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.Log_OC;
  33 import com.owncloud.android.MainApp;
  34 import com.owncloud.android.R;
  35 import com.owncloud.android.authentication.AccountUtils;
  36 import com.owncloud.android.datamodel.OCFile;
  37
  38
  39 import eu.alefzero.webdav.WebdavUtils;
  40
  41 /**
  42  * Activity with common behaviour for activities handling {@link OCFile}s in ownCloud {@link Account}s .
  43  *
  44  * @author David A. Velasco
  45  */
  46 public abstract class FileActivity extends SherlockFragmentActivity {
  47
  48     public static final String EXTRA_FILE = "com.owncloud.android.ui.activity.FILE";
  49     public static final String EXTRA_ACCOUNT = "com.owncloud.android.ui.activity.ACCOUNT";
  50     public static final String EXTRA_WAITING_TO_PREVIEW = "com.owncloud.android.ui.activity.WAITING_TO_PREVIEW";
  51
  52     public static final String TAG = FileActivity.class.getSimpleName();
  53
  54
  55     /** OwnCloud {@link Account} where the main {@link OCFile} handled by the activity is located. */
  56     private Account mAccount;
  57
  58     /** Main {@link OCFile} handled by the activity.*/
  59     private OCFile mFile;
  60
  61     /** Flag to signal that the activity will is finishing to enforce the creation of an ownCloud {@link Account} */
  62     private boolean mRedirectingToSetupAccount = false;
  63
  64     /** Flag to signal when the value of mAccount was set */
  65     private boolean mAccountWasSet;
  66
  67     /** Flag to signal when the value of mAccount was restored from a saved state */
  68     private boolean mAccountWasRestored;
  69
  70
  71     /**
  72      * Loads the ownCloud {@link Account} and main {@link OCFile} to be handled by the instance of
  73      * the {@link FileActivity}.
  74      *
  75      * Grants that a valid ownCloud {@link Account} is associated to the instance, or that the user
  76      * is requested to create a new one.
  77      */
  78     @Override
  79     protected void onCreate(Bundle savedInstanceState) {
  80         super.onCreate(savedInstanceState);
  81
  82         Account account;
  83         if(savedInstanceState != null) {
  84             account = savedInstanceState.getParcelable(FileActivity.EXTRA_ACCOUNT);
  85             mFile = savedInstanceState.getParcelable(FileActivity.EXTRA_FILE);
  86         } else {
  87             account = getIntent().getParcelableExtra(FileActivity.EXTRA_ACCOUNT);
  88             mFile = getIntent().getParcelableExtra(FileActivity.EXTRA_FILE);
  89         }
  90
  91         setAccount(account, savedInstanceState != null);
  92     }
  93
  94
  95     /**
  96      *  Since ownCloud {@link Account}s can be managed from the system setting menu,
  97      *  the existence of the {@link Account} associated to the instance must be checked
  98      *  every time it is restarted.
  99      */
 100     @Override
 101     protected void onRestart() {
 102         super.onRestart();
 103         boolean validAccount = (mAccount != null && AccountUtils.setCurrentOwnCloudAccount(getApplicationContext(), mAccount.name));
 104         if (!validAccount) {
 105             swapToDefaultAccount();
 106         }
 107
 108     }
 109
 110
 111     @Override
 112     protected void onStart() {
 113         super.onStart();
 114         if (mAccountWasSet) {
 115             onAccountSet(mAccountWasRestored);
 116         }
 117     }
 118
 119
 120     /**
 121      *  Sets and validates the ownCloud {@link Account} associated to the Activity.
 122      *
 123      *  If not valid, tries to swap it for other valid and existing ownCloud {@link Account}.
 124      *
 125      *  POSTCONDITION: updates {@link #mAccountWasSet} and {@link #mAccountWasRestored}.
 126      *
 127      *  @param account          New {@link Account} to set.
 128      *  @param savedAccount     When 'true', account was retrieved from a saved instance state.
 129      */
 130     private void setAccount(Account account, boolean savedAccount) {
 131         Account oldAccount = mAccount;
 132         boolean validAccount = (account != null && AccountUtils.setCurrentOwnCloudAccount(getApplicationContext(), account.name));
 133         if (validAccount) {
 134             mAccount = account;
 135             mAccountWasSet = true;
 136             mAccountWasRestored = (savedAccount || mAccount.equals(oldAccount));
 137
 138         } else {
 139             swapToDefaultAccount();
 140         }
 141     }
 142
 143
 144     /**
 145      *  Tries to swap the current ownCloud {@link Account} for other valid and existing.
 146      *
 147      *  If no valid ownCloud {@link Account} exists, the the user is requested
 148      *  to create a new ownCloud {@link Account}.
 149      *
 150      *  POSTCONDITION: updates {@link #mAccountWasSet} and {@link #mAccountWasRestored}.
 151      *
 152      *  @return     'True' if the checked {@link Account} was valid.
 153      */
 154     private void swapToDefaultAccount() {
 155         // default to the most recently used account
 156         Account newAccount  = AccountUtils.getCurrentOwnCloudAccount(getApplicationContext());
 157         if (newAccount == null) {
 158             /// no account available: force account creation
 159             createFirstAccount();
 160             mRedirectingToSetupAccount = true;
 161             mAccountWasSet = false;
 162             mAccountWasRestored = false;
 163
 164         } else {
 165             mAccountWasSet = true;
 166             mAccountWasRestored = (newAccount.equals(mAccount));
 167             mAccount = newAccount;
 168         }
 169     }
 170
 171
 172     /**
 173      * Launches the account creation activity. To use when no ownCloud account is available
 174      */
 175     private void createFirstAccount() {
 176         AccountManager am = AccountManager.get(getApplicationContext());
 177         am.addAccount(MainApp.getAccountType(),
 178                         null,
 179                         null,
 180                         null,
 181                         this,
 182                         new AccountCreationCallback(),
 183                         null);
 184     }
 185
 186
 187     /**
 188      * {@inheritDoc}
 189      */
 190     @Override
 191     protected void onSaveInstanceState(Bundle outState) {
 192         super.onSaveInstanceState(outState);
 193         outState.putParcelable(FileActivity.EXTRA_FILE, mFile);
 194         outState.putParcelable(FileActivity.EXTRA_ACCOUNT, mAccount);
 195     }
 196
 197
 198     /**
 199      * Getter for the main {@link OCFile} handled by the activity.
 200      *
 201      * @return  Main {@link OCFile} handled by the activity.
 202      */
 203     public OCFile getFile() {
 204         return mFile;
 205     }
 206
 207
 208     /**
 209      * Setter for the main {@link OCFile} handled by the activity.
 210      *
 211      * @param file  Main {@link OCFile} to be handled by the activity.
 212      */
 213     public void setFile(OCFile file) {
 214         mFile = file;
 215     }
 216
 217
 218     /**
 219      * Getter for the ownCloud {@link Account} where the main {@link OCFile} handled by the activity is located.
 220      *
 221      * @return  OwnCloud {@link Account} where the main {@link OCFile} handled by the activity is located.
 222      */
 223     public Account getAccount() {
 224         return mAccount;
 225     }
 226
 227
 228     /**
 229      * @return  'True' when the Activity is finishing to enforce the setup of a new account.
 230      */
 231     protected boolean isRedirectingToSetupAccount() {
 232         return mRedirectingToSetupAccount;
 233     }
 234
 235
 236     /**
 237      * Helper class handling a callback from the {@link AccountManager} after the creation of
 238      * a new ownCloud {@link Account} finished, successfully or not.
 239      *
 240      * At this moment, only called after the creation of the first account.
 241      *
 242      * @author David A. Velasco
 243      */
 244     public class AccountCreationCallback implements AccountManagerCallback<Bundle> {
 245
 246         @Override
 247         public void run(AccountManagerFuture<Bundle> future) {
 248             FileActivity.this.mRedirectingToSetupAccount = false;
 249             boolean accountWasSet = false;
 250             if (future != null) {
 251                 try {
 252                     Bundle result;
 253                     result = future.getResult();
 254                     String name = result.getString(AccountManager.KEY_ACCOUNT_NAME);
 255                     String type = result.getString(AccountManager.KEY_ACCOUNT_TYPE);
 256                     if (AccountUtils.setCurrentOwnCloudAccount(getApplicationContext(), name)) {
 257                         setAccount(new Account(name, type), false);
 258                         accountWasSet = true;
 259                     }
 260                 } catch (OperationCanceledException e) {
 261                     Log_OC.d(TAG, "Account creation canceled");
 262
 263                 } catch (Exception e) {
 264                     Log_OC.e(TAG, "Account creation finished in exception: ", e);
 265                 }
 266
 267             } else {
 268                 Log_OC.e(TAG, "Account creation callback with null bundle");
 269             }
 270             if (!accountWasSet) {
 271                 moveTaskToBack(true);
 272             }
 273         }
 274
 275     }
 276
 277
 278     /**
 279      *  Called when the ownCloud {@link Account} associated to the Activity was just updated.
 280      *
 281      *  Child classes must grant that state depending on the {@link Account} is updated.
 282      */
 283     protected abstract void onAccountSet(boolean stateWasRecovered);
 284
 285
 286
 287     public void openFile(OCFile file) {
 288         if (file != null) {
 289             String storagePath = file.getStoragePath();
 290             String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 291
 292             Intent intentForSavedMimeType = new Intent(Intent.ACTION_VIEW);
 293             intentForSavedMimeType.setDataAndType(Uri.parse("file://"+ encodedStoragePath), file.getMimetype());
 294             intentForSavedMimeType.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 295
 296             Intent intentForGuessedMimeType = null;
 297             if (storagePath.lastIndexOf('.') >= 0) {
 298                 String guessedMimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 299                 if (guessedMimeType != null && !guessedMimeType.equals(file.getMimetype())) {
 300                     intentForGuessedMimeType = new Intent(Intent.ACTION_VIEW);
 301                     intentForGuessedMimeType.setDataAndType(Uri.parse("file://"+ encodedStoragePath), guessedMimeType);
 302                     intentForGuessedMimeType.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 303                 }
 304             }
 305
 306             Intent chooserIntent = null;
 307             if (intentForGuessedMimeType != null) {
 308                 chooserIntent = Intent.createChooser(intentForGuessedMimeType, getString(R.string.actionbar_open_with));
 309             } else {
 310                 chooserIntent = Intent.createChooser(intentForSavedMimeType, getString(R.string.actionbar_open_with));
 311             }
 312
 313             startActivity(chooserIntent);
 314
 315         } else {
 316             Log_OC.wtf(TAG, "Trying to open a NULL OCFile");
 317         }
 318     }
 319
 320 }