
        card.ccv = ccv;
    }

    virtual bool MakePayment(double money) {
        paypal.SetCardInfo(&card);
        return paypal.MakePayment(money);
    }
};

class StripePayment : public IPayment {
private:
    StripeCardInfo card;
    StripeUserInfo user;
public:
    // setters
    virtual void SetUserInfo(string name, string address) {
        user.name = name;
        user.address = address;
    }

    virtual void SetCardInfo(string id, string expiry_date, int ccv) {
        card.id = id;
        card.expiry_date = expiry_date;
    }

    virtual bool MakePayment(double money) {
        return StripePaymentAPI::WithDrawMoney(user, card, money);
    }
};

class SquarePayment : public IPayment {
private:
    string name;
    string address;
    string id;
    string expiry_date;
    int ccv;

    public:
    virtual void SetUserInfo(string name, string address) {
        this->name = name;
        this->address = address;
    }

    virtual void SetCardInfo(string id, string expiry_date, int ccv) {
        this->id = id;
        this->expiry_date = expiry_date;
        this->ccv = ccv;
    }

    virtual bool MakePayment(double money) {
        // this is similar to adapter pattern...
        // we change format of interface to match another interface
        json::JSON obj;
        obj["user_info"] = json::Array(name, address);
        obj["card_info"]["ID"] = id;
        obj["card_info"]["DATE"] = expiry_date;
        obj["card_info"]["CCV"] = ccv;
        obj["money"] = money;

        ostringstream oss;
        oss << obj;
        string json_query = oss.str();

        return SquarePaymentAPI::WithDrawMoney(json_query);
    }
};

class PaymentFactory {
public:
    static IPayment* GetPaymentHelper() {
        if (true)
            return new SquarePayment();
        else if (true)
            return new PayPalPayment();
        else
            return new StripePayment();
    }
};

#endif /* EXPEDIA_PAYMENTS_API_H_ */