1package eu.siacs.conversations.persistance;
2
3import java.io.ByteArrayOutputStream;
4import java.io.File;
5import java.io.FileInputStream;
6import java.io.FileNotFoundException;
7import java.io.FileOutputStream;
8import java.io.IOException;
9import java.io.InputStream;
10import java.io.OutputStream;
11import java.net.URLConnection;
12import java.security.DigestOutputStream;
13import java.security.MessageDigest;
14import java.security.NoSuchAlgorithmException;
15import java.text.SimpleDateFormat;
16import java.util.Date;
17import java.util.Locale;
18
19import android.content.ContentResolver;
20import android.database.Cursor;
21import android.graphics.Bitmap;
22import android.graphics.BitmapFactory;
23import android.graphics.Canvas;
24import android.graphics.Matrix;
25import android.graphics.RectF;
26import android.net.Uri;
27import android.os.Environment;
28import android.provider.MediaStore;
29import android.util.Base64;
30import android.util.Base64OutputStream;
31import android.util.Log;
32import eu.siacs.conversations.Config;
33import eu.siacs.conversations.R;
34import eu.siacs.conversations.entities.DownloadableFile;
35import eu.siacs.conversations.entities.Message;
36import eu.siacs.conversations.services.XmppConnectionService;
37import eu.siacs.conversations.utils.CryptoHelper;
38import eu.siacs.conversations.utils.ExifHelper;
39import eu.siacs.conversations.xmpp.pep.Avatar;
40
41public class FileBackend {
42
43 private static int IMAGE_SIZE = 1920;
44
45 private SimpleDateFormat imageDateFormat = new SimpleDateFormat(
46 "yyyyMMdd_HHmmssSSS", Locale.US);
47
48 private XmppConnectionService mXmppConnectionService;
49
50 public FileBackend(XmppConnectionService service) {
51 this.mXmppConnectionService = service;
52 }
53
54 public DownloadableFile getFile(Message message) {
55 return getFile(message, true);
56 }
57
58 public DownloadableFile getFile(Message message, boolean decrypted) {
59 String path = message.getRelativeFilePath();
60 if (path != null && !path.isEmpty()) {
61 if (path.startsWith("/")) {
62 return new DownloadableFile(path);
63 } else {
64 return new DownloadableFile(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)+"/"+path);
65 }
66 } else {
67 StringBuilder filename = new StringBuilder();
68 filename.append(getConversationsDirectory());
69 filename.append(message.getUuid());
70 if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
71 filename.append(".webp");
72 } else {
73 if (message.getEncryption() == Message.ENCRYPTION_OTR) {
74 filename.append(".webp");
75 } else {
76 filename.append(".webp.pgp");
77 }
78 }
79 return new DownloadableFile(filename.toString());
80 }
81 }
82
83 public static String getConversationsDirectory() {
84 return Environment.getExternalStoragePublicDirectory(
85 Environment.DIRECTORY_PICTURES).getAbsolutePath()
86 + "/Conversations/";
87 }
88
89 public Bitmap resize(Bitmap originalBitmap, int size) {
90 int w = originalBitmap.getWidth();
91 int h = originalBitmap.getHeight();
92 if (Math.max(w, h) > size) {
93 int scalledW;
94 int scalledH;
95 if (w <= h) {
96 scalledW = (int) (w / ((double) h / size));
97 scalledH = size;
98 } else {
99 scalledW = size;
100 scalledH = (int) (h / ((double) w / size));
101 }
102 Bitmap scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
103 scalledW, scalledH, true);
104 return scalledBitmap;
105 } else {
106 return originalBitmap;
107 }
108 }
109
110 public Bitmap rotate(Bitmap bitmap, int degree) {
111 int w = bitmap.getWidth();
112 int h = bitmap.getHeight();
113 Matrix mtx = new Matrix();
114 mtx.postRotate(degree);
115 return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
116 }
117
118 public String getOriginalPath(Uri uri) {
119 String path = null;
120 if (uri.getScheme().equals("file")) {
121 path = uri.getPath();
122 } else {
123 String[] projection = {MediaStore.MediaColumns.DATA};
124 Cursor metaCursor = mXmppConnectionService.getContentResolver().query(uri,
125 projection, null, null, null);
126 if (metaCursor != null) {
127 try {
128 if (metaCursor.moveToFirst()) {
129 path = metaCursor.getString(0);
130 }
131 } finally {
132 metaCursor.close();
133 }
134 }
135 }
136 return path;
137 }
138
139 public DownloadableFile copyImageToPrivateStorage(Message message, Uri image)
140 throws FileCopyException {
141 return this.copyImageToPrivateStorage(message, image, 0);
142 }
143
144 private DownloadableFile copyImageToPrivateStorage(Message message,
145 Uri image, int sampleSize) throws FileCopyException {
146 try {
147 InputStream is = mXmppConnectionService.getContentResolver()
148 .openInputStream(image);
149 DownloadableFile file = getFile(message);
150 file.getParentFile().mkdirs();
151 file.createNewFile();
152 Bitmap originalBitmap;
153 BitmapFactory.Options options = new BitmapFactory.Options();
154 int inSampleSize = (int) Math.pow(2, sampleSize);
155 Log.d(Config.LOGTAG, "reading bitmap with sample size "
156 + inSampleSize);
157 options.inSampleSize = inSampleSize;
158 originalBitmap = BitmapFactory.decodeStream(is, null, options);
159 is.close();
160 if (originalBitmap == null) {
161 throw new FileCopyException(R.string.error_not_an_image_file);
162 }
163 Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
164 originalBitmap = null;
165 int rotation = getRotation(image);
166 if (rotation > 0) {
167 scalledBitmap = rotate(scalledBitmap, rotation);
168 }
169 OutputStream os = new FileOutputStream(file);
170 boolean success = scalledBitmap.compress(
171 Bitmap.CompressFormat.WEBP, 75, os);
172 if (!success) {
173 throw new FileCopyException(R.string.error_compressing_image);
174 }
175 os.flush();
176 os.close();
177 long size = file.getSize();
178 int width = scalledBitmap.getWidth();
179 int height = scalledBitmap.getHeight();
180 message.setBody(Long.toString(size) + ',' + width + ',' + height);
181 return file;
182 } catch (FileNotFoundException e) {
183 throw new FileCopyException(R.string.error_file_not_found);
184 } catch (IOException e) {
185 throw new FileCopyException(R.string.error_io_exception);
186 } catch (SecurityException e) {
187 throw new FileCopyException(
188 R.string.error_security_exception_during_image_copy);
189 } catch (OutOfMemoryError e) {
190 ++sampleSize;
191 if (sampleSize <= 3) {
192 return copyImageToPrivateStorage(message, image, sampleSize);
193 } else {
194 throw new FileCopyException(R.string.error_out_of_memory);
195 }
196 }
197 }
198
199 private int getRotation(Uri image) {
200 try {
201 InputStream is = mXmppConnectionService.getContentResolver()
202 .openInputStream(image);
203 return ExifHelper.getOrientation(is);
204 } catch (FileNotFoundException e) {
205 return 0;
206 }
207 }
208
209 public Bitmap getImageFromMessage(Message message) {
210 return BitmapFactory.decodeFile(getFile(message).getAbsolutePath());
211 }
212
213 public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
214 throws FileNotFoundException {
215 Bitmap thumbnail = mXmppConnectionService.getBitmapCache().get(
216 message.getUuid());
217 if ((thumbnail == null) && (!cacheOnly)) {
218 File file = getFile(message);
219 BitmapFactory.Options options = new BitmapFactory.Options();
220 options.inSampleSize = calcSampleSize(file, size);
221 Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),
222 options);
223 if (fullsize == null) {
224 throw new FileNotFoundException();
225 }
226 thumbnail = resize(fullsize, size);
227 this.mXmppConnectionService.getBitmapCache().put(message.getUuid(),
228 thumbnail);
229 }
230 return thumbnail;
231 }
232
233 public Uri getTakePhotoUri() {
234 StringBuilder pathBuilder = new StringBuilder();
235 pathBuilder.append(Environment
236 .getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
237 pathBuilder.append('/');
238 pathBuilder.append("Camera");
239 pathBuilder.append('/');
240 pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date())
241 + ".jpg");
242 Uri uri = Uri.parse("file://" + pathBuilder.toString());
243 File file = new File(uri.toString());
244 file.getParentFile().mkdirs();
245 return uri;
246 }
247
248 public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
249 try {
250 Avatar avatar = new Avatar();
251 Bitmap bm = cropCenterSquare(image, size);
252 if (bm == null) {
253 return null;
254 }
255 ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
256 Base64OutputStream mBase64OutputSttream = new Base64OutputStream(
257 mByteArrayOutputStream, Base64.DEFAULT);
258 MessageDigest digest = MessageDigest.getInstance("SHA-1");
259 DigestOutputStream mDigestOutputStream = new DigestOutputStream(
260 mBase64OutputSttream, digest);
261 if (!bm.compress(format, 75, mDigestOutputStream)) {
262 return null;
263 }
264 mDigestOutputStream.flush();
265 mDigestOutputStream.close();
266 avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
267 avatar.image = new String(mByteArrayOutputStream.toByteArray());
268 return avatar;
269 } catch (NoSuchAlgorithmException e) {
270 return null;
271 } catch (IOException e) {
272 return null;
273 }
274 }
275
276 public boolean isAvatarCached(Avatar avatar) {
277 File file = new File(getAvatarPath(avatar.getFilename()));
278 return file.exists();
279 }
280
281 public boolean save(Avatar avatar) {
282 if (isAvatarCached(avatar)) {
283 return true;
284 }
285 String filename = getAvatarPath(avatar.getFilename());
286 File file = new File(filename + ".tmp");
287 file.getParentFile().mkdirs();
288 try {
289 file.createNewFile();
290 FileOutputStream mFileOutputStream = new FileOutputStream(file);
291 MessageDigest digest = MessageDigest.getInstance("SHA-1");
292 digest.reset();
293 DigestOutputStream mDigestOutputStream = new DigestOutputStream(
294 mFileOutputStream, digest);
295 mDigestOutputStream.write(avatar.getImageAsBytes());
296 mDigestOutputStream.flush();
297 mDigestOutputStream.close();
298 avatar.size = file.length();
299 String sha1sum = CryptoHelper.bytesToHex(digest.digest());
300 if (sha1sum.equals(avatar.sha1sum)) {
301 file.renameTo(new File(filename));
302 return true;
303 } else {
304 Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
305 file.delete();
306 return false;
307 }
308 } catch (FileNotFoundException e) {
309 return false;
310 } catch (IOException e) {
311 return false;
312 } catch (NoSuchAlgorithmException e) {
313 return false;
314 }
315 }
316
317 public String getAvatarPath(String avatar) {
318 return mXmppConnectionService.getFilesDir().getAbsolutePath()
319 + "/avatars/" + avatar;
320 }
321
322 public Uri getAvatarUri(String avatar) {
323 return Uri.parse("file:" + getAvatarPath(avatar));
324 }
325
326 public Bitmap cropCenterSquare(Uri image, int size) {
327 try {
328 BitmapFactory.Options options = new BitmapFactory.Options();
329 options.inSampleSize = calcSampleSize(image, size);
330 InputStream is = mXmppConnectionService.getContentResolver()
331 .openInputStream(image);
332 Bitmap input = BitmapFactory.decodeStream(is, null, options);
333 if (input == null) {
334 return null;
335 } else {
336 int rotation = getRotation(image);
337 if (rotation > 0) {
338 input = rotate(input, rotation);
339 }
340 return cropCenterSquare(input, size);
341 }
342 } catch (FileNotFoundException e) {
343 return null;
344 }
345 }
346
347 public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
348 try {
349 BitmapFactory.Options options = new BitmapFactory.Options();
350 options.inSampleSize = calcSampleSize(image,
351 Math.max(newHeight, newWidth));
352 InputStream is = mXmppConnectionService.getContentResolver()
353 .openInputStream(image);
354 Bitmap source = BitmapFactory.decodeStream(is, null, options);
355
356 int sourceWidth = source.getWidth();
357 int sourceHeight = source.getHeight();
358 float xScale = (float) newWidth / sourceWidth;
359 float yScale = (float) newHeight / sourceHeight;
360 float scale = Math.max(xScale, yScale);
361 float scaledWidth = scale * sourceWidth;
362 float scaledHeight = scale * sourceHeight;
363 float left = (newWidth - scaledWidth) / 2;
364 float top = (newHeight - scaledHeight) / 2;
365
366 RectF targetRect = new RectF(left, top, left + scaledWidth, top
367 + scaledHeight);
368 Bitmap dest = Bitmap.createBitmap(newWidth, newHeight,
369 source.getConfig());
370 Canvas canvas = new Canvas(dest);
371 canvas.drawBitmap(source, null, targetRect, null);
372
373 return dest;
374 } catch (FileNotFoundException e) {
375 return null;
376 }
377
378 }
379
380 public Bitmap cropCenterSquare(Bitmap input, int size) {
381 int w = input.getWidth();
382 int h = input.getHeight();
383
384 float scale = Math.max((float) size / h, (float) size / w);
385
386 float outWidth = scale * w;
387 float outHeight = scale * h;
388 float left = (size - outWidth) / 2;
389 float top = (size - outHeight) / 2;
390 RectF target = new RectF(left, top, left + outWidth, top + outHeight);
391
392 Bitmap output = Bitmap.createBitmap(size, size, input.getConfig());
393 Canvas canvas = new Canvas(output);
394 canvas.drawBitmap(input, null, target, null);
395 return output;
396 }
397
398 private int calcSampleSize(Uri image, int size)
399 throws FileNotFoundException {
400 BitmapFactory.Options options = new BitmapFactory.Options();
401 options.inJustDecodeBounds = true;
402 BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver()
403 .openInputStream(image), null, options);
404 return calcSampleSize(options, size);
405 }
406
407 private int calcSampleSize(File image, int size) {
408 BitmapFactory.Options options = new BitmapFactory.Options();
409 options.inJustDecodeBounds = true;
410 BitmapFactory.decodeFile(image.getAbsolutePath(), options);
411 return calcSampleSize(options, size);
412 }
413
414 private int calcSampleSize(BitmapFactory.Options options, int size) {
415 int height = options.outHeight;
416 int width = options.outWidth;
417 int inSampleSize = 1;
418
419 if (height > size || width > size) {
420 int halfHeight = height / 2;
421 int halfWidth = width / 2;
422
423 while ((halfHeight / inSampleSize) > size
424 && (halfWidth / inSampleSize) > size) {
425 inSampleSize *= 2;
426 }
427 }
428 return inSampleSize;
429 }
430
431 public Uri getJingleFileUri(Message message) {
432 File file = getFile(message);
433 return Uri.parse("file://" + file.getAbsolutePath());
434 }
435
436 public class FileCopyException extends Exception {
437 private static final long serialVersionUID = -1010013599132881427L;
438 private int resId;
439
440 public FileCopyException(int resId) {
441 this.resId = resId;
442 }
443
444 public int getResId() {
445 return resId;
446 }
447 }
448
449 public Bitmap getAvatar(String avatar, int size) {
450 if (avatar == null) {
451 return null;
452 }
453 Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
454 if (bm == null) {
455 return null;
456 }
457 return bm;
458 }
459
460 public boolean isFileAvailable(Message message) {
461 return getFile(message).exists();
462 }
463}