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/**
* Android ownCloud News
*
* @author David Luhmer
* @copyright 2013 David Luhmer david-dev@live.de
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
package de.luhmer.owncloudnewsreader.helper;
import android.content.Context;
import android.graphics.drawable.Drawable;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.math.BigInteger;
import java.net.URL;
import java.security.MessageDigest;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ImageHandler {
//private static final String TAG = "DownloadImagesFromWeb";
public static Drawable LoadImageFromWebOperations(String url) {
try {
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src name");
return d;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public static List<File> getFilesFromDir(File dir) {
List<File> files = new ArrayList<File>();
if(dir.isDirectory())
for (File file : dir.listFiles())
if (file.isFile())
files.add(file);
return files;
}
public static long getFolderSize(File dir) {
long size = 0;
if(dir.isDirectory())
{
for (File file : dir.listFiles()) {
if (file.isFile()) {
size += file.length();
}
else
size += getFolderSize(file);
}
}
return size;
}
public static File getFullPathOfCacheFileSafe(String WEB_URL_TO_FILE, String rootPath) {
try {
return getFullPathOfCacheFile(WEB_URL_TO_FILE, rootPath);
} catch (Exception ex) {
return null;
}
}
public static File getFullPathOfCacheFile(String WEB_URL_TO_FILE, String rootPath) throws Exception
{
URL url = new URL(WEB_URL_TO_FILE.trim());
MessageDigest m = MessageDigest.getInstance("MD5");
m.reset();
m.update(url.toString().getBytes());
byte[] digest = m.digest();
BigInteger bigInt = new BigInteger(1,digest);
String hashtext = bigInt.toString(16);
String fileEnding = "";
try
{
fileEnding = url.getFile().substring(url.getFile().lastIndexOf("."));
fileEnding = fileEnding.replaceAll("\\?(.*)", "");
}
catch(Exception ex)
{
fileEnding = ".png";
//ex.printStackTrace();
}
return new File(rootPath + "/" + hashtext + fileEnding);
}
public static List<String> getImageLinksFromText(String text)
{
List<String> links = new ArrayList<String>();
Pattern pattern = Pattern.compile("<img[^>]*>");
Pattern patternSrcLink = Pattern.compile("src=\"(.*?)\"");
Matcher matcher = pattern.matcher(text);
// Check all occurance
while (matcher.find()) {
//System.out.print("Start index: " + matcher.start());
//System.out.print(" End index: " + matcher.end() + " ");
//System.out.println(matcher.group());
Matcher matcherSrcLink = patternSrcLink.matcher(matcher.group());
if(matcherSrcLink.find()) {
links.add(matcherSrcLink.group(1));
}
}
return links;
}
public static boolean clearCache(Context context)
{
String path = FileUtils.getPath(context);
boolean result = deleteDir(new File(path));
createNoMediaFile(context);
return result;
}
public static void createNoMediaFile(Context context) {
String path = FileUtils.getPath(context);
createEmptyFile(path + "/.nomedia");
}
public static void createEmptyFile(String path) {
try {
File file = new File(path);
if(!file.exists()) {
new File(file.getParent()).mkdirs();
FileOutputStream fOut = new FileOutputStream(file, false);
OutputStreamWriter osw = new OutputStreamWriter(fOut);
osw.flush();
osw.close();
}
} catch(Exception ex) {
ex.printStackTrace();
}
}
// Deletes all files and subdirectories under dir.
// Returns true if all deletions were successful.
// If a deletion fails, the method stops attempting to delete and returns
// false.
private static boolean deleteDir(File dir) {
if (dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
// The directory is now empty so delete it
return dir.delete();
}
/*
public static Bitmap loadBitmap(String url) {
Bitmap bitmap = null;
InputStream in = null;
BufferedOutputStream out = null;
try {
in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
BitmapFactory.Options options = new BitmapFactory.Options();
//options.inSampleSize = 1;
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
} catch (IOException e) {
Log.d(TAG, "Could not load Bitmap from: " + url);
} finally {
closeStream(in);
closeStream(out);
}
return bitmap;
}*/
}
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