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/*
* Copyright (C) 2014 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.contacts.interactions;
import android.content.AsyncTaskLoader;
import android.content.ContentValues;
import android.content.Context;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.database.DatabaseUtils;
import android.provider.Telephony;
import android.util.Log;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Loads the most recent sms between the passed in phone numbers.
*
* This is a two part process. The first step is retrieving the threadIds for each of the phone
* numbers using fuzzy matching. The next step is to run another query against these threadIds
* to retrieve the actual sms.
*/
public class SmsInteractionsLoader extends AsyncTaskLoader<List<ContactInteraction>> {
private static final String TAG = SmsInteractionsLoader.class.getSimpleName();
private String[] mPhoneNums;
private int mMaxToRetrieve;
private List<ContactInteraction> mData;
/**
* Loads a list of SmsInteraction from the supplied phone numbers.
*/
public SmsInteractionsLoader(Context context, String[] phoneNums,
int maxToRetrieve) {
super(context);
Log.v(TAG, "SmsInteractionsLoader");
mPhoneNums = phoneNums;
mMaxToRetrieve = maxToRetrieve;
}
@Override
public List<ContactInteraction> loadInBackground() {
Log.v(TAG, "loadInBackground");
// Confirm the device has Telephony and numbers were provided before proceeding
if (!getContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_TELEPHONY)
|| mPhoneNums == null || mPhoneNums.length == 0) {
return Collections.emptyList();
}
// Retrieve the thread IDs
List<String> threadIdStrings = new ArrayList<>();
for (String phone : mPhoneNums) {
threadIdStrings.add(String.valueOf(
Telephony.Threads.getOrCreateThreadId(getContext(), phone)));
}
// Query the SMS database for the threads
Cursor cursor = getSmsCursorFromThreads(threadIdStrings);
if (cursor != null) {
try {
List<ContactInteraction> interactions = new ArrayList<>();
while (cursor.moveToNext()) {
ContentValues values = new ContentValues();
DatabaseUtils.cursorRowToContentValues(cursor, values);
interactions.add(new SmsInteraction(values));
}
return interactions;
} finally {
cursor.close();
}
}
return Collections.emptyList();
}
/**
* Return the most recent messages between a list of threads
*/
private Cursor getSmsCursorFromThreads(List<String> threadIds) {
String selection = Telephony.Sms.THREAD_ID + " IN "
+ ContactInteractionUtil.questionMarks(threadIds.size());
return getContext().getContentResolver().query(
Telephony.Sms.CONTENT_URI,
/* projection = */ null,
selection,
threadIds.toArray(new String[threadIds.size()]),
Telephony.Sms.DEFAULT_SORT_ORDER
+ " LIMIT " + mMaxToRetrieve);
}
@Override
protected void onStartLoading() {
super.onStartLoading();
if (mData != null) {
deliverResult(mData);
}
if (takeContentChanged() || mData == null) {
forceLoad();
}
}
@Override
protected void onStopLoading() {
// Attempt to cancel the current load task if possible.
cancelLoad();
}
@Override
public void deliverResult(List<ContactInteraction> data) {
mData = data;
if (isStarted()) {
super.deliverResult(data);
}
}
@Override
protected void onReset() {
super.onReset();
// Ensure the loader is stopped
onStopLoading();
if (mData != null) {
mData.clear();
}
}
}
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