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/*
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* Copyright (C) 2016 Álinson Santos Xavier <isoron@gmail.com>
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*
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* This file is part of Loop Habit Tracker.
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*
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* Loop Habit Tracker is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* Loop Habit Tracker is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.isoron.uhabits.utils;
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import android.content.Context;
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import android.os.Environment;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.support.v4.content.ContextCompat;
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import android.util.Log;
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import org.isoron.uhabits.HabitsApplication;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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public abstract class FileUtils
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{
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public static void copy(File src, File dst) throws IOException
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{
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FileInputStream inStream = new FileInputStream(src);
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FileOutputStream outStream = new FileOutputStream(dst);
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copy(inStream, outStream);
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}
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public static void copy(InputStream inStream, File dst) throws IOException
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{
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FileOutputStream outStream = new FileOutputStream(dst);
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copy(inStream, outStream);
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}
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public static void copy(InputStream in, OutputStream out) throws IOException
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{
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int numBytes;
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byte[] buffer = new byte[1024];
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while ((numBytes = in.read(buffer)) != -1)
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out.write(buffer, 0, numBytes);
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}
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@Nullable
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public static File getSDCardDir(@Nullable String relativePath)
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{
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File parents[] = new File[]{ Environment.getExternalStorageDirectory() };
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return getDir(parents, relativePath);
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}
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@Nullable
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public static File getFilesDir(@Nullable String relativePath)
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{
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Context context = HabitsApplication.getContext();
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if(context == null)
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{
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Log.e("DatabaseHelper", "getFilesDir: no application context available");
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return null;
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}
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File externalFilesDirs[] = ContextCompat.getExternalFilesDirs(context, null);
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if(externalFilesDirs == null)
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{
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Log.e("DatabaseHelper", "getFilesDir: getExternalFilesDirs returned null");
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return null;
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}
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return getDir(externalFilesDirs, relativePath);
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}
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@Nullable
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private static File getDir(@NonNull File potentialParentDirs[], @Nullable String relativePath)
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{
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if(relativePath == null) relativePath = "";
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File chosenDir = null;
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for(File dir : potentialParentDirs)
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{
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if (dir == null || !dir.canWrite()) continue;
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chosenDir = dir;
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break;
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}
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if(chosenDir == null)
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{
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Log.e("DatabaseHelper", "getDir: all potential parents are null or non-writable");
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return null;
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}
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File dir = new File(String.format("%s/%s/", chosenDir.getAbsolutePath(), relativePath));
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if (!dir.exists() && !dir.mkdirs())
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{
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Log.e("DatabaseHelper", "getDir: chosen dir does not exist and cannot be created");
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return null;
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}
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return dir;
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}
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}
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