4dkankan-ceneter-pay/src/main/java/com/fdkankan/pay/util/paypal/sdk/PaypalService.java

package com.fdkankan.pay.util.paypal.sdk;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.fdkankan.pay.common.ResultCode;
import com.fdkankan.pay.entity.AliConfig;
import com.fdkankan.pay.entity.Order;
import com.fdkankan.pay.entity.PaypalConfig;
import com.fdkankan.pay.exception.BusinessException;
import com.fdkankan.pay.response.OpenPayResponse;
import com.fdkankan.pay.service.IOrderService;
import com.fdkankan.pay.service.IPaypalConfigService;
import com.fdkankan.pay.util.CacheUtil;
import com.fdkankan.pay.util.UrlUtils;
import com.paypal.api.payments.*;
import com.paypal.base.codec.binary.Base64;
import com.paypal.base.rest.APIContext;
import com.paypal.base.rest.PayPalRESTException;
import lombok.extern.log4j.Log4j2;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.math.BigDecimal;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.*;

@Log4j2
@Service
public class PaypalService {

    @Autowired
    IPaypalConfigService paypalConfigService;
    @Autowired
    IOrderService orderService;

    public Object openPay(Order param, String ip) throws Exception {

        String orderSn = param.getOrderSn();
        BigDecimal amount = param.getOrderMoney();
        String subject = param.getOrderType();
        PaypalConfig paypalConfig = paypalConfigService.getByServeId(param.getServeId());
        if(paypalConfig == null){
            throw new BusinessException(ResultCode.PAYPAL_CONFIG_ERROR);
        }
        paypalConfig.setSuccessUrl( CacheUtil.mainUrl + paypalConfig.getCallBackUrl() +"/"+orderSn+"/"+param.getPayType()+"/success");
        paypalConfig.setCancelUrl( CacheUtil.mainUrl + paypalConfig.getCallBackUrl() +"/"+orderSn+"/"+param.getPayType()+"/cancel");
        String body = subject;
        //paypal支付
        if(param.getPayType() == 5){
            return this.payPalPay(orderSn, body, amount,paypalConfig);
        }
        throw new BusinessException(ResultCode.WX_ORDER_PAY_TYPE_ERROR);
    }



    public OpenPayResponse payPalPay(String orderSn, String body, BigDecimal totalFee, PaypalConfig paypalConfig) throws Exception {
        PayPalmentEx payPalmentEx = new PayPalmentEx();
        payPalmentEx.setOrderSn(orderSn);
        payPalmentEx.setOrderTotal(totalFee);
        payPalmentEx.setSubTotal(totalFee);
        payPalmentEx.setDescription(body);

        Payment payment = this.createPayment(payPalmentEx,paypalConfig);
        for(Links links : payment.getLinks()){
            if(links.getRel().equals("approval_url")){
                // 客户付款登陆地址
                OpenPayResponse openPayResponse = new OpenPayResponse();
                openPayResponse.setH5Url(links.getHref());
                openPayResponse.setQrCodeUrl(links.getHref());
                openPayResponse.setOrderSn(orderSn);
                openPayResponse.setPayType(5);
                return openPayResponse;
            }
        }
        throw new BusinessException(ResultCode.PAYPAL_ERROR);
    }

    public Boolean callBack(HttpServletRequest request, HttpServletResponse response, Order order,String result) {
        log.info("paypal-callBack--order:{}",order);
        Boolean payFlag = false;
        String trade_no = null;
        String openId = null;
        if("cancel".equals(result)){
            return false;
        }
        try {
             String paymentId = request.getParameter("paymentId");//商品名
             String payerId = request.getParameter("PayerID");//购买数量
            PaypalConfig paypalConfig = paypalConfigService.getByServeId(order.getServeId());
            if(paypalConfig == null){
                log.error("paypal-callBack--paypalConfig-notexist");
                return false;
            }

            log.info("paypal回调参数:paymentId:{},payerId:{}", paymentId,payerId);
            Payment payment = this.executePayment(paymentId, payerId,paypalConfig);
            if (payment.getState().equals("approved")) {
                log.info("paypal支付成功回调");
                String custom = payment.getTransactions().get(0).getCustom();
                String txnId = payment.getTransactions().get(0).getRelatedResources().get(0).getSale().getId();
                String payerEmail  = payment.getTransactions().get(0).getPayee().getEmail();
                log.info("paypal-callBack:custom:{},txnid:{},payerEmail:{}",custom,txnId,payerEmail);

                String orderSn = custom.split("_")[0];
                if(custom.split("_").length > 2 && custom.split("_")[2].matches("^-?[0-9]+")){
                    orderSn += "_" + custom.split("_")[2];
                }
                payFlag = true;
                trade_no = txnId;
                openId = payerEmail;
            }
        }catch (Exception e) {
            log.error("paypal支付回调异常,errorMsg:{}", e.getMessage());
            return false;
        }finally {
            orderService.payResult(order,payFlag,trade_no,openId);
        }
        return  true;
    }


//    public Boolean callBack(HttpServletRequest request, HttpServletResponse response, Order order) {
//        log.info("paypal-callBack--order:{}",order);
//        Boolean payFlag = false;
//        String trade_no = null;
//        String openId = null;
//        try {
//            Enumeration en = request.getParameterNames();
//            String str = "cmd=_notify-validate";
//            while (en.hasMoreElements()) {
//                String paramName = (String) en.nextElement();
//                String paramValue = request.getParameter(paramName);
//                try {
//                    str = str + "&" + paramName + "=" + URLEncoder.encode(paramValue, "utf-8");
//                } catch (UnsupportedEncodingException e) {
//                    StringWriter trace=new StringWriter();
//                    e.printStackTrace(new PrintWriter(trace));
//                    log.error(trace.toString());
//                }
//                //此处的编码一定要和自己的网站编码一致，不然会出现乱码，paypal回复的通知为‘INVALID’
//            }
//            final String itemName = request.getParameter("item_name");//商品名
//            final String itemNumber = request.getParameter("item_number");//购买数量
//            final String paymentDate = request.getParameter("payment_date");//交易时间
//            final String receiverEmail = request.getParameter("receiver_email");//收款人email
//            final String payerEmail = request.getParameter("payer_email");//付款人email
//            final String paymentAmount = request.getParameter("mc_gross");//交易钱数
//            final String paymentCurrency = request.getParameter("mc_currency");//货币种类
//            final String paymentStatus = request.getParameter("payment_status");//交易状态
//            final String txnId = request.getParameter("txn_id");//交易id
//            String custom = request.getParameter("custom");//发送payment请求时候自定义的业务服务器订单号
//            log.info("paypal回调参数:itemName:{},itemNumber:{},paymentDate:{},receiverEmail:{}," +
//                    "payerEmail:{},paymentAmount:{},paymentCurrency:{},paymentStatus:{},txnId:{},custom:{}",
//                    itemName,itemNumber,paymentDate,receiverEmail,payerEmail,paymentAmount,paymentCurrency,paymentStatus,txnId,custom);
//
//            trade_no = txnId;
//            openId = payerEmail;
//            if ("Completed".equals(paymentStatus)) {
//                //根据自己业务进行处理（修改订单状态，支付时间等等操作）
//                log.info("paypal支付成功回调");
//                //表示续费，有消费记录id
//                payFlag = true;
//            }
//        }catch (Exception e) {
//            log.error("paypal支付回调异常,errorMsg:{}", e.getMessage());
//            return false;
//        }finally {
//            orderService.payResult(order,payFlag,trade_no,openId);
//        }
//        return  true;
//    }



    /**
     * 创建支付
     *
     * @param paymentEx
     * @return
     * @throws PayPalRESTException
     */
    @Transactional(rollbackFor = Exception.class)
    public Payment createPayment(PayPalmentEx paymentEx, PaypalConfig paypalConfig) throws PayPalRESTException {
        Transaction transaction = new Transaction();
        transaction.setDescription(paymentEx.getDescription());
        // 将我们的订单ID保存到支付信息中，用于后面支付回传
        if (null != paymentEx.getOrderSn()) {
            transaction.setCustom(paymentEx.getOrderSn());
        }
        //订单价格
        Amount amount = new Amount();
        amount.setCurrency(paypalConfig.getCurrency());
        // 支付的总价，paypal会校验 total = subTotal + tax + ...
        amount.setTotal(paymentEx.getOrderTotal().toString());
        // 设置各种费用
        Details details = new Details();
        // 商品总价
        if (paymentEx.getSubTotal() != null) {
            details.setSubtotal(paymentEx.getSubTotal().toString());
        }
        // 税费
        if (paymentEx.getTax() != null) {
            details.setTax(paymentEx.getTax().toString());
        }

        amount.setDetails(details);

        transaction.setAmount(amount);

        ItemList itemList = new ItemList();
        // 收货地址
        PaypalOrderAddressEx orderAddress = paymentEx.getPaypayOrderAddressEx();
        if (orderAddress != null) {
            ShippingAddress shippingAddress = new ShippingAddress();
            if (StringUtils.isNotEmpty(orderAddress.getFirstName()) && StringUtils.isNotEmpty(orderAddress.getLastName())) {
                shippingAddress.setRecipientName(orderAddress.getFirstName() + "." + orderAddress.getLastName());
            }
            shippingAddress.setCountryCode(orderAddress.getCountryCode());
            shippingAddress.setState(orderAddress.getState());
            shippingAddress.setCity(orderAddress.getCity());
            shippingAddress.setLine1(orderAddress.getAddress());
            shippingAddress.setPhone(orderAddress.getPhone());
            shippingAddress.setPostalCode(orderAddress.getPostalCode());

            itemList.setShippingAddress(shippingAddress);
            itemList.setShippingPhoneNumber(orderAddress.getPhone());
        }

        // 商品明细
        List<PaypalOrderItemEx> orderItemList = paymentEx.getPaypalOrderItemExList();
        if (orderItemList != null && orderItemList.size() > 0) {
            List<Item> items = new ArrayList<>();
            for (PaypalOrderItemEx orderItemEx : orderItemList) {
                Item item = new Item();
                item.setSku(orderItemEx.getSku());
                item.setName(orderItemEx.getName());
                item.setPrice(orderItemEx.getPrice().toString());
                item.setQuantity(String.valueOf(orderItemEx.getQuantity()));
                item.setCurrency(paypalConfig.getCurrency());
                items.add(item);
            }
            itemList.setItems(items);
            transaction.setItemList(itemList);
        }

        List<Transaction> transactions = new ArrayList<>();
        transactions.add(transaction);

        // 支付信息
        Payer payer = new Payer();
        payer.setPaymentMethod(PaypalPaymentMethod.paypal.toString());

        Payment payment = new Payment();
        //刷新accessToken时间;
        APIContext apiContext = new APIContext("Bearer " + getAccessToken(paypalConfig));
        Map<String, String> sdkConfig = new HashMap<>();
        sdkConfig.put("mode", paypalConfig.getMode());
        apiContext.setConfigurationMap(sdkConfig);

        payment.setIntent(PaypalPaymentIntent.sale.toString());
        payment.setPayer(payer);
        payment.setTransactions(transactions);

        //回调地址
        RedirectUrls redirectUrls = new RedirectUrls();
        redirectUrls.setReturnUrl(paypalConfig.getSuccessUrl());
        redirectUrls.setCancelUrl(paypalConfig.getCancelUrl());
        payment.setRedirectUrls(redirectUrls);

        return payment.create(apiContext);
    }

    /**
     * 执行支付
     *
     * @param paymentId
     * @param payerId
     * @return
     * @throws PayPalRESTException
     */
    public Payment executePayment(String paymentId, String payerId,PaypalConfig paypalConfig) throws PayPalRESTException {
        Payment payment = new Payment();
        payment.setId(paymentId);
        PaymentExecution paymentExecute = new PaymentExecution();
        paymentExecute.setPayerId(payerId);

        APIContext apiContext = new APIContext("Bearer " + getAccessToken(paypalConfig));
        Map<String, String> sdkConfig = new HashMap<>();
        sdkConfig.put("mode", paypalConfig.getMode());
        apiContext.setConfigurationMap(sdkConfig);

        return payment.execute(apiContext, paymentExecute);
    }

    /**
      * 获取token
      * 了解更多：https://developer.paypal.com/webapps/developer/docs/integration/mobile/verify-mobile-payment/
      * @return
      */
    private String getAccessToken(PaypalConfig paypalConfig) {
        BufferedReader reader = null;
        try {
            URL url = new URL(UrlUtils.TOKEN_URL);
            String authorization = paypalConfig.getClientId() + ":" + paypalConfig.getSecret();
            authorization = Base64.encodeBase64String(authorization.getBytes());

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");// 提交模式
            //设置请求头header
            conn.setRequestProperty("Accept", "application/json");
            conn.setRequestProperty("Accept-Language", "en_US");
            conn.setRequestProperty("Authorization", "Basic " + authorization);
            // conn.setConnectTimeout(10000);//连接超时 单位毫秒
            // conn.setReadTimeout(2000);//读取超时 单位毫秒
            conn.setDoOutput(true);// 是否输入参数
            String params = "grant_type=client_credentials";
            conn.getOutputStream().write(params.getBytes());// 输入参数

            InputStreamReader inStream = new InputStreamReader(conn.getInputStream());
            reader = new BufferedReader(inStream);
            StringBuilder result = new StringBuilder();
            String lineTxt = null;
            while ((lineTxt = reader.readLine()) != null) {
                result.append(lineTxt);
            }
            reader.close();
            //log.info("getAccessToken:" + accessTokey);
            return JSONObject.parseObject(result.toString()).getString("access_token");
        } catch (Exception err) {
            err.printStackTrace();
        } finally {
            if (reader != null){
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

    public String getPaymentDetails(String paymentId,PaypalConfig paypalConfig) {
        BufferedReader reader = null;
        try {
            URL url = new URL(UrlUtils.PAYMENT_DETAIL + paymentId);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");// 提交模式
            //设置请求头header
            conn.setRequestProperty("Accept", "application/json");
            conn.setRequestProperty("Authorization", "Bearer " + getAccessToken(paypalConfig));
            // conn.setConnectTimeout(10000);//连接超时 单位毫秒
            // conn.setReadTimeout(2000);//读取超时 单位毫秒
            InputStreamReader inStream = new InputStreamReader(conn.getInputStream());
            reader = new BufferedReader(inStream);
            StringBuilder result = new StringBuilder();
            String lineTxt = null;
            while ((lineTxt = reader.readLine()) != null) {
                result.append(lineTxt);
            }
            reader.close();
            return result.toString();
        } catch (Exception err) {
            err.printStackTrace();
        }finally {
            if (reader != null){
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

    public boolean verifyPayment(String paymentId,PaypalConfig paypalConfig){
        //从PayPal获取付款详情
        String str = getPaymentDetails(paymentId,paypalConfig);
        JSONObject detail = JSONObject.parseObject(str);
        //校验订单是否完成
        if("approved".equals(detail.getString("state"))){
            JSONObject transactions = detail.getJSONArray("transactions").getJSONObject(0);
            JSONObject amount = transactions.getJSONObject("amount");
            JSONArray relatedResources = transactions.getJSONArray("related_resources");
            //从数据库查询总金额与Paypal校验支付总金额
            double total = 0;
            if( total != amount.getDouble("total") ){
                return false;
            }
            //校验交易货币类型
            String currency = "USD";
            if( !currency.equals(amount.getString("currency")) ){
                return false;
            }
            //校验每个子订单是否完成
            for (int i = 0,j = relatedResources.size(); i < j; i++) {
                JSONObject sale = relatedResources.getJSONObject(i).getJSONObject("sale");
                if( !"completed".equals(sale.getString("state")) ){
                    System.out.println("子订单未完成,订单状态:"+sale.getString("state"));
                }
            }
            return true;
        }
        return false;
    }


}