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.database.Cursor;
18import android.graphics.Bitmap;
19import android.graphics.BitmapFactory;
20import android.graphics.Canvas;
21import android.graphics.Matrix;
22import android.graphics.RectF;
23import android.net.Uri;
24import android.os.Environment;
25import android.provider.MediaStore;
26import android.util.Base64;
27import android.util.Base64OutputStream;
28import android.util.Log;
29import eu.siacs.conversations.Config;
30import eu.siacs.conversations.R;
31import eu.siacs.conversations.entities.DownloadableFile;
32import eu.siacs.conversations.entities.Message;
33import eu.siacs.conversations.services.XmppConnectionService;
34import eu.siacs.conversations.utils.CryptoHelper;
35import eu.siacs.conversations.utils.ExifHelper;
36import eu.siacs.conversations.xmpp.pep.Avatar;
37
38public class FileBackend {
39
40 private static int IMAGE_SIZE = 1920;
41
42 private SimpleDateFormat imageDateFormat = new SimpleDateFormat(
43 "yyyyMMdd_HHmmssSSS", Locale.US);
44
45 private XmppConnectionService mXmppConnectionService;
46
47 public FileBackend(XmppConnectionService service) {
48 this.mXmppConnectionService = service;
49 }
50
51 public DownloadableFile getFile(Message message) {
52 return getFile(message, true);
53 }
54
55 public DownloadableFile getFile(Message message, boolean decrypted) {
56 StringBuilder filename = new StringBuilder();
57 filename.append(getConversationsDirectory());
58 filename.append(message.getUuid());
59 if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
60 filename.append(".webp");
61 } else {
62 if (message.getEncryption() == Message.ENCRYPTION_OTR) {
63 filename.append(".webp");
64 } else {
65 filename.append(".webp.pgp");
66 }
67 }
68 return new DownloadableFile(filename.toString());
69 }
70
71 public static String getConversationsDirectory() {
72 return Environment.getExternalStoragePublicDirectory(
73 Environment.DIRECTORY_PICTURES).getAbsolutePath()
74 + "/Conversations/";
75 }
76
77 public Bitmap resize(Bitmap originalBitmap, int size) {
78 int w = originalBitmap.getWidth();
79 int h = originalBitmap.getHeight();
80 if (Math.max(w, h) > size) {
81 int scalledW;
82 int scalledH;
83 if (w <= h) {
84 scalledW = (int) (w / ((double) h / size));
85 scalledH = size;
86 } else {
87 scalledW = size;
88 scalledH = (int) (h / ((double) w / size));
89 }
90 Bitmap scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
91 scalledW, scalledH, true);
92 return scalledBitmap;
93 } else {
94 return originalBitmap;
95 }
96 }
97
98 public Bitmap rotate(Bitmap bitmap, int degree) {
99 int w = bitmap.getWidth();
100 int h = bitmap.getHeight();
101 Matrix mtx = new Matrix();
102 mtx.postRotate(degree);
103 return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
104 }
105
106 public DownloadableFile copyImageToPrivateStorage(Message message, Uri image)
107 throws ImageCopyException {
108 return this.copyImageToPrivateStorage(message, image, 0);
109 }
110
111 private DownloadableFile copyImageToPrivateStorage(Message message,
112 Uri image, int sampleSize) throws ImageCopyException {
113 try {
114 InputStream is = mXmppConnectionService.getContentResolver()
115 .openInputStream(image);
116 DownloadableFile file = getFile(message);
117 file.getParentFile().mkdirs();
118 file.createNewFile();
119 Bitmap originalBitmap;
120 BitmapFactory.Options options = new BitmapFactory.Options();
121 int inSampleSize = (int) Math.pow(2, sampleSize);
122 Log.d(Config.LOGTAG, "reading bitmap with sample size "
123 + inSampleSize);
124 options.inSampleSize = inSampleSize;
125 originalBitmap = BitmapFactory.decodeStream(is, null, options);
126 is.close();
127 if (originalBitmap == null) {
128 throw new ImageCopyException(R.string.error_not_an_image_file);
129 }
130 Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
131 originalBitmap = null;
132 int rotation = getRotation(image);
133 if (rotation > 0) {
134 scalledBitmap = rotate(scalledBitmap, rotation);
135 }
136 OutputStream os = new FileOutputStream(file);
137 boolean success = scalledBitmap.compress(
138 Bitmap.CompressFormat.WEBP, 75, os);
139 if (!success) {
140 throw new ImageCopyException(R.string.error_compressing_image);
141 }
142 os.flush();
143 os.close();
144 long size = file.getSize();
145 int width = scalledBitmap.getWidth();
146 int height = scalledBitmap.getHeight();
147 message.setBody(Long.toString(size) + ',' + width + ',' + height);
148 return file;
149 } catch (FileNotFoundException e) {
150 throw new ImageCopyException(R.string.error_file_not_found);
151 } catch (IOException e) {
152 throw new ImageCopyException(R.string.error_io_exception);
153 } catch (SecurityException e) {
154 throw new ImageCopyException(
155 R.string.error_security_exception_during_image_copy);
156 } catch (OutOfMemoryError e) {
157 ++sampleSize;
158 if (sampleSize <= 3) {
159 return copyImageToPrivateStorage(message, image, sampleSize);
160 } else {
161 throw new ImageCopyException(R.string.error_out_of_memory);
162 }
163 }
164 }
165
166 private int getRotation(Uri image) {
167 if ("content".equals(image.getScheme())) {
168 try {
169 Cursor cursor = mXmppConnectionService
170 .getContentResolver()
171 .query(image,
172 new String[] { MediaStore.Images.ImageColumns.ORIENTATION },
173 null, null, null);
174 if (cursor.getCount() != 1) {
175 return -1;
176 }
177 cursor.moveToFirst();
178 return cursor.getInt(0);
179 } catch (IllegalArgumentException e) {
180 return -1;
181 }
182 } else {
183 try {
184 InputStream is = mXmppConnectionService.getContentResolver()
185 .openInputStream(image);
186 return ExifHelper.getOrientation(is);
187 } catch (FileNotFoundException e) {
188 return 0;
189 }
190 }
191 }
192
193 public Bitmap getImageFromMessage(Message message) {
194 return BitmapFactory.decodeFile(getFile(message).getAbsolutePath());
195 }
196
197 public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
198 throws FileNotFoundException {
199 Bitmap thumbnail = mXmppConnectionService.getBitmapCache().get(
200 message.getUuid());
201 if ((thumbnail == null) && (!cacheOnly)) {
202 File file = getFile(message);
203 BitmapFactory.Options options = new BitmapFactory.Options();
204 options.inSampleSize = calcSampleSize(file, size);
205 Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),
206 options);
207 if (fullsize == null) {
208 throw new FileNotFoundException();
209 }
210 thumbnail = resize(fullsize, size);
211 this.mXmppConnectionService.getBitmapCache().put(message.getUuid(),
212 thumbnail);
213 }
214 return thumbnail;
215 }
216
217 public Uri getTakePhotoUri() {
218 StringBuilder pathBuilder = new StringBuilder();
219 pathBuilder.append(Environment
220 .getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
221 pathBuilder.append('/');
222 pathBuilder.append("Camera");
223 pathBuilder.append('/');
224 pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date())
225 + ".jpg");
226 Uri uri = Uri.parse("file://" + pathBuilder.toString());
227 File file = new File(uri.toString());
228 file.getParentFile().mkdirs();
229 return uri;
230 }
231
232 public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
233 try {
234 Avatar avatar = new Avatar();
235 Bitmap bm = cropCenterSquare(image, size);
236 if (bm == null) {
237 return null;
238 }
239 ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
240 Base64OutputStream mBase64OutputSttream = new Base64OutputStream(
241 mByteArrayOutputStream, Base64.DEFAULT);
242 MessageDigest digest = MessageDigest.getInstance("SHA-1");
243 DigestOutputStream mDigestOutputStream = new DigestOutputStream(
244 mBase64OutputSttream, digest);
245 if (!bm.compress(format, 75, mDigestOutputStream)) {
246 return null;
247 }
248 mDigestOutputStream.flush();
249 mDigestOutputStream.close();
250 avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
251 avatar.image = new String(mByteArrayOutputStream.toByteArray());
252 return avatar;
253 } catch (NoSuchAlgorithmException e) {
254 return null;
255 } catch (IOException e) {
256 return null;
257 }
258 }
259
260 public boolean isAvatarCached(Avatar avatar) {
261 File file = new File(getAvatarPath(avatar.getFilename()));
262 return file.exists();
263 }
264
265 public boolean save(Avatar avatar) {
266 if (isAvatarCached(avatar)) {
267 return true;
268 }
269 String filename = getAvatarPath(avatar.getFilename());
270 File file = new File(filename + ".tmp");
271 file.getParentFile().mkdirs();
272 try {
273 file.createNewFile();
274 FileOutputStream mFileOutputStream = new FileOutputStream(file);
275 MessageDigest digest = MessageDigest.getInstance("SHA-1");
276 digest.reset();
277 DigestOutputStream mDigestOutputStream = new DigestOutputStream(
278 mFileOutputStream, digest);
279 mDigestOutputStream.write(avatar.getImageAsBytes());
280 mDigestOutputStream.flush();
281 mDigestOutputStream.close();
282 avatar.size = file.length();
283 String sha1sum = CryptoHelper.bytesToHex(digest.digest());
284 if (sha1sum.equals(avatar.sha1sum)) {
285 file.renameTo(new File(filename));
286 return true;
287 } else {
288 Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
289 file.delete();
290 return false;
291 }
292 } catch (FileNotFoundException e) {
293 return false;
294 } catch (IOException e) {
295 return false;
296 } catch (NoSuchAlgorithmException e) {
297 return false;
298 }
299 }
300
301 public String getAvatarPath(String avatar) {
302 return mXmppConnectionService.getFilesDir().getAbsolutePath()
303 + "/avatars/" + avatar;
304 }
305
306 public Uri getAvatarUri(String avatar) {
307 return Uri.parse("file:" + getAvatarPath(avatar));
308 }
309
310 public Bitmap cropCenterSquare(Uri image, int size) {
311 try {
312 BitmapFactory.Options options = new BitmapFactory.Options();
313 options.inSampleSize = calcSampleSize(image, size);
314 InputStream is = mXmppConnectionService.getContentResolver()
315 .openInputStream(image);
316 Bitmap input = BitmapFactory.decodeStream(is, null, options);
317 if (input == null) {
318 return null;
319 } else {
320 int rotation = getRotation(image);
321 if (rotation > 0) {
322 input = rotate(input, rotation);
323 }
324 return cropCenterSquare(input, size);
325 }
326 } catch (FileNotFoundException e) {
327 return null;
328 }
329 }
330
331 public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
332 try {
333 BitmapFactory.Options options = new BitmapFactory.Options();
334 options.inSampleSize = calcSampleSize(image,
335 Math.max(newHeight, newWidth));
336 InputStream is = mXmppConnectionService.getContentResolver()
337 .openInputStream(image);
338 Bitmap source = BitmapFactory.decodeStream(is, null, options);
339
340 int sourceWidth = source.getWidth();
341 int sourceHeight = source.getHeight();
342 float xScale = (float) newWidth / sourceWidth;
343 float yScale = (float) newHeight / sourceHeight;
344 float scale = Math.max(xScale, yScale);
345 float scaledWidth = scale * sourceWidth;
346 float scaledHeight = scale * sourceHeight;
347 float left = (newWidth - scaledWidth) / 2;
348 float top = (newHeight - scaledHeight) / 2;
349
350 RectF targetRect = new RectF(left, top, left + scaledWidth, top
351 + scaledHeight);
352 Bitmap dest = Bitmap.createBitmap(newWidth, newHeight,
353 source.getConfig());
354 Canvas canvas = new Canvas(dest);
355 canvas.drawBitmap(source, null, targetRect, null);
356
357 return dest;
358 } catch (FileNotFoundException e) {
359 return null;
360 }
361
362 }
363
364 public Bitmap cropCenterSquare(Bitmap input, int size) {
365 int w = input.getWidth();
366 int h = input.getHeight();
367
368 float scale = Math.max((float) size / h, (float) size / w);
369
370 float outWidth = scale * w;
371 float outHeight = scale * h;
372 float left = (size - outWidth) / 2;
373 float top = (size - outHeight) / 2;
374 RectF target = new RectF(left, top, left + outWidth, top + outHeight);
375
376 Bitmap output = Bitmap.createBitmap(size, size, input.getConfig());
377 Canvas canvas = new Canvas(output);
378 canvas.drawBitmap(input, null, target, null);
379 return output;
380 }
381
382 private int calcSampleSize(Uri image, int size)
383 throws FileNotFoundException {
384 BitmapFactory.Options options = new BitmapFactory.Options();
385 options.inJustDecodeBounds = true;
386 BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver()
387 .openInputStream(image), null, options);
388 return calcSampleSize(options, size);
389 }
390
391 private int calcSampleSize(File image, int size) {
392 BitmapFactory.Options options = new BitmapFactory.Options();
393 options.inJustDecodeBounds = true;
394 BitmapFactory.decodeFile(image.getAbsolutePath(), options);
395 return calcSampleSize(options, size);
396 }
397
398 private int calcSampleSize(BitmapFactory.Options options, int size) {
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 public Uri getJingleFileUri(Message message) {
416 File file = getFile(message);
417 return Uri.parse("file://" + file.getAbsolutePath());
418 }
419
420 public class ImageCopyException extends Exception {
421 private static final long serialVersionUID = -1010013599132881427L;
422 private int resId;
423
424 public ImageCopyException(int resId) {
425 this.resId = resId;
426 }
427
428 public int getResId() {
429 return resId;
430 }
431 }
432
433 public Bitmap getAvatar(String avatar, int size) {
434 if (avatar == null) {
435 return null;
436 }
437 Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
438 if (bm == null) {
439 return null;
440 }
441 return bm;
442 }
443
444 public boolean isFileAvailable(Message message) {
445 return getFile(message).exists();
446 }
447}