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
   *
   *     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.apache.ambari.server.api.services;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.HashMap;
  import java.util.Map;
  
  import jakarta.ws.rs.DELETE;
  import jakarta.ws.rs.GET;
  import jakarta.ws.rs.POST;
  import jakarta.ws.rs.PUT;
  import jakarta.ws.rs.Path;
  import jakarta.ws.rs.PathParam;
  import jakarta.ws.rs.Produces;
  import jakarta.ws.rs.QueryParam;
  import jakarta.ws.rs.core.Context;
  import jakarta.ws.rs.core.HttpHeaders;
  import jakarta.ws.rs.core.Response;
  import jakarta.ws.rs.core.UriInfo;
  
  import org.apache.ambari.annotations.ApiIgnore;
  import org.apache.ambari.server.api.resources.ResourceInstance;
  import org.apache.ambari.server.configuration.Configuration;
  import org.apache.ambari.server.controller.spi.Resource;
  import org.apache.commons.lang.StringUtils;
  import org.apache.commons.lang.Validate;
  
  /**
   * Service responsible for components resource requests.
   */
  public class ComponentService extends BaseService {
    /**
     * Parent cluster id.
     */
    private String m_clusterName;
  
    /**
     * Parent service id.
     */
    private String m_serviceName;
  
    /**
     * Constructor.
     *
     * @param clusterName cluster id
     * @param serviceName service id
     */
    public ComponentService(String clusterName, String serviceName) {
      m_clusterName = clusterName;
      m_serviceName = serviceName;
    }
  
    /**
     * Handles GET: /clusters/{clusterID}/services/{serviceID}/components/{componentID}
     * Get a specific component.
     *
     * @param headers       http headers
     * @param ui            uri info
     * @param componentName component id
     * @return a component resource representation
     */
    @GET @ApiIgnore // until documented
    @Path("{componentName}")
    @Produces("text/plain")
    public Response getComponent(String body, @Context HttpHeaders headers, @Context UriInfo ui,
                                 @PathParam("componentName") String componentName, @QueryParam("format") String format) {
      if (format != null && format.equals("client_config_tar")) {
        return createClientConfigResource(body, headers, ui, componentName);
      }
  
      return handleRequest(headers, body, ui, Request.Type.GET,
          createComponentResource(m_clusterName, m_serviceName, componentName));
    }
  
    /**
     * Handles GET: /clusters/{clusterID}/services/{serviceID}/components
     * Get all components for a service.
     *
     * @param headers http headers
     * @param ui      uri info
     * @return component collection resource representation
     */
    @GET @ApiIgnore // until documented
    @Produces("text/plain")
    public Response getComponents(String body, @Context HttpHeaders headers, @Context UriInfo ui,
                                   @QueryParam("format") String format) {
  
      if (format != null && format.equals("client_config_tar")) {
        return createClientConfigResource(body, headers, ui, null);
      }
      return handleRequest(headers, body, ui, Request.Type.GET,
          createComponentResource(m_clusterName, m_serviceName, null));
    }
  
    /**
     * Handles: POST /clusters/{clusterID}/services/{serviceID}/components
     * Create components by specifying an array of components in the http body.
     * This is used to create multiple components in a single request.
     *
     * @param body          http body
     * @param headers       http headers
     * @param ui            uri info
     *
     * @return status code only, 201 if successful
     */
    @POST @ApiIgnore // until documented
    @Produces("text/plain")
    public Response createComponents(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
  
      return handleRequest(headers, body, ui, Request.Type.POST,
          createComponentResource(m_clusterName, m_serviceName, null));
    }
  
    /**
     * Handles: POST /clusters/{clusterID}/services/{serviceID}/components/{componentID}
     * Create a specific component.
     *
     * @param body          http body
     * @param headers       http headers
     * @param ui            uri info
     * @param componentName component id
     *
     * @return information regarding the created component
     */
    @POST @ApiIgnore // until documented
    @Path("{componentName}")
    @Produces("text/plain")
    public Response createComponent(String body, @Context HttpHeaders headers, @Context UriInfo ui,
                                  @PathParam("componentName") String componentName) {
  
      return handleRequest(headers, body, ui, Request.Type.POST,
          createComponentResource(m_clusterName, m_serviceName, componentName));
    }
  
    /**
     * Handles: PUT /clusters/{clusterID}/services/{serviceID}/components/{componentID}
     * Update a specific component.
     *
     * @param body          http body
     * @param headers       http headers
     * @param ui            uri info
     * @param componentName component id
     *
     * @return information regarding the updated component
     */
    @PUT @ApiIgnore // until documented
    @Path("{componentName}")
    @Produces("text/plain")
    public Response updateComponent(String body, @Context HttpHeaders headers, @Context UriInfo ui,
                                  @PathParam("componentName") String componentName) {
  
      return handleRequest(headers, body, ui, Request.Type.PUT, createComponentResource(
          m_clusterName, m_serviceName, componentName));
    }
  
    /**
     * Handles: PUT /clusters/{clusterID}/services/{serviceID}/components
     * Update multiple components.
     *
     * @param body          http body
     * @param headers       http headers
     * @param ui            uri info
     *
     * @return information regarding the updated component
     */
    @PUT @ApiIgnore // until documented
    @Produces("text/plain")
    public Response updateComponents(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
  
      return handleRequest(headers, body, ui, Request.Type.PUT, createComponentResource(
          m_clusterName, m_serviceName, null));
    }
  
    /**
     * Handles: DELETE /clusters/{clusterID}/services/{serviceID}/components/{componentID}
     * Delete a specific component.
     *
     * @param headers     http headers
     * @param ui          uri info
     * @param componentName cluster id
     * @return information regarding the deleted cluster
     */
    @DELETE @ApiIgnore // until documented
    @Path("{componentName}")
    @Produces("text/plain")
    public Response deleteComponent(@Context HttpHeaders headers, @Context UriInfo ui,
                                  @PathParam("componentName") String componentName) {
  
      return handleRequest(headers, null, ui, Request.Type.DELETE, createComponentResource(
          m_clusterName, m_serviceName, componentName));
    }
  
    /**
     * Create a component resource instance.
     *
     *
     * @param clusterName   cluster name
     * @param serviceName   service name
     * @param componentName component name
     *
     * @return a component resource instance
     */
    ResourceInstance createComponentResource(String clusterName, String serviceName, String componentName) {
      Map<Resource.Type,String> mapIds = new HashMap<>();
      mapIds.put(Resource.Type.Cluster, clusterName);
      mapIds.put(Resource.Type.Service, serviceName);
      mapIds.put(Resource.Type.Component, componentName);
  
      return createResource(Resource.Type.Component, mapIds);
    }
  
    private Response createClientConfigResource(String body, HttpHeaders headers, UriInfo ui,
                                        String componentName) {
      Map<Resource.Type,String> mapIds = new HashMap<>();
      mapIds.put(Resource.Type.Cluster, m_clusterName);
      mapIds.put(Resource.Type.Service, m_serviceName);
      mapIds.put(Resource.Type.Component, componentName);
      String filePrefixName;
  
      if (StringUtils.isEmpty(componentName)) {
        if (StringUtils.isEmpty(m_serviceName)) {
          filePrefixName = m_clusterName + "(" + Resource.InternalType.Cluster.toString().toUpperCase()+")";
        } else {
          filePrefixName = m_serviceName + "(" + Resource.InternalType.Service.toString().toUpperCase()+")";
        }
      } else {
        filePrefixName = componentName;
      }
  
      Validate.notNull(filePrefixName, "compressed config file name should not be null");
      String fileName =  filePrefixName + "-configs" + Configuration.DEF_ARCHIVE_EXTENSION;
  
      Response response = handleRequest(headers, body, ui, Request.Type.GET,
              createResource(Resource.Type.ClientConfig, mapIds));
  
      //If response has errors return response
      if (response.getStatus() != 200) {
        return response;
      }
  
      Response.ResponseBuilder rb = Response.status(Response.Status.OK);
      Configuration configs = new Configuration();
      String tmpDir = configs.getProperty(Configuration.SERVER_TMP_DIR.getKey());
      File file = new File(tmpDir,fileName);
      InputStream resultInputStream = null;
      try {
        resultInputStream = new FileInputStream(file);
      } catch (IOException e) {
        e.printStackTrace();
      }
  
      String contentType = Configuration.DEF_ARCHIVE_CONTENT_TYPE;
      rb.header("Content-Disposition",  "attachment; filename=\"" + fileName + "\"");
      rb.entity(resultInputStream);
      return rb.type(contentType).build();
  
    }
  
  }
  