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A packaging of the IntelliJ Community Edition platform-impl library. This is release number 1 of trunk branch 142.

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/*
 * Copyright 2000-2009 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.openapi.vfs.impl.http;

import com.intellij.openapi.application.PathManager;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.openapi.util.io.FileUtilRt;
import com.intellij.util.PathUtilRt;
import com.intellij.util.Url;
import org.jetbrains.annotations.NotNull;

import java.io.File;
import java.io.IOException;

/**
 * @author nik
 */
public class LocalFileStorage {
  private final File myStorageIODirectory;

  public LocalFileStorage() {
    myStorageIODirectory = new File(PathManager.getSystemPath(), "httpFileSystem");
    //noinspection ResultOfMethodCallIgnored
    myStorageIODirectory.mkdirs();
  }

  public File createLocalFile(@NotNull Url url) throws IOException {
    String baseName = PathUtilRt.getFileName(url.getPath());
    int index = baseName.lastIndexOf('.');
    String prefix = index == -1 ? baseName : baseName.substring(0, index);
    String suffix = index == -1 ? "" : baseName.substring(index+1);
    prefix = PathUtilRt.suggestFileName(prefix);
    suffix = PathUtilRt.suggestFileName(suffix);
    File file = FileUtil.findSequentNonexistentFile(myStorageIODirectory, prefix, suffix);
    FileUtilRt.createIfNotExists(file);
    return file;
  }

  public void deleteDownloadedFiles() {
    FileUtil.delete(myStorageIODirectory);
  }
}