yashketkar/video-player

/*
 * Copyright (C) 2012 YIXIA.COM
 *
 * 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 io.vov.vitamio.utils;

import android.net.Uri;
import android.text.TextUtils;

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

public class FileUtils {
    private static final String FILE_NAME_RESERVED = "|\\?*<\":>+[]/'";

    public static String getUniqueFileName(String name, String id) {
        StringBuilder sb = new StringBuilder();
        for (Character c : name.toCharArray()) {
            if (FILE_NAME_RESERVED.indexOf(c) == -1) {
                sb.append(c);
            }
        }
        name = sb.toString();
        if (name.length() > 16) {
            name = name.substring(0, 16);
        }
        id = Crypto.md5(id);
        name += id;
        try {
            File f = File.createTempFile(name, null);
            if (f.exists()) {
                f.delete();
                return name;
            }
        } catch (IOException e) {
        }
        return id;
    }

    public static String getCanonical(File f) {
        if (f == null)
            return null;

        try {
            return f.getCanonicalPath();
        } catch (IOException e) {
            return f.getAbsolutePath();
        }
    }

    /**
     * Get the path for the file:/// only
     * 
     * @param uri
     * @return
     */
    public static String getPath(String uri) {
        Log.i("FileUtils#getPath(%s)", uri);
        if (TextUtils.isEmpty(uri))
            return null;
        if (uri.startsWith("file://") && uri.length() > 7)
            return Uri.decode(uri.substring(7));
        return Uri.decode(uri);
    }

    public static String getName(String uri) {
        String path = getPath(uri);
        if (path != null)
            return new File(path).getName();
        return null;
    }

    public static void deleteDir(File f) {
        if (f.exists() && f.isDirectory()) {
            for (File file : f.listFiles()) {
                if (file.isDirectory())
                    deleteDir(file);
                file.delete();
            }
            f.delete();
        }
    }
}