content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.apache.oozie.ambari.view.assets;
  
  import com.google.gson.Gson;
  import com.google.gson.JsonElement;
  import com.google.gson.JsonParser;
  import org.apache.ambari.view.ViewContext;
  import org.apache.oozie.ambari.view.*;
  import org.apache.oozie.ambari.view.assets.model.ActionAsset;
  import org.apache.oozie.ambari.view.assets.model.ActionAssetDefinition;
  import org.apache.oozie.ambari.view.assets.model.AssetDefintion;
  import org.apache.oozie.ambari.view.exception.ErrorCode;
  import org.apache.oozie.ambari.view.exception.WfmException;
  import org.apache.oozie.ambari.view.exception.WfmWebException;
  import org.apache.oozie.ambari.view.model.APIResult;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.ws.rs.*;
  import javax.ws.rs.core.*;
  import java.io.IOException;
  import java.util.*;
  
  import static org.apache.oozie.ambari.view.Constants.*;
  
  public class AssetResource {
  
    private final static Logger LOGGER = LoggerFactory
      .getLogger(AssetResource.class);
    private final AssetService assetService;
    private final ViewContext viewContext;
    private final HDFSFileUtils hdfsFileUtils;
    private final OozieUtils oozieUtils = new OozieUtils();
    private final OozieDelegate oozieDelegate;
  
  
    public AssetResource(ViewContext viewContext) {
      this.viewContext = viewContext;
      this.assetService = new AssetService(viewContext);
      hdfsFileUtils = new HDFSFileUtils(viewContext);
      oozieDelegate = new OozieDelegate(viewContext);
    }
  
    @GET
    public Response getAssets() {
      try {
        Collection<ActionAsset> assets = assetService.getAssets();
        APIResult result = new APIResult();
        result.setStatus(APIResult.Status.SUCCESS);
        result.getPaging().setTotal(assets != null ? assets.size() : 0L);
        result.setData(assets);
        return Response.ok(result).build();
      } catch (Exception ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex);
      }
    }
  
    @GET
    @Path("/mine")
    public Response getMyAssets() {
      try {
        Collection<ActionAsset> assets = assetService.getMyAssets();
        APIResult result = new APIResult();
        result.setStatus(APIResult.Status.SUCCESS);
        result.getPaging().setTotal(assets != null ? assets.size() : 0L);
        result.setData(assets);
        return Response.ok(result).build();
      } catch (Exception ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex);
      }
    }
    @POST
    public Response saveAsset(@Context HttpHeaders headers,
                              @QueryParam("id") String id, @Context UriInfo ui, String body) {
      try {
        Gson gson = new Gson();
        AssetDefintion assetDefinition = gson.fromJson(body, AssetDefintion.class);
        Map<String, String> validateAsset = validateAsset(headers,
          assetDefinition.getDefinition(), ui.getQueryParameters());
        if (!STATUS_OK.equals(validateAsset.get(STATUS_KEY))) {
          throw new WfmWebException(ErrorCode.ASSET_INVALID_FROM_OOZIE);
        }
        assetService.saveAsset(id, viewContext.getUsername(), assetDefinition);
        APIResult result = new APIResult();
        result.setStatus(APIResult.Status.SUCCESS);
        return Response.ok(result).build();
      } catch (WfmWebException ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw ex;
      } catch (Exception ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex);
      }
    }
  
    private List<String> getAsList(String string) {
      ArrayList<String> li = new ArrayList<>(1);
      li.add(string);
      return li;
    }
  
    public Map<String, String> validateAsset(HttpHeaders headers,
                                             String postBody, MultivaluedMap<String, String> queryParams) {
      String workflowXml = oozieUtils.generateWorkflowXml(postBody);
      Map<String, String> result = new HashMap<>();
      String tempWfPath = "/tmp" + "/tmpooziewfs/tempwf_" + Math.round(Math.random() * 100000) + ".xml";
      try {
        hdfsFileUtils.writeToFile(tempWfPath, workflowXml, true);
      } catch (IOException ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex, ErrorCode.FILE_ACCESS_UNKNOWN_ERROR);
      }
      queryParams.put("oozieparam.action", getAsList("dryrun"));
      queryParams.put("oozieconfig.rerunOnFailure", getAsList("false"));
      queryParams.put("oozieconfig.useSystemLibPath", getAsList("true"));
      queryParams.put("resourceManager", getAsList("useDefault"));
      String dryRunResp = oozieDelegate.submitWorkflowJobToOozie(headers,
        tempWfPath, queryParams, JobType.WORKFLOW);
      LOGGER.info(String.format("resp from validating asset=[%s]", dryRunResp));
      try {
        hdfsFileUtils.deleteFile(tempWfPath);
      } catch (IOException ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex, ErrorCode.FILE_ACCESS_UNKNOWN_ERROR);
      }
      if (dryRunResp != null && dryRunResp.trim().startsWith("{")) {
        JsonElement jsonElement = new JsonParser().parse(dryRunResp);
        JsonElement idElem = jsonElement.getAsJsonObject().get("id");
        if (idElem != null) {
          result.put(STATUS_KEY, STATUS_OK);
        } else {
          result.put(STATUS_KEY, STATUS_FAILED);
          result.put(MESSAGE_KEY, dryRunResp);
        }
      } else {
        result.put(STATUS_KEY, STATUS_FAILED);
        result.put(MESSAGE_KEY, dryRunResp);
      }
      return result;
    }
  
    @GET
    @Path("/assetNameAvailable")
    public Response assetNameAvailable(@QueryParam("name") String name){
      try {
        boolean available = assetService.isAssetNameAvailable(name);
        return Response.ok(available).build();
      }catch (Exception ex){
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex);
      }
    }
  
    @GET
    @Path("/{id}")
    public Response getAssetDetail(@PathParam("id") String id) {
      try {
        AssetDefintion assetDefinition = assetService.getAssetDetail(id);
        APIResult result = new APIResult();
        result.setStatus(APIResult.Status.SUCCESS);
        result.setData(assetDefinition);
        return Response.ok(result).build();
      } catch (Exception ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex);
      }
    }
  
    @GET
    @Path("/definition/id}")
    public Response getAssetDefinition(@PathParam("defnitionId") String id) {
      try {
        ActionAssetDefinition assetDefinition = assetService.getAssetDefinition(id);
        APIResult result = new APIResult();
        result.setStatus(APIResult.Status.SUCCESS);
        result.setData(assetDefinition);
        return Response.ok(result).build();
      } catch (Exception ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex);
      }
    }
  
    @DELETE
    @Path("/{id}")
    public Response delete(@PathParam("id") String id) {
      try {
        ActionAsset asset = assetService.getAsset(id);
        if (asset == null) {
          throw new WfmWebException(ErrorCode.ASSET_NOT_EXIST);
        }
        if (!viewContext.getUsername().equals(asset.getOwner())){
          throw new WfmWebException(ErrorCode.PERMISSION_ERROR);
        }
        assetService.deleteAsset(id);
        APIResult result = new APIResult();
        result.setStatus(APIResult.Status.SUCCESS);
        return Response.ok(result).build();
      } catch (WfmWebException ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw ex;
      } catch (Exception ex) {
        LOGGER.error(ex.getMessage(),ex);
        throw new WfmWebException(ex);
      }
    }
  }
  