1/*
2 * Copyright (C) 2012 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.settings.accounts;
18
19import android.accounts.Account;
20import android.accounts.AccountManager;
21import android.accounts.AuthenticatorDescription;
22import android.content.Context;
23import android.content.pm.PackageManager;
24import android.content.res.Resources;
25import android.graphics.drawable.Drawable;
26import android.util.Log;
27
28import java.util.ArrayList;
29import java.util.HashMap;
30import java.util.Map;
31
32public class AuthenticatorHelper {
33
34    private static final String TAG = "AuthenticatorHelper";
35    private Map<String, AuthenticatorDescription> mTypeToAuthDescription
36            = new HashMap<String, AuthenticatorDescription>();
37    private AuthenticatorDescription[] mAuthDescs;
38    private ArrayList<String> mEnabledAccountTypes = new ArrayList<String>();
39    private Map<String, Drawable> mAccTypeIconCache = new HashMap<String, Drawable>();
40
41    public AuthenticatorHelper() {
42    }
43
44    public String[] getEnabledAccountTypes() {
45        return mEnabledAccountTypes.toArray(new String[mEnabledAccountTypes.size()]);
46    }
47
48    /**
49     * Gets an icon associated with a particular account type. If none found, return null.
50     * @param accountType the type of account
51     * @return a drawable for the icon or null if one cannot be found.
52     */
53    public Drawable getDrawableForType(Context context, final String accountType) {
54        Drawable icon = null;
55        if (mAccTypeIconCache.containsKey(accountType)) {
56            return mAccTypeIconCache.get(accountType);
57        }
58        if (mTypeToAuthDescription.containsKey(accountType)) {
59            try {
60                AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType);
61                Context authContext = context.createPackageContext(desc.packageName, 0);
62                icon = authContext.getResources().getDrawable(desc.iconId);
63                mAccTypeIconCache.put(accountType, icon);
64            } catch (PackageManager.NameNotFoundException e) {
65            } catch (Resources.NotFoundException e) {
66            }
67        }
68        if (icon == null) {
69            icon = context.getPackageManager().getDefaultActivityIcon();
70        }
71        return icon;
72    }
73
74    /**
75     * Gets the label associated with a particular account type. If none found, return null.
76     * @param accountType the type of account
77     * @return a CharSequence for the label or null if one cannot be found.
78     */
79    public CharSequence getLabelForType(Context context, final String accountType) {
80        CharSequence label = null;
81        if (mTypeToAuthDescription.containsKey(accountType)) {
82            try {
83                AuthenticatorDescription desc = mTypeToAuthDescription.get(accountType);
84                Context authContext = context.createPackageContext(desc.packageName, 0);
85                label = authContext.getResources().getText(desc.labelId);
86            } catch (PackageManager.NameNotFoundException e) {
87                Log.w(TAG, "No label name for account type " + accountType);
88            } catch (Resources.NotFoundException e) {
89                Log.w(TAG, "No label icon for account type " + accountType);
90            }
91        }
92        return label;
93    }
94
95    /**
96     * Updates provider icons. Subclasses should call this in onCreate()
97     * and update any UI that depends on AuthenticatorDescriptions in onAuthDescriptionsUpdated().
98     */
99    public void updateAuthDescriptions(Context context) {
100        mAuthDescs = AccountManager.get(context).getAuthenticatorTypes();
101        for (int i = 0; i < mAuthDescs.length; i++) {
102            mTypeToAuthDescription.put(mAuthDescs[i].type, mAuthDescs[i]);
103        }
104    }
105
106    public void onAccountsUpdated(Context context, Account[] accounts) {
107        if (accounts == null) {
108            accounts = AccountManager.get(context).getAccounts();
109        }
110        mEnabledAccountTypes.clear();
111        mAccTypeIconCache.clear();
112        for (Account account: accounts) {
113            if (!mEnabledAccountTypes.contains(account.type)) {
114                mEnabledAccountTypes.add(account.type);
115            }
116        }
117    }
118
119    public boolean containsAccountType(String accountType) {
120        return mTypeToAuthDescription.containsKey(accountType);
121    }
122
123    public AuthenticatorDescription getAccountTypeDescription(String accountType) {
124        return mTypeToAuthDescription.get(accountType);
125    }
126
127    public boolean hasAccountPreferences(final String accountType) {
128        if (containsAccountType(accountType)) {
129            AuthenticatorDescription desc = getAccountTypeDescription(accountType);
130            if (desc != null && desc.accountPreferencesId != 0) {
131                return true;
132            }
133        }
134        return false;
135    }
136}
137