| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * 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.android.storagemanager.deletionhelper; |
| |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.media.ThumbnailUtils; |
| import android.os.SystemProperties; |
| import android.provider.MediaStore; |
| import androidx.annotation.VisibleForTesting; |
| import android.text.format.DateUtils; |
| |
| import com.android.storagemanager.utils.AsyncLoader; |
| import com.android.storagemanager.utils.IconProvider; |
| |
| import java.io.File; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| |
| /** |
| * FetchDownloadsLoader is an asynchronous task which returns files in the Downloads |
| * directory which have not been modified in longer than 90 days. |
| */ |
| public class FetchDownloadsLoader extends AsyncLoader<FetchDownloadsLoader.DownloadsResult> { |
| private static final String DEBUG_FILE_AGE_OVERRIDE = "debug.asm.file_age_limit"; |
| private static final int MINIMUM_AGE_DAYS = 0; |
| private File mDirectory; |
| |
| /** |
| * Sets up a FetchDownloadsLoader in any directory. |
| * |
| * @param directory The directory to look into. |
| */ |
| public FetchDownloadsLoader(Context context, File directory) { |
| super(context); |
| mDirectory = directory; |
| } |
| |
| @Override |
| protected void onDiscardResult(DownloadsResult result) { |
| } |
| |
| @Override |
| public DownloadsResult loadInBackground() { |
| return collectFiles(mDirectory); |
| } |
| |
| @VisibleForTesting |
| static DownloadsResult collectFiles(File dir) { |
| return collectFiles(dir, new DownloadsResult()); |
| } |
| |
| private static DownloadsResult collectFiles(File dir, DownloadsResult result) { |
| int minimumAgeDays = SystemProperties.getInt(DEBUG_FILE_AGE_OVERRIDE, MINIMUM_AGE_DAYS); |
| final long last_modified_threshold = System.currentTimeMillis() - |
| minimumAgeDays * DateUtils.DAY_IN_MILLIS; |
| File downloadFiles[] = dir.listFiles(); |
| if (downloadFiles != null && downloadFiles.length > 0) { |
| for (File currentFile : downloadFiles) { |
| if (currentFile.isDirectory()) { |
| collectFiles(currentFile, result); |
| } else { |
| // Skip files that have been modified too recently. |
| if (last_modified_threshold < currentFile.lastModified()) { |
| continue; |
| } |
| |
| if (currentFile.lastModified() < result.youngestLastModified) { |
| result.youngestLastModified = currentFile.lastModified(); |
| } |
| result.files.add(currentFile); |
| result.totalSize += currentFile.length(); |
| |
| if (IconProvider.isImageType(currentFile)) { |
| Bitmap thumbnail = |
| ThumbnailUtils.createImageThumbnail( |
| currentFile.getAbsolutePath(), |
| MediaStore.Images.Thumbnails.MINI_KIND); |
| result.thumbnails.put(currentFile, thumbnail); |
| } |
| } |
| } |
| } |
| |
| return result; |
| } |
| |
| /** |
| * The DownloadsResult is the result of a {@link FetchDownloadsLoader} with the files |
| * and the amount of space they use. |
| */ |
| public static class DownloadsResult { |
| public long totalSize; |
| public long youngestLastModified; |
| public ArrayList<File> files; |
| public HashMap<File, Bitmap> thumbnails; |
| |
| public DownloadsResult() { |
| this(0, Long.MAX_VALUE, new ArrayList<File>(), new HashMap<>()); |
| } |
| |
| public DownloadsResult( |
| long totalSize, |
| long youngestLastModified, |
| ArrayList<File> files, |
| HashMap<File, Bitmap> thumbnails) { |
| this.totalSize = totalSize; |
| this.youngestLastModified = youngestLastModified; |
| this.files = files; |
| this.thumbnails = thumbnails; |
| } |
| } |
| } |