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/*
* Copyright (C) 2020 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.car.messenger.impl.datamodels.util;
import static com.android.car.messenger.common.Conversation.Message.MessageStatus.MESSAGE_STATUS_NONE;
import static com.android.car.messenger.common.Conversation.Message.MessageStatus.MESSAGE_STATUS_READ;
import static com.android.car.messenger.common.Conversation.Message.MessageStatus.MESSAGE_STATUS_UNREAD;
import static java.lang.Math.min;
import static java.util.Comparator.comparingLong;
import android.content.Context;
import android.database.Cursor;
import android.provider.Telephony.TextBasedSmsColumns;
import android.util.Pair;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.app.Person;
import com.android.car.messenger.common.Conversation;
import com.android.car.messenger.common.Conversation.Message;
import com.android.car.messenger.common.Conversation.Message.MessageStatus;
import com.android.car.messenger.common.Conversation.Message.MessageType;
import com.android.car.messenger.core.interfaces.AppFactory;
import com.android.car.messenger.core.util.L;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Function;
/** Message Parser that provides useful static methods to parse 1-1 and Group MMS messages. */
public final class MessageUtils {
/**
* Returns all messages in the given cursors.
*
* @param limit The maximum number of messages
* @param messageCursors The messageCursors of messages in descending order
*/
@NonNull
public static List<Message> getMessages(int limit, @Nullable Cursor... messageCursors) {
List<Message> messages = new ArrayList<>();
for (Cursor cursor : messageCursors) {
MessageUtils.forEachDesc(
cursor,
message -> {
messages.add(message);
return true;
});
}
messages.sort(comparingLong(Message::getTimestamp).reversed());
return messages.subList(0, min(limit, messages.size()));
}
/**
* Returns unread messages from a conversation, in ascending order.
*
* @param messages The messages in descending order
*/
@NonNull
public static List<Message> getUnreadMessages(@NonNull List<Message> messages) {
int i = 0;
for (Conversation.Message message : messages) {
if (message.getMessageStatus() != MessageStatus.MESSAGE_STATUS_UNREAD) {
break;
}
i++;
}
List<Message> unreadMessages = messages.subList(0, i);
unreadMessages.sort(comparingLong(Conversation.Message::getTimestamp));
return unreadMessages;
}
/**
* Gets Read Messages and Last Reply
*
* @param messages List of messages in descending order
*/
@NonNull
public static Pair<List<Message>, Message> getReadMessagesAndReplyTimestamp(
@Nullable List<Message> messages) {
List<Message> readMessages = new ArrayList<>();
AtomicReference<Message> replyMessage = new AtomicReference<>();
AtomicReference<Long> lastReply = new AtomicReference<>(0L);
for (Message message : messages) {
// Desired impact: 4. Reply -> 3. Messages -> 2. Reply -> 1 Messages (stop
// parsing at 2.)
// lastReply references 4., messages references 3.
// Desired impact: 3. Messages -> 2. Reply -> 1. Messages (stop parsing at 2.)
// lastReply references 2., messages references 3.
int messageStatus = message.getMessageStatus();
if (message.getMessageType() == MessageType.MESSAGE_TYPE_SENT) {
if (lastReply.get() < message.getTimestamp()) {
lastReply.set(message.getTimestamp());
replyMessage.set(message);
}
if (!readMessages.isEmpty()) {
break;
}
} else if (messageStatus == MessageStatus.MESSAGE_STATUS_READ
|| messageStatus == MessageStatus.MESSAGE_STATUS_NONE) {
readMessages.add(message);
} else {
break;
}
}
readMessages.sort(comparingLong(Message::getTimestamp));
return new Pair<>(readMessages, replyMessage.get());
}
/**
* Parses each message in the cursor and returns the item for further processing
*
* @param messageCursor The message cursor to be parsed for SMS and MMS messages
* @param processor A consumer that takes in the {@link Message} and returns true for the method
* to continue parsing the cursor or false to return.
*/
private static void forEachDesc(
@Nullable Cursor messageCursor, @NonNull Function<Message, Boolean> processor) {
if (messageCursor == null || !messageCursor.moveToFirst()) {
return;
}
Context context = AppFactory.get().getContext();
boolean moveToNext = true;
boolean hasBeenRepliedTo = false;
do {
Message message;
try {
message = parseMessageAtPoint(context, messageCursor, hasBeenRepliedTo);
} catch (IllegalArgumentException e) {
e.printStackTrace();
L.d("Message was not able to be parsed. Skipping.");
continue;
}
if (message.getText().trim().isEmpty()) {
// There are occasions where a user may send
// a text message plus an image or audio and
// bluetooth will post two messages to the database (b/182834412),
// one with a text and one blank
// This leads to boomerang notifications, one with text and one that is empty.
// Validating or removing messages when blank is a mitigation on our end.
L.d("Message is blank. Skipped. ");
continue;
}
if (message.getMessageType() == MessageType.MESSAGE_TYPE_SENT) {
hasBeenRepliedTo = true;
}
moveToNext = processor.apply(message);
} while (messageCursor.moveToNext() && moveToNext);
}
/**
* Parses message at the point in cursor.
*
* @throws IllegalArgumentException if desired columns are missing.
* @see CursorUtils#CONTENT_CONVERSATION_PROJECTION
*/
@NonNull
private static Conversation.Message parseMessageAtPoint(
@NonNull Context context, @NonNull Cursor cursor, boolean userHasReplied) {
MmsSmsMessage msg =
MmsUtils.isMms(cursor)
? MmsUtils.parseMms(context, cursor)
: SmsUtils.parseSms(cursor);
Person person =
ContactUtils.getPerson(context, msg.mPhoneNumber, /* processParticipant= */ null);
Conversation.Message message =
new Conversation.Message(msg.mBody, msg.mDate.toEpochMilli(), person);
if (msg.mType == TextBasedSmsColumns.MESSAGE_TYPE_SENT) {
message.setMessageType(MessageType.MESSAGE_TYPE_SENT);
message.setMessageStatus(MESSAGE_STATUS_NONE);
} else {
int status =
(msg.mRead || userHasReplied) ? MESSAGE_STATUS_READ : MESSAGE_STATUS_UNREAD;
message.setMessageType(MessageType.MESSAGE_TYPE_INBOX);
message.setMessageStatus(status);
}
return message;
}
private MessageUtils() {}
}
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