src/com/android/car/messenger/impl/datamodels/util/MmsUtils.java

/*
 * 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 android.provider.BaseColumns._ID;
import static android.provider.Telephony.BaseMmsColumns.CONTENT_TYPE;

import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.Telephony;
import android.provider.Telephony.Mms.Addr;
import android.provider.Telephony.Mms.Part;
import android.provider.Telephony.Sms;

import androidx.annotation.NonNull;

import java.text.MessageFormat;
import java.time.Instant;

/** MMS Utils for parsing MMS Telephony Content */
class MmsUtils {

    @NonNull public static final String FORMAT_CONTENT_MMS_PART = "content://mms/{0}/part";
    @NonNull public static final String FORMAT_CONTENT_MMS_ADDR = "content://mms/{0}/addr";
    @NonNull public static final String FORMAT_TYPE_AND_MSG_ID = "type={0} AND msg_id={1}";

    /** MMS text messages come with extra characters and new lines that need to be removed */
    @NonNull private static final String REPLACE_CHARS = "\r\n";

    private MmsUtils() {}

    @NonNull static final String MMS_CONTENT_TYPE = "application/vnd.wap.multipart.related";
    private static final int ORIGINATOR_ADDRESS_TYPE = 137;

    /** Returns true, if item on cursor position is an MMS message */
    static Boolean isMms(@NonNull Cursor cursor) {
        String contentType = cursor.getString(cursor.getColumnIndex(CONTENT_TYPE));
        return MMS_CONTENT_TYPE.equals(contentType);
    }

    /**
     * Returns the parsed result as {link @MmsSmsMessage}
     *
     * @throws IllegalArgumentException if desired columns are missing.
     * @see CursorUtils#CONTENT_CONVERSATION_PROJECTION
     */
    @NonNull
    static MmsSmsMessage parseMms(@NonNull Context context, @NonNull Cursor cursor) {
        MmsSmsMessage message = new MmsSmsMessage();
        message.mId = cursor.getString(cursor.getColumnIndex(_ID));
        message.mThreadId = cursor.getInt(cursor.getColumnIndex(Sms.THREAD_ID));
        message.mType = cursor.getInt(cursor.getColumnIndex(Telephony.Mms.MESSAGE_BOX));
        message.mSubscriptionId = cursor.getInt(cursor.getColumnIndex(Sms.SUBSCRIPTION_ID));
        message.mDate = Instant.ofEpochSecond(cursor.getLong(cursor.getColumnIndex(Sms.DATE)));
        message.mRead = cursor.getInt(cursor.getColumnIndex(Sms.READ)) == 1;
        message.mPhoneNumber = getOriginator(context, message.mId);
        message.mBody = getMmsBody(context, message.mId);
        return message;
    }

    private static String getMmsBody(@NonNull Context context, @NonNull String id) {
        String uriStr = MessageFormat.format(FORMAT_CONTENT_MMS_PART, id);
        Uri uriAddress = Uri.parse(uriStr);
        Cursor cursor = CursorUtils.simpleQuery(context, uriAddress);
        StringBuilder stringBuilder = new StringBuilder();
        while (cursor != null && cursor.moveToNext()) {
            stringBuilder.append(cursor.getString(cursor.getColumnIndex(Part.TEXT)));
            stringBuilder.append(" ");
        }
        return stringBuilder.toString().replace(REPLACE_CHARS, "");
    }

    @NonNull
    private static String getOriginator(@NonNull Context context, @NonNull String id) {
        String selection =
                MessageFormat.format(FORMAT_TYPE_AND_MSG_ID, ORIGINATOR_ADDRESS_TYPE, id);
        String uriStr = MessageFormat.format(FORMAT_CONTENT_MMS_ADDR, id);
        Cursor cursor = CursorUtils.simpleQueryWithSelection(context, Uri.parse(uriStr), selection);
        String phoneNum = "";
        if (cursor != null && cursor.moveToFirst()) {
            cursor.moveToFirst();
            phoneNum = cursor.getString(cursor.getColumnIndex(Addr.ADDRESS));
            cursor.close();
        }
        return phoneNum;
    }
}