1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.tv.util;
18
19import android.accounts.Account;
20import android.content.Context;
21import android.content.SharedPreferences;
22import android.os.RemoteException;
23import android.preference.PreferenceManager;
24import android.support.annotation.Nullable;
25import android.util.Log;
26
27
28import java.util.Arrays;
29
30/**
31 * Helper methods for getting and selecting a user account.
32 */
33public class AccountHelper {
34    private static final String TAG = "AccountHelper";
35    private static final boolean DEBUG = false;
36    private static final String SELECTED_ACCOUNT = "android.tv.livechannels.selected_account";
37
38    private final Context mContext;
39    private final SharedPreferences mDefaultPreferences;
40
41    @Nullable
42    private Account mSelectedAccount;
43
44    public AccountHelper(Context context) {
45        mContext = context.getApplicationContext();
46        mDefaultPreferences = PreferenceManager.getDefaultSharedPreferences(mContext);
47    }
48
49    /**
50     * Returns the currently selected account or {@code null} if none is selected.
51     */
52    @Nullable
53    public Account getSelectedAccount() {
54        String accountId = mDefaultPreferences.getString(SELECTED_ACCOUNT, null);
55        if (accountId == null) {
56            return null;
57        }
58        if (mSelectedAccount == null || !mSelectedAccount.name.equals((accountId))) {
59            mSelectedAccount = null;
60            for (Account account : getEligibleAccounts()) {
61                if (account.name.equals(accountId)) {
62                    mSelectedAccount = account;
63                    break;
64                }
65            }
66        }
67        return mSelectedAccount;
68    }
69
70    /**
71     * Returns all eligible accounts .
72     */
73    private Account[] getEligibleAccounts() {
74        return new Account[0];
75    }
76
77    /**
78     * Selects the first account available.
79     *
80     * @return selected account or {@code null} if none is selected.
81     */
82    @Nullable
83    public Account selectFirstAccount() {
84        Account account = getFirstEligibleAccount();
85        if (account != null) {
86            selectAccount(account);
87        }
88        return account;
89    }
90
91    /**
92     * Gets the first account eligible.
93     *
94     * @return first account or {@code null} if none is eligible.
95     */
96    @Nullable
97    public Account getFirstEligibleAccount() {
98        Account[] accounts = getEligibleAccounts();
99        return accounts.length == 0 ? null : accounts[0];
100    }
101
102    /**
103     * Sets the given account as the selected account.
104     */
105    private void selectAccount(Account account) {
106        SharedPreferences defaultPreferences = PreferenceManager
107                .getDefaultSharedPreferences(mContext);
108        defaultPreferences.edit().putString(SELECTED_ACCOUNT, account.name).commit();
109    }
110}
111
112