Added Variant and updated client

Author: Henrique Cabral

src/main/java/org/zendesk/client/v2/Zendesk.java

@@ -53,6 +53,8 @@
 import org.zendesk.client.v2.model.User;
 import org.zendesk.client.v2.model.UserField;
 import org.zendesk.client.v2.model.UserRelatedInfo;
+import org.zendesk.client.v2.model.dynamic.Item;
+import org.zendesk.client.v2.model.dynamic.Variant;
 import org.zendesk.client.v2.model.hc.Article;
 import org.zendesk.client.v2.model.hc.ArticleAttachments;
 import org.zendesk.client.v2.model.hc.Category;
@@ -1609,6 +1611,68 @@ public SatisfactionRating createSatisfactionRating(Ticket ticket, SatisfactionRa
         return createSatisfactionRating(ticket.getId(), satisfactionRating);
     }
 
+    //////////////////////////////////////////////////////////////////////
+    // Action methods for Dynamic Content - Items and Variants
+    //////////////////////////////////////////////////////////////////////
+
+    public Iterable<Item> getItems() {
+        return new PagedIterable<>(cnst("/dynamic_content/items.json"), handleList(Item.class, "items"));
+    }
+
+    public Item getItem(long id) {
+        return complete(submit(req("GET", tmpl("/dynamic_content/items/{id}.json").set("id", id)), handle(Item.class, "item")));
+    }
+
+    public Item createItem(Item item) {
+        return complete(submit(req("POST", cnst("/dynamic_content/items.json"), JSON, json(
+            Collections.singletonMap("item", item))), handle(Item.class, "item")));
+    }
+
+    public Item updateItem(Item item) {
+        checkHasId(item);
+        return complete(submit(req("PUT", tmpl("/dynamic_content/items/{id}.json").set("id", item.getId()),
+                JSON, json(Collections.singletonMap("item", item))), handle(Item.class, "item")));
+    }
+
+    public void deleteItem(Item item) {
+        checkHasId(item);
+        complete(submit(req("DELETE", tmpl("/dynamic_content/items/{id}.json").set("id", item.getId())),
+                handleStatus()));
+    }
+
+    /** VARIANTS */
+
+    public Iterable<Variant> getVariants(Item item) {
+        checkHasId(item);
+        return new PagedIterable<>(
+                tmpl("/dynamic_content/items/{id}/variants.json").set("id", item.getId()),
+                handleList(Variant.class, "variants"));
+    }
+
+    public Variant getVariant(Long itemId, long id) {
+        return complete(submit(req("GET", tmpl("/dynamic_content/items/{itemId}/variants/{id}.json").set("itemId", itemId).set("id", id)),
+                handle(Variant.class, "variant")));
+    }
+
+    public Variant createVariant(Long itemId, Variant variant) {
+        checkHasItemId(itemId);
+        return complete(submit(req("POST", tmpl("/dynamic_content/items/{id}/variants.json").set("id", itemId),
+                JSON, json(Collections.singletonMap("variant", variant))), handle(Variant.class, "variant")));
+    }
+
+    public Variant updateVariant(Long itemId, Variant variant) {
+        checkHasItemId(itemId);
+        checkHasId(variant);
+        return complete(submit(req("PUT", tmpl("/dynamic_content/items/{itemId}/variants/{id}.json").set("itemId", itemId).set("id", variant.getId()),
+                JSON, json(Collections.singletonMap("variant", variant))), handle(Variant.class, "variant")));
+    }
+
+    public void deleteVariant(Long itemId, Variant variant) {
+        checkHasItemId(itemId);
+        checkHasId(variant);
+        complete(submit(req("DELETE", tmpl("/dynamic_content/items/{itemId}/variants/{id}.json").set("itemId", itemId).set("id", variant.getId())), handleStatus()));
+    }
+
     // TODO search with sort order
     // TODO search with query building API
 
@@ -2353,6 +2417,24 @@ private static void checkHasId(Article article) {
         }
     }
 
+    private static void checkHasId(Item item) {
+        if (item.getId() == null) {
+            throw new IllegalArgumentException("Item requires id");
+        }
+    }
+
+    private static void checkHasId(Variant variant) {
+        if (variant.getId() == null) {
+            throw new IllegalArgumentException("Variant requires id");
+        }
+    }
+
+    private static void checkHasItemId(Long itemId) {
+        if (itemId == null) {
+            throw new IllegalArgumentException("Variant requires item id");
+        }
+    }
+
     private static void checkHasSectionId(Article article) {
         if (article.getSectionId() == null) {
             throw new IllegalArgumentException("Article requires section id");

src/main/java/org/zendesk/client/v2/model/dynamic/Variant.java

@@ -4,6 +4,7 @@
 
 import java.io.Serializable;
 import java.util.Date;
+import java.util.Objects;
 
 public class Variant implements Serializable {