aboutsummaryrefslogtreecommitdiffstats
path: root/src/eu/siacs/conversations/persistance/FileBackend.java
blob: c00b197b6dc8d506f08a95bfbb05559b26000616 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
package eu.siacs.conversations.persistance;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.DigestOutputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.RectF;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Environment;
import android.util.Base64;
import android.util.Base64OutputStream;
import android.util.Log;
import android.util.LruCache;
import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.services.ImageProvider;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.xmpp.jingle.JingleFile;
import eu.siacs.conversations.xmpp.pep.Avatar;

public class FileBackend {

	private static int IMAGE_SIZE = 1920;

	private Context context;
	private LruCache<String, Bitmap> thumbnailCache;

	public FileBackend(Context context) {
		this.context = context;
		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
		int cacheSize = maxMemory / 8;
		thumbnailCache = new LruCache<String, Bitmap>(cacheSize) {
			@Override
			protected int sizeOf(String key, Bitmap bitmap) {
				return bitmap.getByteCount() / 1024;
			}
		};

	}

	public LruCache<String, Bitmap> getThumbnailCache() {
		return thumbnailCache;
	}

	public JingleFile getJingleFileLegacy(Message message) {
		return getJingleFileLegacy(message, true);
	}

	public JingleFile getJingleFileLegacy(Message message, boolean decrypted) {
		Conversation conversation = message.getConversation();
		String prefix = context.getFilesDir().getAbsolutePath();
		String path = prefix + "/" + conversation.getAccount().getJid() + "/"
				+ conversation.getContactJid();
		String filename;
		if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
			filename = message.getUuid() + ".webp";
		} else {
			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
				filename = message.getUuid() + ".webp";
			} else {
				filename = message.getUuid() + ".webp.pgp";
			}
		}
		return new JingleFile(path + "/" + filename);
	}
	
	public JingleFile getJingleFile(Message message) {
		return getJingleFile(message, true);
	}

	public JingleFile getJingleFile(Message message, boolean decrypted) {
		StringBuilder filename = new StringBuilder();
		filename.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsolutePath());
		filename.append("/Conversations/");
		filename.append(message.getUuid());
		if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
			filename.append(".webp");
		} else {
			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
				filename.append(".webp");
			} else {
				filename.append(".webp.pgp");
			}
		}
		return new JingleFile(filename.toString());
	}
	
	public Bitmap resize(Bitmap originalBitmap, int size) {
		int w = originalBitmap.getWidth();
		int h = originalBitmap.getHeight();
		if (Math.max(w, h) > size) {
			int scalledW;
			int scalledH;
			if (w <= h) {
				scalledW = (int) (w / ((double) h / size));
				scalledH = size;
			} else {
				scalledW = size;
				scalledH = (int) (h / ((double) w / size));
			}
			Bitmap scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
					scalledW, scalledH, true);
			return scalledBitmap;
		} else {
			return originalBitmap;
		}
	}

	public Bitmap rotate(Bitmap bitmap, int degree) {
		int w = bitmap.getWidth();
		int h = bitmap.getHeight();
		Matrix mtx = new Matrix();
		mtx.postRotate(degree);
		return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
	}

	public JingleFile copyImageToPrivateStorage(Message message, Uri image)
			throws ImageCopyException {
		return this.copyImageToPrivateStorage(message, image, 0);
	}

	private JingleFile copyImageToPrivateStorage(Message message, Uri image,
			int sampleSize) throws ImageCopyException {
		try {
			InputStream is;
			if (image != null) {
				is = context.getContentResolver().openInputStream(image);
			} else {
				is = new FileInputStream(getIncomingFile());
				image = getIncomingUri();
			}
			JingleFile file = getJingleFile(message);
			file.getParentFile().mkdirs();
			file.createNewFile();
			Bitmap originalBitmap;
			BitmapFactory.Options options = new BitmapFactory.Options();
			int inSampleSize = (int) Math.pow(2, sampleSize);
			Log.d("xmppService", "reading bitmap with sample size "
					+ inSampleSize);
			options.inSampleSize = inSampleSize;
			originalBitmap = BitmapFactory.decodeStream(is, null, options);
			is.close();
			if (originalBitmap == null) {
				throw new ImageCopyException(R.string.error_not_an_image_file);
			}
			if (image == null) {
				getIncomingFile().delete();
			}
			Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
			originalBitmap = null;
			ExifInterface exif = new ExifInterface(image.toString());
			if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
					.equalsIgnoreCase("6")) {
				scalledBitmap = rotate(scalledBitmap, 90);
			} else if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
					.equalsIgnoreCase("8")) {
				scalledBitmap = rotate(scalledBitmap, 270);
			} else if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
					.equalsIgnoreCase("3")) {
				scalledBitmap = rotate(scalledBitmap, 180);
			}
			OutputStream os = new FileOutputStream(file);
			boolean success = scalledBitmap.compress(
					Bitmap.CompressFormat.WEBP, 75, os);
			if (!success) {
				throw new ImageCopyException(R.string.error_compressing_image);
			}
			os.flush();
			os.close();
			long size = file.getSize();
			int width = scalledBitmap.getWidth();
			int height = scalledBitmap.getHeight();
			message.setBody("" + size + "," + width + "," + height);
			return file;
		} catch (FileNotFoundException e) {
			throw new ImageCopyException(R.string.error_file_not_found);
		} catch (IOException e) {
			throw new ImageCopyException(R.string.error_io_exception);
		} catch (SecurityException e) {
			throw new ImageCopyException(
					R.string.error_security_exception_during_image_copy);
		} catch (OutOfMemoryError e) {
			++sampleSize;
			if (sampleSize <= 3) {
				return copyImageToPrivateStorage(message, image, sampleSize);
			} else {
				throw new ImageCopyException(R.string.error_out_of_memory);
			}
		}
	}

	public Bitmap getImageFromMessage(Message message) {
		return BitmapFactory.decodeFile(getJingleFile(message)
				.getAbsolutePath());
	}

	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
			throws FileNotFoundException {
		Bitmap thumbnail = thumbnailCache.get(message.getUuid());
		if ((thumbnail == null) && (!cacheOnly)) {
			File file = getJingleFile(message);
			if (!file.exists()) {
				file = getJingleFileLegacy(message);
			}
			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath());
			if (fullsize == null) {
				throw new FileNotFoundException();
			}
			thumbnail = resize(fullsize, size);
			this.thumbnailCache.put(message.getUuid(), thumbnail);
		}
		return thumbnail;
	}

	public void removeFiles(Conversation conversation) {
		String prefix = context.getFilesDir().getAbsolutePath();
		String path = prefix + "/" + conversation.getAccount().getJid() + "/"
				+ conversation.getContactJid();
		File file = new File(path);
		try {
			this.deleteFile(file);
		} catch (IOException e) {
			Log.d("xmppService",
					"error deleting file: " + file.getAbsolutePath());
		}
	}

	private void deleteFile(File f) throws IOException {
		if (f.isDirectory()) {
			for (File c : f.listFiles())
				deleteFile(c);
		}
		f.delete();
	}

	public File getIncomingFile() {
		return new File(context.getFilesDir().getAbsolutePath() + "/incoming");
	}

	public Uri getIncomingUri() {
		return Uri.parse(context.getFilesDir().getAbsolutePath() + "/incoming");
	}
	
	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
		try {
			Avatar avatar = new Avatar();
			Bitmap bm = cropCenterSquare(image, size);
			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
			Base64OutputStream mBase64OutputSttream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
			MessageDigest digest = MessageDigest.getInstance("SHA-1");
			DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputSttream, digest);
			if (!bm.compress(format, 75, mDigestOutputStream)) {
				return null;
			}
			mDigestOutputStream.flush();
			mDigestOutputStream.close();
			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
			avatar.image = new String(mByteArrayOutputStream.toByteArray());
			return avatar;
		} catch (NoSuchAlgorithmException e) {
			return null;
		} catch (IOException e) {
			return null;
		}
	}
	
	public boolean isAvatarCached(Avatar avatar) {
		File file = new File(getAvatarPath(context, avatar.getFilename()));
		return file.exists();
	}
	
	public boolean save(Avatar avatar) {
		if (isAvatarCached(avatar)) {
			return true;
		}
		String filename = getAvatarPath(context, avatar.getFilename());
		File file = new File(filename+".tmp");
		file.getParentFile().mkdirs();
		try {
			file.createNewFile();
			FileOutputStream mFileOutputStream = new FileOutputStream(file);
			MessageDigest digest = MessageDigest.getInstance("SHA-1");
			digest.reset();
			DigestOutputStream mDigestOutputStream = new DigestOutputStream(mFileOutputStream, digest);
			mDigestOutputStream.write(avatar.getImageAsBytes());
			mDigestOutputStream.flush();
			mDigestOutputStream.close();
			avatar.size = file.length();
			String sha1sum = CryptoHelper.bytesToHex(digest.digest());
			if (sha1sum.equals(avatar.sha1sum)) {
				file.renameTo(new File(filename));
				return true;
			} else {
				Log.d("xmppService","sha1sum mismatch for "+avatar.owner);
				file.delete();
				return false;
			}
		} catch (FileNotFoundException e) {
			return false;
		} catch (IOException e) {
			return false;
		} catch (NoSuchAlgorithmException e) {
			return false;
		}
	}
	
	public static String getAvatarPath(Context context, String avatar) {
		return context.getFilesDir().getAbsolutePath() + "/avatars/"+avatar;
	}

	public Bitmap cropCenterSquare(Uri image, int size) {
		try {
			BitmapFactory.Options options = new BitmapFactory.Options();
			options.inSampleSize = calcSampleSize(image, size);
			InputStream is = context.getContentResolver()
					.openInputStream(image);
			Bitmap input = BitmapFactory.decodeStream(is, null, options);
			int w = input.getWidth();
			int h = input.getHeight();

			float scale = Math.max((float) size / h, (float) size / w);

			float outWidth = scale * w;
			float outHeight = scale * h;
			float left = (size - outWidth) / 2;
			float top = (size - outHeight) / 2;
			RectF target = new RectF(left, top, left + outWidth, top
					+ outHeight);

			Bitmap output = Bitmap.createBitmap(size, size, input.getConfig());
			Canvas canvas = new Canvas(output);
			canvas.drawBitmap(input, null, target, null);
			return output;
		} catch (FileNotFoundException e) {
			return null;
		}
	}

	private int calcSampleSize(Uri image, int size)
			throws FileNotFoundException {
		BitmapFactory.Options options = new BitmapFactory.Options();
		options.inJustDecodeBounds = true;
		BitmapFactory.decodeStream(context.getContentResolver()
				.openInputStream(image), null, options);
		int height = options.outHeight;
		int width = options.outWidth;
		int inSampleSize = 1;

		if (height > size || width > size) {
			int halfHeight = height / 2;
			int halfWidth = width / 2;

			while ((halfHeight / inSampleSize) > size
					&& (halfWidth / inSampleSize) > size) {
				inSampleSize *= 2;
			}
		}
		return inSampleSize;

	}
	
	public Uri getJingleFileUri(Message message) {
		File file = getJingleFile(message);
		if (file.exists()) {
			return Uri.parse("file://"+file.getAbsolutePath());
		} else {
			return ImageProvider.getProviderUri(message);
		}
	}

	public class ImageCopyException extends Exception {
		private static final long serialVersionUID = -1010013599132881427L;
		private int resId;

		public ImageCopyException(int resId) {
			this.resId = resId;
		}

		public int getResId() {
			return resId;
		}
	}
}