248 lines
9.3 KiB
Java
248 lines
9.3 KiB
Java
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.loader.support;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.database.sqlite.SQLiteDatabase;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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import android.util.Log;
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import com.bluelinelabs.logansquare.LoganSquare;
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import com.nostra13.universalimageloader.cache.disc.DiskCache;
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import org.apache.commons.lang3.ArrayUtils;
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import org.mariotaku.twidere.api.twitter.Twitter;
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import org.mariotaku.twidere.api.twitter.TwitterException;
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import org.mariotaku.twidere.api.twitter.model.Paging;
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import org.mariotaku.twidere.api.twitter.model.Status;
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import org.mariotaku.twidere.app.TwidereApplication;
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import org.mariotaku.twidere.model.ListResponse;
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import org.mariotaku.twidere.model.ParcelableStatus;
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import org.mariotaku.twidere.util.JsonSerializer;
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import org.mariotaku.twidere.util.SharedPreferencesWrapper;
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import org.mariotaku.twidere.util.TwidereArrayUtils;
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import org.mariotaku.twidere.util.TwitterAPIFactory;
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import org.mariotaku.twidere.util.TwitterContentUtils;
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import org.mariotaku.twidere.util.dagger.GeneralComponentHelper;
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import java.io.File;
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import java.io.IOException;
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import java.io.PipedInputStream;
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import java.io.PipedOutputStream;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import java.util.concurrent.CopyOnWriteArrayList;
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import javax.inject.Inject;
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public abstract class TwitterAPIStatusesLoader extends ParcelableStatusesLoader {
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private final long mAccountId;
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private final long mMaxId, mSinceId;
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@Nullable
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private final Object[] mSavedStatusesFileArgs;
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private Comparator<ParcelableStatus> mComparator;
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@Inject
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DiskCache mFileCache;
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@Inject
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SharedPreferencesWrapper mPreferences;
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public TwitterAPIStatusesLoader(final Context context, final long accountId, final long sinceId,
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final long maxId, final List<ParcelableStatus> data,
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@Nullable final String[] savedStatusesArgs, final int tabPosition, boolean fromUser) {
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super(context, data, tabPosition, fromUser);
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GeneralComponentHelper.build(context).inject(this);
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mAccountId = accountId;
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mMaxId = maxId;
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mSinceId = sinceId;
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mSavedStatusesFileArgs = savedStatusesArgs;
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}
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@SuppressWarnings("unchecked")
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@Override
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public final ListResponse<ParcelableStatus> loadInBackground() {
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List<ParcelableStatus> data = getData();
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if (data == null) {
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data = new CopyOnWriteArrayList<>();
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}
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if (isFirstLoad() && getTabPosition() >= 0) {
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final List<ParcelableStatus> cached = getCachedData();
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if (cached != null) {
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data.addAll(cached);
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if (mComparator != null) {
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Collections.sort(data, mComparator);
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} else {
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Collections.sort(data);
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}
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return ListResponse.getListInstance(new CopyOnWriteArrayList<>(data));
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}
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}
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if (!isFromUser()) return ListResponse.getListInstance(data);
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final Twitter twitter = getTwitter();
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if (twitter == null) return null;
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final List<Status> statuses;
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final Context context = getContext();
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final SharedPreferences prefs = context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
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final int loadItemLimit = prefs.getInt(KEY_LOAD_ITEM_LIMIT, DEFAULT_LOAD_ITEM_LIMIT);
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final boolean noItemsBefore = data.isEmpty();
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try {
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final Paging paging = new Paging();
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paging.setCount(loadItemLimit);
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if (mMaxId > 0) {
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paging.setMaxId(mMaxId);
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}
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if (mSinceId > 0) {
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paging.setSinceId(mSinceId);
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if (mMaxId <= 0) {
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paging.setLatestResults(true);
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}
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}
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statuses = getStatuses(twitter, paging);
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if (!TwitterAPIFactory.isOfficialTwitterInstance(context, twitter)) {
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TwitterContentUtils.getStatusesWithQuoteData(twitter, statuses);
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}
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} catch (final TwitterException e) {
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// mHandler.post(new ShowErrorRunnable(e));
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Log.w(LOGTAG, e);
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return ListResponse.getListInstance(new CopyOnWriteArrayList<>(data), e);
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}
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final long[] statusIds = new long[statuses.size()];
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long minId = -1;
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int minIdx = -1;
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int rowsDeleted = 0;
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for (int i = 0, j = statuses.size(); i < j; i++) {
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final Status status = statuses.get(i);
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final long id = status.getId();
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if (minId == -1 || id < minId) {
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minId = id;
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minIdx = i;
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}
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statusIds[i] = id;
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if (deleteStatus(data, status.getId())) {
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rowsDeleted++;
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}
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}
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// Insert a gap.
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final boolean deletedOldGap = rowsDeleted > 0 && ArrayUtils.contains(statusIds, mMaxId);
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final boolean noRowsDeleted = rowsDeleted == 0;
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final boolean insertGap = minId > 0 && (noRowsDeleted || deletedOldGap) && !noItemsBefore
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&& statuses.size() >= loadItemLimit;
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for (int i = 0, j = statuses.size(); i < j; i++) {
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final Status status = statuses.get(i);
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data.add(new ParcelableStatus(status, mAccountId, insertGap && isGapEnabled() && minIdx == i));
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}
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final SQLiteDatabase db = TwidereApplication.getInstance(context).getSQLiteDatabase();
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final ParcelableStatus[] array = data.toArray(new ParcelableStatus[data.size()]);
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for (int i = 0, size = array.length; i < size; i++) {
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final ParcelableStatus status = array[i];
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if (shouldFilterStatus(db, status) && !status.is_gap && i != size - 1) {
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deleteStatus(data, status.id);
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}
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}
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if (mComparator != null) {
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Collections.sort(data, mComparator);
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} else {
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Collections.sort(data);
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}
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saveCachedData(data);
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return ListResponse.getListInstance(new CopyOnWriteArrayList<>(data));
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}
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public final void setComparator(Comparator<ParcelableStatus> comparator) {
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mComparator = comparator;
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}
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public long getSinceId() {
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return mSinceId;
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}
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public long getMaxId() {
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return mMaxId;
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}
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public long getAccountId() {
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return mAccountId;
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}
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@NonNull
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protected abstract List<Status> getStatuses(@NonNull Twitter twitter, Paging paging) throws TwitterException;
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@Nullable
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protected final Twitter getTwitter() {
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return TwitterAPIFactory.getTwitterInstance(getContext(), mAccountId, true, true);
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}
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protected abstract boolean shouldFilterStatus(final SQLiteDatabase database, final ParcelableStatus status);
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protected boolean isGapEnabled() {
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return true;
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}
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private List<ParcelableStatus> getCachedData() {
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final String key = getSerializationKey();
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if (key == null) return null;
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final File file = mFileCache.get(key);
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if (file == null) return null;
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try {
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return JsonSerializer.parseList(file, ParcelableStatus.class);
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} catch (final IOException e) {
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// Ignore
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}
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return null;
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}
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private String getSerializationKey() {
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if (mSavedStatusesFileArgs == null) return null;
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return TwidereArrayUtils.toString(mSavedStatusesFileArgs, '_', false);
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}
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private void saveCachedData(final List<ParcelableStatus> data) {
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final String key = getSerializationKey();
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if (key == null || data == null) return;
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final int databaseItemLimit = mPreferences.getInt(KEY_DATABASE_ITEM_LIMIT, DEFAULT_DATABASE_ITEM_LIMIT);
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try {
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final List<ParcelableStatus> statuses = data.subList(0, Math.min(databaseItemLimit, data.size()));
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final PipedOutputStream pos = new PipedOutputStream();
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final PipedInputStream pis = new PipedInputStream(pos);
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new Thread(new Runnable() {
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@Override
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public void run() {
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try {
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LoganSquare.mapperFor(ParcelableStatus.class).serialize(statuses, pos);
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}).start();
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mFileCache.save(key, pis, null);
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} catch (final IOException e) {
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// Ignore
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}
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}
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}
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