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/*
* Copyright (C) 2015 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.messaging.datamodel.action;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.text.TextUtils;
import com.android.messaging.Factory;
import com.android.messaging.datamodel.BugleDatabaseOperations;
import com.android.messaging.datamodel.BugleNotifications;
import com.android.messaging.datamodel.DataModel;
import com.android.messaging.datamodel.DataModelException;
import com.android.messaging.datamodel.DatabaseHelper;
import com.android.messaging.datamodel.DatabaseHelper.MessageColumns;
import com.android.messaging.datamodel.DatabaseWrapper;
import com.android.messaging.datamodel.MessagingContentProvider;
import com.android.messaging.sms.MmsUtils;
import com.android.messaging.util.Assert;
import com.android.messaging.util.LogUtil;
import com.android.messaging.util.NotificationsUtil;
import com.android.messaging.widget.WidgetConversationProvider;
import java.util.ArrayList;
import java.util.List;
/**
* Action used to delete a conversation.
*/
public class DeleteConversationAction extends Action implements Parcelable {
private static final String TAG = LogUtil.BUGLE_DATAMODEL_TAG;
public static void deleteConversation(final String conversationId, final long cutoffTimestamp) {
final DeleteConversationAction action = new DeleteConversationAction(conversationId,
cutoffTimestamp);
action.start();
}
private static final String KEY_CONVERSATION_ID = "conversation_id";
private static final String KEY_CUTOFF_TIMESTAMP = "cutoff_timestamp";
private DeleteConversationAction(final String conversationId, final long cutoffTimestamp) {
super();
actionParameters.putString(KEY_CONVERSATION_ID, conversationId);
// TODO: Should we set cuttoff timestamp to prevent us deleting new messages?
actionParameters.putLong(KEY_CUTOFF_TIMESTAMP, cutoffTimestamp);
}
// Delete conversation from both the local DB and telephony in the background so sync cannot
// run concurrently and incorrectly try to recreate the conversation's messages locally. The
// telephony database can sometimes be quite slow to delete conversations, so we delete from
// the local DB first, notify the UI, and then delete from telephony.
@Override
protected Bundle doBackgroundWork() throws DataModelException {
final DatabaseWrapper db = DataModel.get().getDatabase();
final String conversationId = actionParameters.getString(KEY_CONVERSATION_ID);
final long cutoffTimestamp = actionParameters.getLong(KEY_CUTOFF_TIMESTAMP);
if (!TextUtils.isEmpty(conversationId)) {
// First find the thread id for this conversation.
final long threadId = BugleDatabaseOperations.getThreadId(db, conversationId);
if (BugleDatabaseOperations.deleteConversation(db, conversationId, cutoffTimestamp)) {
LogUtil.i(TAG, "DeleteConversationAction: Deleted local conversation "
+ conversationId);
BugleActionToasts.onConversationDeleted();
// Remove notifications if necessary
BugleNotifications.update(true /* silent */, null /* conversationId */,
BugleNotifications.UPDATE_MESSAGES);
// We have changed the conversation list
MessagingContentProvider.notifyConversationListChanged();
// Notify the widget the conversation is deleted so it can go into its configure state.
WidgetConversationProvider.notifyConversationDeleted(
Factory.get().getApplicationContext(),
conversationId);
} else {
LogUtil.w(TAG, "DeleteConversationAction: Could not delete local conversation "
+ conversationId);
return null;
}
// Now delete from telephony DB. MmsSmsProvider throws an exception if the thread id is
// less than 0. If it's greater than zero, it will delete all messages with that thread
// id, even if there's no corresponding row in the threads table.
if (threadId >= 0) {
final int count = MmsUtils.deleteThread(threadId, cutoffTimestamp);
if (count > 0) {
LogUtil.i(TAG, "DeleteConversationAction: Deleted telephony thread "
+ threadId + " (cutoffTimestamp = " + cutoffTimestamp + ")");
} else {
LogUtil.w(TAG, "DeleteConversationAction: Could not delete thread from "
+ "telephony: conversationId = " + conversationId + ", thread id = "
+ threadId);
}
} else {
LogUtil.w(TAG, "DeleteConversationAction: Local conversation " + conversationId
+ " has an invalid telephony thread id; will delete messages individually");
deleteConversationMessagesFromTelephony();
}
// Finally, remove the conversation specific notification channel
NotificationsUtil.deleteNotificationChannel(Factory.get().getApplicationContext(),
conversationId);
} else {
LogUtil.e(TAG, "DeleteConversationAction: conversationId is empty");
}
return null;
}
/**
* Deletes all the telephony messages for the local conversation being deleted.
* <p>
* This is a fallback used when the conversation is not associated with any telephony thread,
* or its thread id is invalid (e.g. negative). This is not common, but can happen sometimes
* (e.g. the Unknown Sender conversation). In the usual case of deleting a conversation, we
* don't need this because the telephony provider automatically deletes messages when a thread
* is deleted.
*/
private void deleteConversationMessagesFromTelephony() {
final DatabaseWrapper db = DataModel.get().getDatabase();
final String conversationId = actionParameters.getString(KEY_CONVERSATION_ID);
Assert.notNull(conversationId);
final List<Uri> messageUris = new ArrayList<>();
Cursor cursor = null;
try {
cursor = db.query(DatabaseHelper.MESSAGES_TABLE,
new String[] { MessageColumns.SMS_MESSAGE_URI },
MessageColumns.CONVERSATION_ID + "=?",
new String[] { conversationId },
null, null, null);
while (cursor.moveToNext()) {
String messageUri = cursor.getString(0);
try {
messageUris.add(Uri.parse(messageUri));
} catch (Exception e) {
LogUtil.e(TAG, "DeleteConversationAction: Could not parse message uri "
+ messageUri);
}
}
} finally {
if (cursor != null) {
cursor.close();
}
}
for (Uri messageUri : messageUris) {
int count = MmsUtils.deleteMessage(messageUri);
if (count > 0) {
if (LogUtil.isLoggable(TAG, LogUtil.DEBUG)) {
LogUtil.d(TAG, "DeleteConversationAction: Deleted telephony message "
+ messageUri);
}
} else {
LogUtil.w(TAG, "DeleteConversationAction: Could not delete telephony message "
+ messageUri);
}
}
}
@Override
protected Object executeAction() {
requestBackgroundWork();
return null;
}
private DeleteConversationAction(final Parcel in) {
super(in);
}
public static final Parcelable.Creator<DeleteConversationAction> CREATOR
= new Parcelable.Creator<DeleteConversationAction>() {
@Override
public DeleteConversationAction createFromParcel(final Parcel in) {
return new DeleteConversationAction(in);
}
@Override
public DeleteConversationAction[] newArray(final int size) {
return new DeleteConversationAction[size];
}
};
@Override
public void writeToParcel(final Parcel parcel, final int flags) {
writeActionToParcel(parcel, flags);
}
}
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