move discount resolve API to ProductService

Author: v-rudkovskiy

NetLicensingClient/src/main/java/com/labs64/netlicensing/service/DiscountService.java

@@ -12,16 +12,20 @@
  */
 package com.labs64.netlicensing.service;
 
+import java.math.BigDecimal;
 import java.util.HashMap;
 import java.util.Map;
 
 import org.apache.commons.lang3.StringUtils;
 
 import com.labs64.netlicensing.domain.Constants;
+import com.labs64.netlicensing.domain.entity.LicenseTemplate;
 import com.labs64.netlicensing.domain.entity.Product;
 import com.labs64.netlicensing.domain.vo.Context;
 import com.labs64.netlicensing.domain.vo.Page;
 import com.labs64.netlicensing.exception.NetLicensingException;
+import com.labs64.netlicensing.exception.ServiceException;
+import com.labs64.netlicensing.provider.Form;
 import com.labs64.netlicensing.util.CheckUtils;
 import com.labs64.netlicensing.util.ConvertUtils;
 
@@ -38,6 +42,9 @@
  */
 public class ProductService {
 
+    private static final int HTTP_STATUS_NOT_FOUND = 404;
+    private static final String NOT_FOUND_EXCEPTION_PREFIX = "NotFoundException:";
+
     /**
      * Creates new product with given properties.
      * 
@@ -140,4 +147,69 @@ public static void delete(final Context context, final String number, final bool
         NetLicensingService.getInstance().delete(context, Constants.Product.ENDPOINT_PATH + "/" + number, params);
     }
 
+    /**
+     * Resolves a discount license template by product number and promo code.
+     *
+     * @param context
+     *            determines the vendor on whose behalf the call is performed
+     * @param productNumber
+     *            product number that defines promo code uniqueness scope
+     * @param promoCode
+     *            promo code to resolve
+     * @return resolved discount license template or null if discount was not found
+     * @throws NetLicensingException
+     *             any non-not-found service error
+     */
+    public static LicenseTemplate resolveDiscount(final Context context, final String productNumber,
+            final String promoCode) throws NetLicensingException {
+        return resolveDiscount(context, productNumber, promoCode, null);
+    }
+
+    /**
+     * Resolves a discount license template by product number and promo code.
+     *
+     * @param context
+     *            determines the vendor on whose behalf the call is performed
+     * @param productNumber
+     *            product number that defines promo code uniqueness scope
+     * @param promoCode
+     *            promo code to resolve
+     * @param cartTotal
+     *            optional cart total used by the API to validate minimum cart total
+     * @return resolved discount license template or null if discount was not found
+     * @throws NetLicensingException
+     *             any non-not-found service error
+     */
+    public static LicenseTemplate resolveDiscount(final Context context, final String productNumber,
+            final String promoCode, final BigDecimal cartTotal) throws NetLicensingException {
+        CheckUtils.paramNotEmpty(productNumber, "productNumber");
+        CheckUtils.paramNotEmpty(promoCode, "promoCode");
+
+        final Form form = new Form();
+        if (cartTotal != null) {
+            form.param(Constants.Product.Discount.CART_TOTAL, cartTotal.toString());
+        }
+
+        try {
+            return NetLicensingService.getInstance().post(context, resolveDiscountEndpoint(productNumber, promoCode),
+                    form, LicenseTemplate.class);
+        } catch (final ServiceException e) {
+            if (isNotFound(e)) {
+                return null;
+            }
+            throw e;
+        }
+    }
+
+    private static String resolveDiscountEndpoint(final String productNumber, final String promoCode) {
+        return Constants.Product.ENDPOINT_PATH + "/" + productNumber + "/"
+                + Constants.Product.Discount.ENDPOINT_PATH + "/" + promoCode + "/"
+                + Constants.Product.Discount.ENDPOINT_RESOLVE_PATH;
+    }
+
+    private static boolean isNotFound(final ServiceException e) {
+        return (e.getStatusCode() == HTTP_STATUS_NOT_FOUND)
+                || StringUtils.startsWith(e.getMessage(), NOT_FOUND_EXCEPTION_PREFIX);
+    }
+
 }