text: /*
  
  Copyright 2010, Google Inc.
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
  met:
  
      * Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
      * Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the following disclaimer
  in the documentation and/or other materials provided with the
  distribution.
      * Neither the name of Google Inc. nor the names of its
  contributors may be used to endorse or promote products derived from
  this software without specific prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY           
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  */
  
  package com.google.refine.commands.project;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.google.refine.commands.Command;
  import com.google.refine.commands.HttpHeadersSupport;
  import com.google.refine.commands.HttpHeadersSupport.HttpHeaderInfo;
  import com.google.refine.expr.MetaParser;
  import com.google.refine.expr.MetaParser.LanguageInfo;
  import com.google.refine.importing.ImportingJob;
  import com.google.refine.importing.ImportingManager;
  import com.google.refine.model.ColumnModel;
  import com.google.refine.model.OverlayModel;
  import com.google.refine.model.Project;
  import com.google.refine.model.RecordModel;
  
  public class GetModelsCommand extends Command {
  	
  	/**
  	 * This command uses POST but is left CSRF-unprotected as it does not incur a state change.
  	 */
  	
      @Override
      public void doPost(HttpServletRequest request, HttpServletResponse response)
              throws ServletException, IOException {
          internalRespond(request, response);
      }
      
      @Override
      public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          internalRespond(request, response);
      }
      
      protected static class ModelsResponse {
          @JsonProperty("columnModel")
          protected ColumnModel columnModel;
          @JsonProperty("recordModel")
          protected RecordModel recordModel;
          @JsonProperty("overlayModels")
          protected Map<String, OverlayModel> overlayModels;
          @JsonProperty("scripting")
          protected Map<String, LanguageInfo> scripting;
          @JsonProperty("httpHeaders")
          protected Map<String, HttpHeaderInfo> httpHeaders;
          
          protected ModelsResponse(
                  ColumnModel columns,
                  RecordModel records,
                  Map<String, OverlayModel> overlays,
                  Map<String, LanguageInfo> languageInfos,
                  Map<String, HttpHeaderInfo> headers) {
              columnModel = columns;
              recordModel = records;
              overlayModels = overlays;
              scripting = languageInfos;
              httpHeaders = headers;
          }
      }
      
      protected void internalRespond(HttpServletRequest request, HttpServletResponse response)
          throws ServletException, IOException {
          
          Project project = null;
          
          // This command also supports retrieving rows for an importing job.
          String importingJobID = request.getParameter("importingJobID");
          if (importingJobID != null) {
              long jobID = Long.parseLong(importingJobID);
              ImportingJob job = ImportingManager.getJob(jobID);
              if (job != null) {
                  project = job.project;
              }
          }
          if (project == null) {
              project = getProject(request);
          }
          
          response.setHeader("Cache-Control", "no-cache");
  
          Map<String, LanguageInfo> prefixesMap = new HashMap<>();
          for (String languagePrefix : MetaParser.getLanguagePrefixes()) {
              LanguageInfo info = MetaParser.getLanguageInfo(languagePrefix);
              prefixesMap.put(languagePrefix, info);
          }
          
          Map<String, HttpHeaderInfo> headersMap = new HashMap<>();
          for (String headerLabel : HttpHeadersSupport.getHttpHeaderLabels()) {
              HttpHeaderInfo info = HttpHeadersSupport.getHttpHeaderInfo(headerLabel);
              headersMap.put(headerLabel, info);
          }
  
          respondJSON(response, new ModelsResponse(
                  project.columnModel,
                  project.recordModel,
                  project.overlayModels,
                  prefixesMap,
                  headersMap));
      }
  
  }
  