1package eu.siacs.conversations.persistance;
  2
  3import java.io.ByteArrayOutputStream;
  4import java.io.File;
  5import java.io.FileNotFoundException;
  6import java.io.FileOutputStream;
  7import java.io.IOException;
  8import java.io.InputStream;
  9import java.io.OutputStream;
 10import java.security.DigestOutputStream;
 11import java.security.MessageDigest;
 12import java.security.NoSuchAlgorithmException;
 13import java.text.SimpleDateFormat;
 14import java.util.Date;
 15import java.util.Locale;
 16
 17import android.content.Context;
 18import android.database.Cursor;
 19import android.graphics.Bitmap;
 20import android.graphics.BitmapFactory;
 21import android.graphics.Canvas;
 22import android.graphics.Matrix;
 23import android.graphics.RectF;
 24import android.media.ExifInterface;
 25import android.net.Uri;
 26import android.os.Environment;
 27import android.provider.MediaStore;
 28import android.util.Base64;
 29import android.util.Base64OutputStream;
 30import android.util.Log;
 31import android.util.LruCache;
 32import eu.siacs.conversations.R;
 33import eu.siacs.conversations.entities.Conversation;
 34import eu.siacs.conversations.entities.Message;
 35import eu.siacs.conversations.services.ImageProvider;
 36import eu.siacs.conversations.utils.CryptoHelper;
 37import eu.siacs.conversations.utils.UIHelper;
 38import eu.siacs.conversations.xmpp.jingle.JingleFile;
 39import eu.siacs.conversations.xmpp.pep.Avatar;
 40
 41public class FileBackend {
 42
 43	private static int IMAGE_SIZE = 1920;
 44
 45	private Context context;
 46	private LruCache<String, Bitmap> thumbnailCache;
 47	
 48	private SimpleDateFormat imageDateFormat = new SimpleDateFormat("yyyyMMdd_HHmmssSSS",Locale.US);
 49
 50	public FileBackend(Context context) {
 51		this.context = context;
 52		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
 53		int cacheSize = maxMemory / 8;
 54		thumbnailCache = new LruCache<String, Bitmap>(cacheSize) {
 55			@Override
 56			protected int sizeOf(String key, Bitmap bitmap) {
 57				return bitmap.getByteCount() / 1024;
 58			}
 59		};
 60
 61	}
 62
 63	public LruCache<String, Bitmap> getThumbnailCache() {
 64		return thumbnailCache;
 65	}
 66
 67	public JingleFile getJingleFileLegacy(Message message) {
 68		return getJingleFileLegacy(message, true);
 69	}
 70
 71	public JingleFile getJingleFileLegacy(Message message, boolean decrypted) {
 72		Conversation conversation = message.getConversation();
 73		String prefix = context.getFilesDir().getAbsolutePath();
 74		String path = prefix + "/" + conversation.getAccount().getJid() + "/"
 75				+ conversation.getContactJid();
 76		String filename;
 77		if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
 78			filename = message.getUuid() + ".webp";
 79		} else {
 80			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 81				filename = message.getUuid() + ".webp";
 82			} else {
 83				filename = message.getUuid() + ".webp.pgp";
 84			}
 85		}
 86		return new JingleFile(path + "/" + filename);
 87	}
 88	
 89	public JingleFile getJingleFile(Message message) {
 90		return getJingleFile(message, true);
 91	}
 92
 93	public JingleFile getJingleFile(Message message, boolean decrypted) {
 94		StringBuilder filename = new StringBuilder();
 95		filename.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsolutePath());
 96		filename.append("/Conversations/");
 97		filename.append(message.getUuid());
 98		if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
 99			filename.append(".webp");
100		} else {
101			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
102				filename.append(".webp");
103			} else {
104				filename.append(".webp.pgp");
105			}
106		}
107		return new JingleFile(filename.toString());
108	}
109	
110	public Bitmap resize(Bitmap originalBitmap, int size) {
111		int w = originalBitmap.getWidth();
112		int h = originalBitmap.getHeight();
113		if (Math.max(w, h) > size) {
114			int scalledW;
115			int scalledH;
116			if (w <= h) {
117				scalledW = (int) (w / ((double) h / size));
118				scalledH = size;
119			} else {
120				scalledW = size;
121				scalledH = (int) (h / ((double) w / size));
122			}
123			Bitmap scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
124					scalledW, scalledH, true);
125			return scalledBitmap;
126		} else {
127			return originalBitmap;
128		}
129	}
130
131	public Bitmap rotate(Bitmap bitmap, int degree) {
132		int w = bitmap.getWidth();
133		int h = bitmap.getHeight();
134		Matrix mtx = new Matrix();
135		mtx.postRotate(degree);
136		return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
137	}
138
139	public JingleFile copyImageToPrivateStorage(Message message, Uri image)
140			throws ImageCopyException {
141		return this.copyImageToPrivateStorage(message, image, 0);
142	}
143
144	private JingleFile copyImageToPrivateStorage(Message message, Uri image,
145			int sampleSize) throws ImageCopyException {
146		try {
147			InputStream is = context.getContentResolver().openInputStream(image);
148			JingleFile file = getJingleFile(message);
149			file.getParentFile().mkdirs();
150			file.createNewFile();
151			Bitmap originalBitmap;
152			BitmapFactory.Options options = new BitmapFactory.Options();
153			int inSampleSize = (int) Math.pow(2, sampleSize);
154			Log.d("xmppService", "reading bitmap with sample size "
155					+ inSampleSize);
156			options.inSampleSize = inSampleSize;
157			originalBitmap = BitmapFactory.decodeStream(is, null, options);
158			is.close();
159			if (originalBitmap == null) {
160				throw new ImageCopyException(R.string.error_not_an_image_file);
161			}
162			Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
163			originalBitmap = null;
164			int rotation = getRotation(image);
165			if (rotation > 0) {
166				scalledBitmap = rotate(scalledBitmap, rotation);
167			}
168			OutputStream os = new FileOutputStream(file);
169			boolean success = scalledBitmap.compress(
170					Bitmap.CompressFormat.WEBP, 75, os);
171			if (!success) {
172				throw new ImageCopyException(R.string.error_compressing_image);
173			}
174			os.flush();
175			os.close();
176			long size = file.getSize();
177			int width = scalledBitmap.getWidth();
178			int height = scalledBitmap.getHeight();
179			message.setBody("" + size + "," + width + "," + height);
180			return file;
181		} catch (FileNotFoundException e) {
182			throw new ImageCopyException(R.string.error_file_not_found);
183		} catch (IOException e) {
184			throw new ImageCopyException(R.string.error_io_exception);
185		} catch (SecurityException e) {
186			throw new ImageCopyException(
187					R.string.error_security_exception_during_image_copy);
188		} catch (OutOfMemoryError e) {
189			++sampleSize;
190			if (sampleSize <= 3) {
191				return copyImageToPrivateStorage(message, image, sampleSize);
192			} else {
193				throw new ImageCopyException(R.string.error_out_of_memory);
194			}
195		}
196	}
197	
198	private int getRotation(Uri image) {
199		if ("content".equals(image.getScheme())) {
200	        Cursor cursor = context.getContentResolver().query(image,
201	                new String[] { MediaStore.Images.ImageColumns.ORIENTATION }, null, null, null);
202
203	        if (cursor.getCount() != 1) {
204	            return -1;
205	        }
206	        cursor.moveToFirst();
207	        return cursor.getInt(0);
208		} else {
209			ExifInterface exif;
210			try {
211				exif = new ExifInterface(image.toString());
212				if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
213						.equalsIgnoreCase("6")) {
214					return 90;
215				} else if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
216						.equalsIgnoreCase("8")) {
217					return 270;
218				} else if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
219						.equalsIgnoreCase("3")) {
220					return 180;
221				} else {
222					return 0;
223				}
224			} catch (IOException e) {
225				return -1;
226			}
227		}
228	}
229
230	public Bitmap getImageFromMessage(Message message) {
231		return BitmapFactory.decodeFile(getJingleFile(message)
232				.getAbsolutePath());
233	}
234
235	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
236			throws FileNotFoundException {
237		Bitmap thumbnail = thumbnailCache.get(message.getUuid());
238		if ((thumbnail == null) && (!cacheOnly)) {
239			File file = getJingleFile(message);
240			if (!file.exists()) {
241				file = getJingleFileLegacy(message);
242			}
243			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath());
244			if (fullsize == null) {
245				throw new FileNotFoundException();
246			}
247			thumbnail = resize(fullsize, size);
248			this.thumbnailCache.put(message.getUuid(), thumbnail);
249		}
250		return thumbnail;
251	}
252
253	public void removeFiles(Conversation conversation) {
254		String prefix = context.getFilesDir().getAbsolutePath();
255		String path = prefix + "/" + conversation.getAccount().getJid() + "/"
256				+ conversation.getContactJid();
257		File file = new File(path);
258		try {
259			this.deleteFile(file);
260		} catch (IOException e) {
261			Log.d("xmppService",
262					"error deleting file: " + file.getAbsolutePath());
263		}
264	}
265
266	private void deleteFile(File f) throws IOException {
267		if (f.isDirectory()) {
268			for (File c : f.listFiles())
269				deleteFile(c);
270		}
271		f.delete();
272	}
273
274	public Uri getTakePhotoUri() {
275		StringBuilder pathBuilder = new StringBuilder();
276		pathBuilder.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
277		pathBuilder.append('/');
278		pathBuilder.append("Camera");
279		pathBuilder.append('/');
280		pathBuilder.append("IMG_"+this.imageDateFormat.format(new Date())+".jpg");
281		Uri uri = Uri.parse("file://"+pathBuilder.toString());
282		File file = new File(uri.toString());
283		file.getParentFile().mkdirs();
284		return uri;
285	}
286	
287	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
288		try {
289			Avatar avatar = new Avatar();
290			Bitmap bm = cropCenterSquare(image, size);
291			if (bm==null) {
292				return null;
293			}
294			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
295			Base64OutputStream mBase64OutputSttream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
296			MessageDigest digest = MessageDigest.getInstance("SHA-1");
297			DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputSttream, digest);
298			if (!bm.compress(format, 75, mDigestOutputStream)) {
299				return null;
300			}
301			mDigestOutputStream.flush();
302			mDigestOutputStream.close();
303			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
304			avatar.image = new String(mByteArrayOutputStream.toByteArray());
305			return avatar;
306		} catch (NoSuchAlgorithmException e) {
307			return null;
308		} catch (IOException e) {
309			return null;
310		}
311	}
312	
313	public boolean isAvatarCached(Avatar avatar) {
314		File file = new File(getAvatarPath(context, avatar.getFilename()));
315		return file.exists();
316	}
317	
318	public boolean save(Avatar avatar) {
319		if (isAvatarCached(avatar)) {
320			return true;
321		}
322		String filename = getAvatarPath(context, avatar.getFilename());
323		File file = new File(filename+".tmp");
324		file.getParentFile().mkdirs();
325		try {
326			file.createNewFile();
327			FileOutputStream mFileOutputStream = new FileOutputStream(file);
328			MessageDigest digest = MessageDigest.getInstance("SHA-1");
329			digest.reset();
330			DigestOutputStream mDigestOutputStream = new DigestOutputStream(mFileOutputStream, digest);
331			mDigestOutputStream.write(avatar.getImageAsBytes());
332			mDigestOutputStream.flush();
333			mDigestOutputStream.close();
334			avatar.size = file.length();
335			String sha1sum = CryptoHelper.bytesToHex(digest.digest());
336			if (sha1sum.equals(avatar.sha1sum)) {
337				file.renameTo(new File(filename));
338				return true;
339			} else {
340				Log.d("xmppService","sha1sum mismatch for "+avatar.owner);
341				file.delete();
342				return false;
343			}
344		} catch (FileNotFoundException e) {
345			return false;
346		} catch (IOException e) {
347			return false;
348		} catch (NoSuchAlgorithmException e) {
349			return false;
350		}
351	}
352	
353	public static String getAvatarPath(Context context, String avatar) {
354		return context.getFilesDir().getAbsolutePath() + "/avatars/"+avatar;
355	}
356
357	public Bitmap cropCenterSquare(Uri image, int size) {
358		try {
359			BitmapFactory.Options options = new BitmapFactory.Options();
360			options.inSampleSize = calcSampleSize(image, size);
361			InputStream is = context.getContentResolver()
362					.openInputStream(image);
363			Bitmap input = BitmapFactory.decodeStream(is, null, options);
364			if (input==null) {
365				return null;
366			} else {
367				return cropCenterSquare(input, size);
368			}
369		} catch (FileNotFoundException e) {
370			return null;
371		}
372	}
373	
374	public static Bitmap cropCenterSquare(Bitmap input, int size) {
375		int w = input.getWidth();
376		int h = input.getHeight();
377
378		float scale = Math.max((float) size / h, (float) size / w);
379
380		float outWidth = scale * w;
381		float outHeight = scale * h;
382		float left = (size - outWidth) / 2;
383		float top = (size - outHeight) / 2;
384		RectF target = new RectF(left, top, left + outWidth, top
385				+ outHeight);
386
387		Bitmap output = Bitmap.createBitmap(size, size, input.getConfig());
388		Canvas canvas = new Canvas(output);
389		canvas.drawBitmap(input, null, target, null);
390		return output;
391	}
392
393	private int calcSampleSize(Uri image, int size)
394			throws FileNotFoundException {
395		BitmapFactory.Options options = new BitmapFactory.Options();
396		options.inJustDecodeBounds = true;
397		BitmapFactory.decodeStream(context.getContentResolver()
398				.openInputStream(image), null, options);
399		int height = options.outHeight;
400		int width = options.outWidth;
401		int inSampleSize = 1;
402
403		if (height > size || width > size) {
404			int halfHeight = height / 2;
405			int halfWidth = width / 2;
406
407			while ((halfHeight / inSampleSize) > size
408					&& (halfWidth / inSampleSize) > size) {
409				inSampleSize *= 2;
410			}
411		}
412		return inSampleSize;
413
414	}
415	
416	public Uri getJingleFileUri(Message message) {
417		File file = getJingleFile(message);
418		if (file.exists()) {
419			return Uri.parse("file://"+file.getAbsolutePath());
420		} else {
421			return ImageProvider.getProviderUri(message);
422		}
423	}
424
425	public class ImageCopyException extends Exception {
426		private static final long serialVersionUID = -1010013599132881427L;
427		private int resId;
428
429		public ImageCopyException(int resId) {
430			this.resId = resId;
431		}
432
433		public int getResId() {
434			return resId;
435		}
436	}
437
438	public static Bitmap getAvatar(String avatar, int size, Context context) {
439		Bitmap bm = BitmapFactory.decodeFile(FileBackend.getAvatarPath(context, avatar));
440		if (bm==null) {
441			return null;
442		}
443		return cropCenterSquare(bm, UIHelper.getRealPx(size, context));
444	}
445}