/*
 * Copyright 2016 The Bazel Authors. All rights reserved.
 *
 * 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.google.idea.blaze.base.io;

import com.google.idea.blaze.base.model.primitives.WorkspacePath;
import com.google.idea.blaze.base.model.primitives.WorkspaceRoot;
import com.intellij.openapi.vfs.LocalFileSystem;
import com.intellij.openapi.vfs.VirtualFile;

/**
 * Checks the workspace using the VFS.
 */
class VfsWorkspaceScanner implements WorkspaceScanner {
  private final LocalFileSystem localFileSystem;

  public VfsWorkspaceScanner() {
    this.localFileSystem = LocalFileSystem.getInstance();
  }

  @Override
  public boolean exists(WorkspaceRoot workspaceRoot, WorkspacePath workspacePath) {
    VirtualFile virtualFile = localFileSystem.refreshAndFindFileByPath(
      workspaceRoot.fileForPath(workspacePath).getPath()
    );
    return virtualFile != null && virtualFile.exists();
  }
}