Add UpdateMessageWrapper class to catch update message events.

Author: Sam1301

app/src/main/java/com/zulip/android/networking/AsyncGetEvents.java

@@ -348,6 +348,9 @@ public Message convert(MessageWrapper messageWrapper) {
                     + " realm event");
             processMessageEditParam(messageTimeLimit);
         }
+
+        // update message
+        // TODO: handle update message event
     }
 
     /**

app/src/main/java/com/zulip/android/networking/response/events/EventsBranch.java

@@ -26,7 +26,8 @@ public enum BranchType {
         PRESENCE(PresenceWrapper.class, "presence"),
         SUBSCRIPTIONS(SubscriptionWrapper.class, "subscription"),
         MUTED_TOPICS(MutedTopicsWrapper.class, "muted_topics"),
-        EDIT_MESSAGE_TIME_LIMIT(EditMessageWrapper.class, "realm");
+        EDIT_MESSAGE_TIME_LIMIT(EditMessageWrapper.class, "realm"),
+        UPDATE_MESSAGE(UpdateMessageWrapper.class, "update_message");
 
 
         private final Class<? extends EventsBranch> klazz;

app/src/main/java/com/zulip/android/networking/response/events/UpdateMessageWrapper.java

@@ -0,0 +1,80 @@
+package com.zulip.android.networking.response.events;
+
+import com.google.gson.annotations.SerializedName;
+import com.j256.ormlite.dao.Dao;
+import com.zulip.android.ZulipApp;
+import com.zulip.android.models.Message;
+import com.zulip.android.util.ZLog;
+
+import java.sql.Date;
+import java.sql.SQLException;
+import java.util.List;
+
+/**
+ * TODO: Add description
+ * example: {"rendered_content":"<p>(deleted</p>","sender":"[email protected]",
+ *      "edit_timestamp":1485954038,"orig_content":"(deleted)","message_ids":[142650],
+ *      "content":"(deleted","orig_rendered_content":"<p>(deleted)</p>","flags":["read"],"id":31,
+ *      "type":"update_message","message_id":142650}
+ */
+
+public class UpdateMessageWrapper extends EventsBranch {
+    @SerializedName("rendered_content")
+    private String formattedContent;
+
+    @SerializedName("sender")
+    private String senderEmail;
+
+    @SerializedName("edit_timestamp")
+    private Date editedTimeStamp;
+
+    @SerializedName("orig_content")
+    private String origContent;
+
+    @SerializedName("message_ids")
+    private List<Integer> messageIds;
+
+    @SerializedName("content")
+    private String content;
+
+    @SerializedName("orig_rendered_content")
+    private String origFormattedContent;
+
+    @SerializedName("flags")
+    private List<?> flags;
+
+    @SerializedName("message_id")
+    private int messageId;
+
+    /**
+     * Returns old form of edited message.
+     *
+     * @return {@link Message} message
+     */
+    public Message getMessage() {
+        try {
+            Dao<Message, Integer> messageDao = ZulipApp.get().getDao(Message.class);
+            return messageDao.queryBuilder().where().eq(Message.ID_FIELD, this.messageId).queryForFirst();
+        } catch (SQLException e) {
+            ZLog.logException(e);
+        }
+
+        return null;
+    }
+
+    public String getContent() {
+        return this.content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public String getFormattedContent() {
+        return this.formattedContent;
+    }
+
+    public void setFormattedContent(String formattedContent) {
+        this.formattedContent = formattedContent;
+    }
+}