ExamFragment.java

/*
 *      ____.____  __.____ ___     _____
 *     |    |    |/ _|    |   \   /  _  \ ______ ______
 *     |    |      < |    |   /  /  /_\  \\____ \\____ \
 * /\__|    |    |  \|    |  /  /    |    \  |_> >  |_> >
 * \________|____|__ \______/   \____|__  /   __/|   __/
 *                  \/                  \/|__|   |__|
 *
 * Copyright (c) 2014-2015 Paul "Marunjar" Pretsch
 *
 * 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.voidsink.anewjkuapp.fragment;

import android.content.Intent;
import android.content.UriMatcher;
import android.database.Cursor;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import org.voidsink.anewjkuapp.CourseMap;
import org.voidsink.anewjkuapp.ExamListAdapter;
import org.voidsink.anewjkuapp.ExamListExam;
import org.voidsink.anewjkuapp.KusssContentContract;
import org.voidsink.anewjkuapp.R;
import org.voidsink.anewjkuapp.analytics.Analytics;
import org.voidsink.anewjkuapp.base.BaseContentObserver;
import org.voidsink.anewjkuapp.base.BaseFragment;
import org.voidsink.anewjkuapp.base.ContentObserverListener;
import org.voidsink.anewjkuapp.update.ImportExamTask;
import org.voidsink.anewjkuapp.update.UpdateService;
import org.voidsink.anewjkuapp.utils.AppUtils;
import org.voidsink.anewjkuapp.utils.Consts;
import org.voidsink.sectionedrecycleradapter.SectionedRecyclerViewAdapter;

import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;

public class ExamFragment extends BaseFragment implements ContentObserverListener, LoaderManager.LoaderCallbacks<Cursor> {

    private static final String TAG = ExamFragment.class.getSimpleName();

    private ExamListAdapter mAdapter;
    private BaseContentObserver mDataObserver;
    private RecyclerView mRecyclerView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_recycler_view, container, false);

        mRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);

        return view;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        mAdapter = new ExamListAdapter(getContext());
        mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
        mRecyclerView.setAdapter(new SectionedRecyclerViewAdapter(mRecyclerView, mAdapter));
        //mRecyclerView.addItemDecoration(new StickyRecyclerHeadersDecoration(mAdapter));

        getLoaderManager().initLoader(0, null, this);
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
        inflater.inflate(R.menu.exam, menu);
    }

    @Override
    public void onStart() {
        super.onStart();

        UriMatcher uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
        uriMatcher.addURI(KusssContentContract.AUTHORITY,
                KusssContentContract.Exam.PATH_CONTENT_CHANGED, 0);

        mDataObserver = new BaseContentObserver(uriMatcher, this);
        getActivity().getContentResolver().registerContentObserver(
                KusssContentContract.Exam.CONTENT_CHANGED_URI, false,
                mDataObserver);
    }

    @Override
    public void onStop() {
        super.onStop();

        getActivity().getContentResolver().unregisterContentObserver(
                mDataObserver);
        mDataObserver = null;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_refresh_exams: {
                Intent mUpdateService = new Intent(getActivity(), UpdateService.class);
                mUpdateService.putExtra(Consts.ARG_UPDATE_KUSSS_EXAMS, true);
                getActivity().startService(mUpdateService);
            }
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    @Override
    protected String getScreenName() {
        return Consts.SCREEN_EXAMS;
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        showProgressIndeterminate();

        return new CursorLoader(getContext(), KusssContentContract.Exam.CONTENT_URI,
                ImportExamTask.EXAM_PROJECTION, null, null,
                KusssContentContract.Exam.COL_DTSTART + " ASC");

    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        mAdapter.clear();

        if (data != null) {
            if (AppUtils.getAccount(getContext()) != null) {
                CourseMap map = new CourseMap(getContext());
                List<ExamListExam> mExams = new ArrayList<>();

                data.moveToFirst();
                data.moveToPrevious();
                while (data.moveToNext()) {
                    try {
                        mExams.add(new ExamListExam(data, map));
                    } catch (ParseException e) {
                        Analytics.sendException(getContext(), e, false);
                    }
                }
                mAdapter.addAll(mExams);
            }
        }
        mAdapter.notifyDataSetChanged();

        finishProgress();
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        mAdapter.clear();
        mAdapter.notifyDataSetChanged();

        finishProgress();
    }

    @Override
    public void onContentChanged(boolean selfChange) {
        getLoaderManager().restartLoader(0, null, this);
    }
}