michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.sync.config.activities;
michael@0: 
michael@0: import java.util.HashMap;
michael@0: import java.util.Map;
michael@0: import java.util.Map.Entry;
michael@0: import java.util.Set;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.background.common.log.Logger;
michael@0: import org.mozilla.gecko.sync.SyncConfiguration;
michael@0: import org.mozilla.gecko.sync.ThreadPool;
michael@0: import org.mozilla.gecko.sync.setup.SyncAccounts;
michael@0: import org.mozilla.gecko.sync.syncadapter.SyncAdapter;
michael@0: 
michael@0: import android.accounts.Account;
michael@0: import android.accounts.AccountManager;
michael@0: import android.app.Activity;
michael@0: import android.app.AlertDialog;
michael@0: import android.content.Context;
michael@0: import android.content.DialogInterface;
michael@0: import android.content.DialogInterface.OnDismissListener;
michael@0: import android.content.SharedPreferences;
michael@0: import android.os.Bundle;
michael@0: import android.widget.ListView;
michael@0: import android.widget.Toast;
michael@0: 
michael@0: /**
michael@0:  * Provides a user-facing interface for selecting engines to sync. This activity
michael@0:  * can be launched from the Sync Settings preferences screen, and will save the
michael@0:  * selected engines to the
michael@0:  * <code>SyncConfiguration.PREF_USER_SELECTED_ENGINES_TO_SYNC</code> pref.
michael@0:  *
michael@0:  * On launch, it displays the engines stored in the saved pref if it exists, or
michael@0:  * <code>SyncConfiguration.enabledEngineNames()</code> if it doesn't, defaulting
michael@0:  * to <code>SyncConfiguration.validEngineNames()</code> if neither exists.
michael@0:  *
michael@0:  * During a sync, the
michael@0:  * <code>SyncConfiguration.PREF_USER_SELECTED_ENGINES_TO_SYNC</code> pref will
michael@0:  * be cleared after the engine changes are applied to meta/global.
michael@0:  */
michael@0: 
michael@0: public class SelectEnginesActivity extends Activity implements
michael@0:     DialogInterface.OnClickListener, DialogInterface.OnMultiChoiceClickListener {
michael@0:   public final static String LOG_TAG = "SelectEnginesAct";
michael@0: 
michael@0:   protected AccountManager mAccountManager;
michael@0:   protected Context mContext;
michael@0: 
michael@0:   // Collections names corresponding to displayed (localized) engine options.
michael@0:   final String[] _collectionsNames = new String[] {
michael@0:     "bookmarks",
michael@0:     "passwords",
michael@0:     "history",
michael@0:     "tabs"
michael@0:   };
michael@0: 
michael@0:   // Engine names localized for display in Sync Settings.
michael@0:   protected String[] _options;
michael@0:   // Selection state of engines corresponding to _options array.
michael@0:   final boolean[] _selections = new boolean[_collectionsNames.length];
michael@0:   protected Account account;
michael@0:   protected SharedPreferences accountPrefs;
michael@0: 
michael@0:   @Override
michael@0:   public void onCreate(Bundle savedInstanceState) {
michael@0:     super.onCreate(savedInstanceState);
michael@0:     mContext = getApplicationContext();
michael@0:     mAccountManager = AccountManager.get(mContext);
michael@0:     _options = new String[] {
michael@0:         getString(R.string.sync_configure_engines_title_bookmarks),
michael@0:         getString(R.string.sync_configure_engines_title_passwords),
michael@0:         getString(R.string.sync_configure_engines_title_history),
michael@0:         getString(R.string.sync_configure_engines_title_tabs) };
michael@0: 
michael@0:     // Fetch account prefs for configuring engines.
michael@0:     ThreadPool.run(new Runnable() {
michael@0:       @Override
michael@0:       public void run() {
michael@0:         Account[] accounts = SyncAccounts.syncAccounts(mContext);
michael@0:         if (accounts.length == 0) {
michael@0:           Logger.error(LOG_TAG, "Failed to get account!");
michael@0:           finish();
michael@0:           return;
michael@0:         } else {
michael@0:           // Only supports one account per type.
michael@0:           account = accounts[0];
michael@0:           try {
michael@0:             if (accountPrefs == null) {
michael@0:               accountPrefs = SyncAccounts.blockingPrefsFromDefaultProfileV0(mContext, mAccountManager, account);
michael@0:             }
michael@0:           } catch (Exception e) {
michael@0:             Logger.error(LOG_TAG, "Failed to get sync account info or shared preferences.", e);
michael@0:             finish();
michael@0:           }
michael@0:           setSelectionsInArray(getEnginesToSelect(accountPrefs), _selections);
michael@0:         }
michael@0:       }
michael@0:     });
michael@0:   }
michael@0: 
michael@0:   @Override
michael@0:   public void onResume() {
michael@0:     super.onResume();
michael@0:     if (accountPrefs != null) {
michael@0:       setSelectionsInArray(getEnginesToSelect(accountPrefs), _selections);
michael@0:     }
michael@0:     AlertDialog dialog = new AlertDialog.Builder(this)
michael@0:         .setTitle(R.string.sync_configure_engines_sync_my_title)
michael@0:         .setMultiChoiceItems(_options, _selections, this)
michael@0:         .setIcon(R.drawable.icon).setPositiveButton(android.R.string.ok, this)
michael@0:         .setNegativeButton(android.R.string.cancel, this).create();
michael@0: 
michael@0:     dialog.setOnDismissListener(new OnDismissListener() {
michael@0:       @Override
michael@0:       public void onDismiss(DialogInterface dialog) {
michael@0:         finish();
michael@0:       }
michael@0:     });
michael@0: 
michael@0:     dialog.show();
michael@0:   }
michael@0: 
michael@0:   private static Set<String> getEnginesFromPrefs(SharedPreferences syncPrefs) {
michael@0:     Set<String> engines = SyncConfiguration.getEnabledEngineNames(syncPrefs);
michael@0:     if (engines == null) {
michael@0:       engines = SyncConfiguration.validEngineNames();
michael@0:     }
michael@0:     return engines;
michael@0:   }
michael@0: 
michael@0:   /**
michael@0:    * Fetches the engine names that should be displayed as selected for syncing.
michael@0:    * Check first for selected engines set by this activity, then the enabled
michael@0:    * engines, and finally default to the set of valid engine names for Android
michael@0:    * Sync if neither exists.
michael@0:    *
michael@0:    * @param syncPrefs
michael@0:    *          <code>SharedPreferences</code> of Account being modified.
michael@0:    * @return Set<String> of engine names to display as selected. Should never be
michael@0:    *         null.
michael@0:    */
michael@0:   public static Set<String> getEnginesToSelect(SharedPreferences syncPrefs) {
michael@0:     Set<String> engines = getEnginesFromPrefs(syncPrefs);
michael@0:     Map<String, Boolean> engineSelections = SyncConfiguration.getUserSelectedEngines(syncPrefs);
michael@0:     if (engineSelections != null) {
michael@0:       for (Entry<String, Boolean> pair : engineSelections.entrySet()) {
michael@0:         if (pair.getValue()) {
michael@0:           engines.add(pair.getKey());
michael@0:         } else {
michael@0:           engines.remove(pair.getKey());
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:     return engines;
michael@0:   }
michael@0: 
michael@0:   public void setSelectionsInArray(Set<String> selected, boolean[] array) {
michael@0:     for (int i = 0; i < _collectionsNames.length; i++) {
michael@0:       array[i] = selected.contains(_collectionsNames[i]);
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   @Override
michael@0:   public void onClick(DialogInterface dialog, int which) {
michael@0:     if (which == DialogInterface.BUTTON_POSITIVE) {
michael@0:       Logger.debug(LOG_TAG, "Saving selected engines.");
michael@0:       saveSelections();
michael@0:       setResult(RESULT_OK);
michael@0:       Toast.makeText(this, R.string.sync_notification_savedprefs, Toast.LENGTH_SHORT).show();
michael@0:     } else {
michael@0:       setResult(RESULT_CANCELED);
michael@0:     }
michael@0:     finish();
michael@0:   }
michael@0: 
michael@0:   @Override
michael@0:   public void onClick(DialogInterface dialog, int which, boolean isChecked) {
michael@0:     // Display multi-selection clicks in UI.
michael@0:     _selections[which] = isChecked;
michael@0:     ListView selectionsList = ((AlertDialog) dialog).getListView();
michael@0:     selectionsList.setItemChecked(which, isChecked);
michael@0:   }
michael@0: 
michael@0:   /**
michael@0:    * Persists engine selection state to SharedPreferences if it has changed.
michael@0:    *
michael@0:    * @return true if changed, false otherwise.
michael@0:    */
michael@0:   private void saveSelections() {
michael@0:     boolean[] origSelections = new boolean[_options.length];
michael@0:     setSelectionsInArray(getEnginesFromPrefs(accountPrefs), origSelections);
michael@0: 
michael@0:     Map<String, Boolean> engineSelections = new HashMap<String, Boolean>();
michael@0:     for (int i = 0; i < _selections.length; i++) {
michael@0:       if (_selections[i] != origSelections[i]) {
michael@0:         engineSelections.put(_collectionsNames[i], _selections[i]);
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     // No GlobalSession.config, so store directly to prefs.
michael@0:     SyncConfiguration.storeSelectedEnginesToPrefs(accountPrefs, engineSelections);
michael@0: 
michael@0:     // Request immediate sync.
michael@0:     SyncAdapter.requestImmediateSync(account, null);
michael@0:   }
michael@0: }