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/*
* Copyright (C) 2012 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.dialpad;
import static com.android.dialer.dialpad.SmartDialAdapter.LOG_TAG;
import android.os.AsyncTask;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.telephony.PhoneNumberUtils;
import android.util.Log;
import com.android.contacts.common.preference.ContactsPreferences;
import com.android.contacts.common.util.StopWatch;
import com.android.dialer.dialpad.SmartDialCache.ContactNumber;
import com.google.common.base.Objects;
import com.google.common.collect.Lists;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* This task searches through the provided cache to return the top 3 contacts(ranked by confidence)
* that match the query, then passes it back to the {@link SmartDialLoaderCallback} through a
* callback function.
*/
public class SmartDialLoaderTask extends AsyncTask<String, Integer, List<SmartDialEntry>> {
public interface SmartDialLoaderCallback {
void setSmartDialAdapterEntries(List<SmartDialEntry> list, String query);
}
static private final boolean DEBUG = false;
private static final int MAX_ENTRIES = 3;
private final SmartDialCache mContactsCache;
private final SmartDialLoaderCallback mCallback;
private final String mQuery;
/**
* See {@link ContactsPreferences#getDisplayOrder()}.
* {@link ContactsContract.Preferences#DISPLAY_ORDER_PRIMARY} (first name first)
* {@link ContactsContract.Preferences#DISPLAY_ORDER_ALTERNATIVE} (last name first)
*/
private final SmartDialNameMatcher mNameMatcher;
public SmartDialLoaderTask(SmartDialLoaderCallback callback, String query,
SmartDialCache cache) {
this.mCallback = callback;
this.mNameMatcher = new SmartDialNameMatcher(PhoneNumberUtils.normalizeNumber(query));
this.mContactsCache = cache;
this.mQuery = query;
}
@Override
protected List<SmartDialEntry> doInBackground(String... params) {
return getContactMatches();
}
@Override
protected void onPostExecute(List<SmartDialEntry> result) {
if (mCallback != null) {
mCallback.setSmartDialAdapterEntries(result, mQuery);
}
}
/**
* Loads all visible contacts with phone numbers and check if their display names match the
* query. Return at most {@link #MAX_ENTRIES} {@link SmartDialEntry}'s for the matching
* contacts.
*/
private ArrayList<SmartDialEntry> getContactMatches() {
final SmartDialTrie trie = mContactsCache.getContacts();
if (DEBUG) {
Log.d(LOG_TAG, "Size of cache: " + trie.size());
}
final StopWatch stopWatch = DEBUG ? StopWatch.start("Start Match") : null;
final ArrayList<ContactNumber> allMatches = trie.getAllWithPrefix(mNameMatcher.getQuery());
if (DEBUG) {
stopWatch.lap("Find matches");
}
// Sort matches in order of ascending contact affinity (lower is better)
Collections.sort(allMatches, new SmartDialCache.ContactAffinityComparator());
if (DEBUG) {
stopWatch.lap("Sort");
}
final Set<ContactMatch> duplicates = new HashSet<ContactMatch>();
final ArrayList<SmartDialEntry> candidates = Lists.newArrayList();
for (ContactNumber contact : allMatches) {
final ContactMatch contactMatch = new ContactMatch(contact.lookupKey, contact.id);
// Don't add multiple contact numbers from the same contact into suggestions if
// there are multiple matches. Instead, just keep the highest priority number
// instead.
if (duplicates.contains(contactMatch)) {
continue;
}
duplicates.add(contactMatch);
final boolean matches = mNameMatcher.matches(contact.displayName);
candidates.add(new SmartDialEntry(
contact.displayName,
Contacts.getLookupUri(contact.id, contact.lookupKey),
contact.phoneNumber,
mNameMatcher.getMatchPositions(),
mNameMatcher.matchesNumber(contact.phoneNumber, mNameMatcher.getQuery())
));
if (candidates.size() >= MAX_ENTRIES) {
break;
}
}
if (DEBUG) {
stopWatch.stopAndLog(LOG_TAG + " Match Complete", 0);
}
return candidates;
}
private class ContactMatch {
public final String lookupKey;
public final long id;
public ContactMatch(String lookupKey, long id) {
this.lookupKey = lookupKey;
this.id = id;
}
@Override
public int hashCode() {
return Objects.hashCode(lookupKey, id);
}
@Override
public boolean equals(Object object) {
if (this == object) {
return true;
}
if (object instanceof ContactMatch) {
ContactMatch that = (ContactMatch) object;
return Objects.equal(this.lookupKey, that.lookupKey)
&& Objects.equal(this.id, that.id);
}
return false;
}
}
}
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