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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.tv.util.account;
import android.accounts.Account;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;
/** Helper methods for getting and selecting a user account. */
public class AccountHelperImpl implements com.android.tv.util.account.AccountHelper {
private static final String SELECTED_ACCOUNT = "android.tv.livechannels.selected_account";
protected final Context mContext;
private final SharedPreferences mDefaultPreferences;
@Nullable private Account mSelectedAccount;
public AccountHelperImpl(Context context) {
mContext = context.getApplicationContext();
mDefaultPreferences = PreferenceManager.getDefaultSharedPreferences(mContext);
}
/** Returns the currently selected account or {@code null} if none is selected. */
@Override
@Nullable
public final Account getSelectedAccount() {
String accountId = mDefaultPreferences.getString(SELECTED_ACCOUNT, null);
if (accountId == null) {
return null;
}
if (mSelectedAccount == null || !mSelectedAccount.name.equals((accountId))) {
mSelectedAccount = null;
for (Account account : getEligibleAccounts()) {
if (account.name.equals(accountId)) {
mSelectedAccount = account;
break;
}
}
}
return mSelectedAccount;
}
/**
* Returns all eligible accounts.
*
* <p>Override this method to return the accounts needed.
*/
protected Account[] getEligibleAccounts() {
return new Account[0];
}
/**
* Selects the first account available.
*
* @return selected account or {@code null} if none is selected.
*/
@Override
@Nullable
public final Account selectFirstAccount() {
Account account = getFirstEligibleAccount();
if (account != null) {
selectAccount(account);
}
return account;
}
/**
* Gets the first account eligible.
*
* @return first account or {@code null} if none is eligible.
*/
@Override
@Nullable
public final Account getFirstEligibleAccount() {
Account[] accounts = getEligibleAccounts();
return accounts.length == 0 ? null : accounts[0];
}
/** Sets the given account as the selected account. */
private void selectAccount(Account account) {
SharedPreferences defaultPreferences =
PreferenceManager.getDefaultSharedPreferences(mContext);
defaultPreferences.edit().putString(SELECTED_ACCOUNT, account.name).commit();
}
}
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