/*
* Firetweet - Twitter client for Android
*
* Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.getlantern.firetweet.loader.support;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.sqlite.SQLiteDatabase;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Log;
import org.getlantern.jsonserializer.JSONFileIO;
import org.getlantern.firetweet.app.FiretweetApplication;
import org.getlantern.firetweet.model.ParcelableStatus;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import twitter4j.Paging;
import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import static org.getlantern.firetweet.util.Utils.getTwitterInstance;
import static org.getlantern.firetweet.util.Utils.truncateStatuses;
public abstract class TwitterAPIStatusesLoader extends ParcelableStatusesLoader {
private final Context mContext;
private final long mAccountId;
private final long mMaxId, mSinceId;
private final SQLiteDatabase mDatabase;
private final Object[] mSavedStatusesFileArgs;
private Comparator<ParcelableStatus> mComparator;
public TwitterAPIStatusesLoader(final Context context, final long accountId, final long sinceId,
final long maxId, final List<ParcelableStatus> data,
final String[] savedStatusesArgs, final int tabPosition, boolean fromUser) {
super(context, data, tabPosition, fromUser);
mContext = context;
mAccountId = accountId;
mMaxId = maxId;
mSinceId = sinceId;
mDatabase = FiretweetApplication.getInstance(context).getSQLiteDatabase();
mSavedStatusesFileArgs = savedStatusesArgs;
}
@SuppressWarnings("unchecked")
@Override
public final List<ParcelableStatus> loadInBackground() {
final File serializationFile = getSerializationFile();
final List<ParcelableStatus> data = getData();
if (isFirstLoad() && getTabPosition() >= 0 && serializationFile != null) {
final List<ParcelableStatus> cached = getCachedData(serializationFile);
if (cached != null) {
data.addAll(cached);
if (mComparator != null) {
Collections.sort(data, mComparator);
} else {
Collections.sort(data);
}
return new CopyOnWriteArrayList<>(data);
}
}
if (!isFromUser()) return data;
final List<Status> statuses;
final boolean truncated;
final Context context = getContext();
final SharedPreferences prefs = context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
final int loadItemLimit = prefs.getInt(KEY_LOAD_ITEM_LIMIT, DEFAULT_LOAD_ITEM_LIMIT);
try {
final Paging paging = new Paging();
paging.setCount(loadItemLimit);
if (mMaxId > 0) {
paging.setMaxId(mMaxId);
}
if (mSinceId > 0) {
paging.setSinceId(mSinceId - 1);
}
statuses = new ArrayList<>();
final Twitter twitter = getTwitter();
if (twitter == null) {
throw new TwitterException("Account is null");
}
truncated = truncateStatuses(getStatuses(twitter, paging), statuses, mSinceId);
} catch (final TwitterException e) {
// mHandler.post(new ShowErrorRunnable(e));
Log.w(LOGTAG, e);
return new CopyOnWriteArrayList<>(data);
}
final long minStatusId = statuses.isEmpty() ? -1 : Collections.min(statuses).getId();
final boolean insertGap = minStatusId > 0 && statuses.size() > 1 && !data.isEmpty() && !truncated;
for (final Status status : statuses) {
final long id = status.getId();
final boolean deleted = deleteStatus(data, id);
data.add(new ParcelableStatus(status, mAccountId, minStatusId == id && insertGap && !deleted));
}
final ParcelableStatus[] array = data.toArray(new ParcelableStatus[data.size()]);
for (int i = 0, size = array.length; i < size; i++) {
final ParcelableStatus status = array[i];
if (shouldFilterStatus(mDatabase, status) && !status.is_gap && i != size - 1) {
deleteStatus(data, status.id);
}
}
if (mComparator != null) {
Collections.sort(data, mComparator);
} else {
Collections.sort(data);
}
saveCachedData(serializationFile, data);
return new CopyOnWriteArrayList<>(data);
}
public final void setComparator(Comparator<ParcelableStatus> comparator) {
mComparator = comparator;
}
@NonNull
protected abstract List<Status> getStatuses(@NonNull Twitter twitter, Paging paging) throws TwitterException;
@Nullable
protected final Twitter getTwitter() {
return getTwitterInstance(mContext, mAccountId, true, true);
}
protected abstract boolean shouldFilterStatus(final SQLiteDatabase database, final ParcelableStatus status);
private List<ParcelableStatus> getCachedData(final File file) {
if (file == null) return null;
try {
return JSONFileIO.readArrayList(file);
} catch (final IOException e) {
e.printStackTrace();
}
return null;
}
private File getSerializationFile() {
if (mSavedStatusesFileArgs == null) return null;
try {
return JSONFileIO.getSerializationFile(mContext, mSavedStatusesFileArgs);
} catch (final IOException e) {
e.printStackTrace();
}
return null;
}
private void saveCachedData(final File file, final List<ParcelableStatus> data) {
if (file == null || data == null) return;
final SharedPreferences prefs = mContext.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
final int databaseItemLimit = prefs.getInt(KEY_DATABASE_ITEM_LIMIT, DEFAULT_DATABASE_ITEM_LIMIT);
try {
final List<ParcelableStatus> activities = data.subList(0, Math.min(databaseItemLimit, data.size()));
JSONFileIO.writeArray(file, activities.toArray(new ParcelableStatus[activities.size()]));
} catch (final IOException e) {
e.printStackTrace();
}
}
}