com.binary_machinery.avalonschedule.view.ScheduleActivity.java Source code

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Here is the source code for com.binary_machinery.avalonschedule.view.ScheduleActivity.java

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/*
 * Copyright 2016 Evgeny Prikhodko
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.binary_machinery.avalonschedule.view;

import android.app.PendingIntent;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;

import com.binary_machinery.avalonschedule.R;
import com.binary_machinery.avalonschedule.data.GlobalEnvironment;
import com.binary_machinery.avalonschedule.data.Schedule;
import com.binary_machinery.avalonschedule.data.ScheduleRecord;
import com.binary_machinery.avalonschedule.service.ServiceLauncher;
import com.binary_machinery.avalonschedule.tools.DbProvider;
import com.binary_machinery.avalonschedule.tools.ScheduleStorager;
import com.binary_machinery.avalonschedule.tools.ScheduleUpdater;
import com.binary_machinery.avalonschedule.utils.Constants;
import com.binary_machinery.avalonschedule.utils.Utils;
import com.binary_machinery.avalonschedule.view.schedule.SchedulePagerAdapter;

import java.util.Calendar;
import java.util.Date;
import java.util.List;

import rx.Observable;
import rx.android.schedulers.AndroidSchedulers;

public class ScheduleActivity extends AppCompatActivity {

    int m_currentWeekIdx = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_schedule);
        GlobalEnvironment env = GlobalEnvironment.getInstance();
        if (env.dbProvider == null) {
            env.dbProvider = new DbProvider(this);
        }
        List<ScheduleRecord> records = restoreScheduleFromDb();
        m_currentWeekIdx = findTodayCourse(records);
        printScheduleRecords(records);
        scrollToTodayCourse();

        Intent intent = getIntent();
        if (intent != null) {
            String message = intent.getStringExtra(Constants.MESSAGE_EXTRA);
            if (message != null) {
                Utils.showMessageDialog(this, message);
            }
        }

        SharedPreferences prefs = getSharedPreferences(Constants.PREFERENCES_NAME, MODE_PRIVATE);
        if (!prefs.contains(Constants.PREF_IS_SERVICE_ENABLED)) {
            new ServiceLauncher(this).start();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.schedule_activity_menu, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.menu_go_to_nearest_course:
            scrollToTodayCourse();
            break;
        case R.id.menu_update:
            updateSchedule();
            break;
        case R.id.menu_changes:
            showChanges();
            break;
        case R.id.menu_settings:
            showSettings();
            break;
        case R.id.menu_about:
            showAbout();
            break;
        default:
            break;
        }
        return super.onOptionsItemSelected(item);
    }

    private List<ScheduleRecord> restoreScheduleFromDb() {
        DbProvider dbProvider = GlobalEnvironment.getInstance().dbProvider;
        ScheduleStorager storager = new ScheduleStorager(dbProvider);
        Schedule schedule = storager.restoreSchedule();
        return schedule.getRecords();
    }

    private void scrollToTodayCourse() {
        ViewPager pager = (ViewPager) findViewById(R.id.schedulePager);
        pager.setCurrentItem(m_currentWeekIdx, true);
    }

    private void updateSchedule() {
        SharedPreferences prefs = getSharedPreferences(Constants.PREFERENCES_NAME, MODE_PRIVATE);
        String sourceUrl = prefs.getString(Constants.PREF_URL, "");
        Utils.showToast(this, R.string.task_loading_in_process);
        Observable.just(sourceUrl).concatMap(s -> ScheduleUpdater.get(this, s))
                .observeOn(AndroidSchedulers.mainThread()).subscribe(schedule -> {
                    List<ScheduleRecord> records = schedule.getRecords();
                    printScheduleRecords(records);
                    m_currentWeekIdx = findTodayCourse(records);
                    scrollToTodayCourse();
                }, throwable -> Utils.showMessageDialog(this,
                        getString(R.string.task_loading_failed) + ": " + throwable.getMessage()),
                        () -> Utils.showToast(this, R.string.task_loading_finished));
    }

    private void showChanges() {
        Intent settingsIntent = new Intent(this, ChangesActivity.class);
        startActivity(settingsIntent);
    }

    private void showSettings() {
        Intent settingsIntent = new Intent(this, SettingsActivity.class);
        startActivity(settingsIntent);
    }

    private void showAbout() {
        Intent settingsIntent = new Intent(this, AboutActivity.class);
        startActivity(settingsIntent);
    }

    private void printScheduleRecords(List<ScheduleRecord> records) {
        SchedulePagerAdapter adapter = new SchedulePagerAdapter(this, getSupportFragmentManager(), records);
        ViewPager pager = (ViewPager) findViewById(R.id.schedulePager);
        pager.setAdapter(adapter);

    }

    private static int findTodayCourse(List<ScheduleRecord> records) {
        if (records.isEmpty()) {
            return 0;
        }
        Calendar minDateCalendar = Calendar.getInstance();
        minDateCalendar.setTime(records.get(0).date);
        minDateCalendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
        Calendar currentTimeCalendar = Calendar.getInstance();
        return (int) ((currentTimeCalendar.getTimeInMillis() - minDateCalendar.getTimeInMillis())
                / (7 * Constants.DAY_IN_MILLISECONDS));
    }
}