src/com/owncloud/android/ui/activity/FileActivity.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package com.owncloud.android.ui.activity;
  20
  21 import android.accounts.Account;
  22 import android.accounts.AccountManager;
  23 import android.accounts.AccountManagerCallback;
  24 import android.accounts.AccountManagerFuture;
  25 import android.accounts.OperationCanceledException;
  26 import android.content.Intent;
  27 import android.net.Uri;
  28 import android.os.Bundle;
  29 import android.webkit.MimeTypeMap;
  30
  31 import com.actionbarsherlock.app.SherlockFragmentActivity;
  32 import com.owncloud.android.MainApp;
  33 import com.owncloud.android.R;
  34 import com.owncloud.android.authentication.AccountUtils;
  35 import com.owncloud.android.datamodel.OCFile;
  36
  37 import com.owncloud.android.lib.accounts.OwnCloudAccount;
  38 import com.owncloud.android.lib.network.webdav.WebdavUtils;
  39
  40 import com.owncloud.android.utils.Log_OC;
  41
  42
  43 /**
  44  * Activity with common behaviour for activities handling {@link OCFile}s in ownCloud {@link Account}s .
  45  *
  46  * @author David A. Velasco
  47  */
  48 public abstract class FileActivity extends SherlockFragmentActivity {
  49
  50     public static final String EXTRA_FILE = "com.owncloud.android.ui.activity.FILE";
  51     public static final String EXTRA_ACCOUNT = "com.owncloud.android.ui.activity.ACCOUNT";
  52     public static final String EXTRA_WAITING_TO_PREVIEW = "com.owncloud.android.ui.activity.WAITING_TO_PREVIEW";
  53     public static final String EXTRA_FROM_NOTIFICATION= "com.owncloud.android.ui.activity.FROM_NOTIFICATION";
  54
  55     public static final String TAG = FileActivity.class.getSimpleName();
  56
  57
  58     /** OwnCloud {@link Account} where the main {@link OCFile} handled by the activity is located. */
  59     private Account mAccount;
  60
  61     /** Main {@link OCFile} handled by the activity.*/
  62     private OCFile mFile;
  63
  64     /** Flag to signal that the activity will is finishing to enforce the creation of an ownCloud {@link Account} */
  65     private boolean mRedirectingToSetupAccount = false;
  66
  67     /** Flag to signal when the value of mAccount was set */
  68     private boolean mAccountWasSet;
  69
  70     /** Flag to signal when the value of mAccount was restored from a saved state */
  71     private boolean mAccountWasRestored;
  72
  73     /** Flag to signal if the activity is launched by a notification */
  74     private boolean mFromNotification;
  75
  76
  77
  78     /**
  79      * Loads the ownCloud {@link Account} and main {@link OCFile} to be handled by the instance of
  80      * the {@link FileActivity}.
  81      *
  82      * Grants that a valid ownCloud {@link Account} is associated to the instance, or that the user
  83      * is requested to create a new one.
  84      */
  85     @Override
  86     protected void onCreate(Bundle savedInstanceState) {
  87         super.onCreate(savedInstanceState);
  88         Account account;
  89         if(savedInstanceState != null) {
  90             account = savedInstanceState.getParcelable(FileActivity.EXTRA_ACCOUNT);
  91             mFile = savedInstanceState.getParcelable(FileActivity.EXTRA_FILE);
  92             mFromNotification = savedInstanceState.getBoolean(FileActivity.EXTRA_FROM_NOTIFICATION);
  93         } else {
  94             account = getIntent().getParcelableExtra(FileActivity.EXTRA_ACCOUNT);
  95             mFile = getIntent().getParcelableExtra(FileActivity.EXTRA_FILE);
  96             mFromNotification = getIntent().getBooleanExtra(FileActivity.EXTRA_FROM_NOTIFICATION, false);
  97         }
  98
  99         setAccount(account, savedInstanceState != null);
 100
 101     }
 102
 103
 104     /**
 105      *  Since ownCloud {@link Account}s can be managed from the system setting menu,
 106      *  the existence of the {@link Account} associated to the instance must be checked
 107      *  every time it is restarted.
 108      */
 109     @Override
 110     protected void onRestart() {
 111         super.onRestart();
 112         boolean validAccount = (mAccount != null && AccountUtils.setCurrentOwnCloudAccount(getApplicationContext(), mAccount.name));
 113         if (!validAccount) {
 114             swapToDefaultAccount();
 115         }
 116
 117     }
 118
 119
 120     @Override
 121     protected void onStart() {
 122         super.onStart();
 123         if (mAccountWasSet) {
 124             onAccountSet(mAccountWasRestored);
 125         }
 126     }
 127
 128
 129     /**
 130      *  Sets and validates the ownCloud {@link Account} associated to the Activity.
 131      *
 132      *  If not valid, tries to swap it for other valid and existing ownCloud {@link Account}.
 133      *
 134      *  POSTCONDITION: updates {@link #mAccountWasSet} and {@link #mAccountWasRestored}.
 135      *
 136      *  @param account          New {@link Account} to set.
 137      *  @param savedAccount     When 'true', account was retrieved from a saved instance state.
 138      */
 139     private void setAccount(Account account, boolean savedAccount) {
 140         Account oldAccount = mAccount;
 141         boolean validAccount = (account != null && AccountUtils.setCurrentOwnCloudAccount(getApplicationContext(), account.name));
 142         if (validAccount) {
 143             mAccount = account;
 144             mAccountWasSet = true;
 145             mAccountWasRestored = (savedAccount || mAccount.equals(oldAccount));
 146
 147         } else {
 148             swapToDefaultAccount();
 149         }
 150     }
 151
 152
 153     /**
 154      *  Tries to swap the current ownCloud {@link Account} for other valid and existing.
 155      *
 156      *  If no valid ownCloud {@link Account} exists, the the user is requested
 157      *  to create a new ownCloud {@link Account}.
 158      *
 159      *  POSTCONDITION: updates {@link #mAccountWasSet} and {@link #mAccountWasRestored}.
 160      *
 161      *  @return     'True' if the checked {@link Account} was valid.
 162      */
 163     private void swapToDefaultAccount() {
 164         // default to the most recently used account
 165         Account newAccount  = AccountUtils.getCurrentOwnCloudAccount(getApplicationContext());
 166         if (newAccount == null) {
 167             /// no account available: force account creation
 168             createFirstAccount();
 169             mRedirectingToSetupAccount = true;
 170             mAccountWasSet = false;
 171             mAccountWasRestored = false;
 172
 173         } else {
 174             mAccountWasSet = true;
 175             mAccountWasRestored = (newAccount.equals(mAccount));
 176             mAccount = newAccount;
 177         }
 178     }
 179
 180
 181     /**
 182      * Launches the account creation activity. To use when no ownCloud account is available
 183      */
 184     private void createFirstAccount() {
 185         AccountManager am = AccountManager.get(getApplicationContext());
 186         am.addAccount(MainApp.getAccountType(),
 187                         null,
 188                         null,
 189                         null,
 190                         this,
 191                         new AccountCreationCallback(),
 192                         null);
 193     }
 194
 195
 196     /**
 197      * {@inheritDoc}
 198      */
 199     @Override
 200     protected void onSaveInstanceState(Bundle outState) {
 201         super.onSaveInstanceState(outState);
 202         outState.putParcelable(FileActivity.EXTRA_FILE, mFile);
 203         outState.putParcelable(FileActivity.EXTRA_ACCOUNT, mAccount);
 204         outState.putBoolean(FileActivity.EXTRA_FROM_NOTIFICATION, mFromNotification);
 205     }
 206
 207
 208     /**
 209      * Getter for the main {@link OCFile} handled by the activity.
 210      *
 211      * @return  Main {@link OCFile} handled by the activity.
 212      */
 213     public OCFile getFile() {
 214         return mFile;
 215     }
 216
 217
 218     /**
 219      * Setter for the main {@link OCFile} handled by the activity.
 220      *
 221      * @param file  Main {@link OCFile} to be handled by the activity.
 222      */
 223     public void setFile(OCFile file) {
 224         mFile = file;
 225     }
 226
 227
 228     /**
 229      * Getter for the ownCloud {@link Account} where the main {@link OCFile} handled by the activity is located.
 230      *
 231      * @return  OwnCloud {@link Account} where the main {@link OCFile} handled by the activity is located.
 232      */
 233     public Account getAccount() {
 234         return mAccount;
 235     }
 236
 237     /**
 238      * @return Value of mFromNotification: True if the Activity is launched by a notification
 239      */
 240     public boolean fromNotification() {
 241         return mFromNotification;
 242     }
 243
 244     /**
 245      * @return  'True' when the Activity is finishing to enforce the setup of a new account.
 246      */
 247     protected boolean isRedirectingToSetupAccount() {
 248         return mRedirectingToSetupAccount;
 249     }
 250
 251
 252     /**
 253      *  @return 'True' if the server supports the Share API
 254      */
 255     public boolean isSharedSupported() {
 256         if (getAccount() != null) {
 257             AccountManager accountManager = AccountManager.get(this);
 258             return Boolean.parseBoolean(accountManager.getUserData(getAccount(), OwnCloudAccount.Constants.KEY_SUPPORTS_SHARE_API));
 259         }
 260         return false;
 261     }
 262
 263     /**
 264      * Helper class handling a callback from the {@link AccountManager} after the creation of
 265      * a new ownCloud {@link Account} finished, successfully or not.
 266      *
 267      * At this moment, only called after the creation of the first account.
 268      *
 269      * @author David A. Velasco
 270      */
 271     public class AccountCreationCallback implements AccountManagerCallback<Bundle> {
 272
 273         @Override
 274         public void run(AccountManagerFuture<Bundle> future) {
 275             FileActivity.this.mRedirectingToSetupAccount = false;
 276             boolean accountWasSet = false;
 277             if (future != null) {
 278                 try {
 279                     Bundle result;
 280                     result = future.getResult();
 281                     String name = result.getString(AccountManager.KEY_ACCOUNT_NAME);
 282                     String type = result.getString(AccountManager.KEY_ACCOUNT_TYPE);
 283                     if (AccountUtils.setCurrentOwnCloudAccount(getApplicationContext(), name)) {
 284                         setAccount(new Account(name, type), false);
 285                         accountWasSet = true;
 286                     }
 287                 } catch (OperationCanceledException e) {
 288                     Log_OC.d(TAG, "Account creation canceled");
 289
 290                 } catch (Exception e) {
 291                     Log_OC.e(TAG, "Account creation finished in exception: ", e);
 292                 }
 293
 294             } else {
 295                 Log_OC.e(TAG, "Account creation callback with null bundle");
 296             }
 297             if (!accountWasSet) {
 298                 moveTaskToBack(true);
 299             }
 300         }
 301
 302     }
 303
 304
 305     /**
 306      *  Called when the ownCloud {@link Account} associated to the Activity was just updated.
 307      *
 308      *  Child classes must grant that state depending on the {@link Account} is updated.
 309      */
 310     protected abstract void onAccountSet(boolean stateWasRecovered);
 311
 312
 313
 314     public void openFile(OCFile file) {
 315         if (file != null) {
 316             String storagePath = file.getStoragePath();
 317             String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 318
 319             Intent intentForSavedMimeType = new Intent(Intent.ACTION_VIEW);
 320             intentForSavedMimeType.setDataAndType(Uri.parse("file://"+ encodedStoragePath), file.getMimetype());
 321             intentForSavedMimeType.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 322
 323             Intent intentForGuessedMimeType = null;
 324             if (storagePath.lastIndexOf('.') >= 0) {
 325                 String guessedMimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 326                 if (guessedMimeType != null && !guessedMimeType.equals(file.getMimetype())) {
 327                     intentForGuessedMimeType = new Intent(Intent.ACTION_VIEW);
 328                     intentForGuessedMimeType.setDataAndType(Uri.parse("file://"+ encodedStoragePath), guessedMimeType);
 329                     intentForGuessedMimeType.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 330                 }
 331             }
 332
 333             Intent chooserIntent = null;
 334             if (intentForGuessedMimeType != null) {
 335                 chooserIntent = Intent.createChooser(intentForGuessedMimeType, getString(R.string.actionbar_open_with));
 336             } else {
 337                 chooserIntent = Intent.createChooser(intentForSavedMimeType, getString(R.string.actionbar_open_with));
 338             }
 339
 340             startActivity(chooserIntent);
 341
 342         } else {
 343             Log_OC.wtf(TAG, "Trying to open a NULL OCFile");
 344         }
 345     }
 346
 347 }