Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Google Inc. |
| 3 | * Licensed to The Android Open Source Project. |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | package com.android.mail.providers; |
| 19 | |
| 20 | import android.app.DownloadManager; |
| 21 | import android.content.ContentProvider; |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 22 | import android.content.ContentResolver; |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 23 | import android.content.ContentValues; |
| 24 | import android.content.Context; |
| 25 | import android.content.Intent; |
| 26 | import android.content.UriMatcher; |
| 27 | import android.database.Cursor; |
| 28 | import android.database.MatrixCursor; |
| 29 | import android.net.Uri; |
| 30 | import android.os.Environment; |
| 31 | import android.os.ParcelFileDescriptor; |
| 32 | import android.os.SystemClock; |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 33 | import android.text.TextUtils; |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 34 | |
| 35 | import com.android.ex.photo.provider.PhotoContract; |
| 36 | import com.android.mail.R; |
| 37 | import com.android.mail.utils.LogTag; |
| 38 | import com.android.mail.utils.LogUtils; |
Andrew Sapperstein | 1317896 | 2013-06-24 14:10:38 -0700 | [diff] [blame] | 39 | import com.android.mail.utils.MimeType; |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 40 | import com.google.common.collect.Lists; |
| 41 | import com.google.common.collect.Maps; |
| 42 | |
| 43 | import java.io.File; |
| 44 | import java.io.FileInputStream; |
| 45 | import java.io.FileNotFoundException; |
| 46 | import java.io.FileOutputStream; |
| 47 | import java.io.IOException; |
| 48 | import java.io.InputStream; |
| 49 | import java.io.OutputStream; |
| 50 | import java.util.List; |
| 51 | import java.util.Map; |
| 52 | |
| 53 | /** |
| 54 | * A {@link ContentProvider} for attachments created from eml files. |
| 55 | * Supports all of the semantics (query/insert/update/delete/openFile) |
| 56 | * of the regular attachment provider. |
| 57 | * |
| 58 | * One major difference is that all attachment info is stored in memory (with the |
| 59 | * exception of the attachment raw data which is stored in the cache). When |
| 60 | * the process is killed, all of the attachments disappear if they still |
| 61 | * exist. |
| 62 | */ |
| 63 | public class EmlAttachmentProvider extends ContentProvider { |
| 64 | private static final String LOG_TAG = LogTag.getLogTag(); |
| 65 | |
| 66 | private static final UriMatcher sUriMatcher = new UriMatcher(UriMatcher.NO_MATCH); |
| 67 | private static boolean sUrisAddedToMatcher = false; |
| 68 | |
| 69 | private static final int ATTACHMENT_LIST = 0; |
| 70 | private static final int ATTACHMENT = 1; |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 71 | private static final int ATTACHMENT_BY_CID = 2; |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 72 | |
| 73 | /** |
| 74 | * The buffer size used to copy data from cache to sd card. |
| 75 | */ |
| 76 | private static final int BUFFER_SIZE = 4096; |
| 77 | |
| 78 | /** Any IO reads should be limited to this timeout */ |
| 79 | private static final long READ_TIMEOUT = 3600 * 1000; |
| 80 | |
| 81 | private static Uri BASE_URI; |
| 82 | |
| 83 | private DownloadManager mDownloadManager; |
| 84 | |
| 85 | /** |
| 86 | * Map that contains a mapping from an attachment list uri to a list of uris. |
| 87 | */ |
| 88 | private Map<Uri, List<Uri>> mUriListMap; |
| 89 | |
| 90 | /** |
| 91 | * Map that contains a mapping from an attachment uri to an {@link Attachment} object. |
| 92 | */ |
| 93 | private Map<Uri, Attachment> mUriAttachmentMap; |
| 94 | |
| 95 | |
| 96 | @Override |
| 97 | public boolean onCreate() { |
| 98 | final String authority = |
| 99 | getContext().getResources().getString(R.string.eml_attachment_provider); |
| 100 | BASE_URI = new Uri.Builder().scheme("content").authority(authority).build(); |
| 101 | |
| 102 | if (!sUrisAddedToMatcher) { |
| 103 | sUrisAddedToMatcher = true; |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 104 | sUriMatcher.addURI(authority, "attachments/*/*", ATTACHMENT_LIST); |
| 105 | sUriMatcher.addURI(authority, "attachment/*/*/#", ATTACHMENT); |
| 106 | sUriMatcher.addURI(authority, "attachmentByCid/*/*/*", ATTACHMENT_BY_CID); |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | mDownloadManager = |
| 110 | (DownloadManager) getContext().getSystemService(Context.DOWNLOAD_SERVICE); |
| 111 | |
| 112 | mUriListMap = Maps.newHashMap(); |
| 113 | mUriAttachmentMap = Maps.newHashMap(); |
| 114 | return true; |
| 115 | } |
| 116 | |
| 117 | @Override |
| 118 | public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, |
| 119 | String sortOrder) { |
| 120 | final int match = sUriMatcher.match(uri); |
| 121 | // ignore other projections |
| 122 | final MatrixCursor cursor = new MatrixCursor(UIProvider.ATTACHMENT_PROJECTION); |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 123 | final ContentResolver cr = getContext().getContentResolver(); |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 124 | |
| 125 | switch (match) { |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 126 | case ATTACHMENT_LIST: { |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 127 | final List<String> contentTypeQueryParameters = |
| 128 | uri.getQueryParameters(PhotoContract.ContentTypeParameters.CONTENT_TYPE); |
| 129 | uri = uri.buildUpon().clearQuery().build(); |
| 130 | final List<Uri> attachmentUris = mUriListMap.get(uri); |
| 131 | for (final Uri attachmentUri : attachmentUris) { |
| 132 | addRow(cursor, attachmentUri, contentTypeQueryParameters); |
| 133 | } |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 134 | cursor.setNotificationUri(cr, uri); |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 135 | break; |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 136 | } |
| 137 | case ATTACHMENT: { |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 138 | addRow(cursor, mUriAttachmentMap.get(uri)); |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 139 | cursor.setNotificationUri(cr, getListUriFromAttachmentUri(uri)); |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 140 | break; |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 141 | } |
| 142 | case ATTACHMENT_BY_CID: { |
| 143 | // form the attachment lists uri by clipping off the cid from the given uri |
| 144 | final Uri attachmentsListUri = getListUriFromAttachmentUri(uri); |
| 145 | final String cid = uri.getPathSegments().get(3); |
| 146 | |
| 147 | // find all uris for the parent message |
| 148 | final List<Uri> attachmentUris = mUriListMap.get(attachmentsListUri); |
| 149 | |
| 150 | if (attachmentUris != null) { |
| 151 | // find the attachment that contains the given cid |
| 152 | for (Uri attachmentsUri : attachmentUris) { |
| 153 | final Attachment attachment = mUriAttachmentMap.get(attachmentsUri); |
| 154 | if (TextUtils.equals(cid, attachment.partId)) { |
| 155 | addRow(cursor, attachment); |
| 156 | cursor.setNotificationUri(cr, attachmentsListUri); |
| 157 | break; |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | break; |
| 162 | } |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 163 | default: |
| 164 | break; |
| 165 | } |
| 166 | |
| 167 | return cursor; |
| 168 | } |
| 169 | |
| 170 | @Override |
| 171 | public String getType(Uri uri) { |
| 172 | final int match = sUriMatcher.match(uri); |
| 173 | switch (match) { |
| 174 | case ATTACHMENT: |
| 175 | return mUriAttachmentMap.get(uri).getContentType(); |
| 176 | default: |
| 177 | return null; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | @Override |
| 182 | public Uri insert(Uri uri, ContentValues values) { |
| 183 | final Uri listUri = getListUriFromAttachmentUri(uri); |
| 184 | |
| 185 | // add mapping from uri to attachment |
| 186 | if (mUriAttachmentMap.put(uri, new Attachment(values)) == null) { |
| 187 | // only add uri to list if the list |
| 188 | // get list of attachment uris, creating if necessary |
| 189 | List<Uri> list = mUriListMap.get(listUri); |
| 190 | if (list == null) { |
| 191 | list = Lists.newArrayList(); |
| 192 | mUriListMap.put(listUri, list); |
| 193 | } |
| 194 | |
| 195 | list.add(uri); |
| 196 | } |
| 197 | |
| 198 | return uri; |
| 199 | } |
| 200 | |
| 201 | @Override |
| 202 | public int delete(Uri uri, String selection, String[] selectionArgs) { |
| 203 | final int match = sUriMatcher.match(uri); |
| 204 | switch (match) { |
| 205 | case ATTACHMENT_LIST: |
| 206 | // remove from list mapping |
| 207 | final List<Uri> attachmentUris = mUriListMap.remove(uri); |
| 208 | |
| 209 | // delete each file and remove each element from the mapping |
| 210 | for (final Uri attachmentUri : attachmentUris) { |
| 211 | mUriAttachmentMap.remove(attachmentUri); |
| 212 | } |
| 213 | |
| 214 | deleteDirectory(getCacheFileDirectory(uri)); |
| 215 | // return rows affected |
| 216 | return attachmentUris.size(); |
| 217 | default: |
| 218 | return 0; |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | @Override |
| 223 | public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { |
| 224 | final int match = sUriMatcher.match(uri); |
| 225 | switch (match) { |
| 226 | case ATTACHMENT: |
| 227 | return copyAttachment(uri, values); |
| 228 | default: |
| 229 | return 0; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * Adds a row to the cursor for the attachment at the specific attachment {@link Uri} |
| 235 | * if the attachment's mime type matches one of the query parameters. |
| 236 | * |
| 237 | * Matching is defined to be starting with one of the query parameters. If no |
| 238 | * parameters exist, all rows are added. |
| 239 | */ |
| 240 | private void addRow(MatrixCursor cursor, Uri uri, |
| 241 | List<String> contentTypeQueryParameters) { |
| 242 | final Attachment attachment = mUriAttachmentMap.get(uri); |
| 243 | |
| 244 | if (contentTypeQueryParameters != null && !contentTypeQueryParameters.isEmpty()) { |
| 245 | for (final String type : contentTypeQueryParameters) { |
| 246 | if (attachment.getContentType().startsWith(type)) { |
| 247 | addRow(cursor, attachment); |
| 248 | return; |
| 249 | } |
| 250 | } |
| 251 | } else { |
| 252 | addRow(cursor, attachment); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Adds a new row to the cursor for the specific attachment. |
| 258 | */ |
Scott Kennedy | 3b965d7 | 2013-06-25 14:36:55 -0700 | [diff] [blame] | 259 | private static void addRow(MatrixCursor cursor, Attachment attachment) { |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 260 | cursor.newRow() |
| 261 | .add(attachment.getName()) // displayName |
| 262 | .add(attachment.size) // size |
| 263 | .add(attachment.uri) // uri |
| 264 | .add(attachment.getContentType()) // contentType |
| 265 | .add(attachment.state) // state |
| 266 | .add(attachment.destination) // destination |
| 267 | .add(attachment.downloadedSize) // downloadedSize |
| 268 | .add(attachment.contentUri) // contentUri |
| 269 | .add(attachment.thumbnailUri) // thumbnailUri |
| 270 | .add(attachment.previewIntentUri) // previewIntentUri |
| 271 | .add(attachment.providerData) // providerData |
Andrew Sapperstein | e307785 | 2013-12-11 18:04:25 -0800 | [diff] [blame] | 272 | .add(attachment.supportsDownloadAgain() ? 1 : 0) // supportsDownloadAgain |
| 273 | .add(attachment.type) // type |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 274 | .add(attachment.flags) // flags |
| 275 | .add(attachment.partId); // partId (same as RFC822 cid) |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Copies an attachment at the specified {@link Uri} |
| 280 | * from cache to the external downloads directory (usually the sd card). |
| 281 | * @return the number of attachments affected. Should be 1 or 0. |
| 282 | */ |
| 283 | private int copyAttachment(Uri uri, ContentValues values) { |
| 284 | final Integer newState = values.getAsInteger(UIProvider.AttachmentColumns.STATE); |
| 285 | final Integer newDestination = |
| 286 | values.getAsInteger(UIProvider.AttachmentColumns.DESTINATION); |
| 287 | if (newState == null && newDestination == null) { |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | final int destination = newDestination != null ? |
| 292 | newDestination.intValue() : UIProvider.AttachmentDestination.CACHE; |
| 293 | final boolean saveToSd = |
| 294 | destination == UIProvider.AttachmentDestination.EXTERNAL; |
| 295 | |
| 296 | final Attachment attachment = mUriAttachmentMap.get(uri); |
| 297 | |
| 298 | // 1. check if already saved to sd (via uri save to sd) |
| 299 | // and return if so (we shouldn't ever be here) |
| 300 | |
| 301 | // if the call was not to save to sd or already saved to sd, just bail out |
| 302 | if (!saveToSd || attachment.isSavedToExternal()) { |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | |
| 307 | // 2. copy file |
| 308 | final String oldFilePath = getFilePath(uri); |
| 309 | |
| 310 | // update the destination before getting the new file path |
| 311 | // otherwise it will just point to the old location. |
| 312 | attachment.destination = UIProvider.AttachmentDestination.EXTERNAL; |
| 313 | final String newFilePath = getFilePath(uri); |
| 314 | |
| 315 | InputStream inputStream = null; |
| 316 | OutputStream outputStream = null; |
| 317 | |
| 318 | try { |
| 319 | try { |
| 320 | inputStream = new FileInputStream(oldFilePath); |
| 321 | } catch (FileNotFoundException e) { |
| 322 | LogUtils.e(LOG_TAG, "File not found for file %s", oldFilePath); |
| 323 | return 0; |
| 324 | } |
| 325 | try { |
| 326 | outputStream = new FileOutputStream(newFilePath); |
| 327 | } catch (FileNotFoundException e) { |
| 328 | LogUtils.e(LOG_TAG, "File not found for file %s", newFilePath); |
| 329 | return 0; |
| 330 | } |
| 331 | try { |
| 332 | final long now = SystemClock.elapsedRealtime(); |
| 333 | final byte data[] = new byte[BUFFER_SIZE]; |
| 334 | int size = 0; |
| 335 | while (true) { |
| 336 | final int len = inputStream.read(data); |
| 337 | if (len != -1) { |
| 338 | outputStream.write(data, 0, len); |
| 339 | |
| 340 | size += len; |
| 341 | } else { |
| 342 | break; |
| 343 | } |
| 344 | if (SystemClock.elapsedRealtime() - now > READ_TIMEOUT) { |
| 345 | throw new IOException("Timed out copying attachment."); |
| 346 | } |
| 347 | } |
| 348 | |
Andrew Sapperstein | 1317896 | 2013-06-24 14:10:38 -0700 | [diff] [blame] | 349 | // if the attachment is an APK, change contentUri to be a direct file uri |
| 350 | if (MimeType.isInstallable(attachment.getContentType())) { |
| 351 | attachment.contentUri = Uri.parse("file://" + newFilePath); |
| 352 | } |
| 353 | |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 354 | // 3. add file to download manager |
| 355 | |
| 356 | try { |
| 357 | // TODO - make a better description |
| 358 | final String description = attachment.getName(); |
| 359 | mDownloadManager.addCompletedDownload(attachment.getName(), |
| 360 | description, true, attachment.getContentType(), |
| 361 | newFilePath, size, false); |
| 362 | } |
| 363 | catch (IllegalArgumentException e) { |
| 364 | // Even if we cannot save the download to the downloads app, |
| 365 | // (likely due to a bad mimeType), we still want to save it. |
| 366 | LogUtils.e(LOG_TAG, e, "Failed to save download to Downloads app."); |
| 367 | } |
| 368 | final Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE); |
| 369 | intent.setData(Uri.parse("file://" + newFilePath)); |
| 370 | getContext().sendBroadcast(intent); |
| 371 | |
| 372 | // 4. delete old file |
| 373 | new File(oldFilePath).delete(); |
| 374 | } catch (IOException e) { |
| 375 | // Error writing file, delete partial file |
| 376 | LogUtils.e(LOG_TAG, e, "Cannot write to file %s", newFilePath); |
| 377 | new File(newFilePath).delete(); |
| 378 | } |
| 379 | } finally { |
| 380 | try { |
| 381 | if (inputStream != null) { |
| 382 | inputStream.close(); |
| 383 | } |
| 384 | } catch (IOException e) { |
| 385 | } |
| 386 | try { |
| 387 | if (outputStream != null) { |
| 388 | outputStream.close(); |
| 389 | } |
| 390 | } catch (IOException e) { |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | // 5. notify that the list of attachments has changed so the UI will update |
| 395 | getContext().getContentResolver().notifyChange( |
| 396 | getListUriFromAttachmentUri(uri), null, false); |
| 397 | return 1; |
| 398 | } |
| 399 | |
| 400 | @Override |
| 401 | public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException { |
| 402 | final String filePath = getFilePath(uri); |
| 403 | |
| 404 | final int fileMode; |
| 405 | |
| 406 | if ("rwt".equals(mode)) { |
| 407 | fileMode = ParcelFileDescriptor.MODE_READ_WRITE | |
| 408 | ParcelFileDescriptor.MODE_TRUNCATE | |
| 409 | ParcelFileDescriptor.MODE_CREATE; |
| 410 | } else if ("rw".equals(mode)) { |
| 411 | fileMode = ParcelFileDescriptor.MODE_READ_WRITE | ParcelFileDescriptor.MODE_CREATE; |
| 412 | } else { |
| 413 | fileMode = ParcelFileDescriptor.MODE_READ_ONLY; |
| 414 | } |
| 415 | |
| 416 | return ParcelFileDescriptor.open(new File(filePath), fileMode); |
| 417 | } |
| 418 | |
| 419 | /** |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 420 | * Returns an attachment list uri for the specific attachment uri passed. |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 421 | */ |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 422 | private static Uri getListUriFromAttachmentUri(Uri uri) { |
| 423 | final List<String> segments = uri.getPathSegments(); |
| 424 | return BASE_URI.buildUpon() |
| 425 | .appendPath("attachments") |
| 426 | .appendPath(segments.get(1)) |
| 427 | .appendPath(segments.get(2)) |
| 428 | .build(); |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | /** |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 432 | * Returns an attachment list uri for an eml file at the given uri with the given message id. |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 433 | */ |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 434 | public static Uri getAttachmentsListUri(Uri emlFileUri, String messageId) { |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 435 | return BASE_URI.buildUpon() |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 436 | .appendPath("attachments") |
| 437 | .appendPath(Integer.toString(emlFileUri.hashCode())) |
| 438 | .appendPath(messageId) |
| 439 | .build(); |
| 440 | } |
| 441 | |
| 442 | /** |
| 443 | * Returns an attachment uri for an eml file at the given uri with the given message id. |
| 444 | * The consumer of this uri must append a specific CID to it to complete the uri. |
| 445 | */ |
| 446 | public static Uri getAttachmentByCidUri(Uri emlFileUri, String messageId) { |
| 447 | return BASE_URI.buildUpon() |
| 448 | .appendPath("attachmentByCid") |
| 449 | .appendPath(Integer.toString(emlFileUri.hashCode())) |
| 450 | .appendPath(messageId) |
| 451 | .build(); |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | /** |
| 455 | * Returns an attachment uri for an attachment from the given eml file uri with |
| 456 | * the given message id and part id. |
| 457 | */ |
| 458 | public static Uri getAttachmentUri(Uri emlFileUri, String messageId, String partId) { |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 459 | return BASE_URI.buildUpon() |
| 460 | .appendPath("attachment") |
| 461 | .appendPath(Integer.toString(emlFileUri.hashCode())) |
| 462 | .appendPath(messageId) |
| 463 | .appendPath(partId) |
| 464 | .build(); |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 465 | } |
| 466 | |
| 467 | /** |
| 468 | * Returns the absolute file path for the attachment at the given uri. |
| 469 | */ |
| 470 | private String getFilePath(Uri uri) { |
| 471 | final Attachment attachment = mUriAttachmentMap.get(uri); |
| 472 | final boolean saveToSd = |
| 473 | attachment.destination == UIProvider.AttachmentDestination.EXTERNAL; |
| 474 | final String pathStart = (saveToSd) ? |
| 475 | Environment.getExternalStoragePublicDirectory( |
| 476 | Environment.DIRECTORY_DOWNLOADS).getAbsolutePath() : getCacheDir(); |
| 477 | |
| 478 | // we want the root of the downloads directory if the attachment is |
| 479 | // saved to external (or we're saving to external) |
| 480 | final String directoryPath = (saveToSd) ? pathStart : pathStart + uri.getEncodedPath(); |
| 481 | |
| 482 | final File directory = new File(directoryPath); |
| 483 | if (!directory.exists()) { |
| 484 | directory.mkdirs(); |
| 485 | } |
| 486 | return directoryPath + "/" + attachment.getName(); |
| 487 | } |
| 488 | |
| 489 | /** |
| 490 | * Returns the root directory for the attachments for the specific uri. |
| 491 | */ |
| 492 | private String getCacheFileDirectory(Uri uri) { |
James Lemieux | 934b1f4 | 2014-04-09 12:59:29 -0700 | [diff] [blame] | 493 | return getCacheDir() + "/" + Uri.encode(uri.getPathSegments().get(1)); |
Andrew Sapperstein | 7434e80 | 2013-06-21 11:26:49 -0700 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | /** |
| 497 | * Returns the cache directory for eml attachment files. |
| 498 | */ |
| 499 | private String getCacheDir() { |
| 500 | return getContext().getCacheDir().getAbsolutePath().concat("/eml"); |
| 501 | } |
| 502 | |
| 503 | /** |
| 504 | * Recursively delete the directory at the passed file path. |
| 505 | */ |
| 506 | private void deleteDirectory(String cacheFileDirectory) { |
| 507 | recursiveDelete(new File(cacheFileDirectory)); |
| 508 | } |
| 509 | |
| 510 | /** |
| 511 | * Recursively deletes a file or directory. |
| 512 | */ |
| 513 | private void recursiveDelete(File file) { |
| 514 | if (file.isDirectory()) { |
| 515 | final File[] children = file.listFiles(); |
| 516 | for (final File child : children) { |
| 517 | recursiveDelete(child); |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | file.delete(); |
| 522 | } |
| 523 | } |