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 * 
 * Copyright 2010, Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
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 * 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.
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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package com.google.refine.commands.workspace;

import java.io.IOException;
import java.util.Collections;
import java.util.Map;
import java.util.Set;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.refine.ProjectManager;
import com.google.refine.commands.Command;

public class GetAllProjectTagsCommand extends Command {
    
  public static class AllProjectsTags  {
      
    @JsonProperty("tags")
    protected Set<String> tags;
    
    protected AllProjectsTags(Set<String> tags) {
        this.tags = tags;
    }
  }

  @Override
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {

     Map<String, Integer> tagMap = ProjectManager.singleton.getAllProjectTags();
     Set<String> tags = tagMap == null ? Collections.emptySet() : tagMap.keySet();
     respondJSON(response, new AllProjectsTags(tags));
  }
}