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/*
* Copyright (C) 2017 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.dialer.calllog.database;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.support.annotation.NonNull;
import android.support.annotation.WorkerThread;
import com.android.dialer.DialerPhoneNumber;
import com.android.dialer.calllog.database.contract.AnnotatedCallLogContract.AnnotatedCallLog;
import com.android.dialer.calllog.database.contract.AnnotatedCallLogContract.CoalescedAnnotatedCallLog;
import com.android.dialer.calllog.datasources.CallLogDataSource;
import com.android.dialer.calllog.datasources.DataSources;
import com.android.dialer.common.Assert;
import com.android.dialer.phonenumberproto.DialerPhoneNumberUtil;
import com.google.i18n.phonenumbers.PhoneNumberUtil;
import com.google.protobuf.InvalidProtocolBufferException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;
/**
* Coalesces call log rows by combining some adjacent rows.
*
* <p>Applies the business which logic which determines which adjacent rows should be coalasced, and
* then delegates to each data source to determine how individual columns should be aggregated.
*/
public class Coalescer {
private final DataSources dataSources;
@Inject
Coalescer(DataSources dataSources) {
this.dataSources = dataSources;
}
/**
* Reads the entire {@link AnnotatedCallLog} database into memory from the provided {@code
* allAnnotatedCallLog} parameter and then builds and returns a new {@link MatrixCursor} which is
* the result of combining adjacent rows which should be collapsed for display purposes.
*
* @param allAnnotatedCallLogRowsSortedByTimestampDesc all {@link AnnotatedCallLog} rows, sorted
* by timestamp descending
* @return a new {@link MatrixCursor} containing the {@link CoalescedAnnotatedCallLog} rows to
* display
*/
@WorkerThread
@NonNull
Cursor coalesce(@NonNull Cursor allAnnotatedCallLogRowsSortedByTimestampDesc) {
Assert.isWorkerThread();
// Note: This method relies on rowsShouldBeCombined to determine which rows should be combined,
// but delegates to data sources to actually aggregate column values.
DialerPhoneNumberUtil dialerPhoneNumberUtil =
new DialerPhoneNumberUtil(PhoneNumberUtil.getInstance());
MatrixCursor allCoalescedRowsMatrixCursor =
new MatrixCursor(
CoalescedAnnotatedCallLog.ALL_COLUMNS,
Assert.isNotNull(allAnnotatedCallLogRowsSortedByTimestampDesc).getCount());
if (allAnnotatedCallLogRowsSortedByTimestampDesc.moveToFirst()) {
int coalescedRowId = 0;
List<ContentValues> currentRowGroup = new ArrayList<>();
do {
ContentValues currentRow =
cursorRowToContentValues(allAnnotatedCallLogRowsSortedByTimestampDesc);
if (currentRowGroup.isEmpty()) {
currentRowGroup.add(currentRow);
continue;
}
ContentValues previousRow = currentRowGroup.get(currentRowGroup.size() - 1);
if (!rowsShouldBeCombined(dialerPhoneNumberUtil, previousRow, currentRow)) {
ContentValues coalescedRow = coalesceRowsForAllDataSources(currentRowGroup);
coalescedRow.put(CoalescedAnnotatedCallLog.NUMBER_CALLS, currentRowGroup.size());
addContentValuesToMatrixCursor(
coalescedRow, allCoalescedRowsMatrixCursor, coalescedRowId++);
currentRowGroup.clear();
}
currentRowGroup.add(currentRow);
} while (allAnnotatedCallLogRowsSortedByTimestampDesc.moveToNext());
// Deal with leftover rows.
ContentValues coalescedRow = coalesceRowsForAllDataSources(currentRowGroup);
coalescedRow.put(CoalescedAnnotatedCallLog.NUMBER_CALLS, currentRowGroup.size());
addContentValuesToMatrixCursor(coalescedRow, allCoalescedRowsMatrixCursor, coalescedRowId);
}
return allCoalescedRowsMatrixCursor;
}
private static ContentValues cursorRowToContentValues(Cursor cursor) {
ContentValues values = new ContentValues();
String[] columns = cursor.getColumnNames();
int length = columns.length;
for (int i = 0; i < length; i++) {
if (cursor.getType(i) == Cursor.FIELD_TYPE_BLOB) {
values.put(columns[i], cursor.getBlob(i));
} else {
values.put(columns[i], cursor.getString(i));
}
}
return values;
}
/**
* @param row1 a row from {@link AnnotatedCallLog}
* @param row2 a row from {@link AnnotatedCallLog}
*/
private static boolean rowsShouldBeCombined(
DialerPhoneNumberUtil dialerPhoneNumberUtil, ContentValues row1, ContentValues row2) {
// TODO: Real implementation.
DialerPhoneNumber number1;
DialerPhoneNumber number2;
try {
number1 = DialerPhoneNumber.parseFrom(row1.getAsByteArray(AnnotatedCallLog.NUMBER));
number2 = DialerPhoneNumber.parseFrom(row2.getAsByteArray(AnnotatedCallLog.NUMBER));
} catch (InvalidProtocolBufferException e) {
throw Assert.createAssertionFailException("error parsing DialerPhoneNumber proto", e);
}
if (!number1.hasDialerInternalPhoneNumber() && !number2.hasDialerInternalPhoneNumber()) {
// Empty numbers should not be combined.
return false;
}
if (!number1.hasDialerInternalPhoneNumber() || !number2.hasDialerInternalPhoneNumber()) {
// An empty number should not be combined with a non-empty number.
return false;
}
return dialerPhoneNumberUtil.isExactMatch(number1, number2);
}
/**
* Delegates to data sources to aggregate individual columns to create a new coalesced row.
*
* @param individualRows {@link AnnotatedCallLog} rows sorted by timestamp descending
* @return a {@link CoalescedAnnotatedCallLog} row
*/
private ContentValues coalesceRowsForAllDataSources(List<ContentValues> individualRows) {
ContentValues coalescedValues = new ContentValues();
for (CallLogDataSource dataSource : dataSources.getDataSourcesIncludingSystemCallLog()) {
coalescedValues.putAll(dataSource.coalesce(individualRows));
}
return coalescedValues;
}
/**
* @param contentValues a {@link CoalescedAnnotatedCallLog} row
* @param matrixCursor represents {@link CoalescedAnnotatedCallLog}
*/
private static void addContentValuesToMatrixCursor(
ContentValues contentValues, MatrixCursor matrixCursor, int rowId) {
MatrixCursor.RowBuilder rowBuilder = matrixCursor.newRow();
rowBuilder.add(CoalescedAnnotatedCallLog._ID, rowId);
for (Map.Entry<String, Object> entry : contentValues.valueSet()) {
rowBuilder.add(entry.getKey(), entry.getValue());
}
}
}
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