org.mariotaku.twidere.loader.Twitter4JStatusLoader.java Source code

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Here is the source code for org.mariotaku.twidere.loader.Twitter4JStatusLoader.java

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/*
 *            Twidere - Twitter client for Android
 * 
 * Copyright (C) 2012 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.mariotaku.twidere.loader;

import static org.mariotaku.twidere.util.Utils.getInlineImagePreviewDisplayOptionInt;
import static org.mariotaku.twidere.util.Utils.isFiltered;

import java.util.ArrayList;
import java.util.Collections;
import java.util.ConcurrentModificationException;
import java.util.List;

import org.mariotaku.twidere.R;
import org.mariotaku.twidere.app.TwidereApplication;
import org.mariotaku.twidere.model.ParcelableStatus;
import org.mariotaku.twidere.util.CacheUsersStatusesTask;
import org.mariotaku.twidere.util.SynchronizedStateSavedList;
import org.mariotaku.twidere.util.TwitterWrapper.StatusListResponse;

import twitter4j.Paging;
import twitter4j.Status;
import twitter4j.TwitterException;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;

public abstract class Twitter4JStatusLoader extends ParcelableStatusesLoader {

    private final long mMaxId, mSinceId;
    private final boolean mHiResProfileImage;
    private final boolean mLargeInlineImagePreview;
    private final SQLiteDatabase mDatabase;

    public Twitter4JStatusLoader(final Context context, final long account_id, final long max_id,
            final long since_id, final List<ParcelableStatus> data, final String class_name,
            final boolean is_home_tab) {
        super(context, account_id, data, class_name, is_home_tab);
        mMaxId = max_id;
        mSinceId = since_id;
        mHiResProfileImage = context.getResources().getBoolean(R.bool.hires_profile_image);
        mLargeInlineImagePreview = getInlineImagePreviewDisplayOptionInt(
                context) == INLINE_IMAGE_PREVIEW_DISPLAY_OPTION_CODE_LARGE;
        mDatabase = TwidereApplication.getInstance(context).getSQLiteDatabase();
    }

    public abstract List<Status> getStatuses(Paging paging) throws TwitterException;

    @SuppressWarnings("unchecked")
    @Override
    public SynchronizedStateSavedList<ParcelableStatus, Long> loadInBackground() {
        final SynchronizedStateSavedList<ParcelableStatus, Long> data = getData();
        List<Status> statuses = null;
        final Context context = getContext();
        final SharedPreferences prefs = context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
        final int load_item_limit = prefs.getInt(PREFERENCE_KEY_LOAD_ITEM_LIMIT,
                PREFERENCE_DEFAULT_LOAD_ITEM_LIMIT);
        try {
            final Paging paging = new Paging();
            paging.setCount(load_item_limit);
            if (mMaxId > 0) {
                paging.setMaxId(mMaxId);
            }
            if (mSinceId > 0) {
                paging.setSinceId(mSinceId);
            }
            statuses = getStatuses(paging);
        } catch (final TwitterException e) {
            e.printStackTrace();
        }
        if (statuses != null) {
            final boolean insert_gap = load_item_limit == statuses.size() && data.size() > 0;
            final Status min_status = statuses.size() > 0 ? Collections.min(statuses) : null;
            final long min_status_id = min_status != null ? min_status.getId() : -1;
            if (context instanceof Activity) {
                ((Activity) context).runOnUiThread(
                        CacheUsersStatusesTask.getRunnable(context, new StatusListResponse(mAccountId, statuses)));
            }
            for (final Status status : statuses) {
                final long id = status.getId();
                deleteStatus(id);
                data.add(new ParcelableStatus(status, mAccountId,
                        min_status_id > 0 && min_status_id == id && insert_gap, mHiResProfileImage,
                        mLargeInlineImagePreview));
            }
        }
        try {
            final List<ParcelableStatus> statuses_to_remove = new ArrayList<ParcelableStatus>();
            for (final ParcelableStatus status : data) {
                if (isFiltered(mDatabase, status) && !status.is_gap) {
                    statuses_to_remove.add(status);
                }
            }
            data.removeAll(statuses_to_remove);
            Collections.sort(data);
        } catch (final ConcurrentModificationException e) {
            Log.w(LOGTAG, e);
        }
        return data;
    }

}