Twidere-App-Android-Twitter-Mastodon/twidere/src/main/java/org/mariotaku/twidere/fragment/support/TrendsSuggestionsFragment.java

/*
 * 				Twidere - 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.mariotaku.twidere.fragment.support;

import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

import com.squareup.otto.Bus;
import com.squareup.otto.Subscribe;

import org.mariotaku.twidere.adapter.TrendsAdapter;
import org.mariotaku.twidere.app.TwidereApplication;
import org.mariotaku.twidere.provider.TwidereDataStore.CachedTrends;
import org.mariotaku.twidere.util.AsyncTwitterWrapper;
import org.mariotaku.twidere.util.MultiSelectManager;
import org.mariotaku.twidere.util.message.TaskStateChangedEvent;

import static org.mariotaku.twidere.util.Utils.getDefaultAccountId;
import static org.mariotaku.twidere.util.Utils.getTableNameByUri;
import static org.mariotaku.twidere.util.Utils.openTweetSearch;

public class TrendsSuggestionsFragment extends AbsContentListViewFragment<TrendsAdapter>
        implements LoaderCallbacks<Cursor>, AdapterView.OnItemClickListener {

    private MultiSelectManager mMultiSelectManager;
    private SharedPreferences mPreferences;


    private long mAccountId;

    @Override
    public void onActivityCreated(final Bundle savedInstanceState) {
        mPreferences = getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
        super.onActivityCreated(savedInstanceState);
        mMultiSelectManager = getMultiSelectManager();
        mAccountId = getDefaultAccountId(getActivity());
        getListView().setOnItemClickListener(this);
        getLoaderManager().initLoader(0, null, this);
        showProgress();
    }

    @NonNull
    @Override
    protected TrendsAdapter onCreateAdapter(Context context, boolean compact) {
        return new TrendsAdapter(getActivity());
    }

    @Override
    public Loader<Cursor> onCreateLoader(final int id, final Bundle args) {
        final Uri uri = CachedTrends.Local.CONTENT_URI;
        final String table = getTableNameByUri(uri);
        final String where = table != null ? CachedTrends.TIMESTAMP + " = " + "(SELECT " + CachedTrends.TIMESTAMP
                + " FROM " + table + " ORDER BY " + CachedTrends.TIMESTAMP + " DESC LIMIT 1)" : null;
        return new CursorLoader(getActivity(), uri, CachedTrends.COLUMNS, where, null, null);
    }

    @Override
    public void onItemClick(final AdapterView<?> view, final View child, final int position, final long id) {
        if (mMultiSelectManager.isActive()) return;
        final String trend;
        if (view instanceof ListView) {
            trend = getAdapter().getItem(position - ((ListView) view).getHeaderViewsCount());
        } else {
            trend = getAdapter().getItem(position);

        }
        if (trend == null) return;
        openTweetSearch(getActivity(), mAccountId, trend);
    }

    @Override
    public void onLoaderReset(final Loader<Cursor> loader) {
        getAdapter().swapCursor(null);
    }

    @Override
    public void onLoadFinished(final Loader<Cursor> loader, final Cursor cursor) {
        getAdapter().swapCursor(cursor);
        showContent();
    }

    @Override
    public void onRefresh() {
        if (isRefreshing()) return;
        final AsyncTwitterWrapper twitter = mTwitterWrapper;
        if (twitter == null) return;
        twitter.getLocalTrendsAsync(mAccountId, mPreferences.getInt(KEY_LOCAL_TRENDS_WOEID, 1));
    }

    @Override
    public boolean isRefreshing() {
        return false;
    }

    @Override
    public void onStart() {
        super.onStart();
        getLoaderManager().restartLoader(0, null, this);
        final Bus bus = TwidereApplication.getInstance(getActivity()).getMessageBus();
        assert bus != null;
        bus.register(this);
    }

    @Override
    public void onStop() {
        final Bus bus = TwidereApplication.getInstance(getActivity()).getMessageBus();
        assert bus != null;
        bus.unregister(this);
        super.onStop();
    }

    @Subscribe
    public void notifyTaskStateChanged(TaskStateChangedEvent event) {
        updateRefreshState();
    }

    protected void updateRefreshState() {
        final AsyncTwitterWrapper twitter = mTwitterWrapper;
        if (twitter == null || !getUserVisibleHint()) return;
        setRefreshing(twitter.isLocalTrendsRefreshing());
    }

}