1/*
2 * Copyright (C) 2010 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.email.service;
18
19import android.accounts.AccountManager;
20import android.app.IntentService;
21import android.content.ComponentName;
22import android.content.ContentResolver;
23import android.content.ContentUris;
24import android.content.ContentValues;
25import android.content.Context;
26import android.content.Intent;
27import android.content.pm.PackageManager;
28import android.database.Cursor;
29import android.net.Uri;
30import android.util.Log;
31
32import com.android.email.Email;
33import com.android.email.Preferences;
34import com.android.email.SecurityPolicy;
35import com.android.email.VendorPolicyLoader;
36import com.android.email.activity.setup.AccountSettings;
37import com.android.emailcommon.Logging;
38import com.android.emailcommon.provider.Account;
39import com.android.emailcommon.provider.EmailContent.AccountColumns;
40import com.android.emailcommon.provider.HostAuth;
41
42/**
43 * The service that really handles broadcast intents on a worker thread.
44 *
45 * We make it a service, because:
46 * <ul>
47 *   <li>So that it's less likely for the process to get killed.
48 *   <li>Even if it does, the Intent that have started it will be re-delivered by the system,
49 *   and we can start the process again.  (Using {@link #setIntentRedelivery}).
50 * </ul>
51 *
52 * This also handles the DeviceAdminReceiver in SecurityPolicy, because it is also
53 * a BroadcastReceiver and requires the same processing semantics.
54 */
55public class EmailBroadcastProcessorService extends IntentService {
56    // Action used for BroadcastReceiver entry point
57    private static final String ACTION_BROADCAST = "broadcast_receiver";
58
59    // Dialing "*#*#36245#*#*" to open the debug screen.   "36245" = "email"
60    private static final String ACTION_SECRET_CODE = "android.provider.Telephony.SECRET_CODE";
61    private static final String SECRET_CODE_HOST_DEBUG_SCREEN = "36245";
62
63    // This is a helper used to process DeviceAdminReceiver messages
64    private static final String ACTION_DEVICE_POLICY_ADMIN = "com.android.email.devicepolicy";
65    private static final String EXTRA_DEVICE_POLICY_ADMIN = "message_code";
66
67    public EmailBroadcastProcessorService() {
68        // Class name will be the thread name.
69        super(EmailBroadcastProcessorService.class.getName());
70
71        // Intent should be redelivered if the process gets killed before completing the job.
72        setIntentRedelivery(true);
73    }
74
75    /**
76     * Entry point for {@link EmailBroadcastReceiver}.
77     */
78    public static void processBroadcastIntent(Context context, Intent broadcastIntent) {
79        Intent i = new Intent(context, EmailBroadcastProcessorService.class);
80        i.setAction(ACTION_BROADCAST);
81        i.putExtra(Intent.EXTRA_INTENT, broadcastIntent);
82        context.startService(i);
83    }
84
85    /**
86     * Entry point for {@link com.android.email.SecurityPolicy.PolicyAdmin}.  These will
87     * simply callback to {@link
88     * com.android.email.SecurityPolicy#onDeviceAdminReceiverMessage(Context, int)}.
89     */
90    public static void processDevicePolicyMessage(Context context, int message) {
91        Intent i = new Intent(context, EmailBroadcastProcessorService.class);
92        i.setAction(ACTION_DEVICE_POLICY_ADMIN);
93        i.putExtra(EXTRA_DEVICE_POLICY_ADMIN, message);
94        context.startService(i);
95    }
96
97    @Override
98    protected void onHandleIntent(Intent intent) {
99        // This method is called on a worker thread.
100
101        // Dispatch from entry point
102        final String action = intent.getAction();
103        if (ACTION_BROADCAST.equals(action)) {
104            final Intent broadcastIntent = intent.getParcelableExtra(Intent.EXTRA_INTENT);
105            final String broadcastAction = broadcastIntent.getAction();
106
107            if (Intent.ACTION_BOOT_COMPLETED.equals(broadcastAction)) {
108                onBootCompleted();
109                // Force policies to be set in DPM
110                SecurityPolicy.getInstance(this);
111            // TODO: Do a better job when we get ACTION_DEVICE_STORAGE_LOW.
112            //       The code below came from very old code....
113            } else if (Intent.ACTION_DEVICE_STORAGE_LOW.equals(broadcastAction)) {
114                // Stop IMAP/POP3 poll.
115                MailService.actionCancel(this);
116            } else if (Intent.ACTION_DEVICE_STORAGE_OK.equals(broadcastAction)) {
117                enableComponentsIfNecessary();
118            } else if (ACTION_SECRET_CODE.equals(broadcastAction)
119                    && SECRET_CODE_HOST_DEBUG_SCREEN.equals(broadcastIntent.getData().getHost())) {
120                AccountSettings.actionSettingsWithDebug(this);
121            } else if (AccountManager.LOGIN_ACCOUNTS_CHANGED_ACTION.equals(broadcastAction)) {
122                onSystemAccountChanged();
123            }
124        } else if (ACTION_DEVICE_POLICY_ADMIN.equals(action)) {
125            int message = intent.getIntExtra(EXTRA_DEVICE_POLICY_ADMIN, -1);
126            SecurityPolicy.onDeviceAdminReceiverMessage(this, message);
127        }
128    }
129
130    private void enableComponentsIfNecessary() {
131        if (Email.setServicesEnabledSync(this)) {
132            // At least one account exists.
133            // TODO probably we should check if it's a POP/IMAP account.
134            MailService.actionReschedule(this);
135        }
136    }
137
138    /**
139     * Handles {@link Intent#ACTION_BOOT_COMPLETED}.  Called on a worker thread.
140     */
141    private void onBootCompleted() {
142        performOneTimeInitialization();
143
144        enableComponentsIfNecessary();
145
146        // Starts the service for Exchange, if supported.
147        EmailServiceUtils.startExchangeService(this);
148    }
149
150    private void performOneTimeInitialization() {
151        final Preferences pref = Preferences.getPreferences(this);
152        int progress = pref.getOneTimeInitializationProgress();
153        final int initialProgress = progress;
154
155        if (progress < 1) {
156            Log.i(Logging.LOG_TAG, "Onetime initialization: 1");
157            progress = 1;
158            if (VendorPolicyLoader.getInstance(this).useAlternateExchangeStrings()) {
159                setComponentEnabled(EasAuthenticatorServiceAlternate.class, true);
160                setComponentEnabled(EasAuthenticatorService.class, false);
161            }
162        }
163
164        if (progress < 2) {
165            Log.i(Logging.LOG_TAG, "Onetime initialization: 2");
166            progress = 2;
167            setImapDeletePolicy(this);
168        }
169
170        // Add your initialization steps here.
171        // Use "progress" to skip the initializations that's already done before.
172        // Using this preference also makes it safe when a user skips an upgrade.  (i.e. upgrading
173        // version N to version N+2)
174
175        if (progress != initialProgress) {
176            pref.setOneTimeInitializationProgress(progress);
177            Log.i(Logging.LOG_TAG, "Onetime initialization: completed.");
178        }
179    }
180
181    /**
182     * Sets the delete policy to the correct value for all IMAP accounts. This will have no
183     * effect on either EAS or POP3 accounts.
184     */
185    /*package*/ static void setImapDeletePolicy(Context context) {
186        ContentResolver resolver = context.getContentResolver();
187        Cursor c = resolver.query(Account.CONTENT_URI, Account.CONTENT_PROJECTION,
188                null, null, null);
189        try {
190            while (c.moveToNext()) {
191                long recvAuthKey = c.getLong(Account.CONTENT_HOST_AUTH_KEY_RECV_COLUMN);
192                HostAuth recvAuth = HostAuth.restoreHostAuthWithId(context, recvAuthKey);
193                if (HostAuth.SCHEME_IMAP.equals(recvAuth.mProtocol)) {
194                    int flags = c.getInt(Account.CONTENT_FLAGS_COLUMN);
195                    flags &= ~Account.FLAGS_DELETE_POLICY_MASK;
196                    flags |= Account.DELETE_POLICY_ON_DELETE << Account.FLAGS_DELETE_POLICY_SHIFT;
197                    ContentValues cv = new ContentValues();
198                    cv.put(AccountColumns.FLAGS, flags);
199                    long accountId = c.getLong(Account.CONTENT_ID_COLUMN);
200                    Uri uri = ContentUris.withAppendedId(Account.CONTENT_URI, accountId);
201                    resolver.update(uri, cv, null, null);
202                }
203            }
204        } finally {
205            c.close();
206        }
207    }
208
209    private void setComponentEnabled(Class<?> clazz, boolean enabled) {
210        final ComponentName c = new ComponentName(this, clazz.getName());
211        getPackageManager().setComponentEnabledSetting(c,
212                enabled ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
213                        : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
214                PackageManager.DONT_KILL_APP);
215    }
216
217    private void onSystemAccountChanged() {
218        Log.i(Logging.LOG_TAG, "System accounts updated.");
219        MailService.reconcilePopImapAccountsSync(this);
220
221        // If the exchange service wasn't already running, starting it will cause exchange account
222        // reconciliation to be performed.  The service stops itself it there are no EAS accounts.
223        EmailServiceUtils.startExchangeService(this);
224    }
225}
226