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/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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 com.intellij.ide.actions;

import com.intellij.ide.IdeBundle;
import com.intellij.ide.highlighter.ProjectFileType;
import com.intellij.ide.impl.ProjectUtil;
import com.intellij.openapi.actionSystem.ActionPlaces;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.PlatformDataKeys;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.fileChooser.FileChooser;
import com.intellij.openapi.fileChooser.FileChooserDescriptor;
import com.intellij.openapi.fileChooser.PathChooserDialog;
import com.intellij.openapi.project.DumbAware;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.SystemInfo;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.vfs.VfsUtil;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.projectImport.ProjectOpenProcessor;
import com.intellij.projectImport.ProjectOpenProcessorBase;
import com.intellij.util.Consumer;

import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

public class OpenProjectAction extends AnAction implements DumbAware {
  public void actionPerformed(AnActionEvent e) {
    final FileChooserDescriptor descriptor = new OpenProjectFileChooserDescriptor(true);
    descriptor.setTitle(IdeBundle.message("title.open.project"));
    final Set<String> extensions = new LinkedHashSet<String>();
    extensions.add(ProjectFileType.DOT_DEFAULT_EXTENSION);
    final ProjectOpenProcessor[] openProcessors = Extensions.getExtensions(ProjectOpenProcessor.EXTENSION_POINT_NAME);
    for (ProjectOpenProcessor openProcessor : openProcessors) {
      if (!(openProcessor instanceof ProjectOpenProcessorBase)) continue;
      final String[] supportedExtensions = ((ProjectOpenProcessorBase)openProcessor).getSupportedExtensions();
      if (supportedExtensions != null) {
        Collections.addAll(extensions, supportedExtensions);
      }
    }
    descriptor.setDescription(IdeBundle.message("filter.project.files", StringUtil.join(extensions, ", ")));

    VirtualFile userHomeDir = null;
    if (SystemInfo.isUnix) {
      userHomeDir = VfsUtil.getUserHomeDir();
    }

    descriptor.putUserData(PathChooserDialog.PREFER_LAST_OVER_EXPLICIT, Boolean.TRUE);

    final Project project = CommonDataKeys.PROJECT.getData(e.getDataContext());
    FileChooser.chooseFiles(descriptor, project, userHomeDir, new Consumer<List<VirtualFile>>() {
      @Override
      public void consume(final List<VirtualFile> files) {
        if (files.size() == 1) {
          ProjectUtil.openOrImport(files.get(0).getPath(), project, false);
        }
      }
    });
  }

  @Override
  public void update(AnActionEvent e) {
    super.update(e);
    e.getPresentation().setEnabledAndVisible(ActionPlaces.WELCOME_SCREEN.equals(e.getPlace()));
  }
}