content: /**
   * JBoss, Home of Professional Open Source
   * Copyright Red Hat, Inc., and individual contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.jboss.aerogear.unifiedpush.rest.util.transform;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.github.fge.jackson.JacksonUtils;
  import com.github.fge.jsonpatch.JsonPatch;
  import com.github.fge.jsonpatch.JsonPatchException;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  
  import static java.text.MessageFormat.format;
  
  /**
   * UserParams is a DynamicTransformer that moves all user parameters to a separate user-data section.
   */
  public class UserParams implements DynamicTransformer {
      private static final List<String> KNOWN_KEYS = Arrays.asList("alert", "apns", "sound", "badge",
              "simple-push", "user-data");
      public static final String MOVE_OP = "['{'\"op\": \"move\",\"from\": \"/message/{0}\",\"path\": \"/message/user-data/{0}\"'}']";
  
      @Override
      public JsonNode transform(JsonNode patched) throws IOException {
          Iterator<Map.Entry<String, JsonNode>> nodeIterator = patched.get("message").fields();
          while (nodeIterator.hasNext()) {
              Map.Entry<String, JsonNode> entry = nodeIterator.next();
  
              if (!KNOWN_KEYS.contains(entry.getKey())) {
                  String json = format(MOVE_OP, entry.getKey());
                  try {
                      patched = JsonPatch.fromJson(JacksonUtils.getReader().readTree(json)).apply(patched);
                  } catch (JsonPatchException e) {
                      throw new RuntimeException("move operation could not be applied", e);
                  }
              }
          }
  
          return patched;
      }
  }
  