634 lines
25 KiB
Java
634 lines
25 KiB
Java
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.email;
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import com.android.email.mail.MessagingException;
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import com.android.email.mail.Store;
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import com.android.email.provider.AttachmentProvider;
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import com.android.email.provider.EmailContent;
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import com.android.email.provider.EmailContent.Account;
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import com.android.email.provider.EmailContent.Attachment;
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import com.android.email.provider.EmailContent.Mailbox;
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import com.android.email.provider.EmailContent.Message;
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import com.android.email.service.EmailServiceProxy;
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import com.android.exchange.EmailServiceStatus;
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import com.android.exchange.IEmailService;
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import com.android.exchange.IEmailServiceCallback;
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import com.android.exchange.SyncManager;
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import android.content.ContentResolver;
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import android.content.ContentUris;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.net.Uri;
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import android.os.RemoteException;
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import android.util.Log;
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import java.io.File;
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import java.util.HashSet;
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/**
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* New central controller/dispatcher for Email activities that may require remote operations.
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* Handles disambiguating between legacy MessagingController operations and newer provider/sync
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* based code.
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*/
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public class Controller {
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static Controller sInstance;
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private Context mContext;
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private Context mProviderContext;
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private MessagingController mLegacyController;
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private HashSet<Result> mListeners = new HashSet<Result>();
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private static String[] MESSAGEID_TO_ACCOUNTID_PROJECTION = new String[] {
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EmailContent.RECORD_ID,
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EmailContent.MessageColumns.ACCOUNT_KEY
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};
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private static int MESSAGEID_TO_ACCOUNTID_COLUMN_ACCOUNTID = 1;
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protected Controller(Context _context) {
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mContext = _context;
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mProviderContext = _context;
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mLegacyController = MessagingController.getInstance(mContext);
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}
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/**
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* Gets or creates the singleton instance of Controller.
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* @param _context The context that will be used for all underlying system access
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*/
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public synchronized static Controller getInstance(Context _context) {
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if (sInstance == null) {
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sInstance = new Controller(_context);
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}
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return sInstance;
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}
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/**
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* For testing only: Inject a different context for provider access. This will be
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* used internally for access the underlying provider (e.g. getContentResolver().query()).
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* @param providerContext the provider context to be used by this instance
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*/
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public void setProviderContext(Context providerContext) {
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mProviderContext = providerContext;
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}
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/**
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* Any UI code that wishes for callback results (on async ops) should register their callback
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* here (typically from onResume()). Unregistered callbacks will never be called, to prevent
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* problems when the command completes and the activity has already paused or finished.
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* @param listener The callback that may be used in action methods
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*/
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public void addResultCallback(Result listener) {
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synchronized (mListeners) {
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mListeners.add(listener);
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}
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}
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/**
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* Any UI code that no longer wishes for callback results (on async ops) should unregister
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* their callback here (typically from onPause()). Unregistered callbacks will never be called,
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* to prevent problems when the command completes and the activity has already paused or
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* finished.
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* @param listener The callback that may no longer be used
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*/
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public void removeResultCallback(Result listener) {
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synchronized (mListeners) {
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mListeners.remove(listener);
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}
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}
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private boolean isActiveResultCallback(Result listener) {
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synchronized (mListeners) {
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return mListeners.contains(listener);
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}
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}
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/**
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* Request a remote update of mailboxes for an account.
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*
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* TODO: Implement (if any) for non-MessagingController
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* TODO: Probably the right way is to create a fake "service" for MessagingController ops
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*/
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public void updateMailboxList(final EmailContent.Account account, final Result callback) {
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// 1. determine if we can use MessagingController for this
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boolean legacyController = isMessagingController(account);
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// 2. if not...?
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// TODO: for now, just pretend "it worked"
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if (!legacyController) {
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if (callback != null) {
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callback.updateMailboxListCallback(null, account.mId);
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}
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return;
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}
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// 3. if so, make the call
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new Thread() {
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@Override
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public void run() {
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MessagingListener listener = new LegacyListener(callback);
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mLegacyController.addListener(listener);
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mLegacyController.listFolders(account, listener);
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}
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}.start();
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}
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/**
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* Request a remote update of a mailbox.
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*
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* The contract here should be to try and update the headers ASAP, in order to populate
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* a simple message list. We should also at this point queue up a background task of
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* downloading some/all of the messages in this mailbox, but that should be interruptable.
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*/
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public void updateMailbox(final EmailContent.Account account,
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final EmailContent.Mailbox mailbox, final Result callback) {
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// 1. determine if we can use MessagingController for this
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boolean legacyController = isMessagingController(account);
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// 2. if not...?
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// TODO: for now, just pretend "it worked"
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if (!legacyController) {
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if (callback != null) {
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callback.updateMailboxCallback(null, account.mId, mailbox.mId, -1, -1);
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}
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return;
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}
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// 3. if so, make the call
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new Thread() {
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@Override
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public void run() {
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MessagingListener listener = new LegacyListener(callback);
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mLegacyController.addListener(listener);
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mLegacyController.synchronizeMailbox(account, mailbox, listener);
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}
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}.start();
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}
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/**
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* Saves the message to a mailbox of given type.
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* @param message the message (must have the mAccountId set).
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* @param mailboxType the mailbox type (e.g. Mailbox.TYPE_DRAFTS).
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* TODO: UI feedback.
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* TODO: use AsyncTask instead of Thread
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*/
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public void saveToMailbox(final EmailContent.Message message, final int mailboxType) {
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new Thread() {
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@Override
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public void run() {
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long accountId = message.mAccountKey;
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long mailboxId = findOrCreateMailboxOfType(accountId, mailboxType);
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message.mMailboxKey = mailboxId;
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message.save(mContext);
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}
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}.start();
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}
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/**
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* @param accountId the account id
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* @param mailboxType the mailbox type (e.g. EmailContent.Mailbox.TYPE_TRASH)
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* @return the id of the mailbox. The mailbox is created if not existing.
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* Returns Mailbox.NO_MAILBOX if the accountId or mailboxType are negative.
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* Does not validate the input in other ways (e.g. does not verify the existence of account).
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*/
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public long findOrCreateMailboxOfType(long accountId, int mailboxType) {
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if (accountId < 0 || mailboxType < 0) {
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return Mailbox.NO_MAILBOX;
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}
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long mailboxId =
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Mailbox.findMailboxOfType(mProviderContext, accountId, mailboxType);
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return mailboxId == Mailbox.NO_MAILBOX ? createMailbox(accountId, mailboxType) : mailboxId;
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}
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/**
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* @param mailboxType the mailbox type
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* @return the resource string corresponding to the mailbox type, empty if not found.
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*/
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/* package */ String getSpecialMailboxDisplayName(int mailboxType) {
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int resId = -1;
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switch (mailboxType) {
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case Mailbox.TYPE_INBOX:
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// TODO: there is no special_mailbox_display_name_inbox; why?
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resId = R.string.special_mailbox_name_inbox;
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break;
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case Mailbox.TYPE_OUTBOX:
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resId = R.string.special_mailbox_display_name_outbox;
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break;
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case Mailbox.TYPE_DRAFTS:
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resId = R.string.special_mailbox_display_name_drafts;
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break;
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case Mailbox.TYPE_TRASH:
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resId = R.string.special_mailbox_display_name_trash;
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break;
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case Mailbox.TYPE_SENT:
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resId = R.string.special_mailbox_display_name_sent;
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break;
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}
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return resId != -1 ? mContext.getString(resId) : "";
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}
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/**
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* Create a mailbox given the account and mailboxType.
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* TODO: Does this need to be signaled explicitly to the sync engines?
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* As this method is only used internally ('private'), it does not
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* validate its inputs (accountId and mailboxType).
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*/
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/* package */ long createMailbox(long accountId, int mailboxType) {
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if (accountId < 0 || mailboxType < 0) {
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String mes = "Invalid arguments " + accountId + ' ' + mailboxType;
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Log.e(Email.LOG_TAG, mes);
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throw new RuntimeException(mes);
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}
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Mailbox box = new Mailbox();
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box.mAccountKey = accountId;
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box.mType = mailboxType;
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box.mSyncInterval = EmailContent.Account.CHECK_INTERVAL_NEVER;
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box.mFlagVisible = true;
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box.mDisplayName = getSpecialMailboxDisplayName(mailboxType);
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box.save(mProviderContext);
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return box.mId;
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}
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/**
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* Send a message:
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* - move the message to Outbox (the message is assumed to be in Drafts).
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* - perform any necessary notification
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* - do the work in a separate (non-UI) thread
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* @param messageId the id of the message to send
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*/
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public void sendMessage(long messageId, long accountId) {
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ContentResolver resolver = mProviderContext.getContentResolver();
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if (accountId == -1) {
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accountId = lookupAccountForMessage(messageId);
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}
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if (accountId == -1) {
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// probably the message was not found
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if (Email.LOGD) {
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Email.log("no account found for message " + messageId);
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}
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return;
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}
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// Move to Outbox
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long outboxId = findOrCreateMailboxOfType(accountId, Mailbox.TYPE_OUTBOX);
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ContentValues cv = new ContentValues();
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cv.put(EmailContent.MessageColumns.MAILBOX_KEY, outboxId);
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// does this need to be SYNCED_CONTENT_URI instead?
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Uri uri = ContentUris.withAppendedId(EmailContent.Message.CONTENT_URI, messageId);
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resolver.update(uri, cv, null, null);
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// TODO: notifications
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}
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/**
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* @param messageId the id of message
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* @return the accountId corresponding to the given messageId, or -1 if not found.
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*/
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private long lookupAccountForMessage(long messageId) {
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ContentResolver resolver = mProviderContext.getContentResolver();
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Cursor c = resolver.query(EmailContent.Message.CONTENT_URI,
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MESSAGEID_TO_ACCOUNTID_PROJECTION, EmailContent.RECORD_ID + "=?",
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new String[] { Long.toString(messageId) }, null);
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try {
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return c.moveToFirst()
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? c.getLong(MESSAGEID_TO_ACCOUNTID_COLUMN_ACCOUNTID)
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: -1;
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} finally {
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c.close();
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}
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}
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/**
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* Delete a single message by moving it to the trash.
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*
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* This function has no callback, no result reporting, because the desired outcome
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* is reflected entirely by changes to one or more cursors.
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*
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* @param messageId The id of the message to "delete".
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* @param accountId The id of the message's account, or -1 if not known by caller
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*
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* TODO: Move out of UI thread
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* TODO: "get account a for message m" should be a utility
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* TODO: "get mailbox of type n for account a" should be a utility
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*/
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public void deleteMessage(long messageId, long accountId) {
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ContentResolver resolver = mProviderContext.getContentResolver();
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// 1. Look up acct# for message we're deleting
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Cursor c = null;
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if (accountId == -1) {
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accountId = lookupAccountForMessage(messageId);
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}
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if (accountId == -1) {
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return;
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}
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// 2. Confirm that there is a trash mailbox available
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// 3. If there's no trash mailbox, create one
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// TODO: Does this need to be signaled explicitly to the sync engines?
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long trashMailboxId = findOrCreateMailboxOfType(accountId, Mailbox.TYPE_TRASH);
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// 4. Change the mailbox key for the message we're "deleting"
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ContentValues cv = new ContentValues();
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cv.put(EmailContent.MessageColumns.MAILBOX_KEY, trashMailboxId);
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Uri uri = ContentUris.withAppendedId(EmailContent.Message.SYNCED_CONTENT_URI, messageId);
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resolver.update(uri, cv, null, null);
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// 5. Drop non-essential data for the message (e.g. attachments)
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// TODO: find the actual files (if any, if loaded) & delete them
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c = null;
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try {
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c = resolver.query(EmailContent.Attachment.CONTENT_URI,
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EmailContent.Attachment.CONTENT_PROJECTION,
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EmailContent.AttachmentColumns.MESSAGE_KEY + "=?",
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new String[] { Long.toString(messageId) }, null);
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while (c.moveToNext()) {
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// delete any associated storage
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// delete row?
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}
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} finally {
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if (c != null) c.close();
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}
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// 6. For IMAP/POP3 we may need to kick off an immediate delete (depends on acct settings)
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// TODO write this
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}
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/**
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* Set/clear the unread status of a message
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*
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* @param messageId the message to update
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* @param isRead the new value for the isRead flag
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*/
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public void setMessageRead(long messageId, boolean isRead) {
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// TODO this should not be in this thread. queue it up.
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// TODO Also, it needs to update the read/unread count in the mailbox
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// TODO kick off service/messagingcontroller actions
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ContentValues cv = new ContentValues();
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cv.put(EmailContent.MessageColumns.FLAG_READ, isRead);
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Uri uri = ContentUris.withAppendedId(
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EmailContent.Message.SYNCED_CONTENT_URI, messageId);
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mProviderContext.getContentResolver().update(uri, cv, null, null);
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}
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/**
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* Set/clear the favorite status of a message
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*
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* @param messageId the message to update
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* @param isFavorite the new value for the isFavorite flag
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*/
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public void setMessageFavorite(long messageId, boolean isFavorite) {
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// TODO this should not be in this thread. queue it up.
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// TODO kick off service/messagingcontroller actions
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ContentValues cv = new ContentValues();
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cv.put(EmailContent.MessageColumns.FLAG_FAVORITE, isFavorite);
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Uri uri = ContentUris.withAppendedId(
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EmailContent.Message.SYNCED_CONTENT_URI, messageId);
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mProviderContext.getContentResolver().update(uri, cv, null, null);
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}
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/**
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* Request that an attachment be loaded. It will be stored at a location controlled
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* by the AttachmentProvider.
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*
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* @param attachmentId the attachment to load
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* @param messageId the owner message
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* @param accountId the owner account
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* @param callback the Controller callback by which results will be reported
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*/
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public void loadAttachment(long attachmentId, long messageId, long accountId,
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final Result callback, Object tag) {
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Attachment attachInfo = Attachment.restoreAttachmentWithId(mProviderContext, attachmentId);
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File saveToFile = AttachmentProvider.getAttachmentFilename(mContext,
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accountId, attachmentId);
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// Split here for target type (Service or MessagingController)
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IEmailService service = getServiceForMessage(messageId);
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if (service != null) {
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// Service implementation
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try {
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service.loadAttachment(attachInfo.mId, saveToFile.getAbsolutePath(),
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AttachmentProvider.getAttachmentUri(accountId, attachmentId).toString(),
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new LoadAttachmentCallback(callback, tag));
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} catch (RemoteException e) {
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// TODO Change exception handling to be consistent with however this method
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// is implemented for other protocols
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Log.e("onDownloadAttachment", "RemoteException", e);
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}
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} else {
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// MessagingController implementation
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}
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}
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/**
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* For a given message id, return a service proxy if applicable, or null.
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*
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* @param messageId the message of interest
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* @result service proxy, or null if n/a
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*/
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private IEmailService getServiceForMessage(long messageId) {
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// TODO make this more efficient, caching the account, smaller lookup here, etc.
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Message message = Message.restoreMessageWithId(mProviderContext, messageId);
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long accountId = message.mAccountKey;
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Account account = EmailContent.Account.restoreAccountWithId(mProviderContext, accountId);
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if (isMessagingController(account)) {
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return null;
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} else {
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return new EmailServiceProxy(mContext, SyncManager.class);
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}
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}
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/**
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* Simple helper to determine if legacy MessagingController should be used
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*
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* TODO this should not require a full account, just an accountId
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* TODO this should use a cache because we'll be doing this a lot
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*/
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private boolean isMessagingController(EmailContent.Account account) {
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Store.StoreInfo info =
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Store.StoreInfo.getStoreInfo(account.getStoreUri(mContext), mContext);
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String scheme = info.mScheme;
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return ("pop3".equals(scheme) || "imap".equals(scheme));
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}
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/**
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* Simple callback for synchronous commands. For many commands, this can be largely ignored
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* and the result is observed via provider cursors. The callback will *not* necessarily be
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* made from the UI thread, so you may need further handlers to safely make UI updates.
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*/
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public interface Result {
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/**
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* Callback for updateMailboxList
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*
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* @param result If null, the operation completed without error
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* @param accountId The account being operated on
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*/
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public void updateMailboxListCallback(MessagingException result, long accountId);
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/**
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* Callback for updateMailbox
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*
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* @param result If null, the operation completed without error
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* @param accountId The account being operated on
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* @param mailboxId The mailbox being operated on
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*/
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public void updateMailboxCallback(MessagingException result, long accountId,
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long mailboxId, int totalMessagesInMailbox, int numNewMessages);
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/**
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* Callback for loadAttachment
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*
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* @param result if null, the attachment completed - if non-null, terminating with failure
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* @param messageId the message which contains the attachment
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* @param attachmentId the attachment being loaded
|
|
* @param progress 0 for "starting", 1..99 for updates (if needed in UI), 100 for complete
|
|
* @param tag caller-defined tag, if supplied
|
|
*/
|
|
public void loadAttachmentCallback(MessagingException result, long messageId,
|
|
long attachmentId, int progress, Object tag);
|
|
}
|
|
|
|
/**
|
|
* Support for receiving callbacks from MessagingController and dealing with UI going
|
|
* out of scope.
|
|
*/
|
|
private class LegacyListener extends MessagingListener {
|
|
Result mResultCallback;
|
|
|
|
public LegacyListener(Result callback) {
|
|
mResultCallback = callback;
|
|
}
|
|
|
|
@Override
|
|
public void listFoldersFailed(EmailContent.Account account, String message) {
|
|
if (mResultCallback != null && isActiveResultCallback(mResultCallback)) {
|
|
mResultCallback.updateMailboxListCallback(new MessagingException(message),
|
|
account.mId);
|
|
}
|
|
mLegacyController.removeListener(this);
|
|
}
|
|
|
|
@Override
|
|
public void listFoldersFinished(EmailContent.Account account) {
|
|
if (mResultCallback != null && isActiveResultCallback(mResultCallback)) {
|
|
mResultCallback.updateMailboxListCallback(null, account.mId);
|
|
}
|
|
mLegacyController.removeListener(this);
|
|
}
|
|
|
|
@Override
|
|
public void synchronizeMailboxFinished(EmailContent.Account account,
|
|
EmailContent.Mailbox folder, int totalMessagesInMailbox, int numNewMessages) {
|
|
if (mResultCallback != null && isActiveResultCallback(mResultCallback)) {
|
|
mResultCallback.updateMailboxCallback(null, account.mId, folder.mId,
|
|
totalMessagesInMailbox, numNewMessages);
|
|
}
|
|
mLegacyController.removeListener(this);
|
|
}
|
|
|
|
@Override
|
|
public void synchronizeMailboxFailed(EmailContent.Account account,
|
|
EmailContent.Mailbox folder, Exception e) {
|
|
if (mResultCallback != null && isActiveResultCallback(mResultCallback)) {
|
|
MessagingException me;
|
|
if (e instanceof MessagingException) {
|
|
me = (MessagingException) e;
|
|
} else {
|
|
me = new MessagingException(e.toString());
|
|
}
|
|
mResultCallback.updateMailboxCallback(me, account.mId, folder.mId, -1, -1);
|
|
}
|
|
mLegacyController.removeListener(this);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
/**
|
|
* Service callback for load attachment
|
|
*/
|
|
private class LoadAttachmentCallback extends IEmailServiceCallback.Stub {
|
|
|
|
private final static boolean DEBUG_FAIL_DOWNLOADS = false; // do not check in "true"
|
|
|
|
Result mCallback;
|
|
boolean mMadeFirstCallback;
|
|
Object mTag;
|
|
|
|
public LoadAttachmentCallback(Result callback, Object tag) {
|
|
super();
|
|
mCallback = callback;
|
|
mMadeFirstCallback = false;
|
|
mTag = tag;
|
|
}
|
|
|
|
/**
|
|
* Callback from Service for load attachment status.
|
|
*
|
|
* This performs some translations to what the UI expects, which is (assuming no fail):
|
|
* progress = 0 ("started")
|
|
* progress = 1..99 ("running")
|
|
* progress = 100 ("finished")
|
|
*
|
|
* @param messageId the id of the message the callback relates to
|
|
* @param attachmentId the id of the attachment (if any)
|
|
* @param statusCode from the definitions in EmailServiceStatus
|
|
* @param progress the progress (from 0 to 100) of a download
|
|
*/
|
|
public void status(long messageId, long attachmentId, int statusCode, int progress) {
|
|
if (mCallback != null && isActiveResultCallback(mCallback)) {
|
|
MessagingException result = null;
|
|
switch (statusCode) {
|
|
case EmailServiceStatus.SUCCESS:
|
|
progress = 100;
|
|
break;
|
|
case EmailServiceStatus.IN_PROGRESS:
|
|
// special case, force a single "progress = 0" for the first time
|
|
if (!mMadeFirstCallback) {
|
|
progress = 0;
|
|
mMadeFirstCallback = true;
|
|
} else if (DEBUG_FAIL_DOWNLOADS && progress > 75) {
|
|
result = new MessagingException(
|
|
String.valueOf(EmailServiceStatus.CONNECTION_ERROR));
|
|
} else if (progress <= 0 || progress >= 100) {
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
result = new MessagingException(String.valueOf(statusCode));
|
|
break;
|
|
}
|
|
mCallback.loadAttachmentCallback(result, messageId, attachmentId, progress, mTag);
|
|
// prevent any trailing reports if there was an error
|
|
if (result != null) {
|
|
mCallback = null;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|