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