org.onebusaway.gtfs_transformer.updates.ThirtyDayCalendarExtensionStrategy Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of onebusaway-gtfs-transformer Show documentation
A Java library for transforming Google Transit Feed Spec feeds
The newest version!
/**
 * Copyright (C) 2021 Cambridge Systematics, Inc.
 *
 * 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 org.onebusaway.gtfs_transformer.updates;


import org.onebusaway.gtfs.model.AgencyAndId;
import org.onebusaway.gtfs.model.IdentityBean;
import org.onebusaway.gtfs.model.ServiceCalendar;
import org.onebusaway.gtfs.model.ServiceCalendarDate;
import org.onebusaway.gtfs.model.calendar.ServiceDate;
import org.onebusaway.gtfs.services.GtfsMutableRelationalDao;
import org.onebusaway.gtfs_transformer.services.GtfsTransformStrategy;
import org.onebusaway.gtfs_transformer.services.TransformContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.*;

public class ThirtyDayCalendarExtensionStrategy implements GtfsTransformStrategy {

    private final Logger _log = LoggerFactory.getLogger(ThirtyDayCalendarExtensionStrategy.class);
    private final long milisPerDay = 24 * 60 * 60 * 1000;

    @Override
    public String getName() {
        return this.getClass().getSimpleName();
    }

    @Override
    public void run(TransformContext context, GtfsMutableRelationalDao dao) {


        // gets serviceIds for seven days ago till 31 days from now
        Map> serviceIdsByDate = getServiceIdsByDate(
                dao,
                removeTime(new Date(System.currentTimeMillis() - 7 * milisPerDay)),
                removeTime(new Date(System.currentTimeMillis() + 31 * milisPerDay)));;

       //  for the week 30 days from now, ensures there's an active calendar
       for (int i = 31; i > 24; i--){
           ensureActiveCalendar(i, serviceIdsByDate, dao);
       }

    }

    private void ensureActiveCalendar(int daysFromNow,
                                      Map> serviceIdsByDate,
                                      GtfsMutableRelationalDao dao){
        Date date = removeTime(new Date(System.currentTimeMillis() + daysFromNow * milisPerDay));
        List activeServiceIds = getLastActiveCalendar(daysFromNow,serviceIdsByDate);

        // update service ids in dao
        for (ServiceCalendar serviceId : activeServiceIds) {
            ServiceCalendar serviceCalendar = serviceId;
            serviceCalendar.setEndDate(new ServiceDate(date));
            dao.saveOrUpdateEntity(serviceCalendar);
            dao.flush();
        }

    }


    private List getLastActiveCalendar(
            int daysFromNow,
            Map> serviceIdsByDate) {
        if(daysFromNow < -7){
            return null;
        }
        Date date = removeTime(new Date(System.currentTimeMillis() + daysFromNow * milisPerDay));
        List activeServiceIds = serviceIdsByDate.get(date);
        if (activeServiceIds == null){
            activeServiceIds = getLastActiveCalendar(daysFromNow-7, serviceIdsByDate);
        }
        if(activeServiceIds!=null){
            return activeServiceIds;
        }
        return activeServiceIds;
    }
    private Date removeTime(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        date = calendar.getTime();
        return date;
    }

    private Map> getServiceIdsByDate (GtfsMutableRelationalDao dao,
                                                              Date minDate,
                                                              Date maxDate){
        Map> serviceIdsByDate = new HashMap<>();


        for(AgencyAndId serviceId : dao.getAllServiceIds()){
            //if there are no entries in calendarDates, check serviceCalendar
            ServiceCalendar servCal = dao.getCalendarForServiceId(serviceId);
            if (servCal != null) {
                //check for service using calendar
                Date start = removeTime(servCal.getStartDate().getAsDate());
                if(minDate.after(start)){start = minDate;}
                Date end = removeTime(addDays(servCal.getEndDate().getAsDate(),1));
                if (end.after(maxDate)){end = maxDate;}
                int dayIndexCounter = 0;
                Date index = removeTime(addDays(start, dayIndexCounter));
                int[] activeDays = {0,
                        servCal.getSunday(),
                        servCal.getMonday(),
                        servCal.getTuesday(),
                        servCal.getWednesday(),
                        servCal.getThursday(),
                        servCal.getFriday(),
                        servCal.getSaturday(),
                };

                while(index.before(end)){
                    Calendar calendar = Calendar.getInstance();
                    calendar.setTime(index);
                    int day = calendar.get(Calendar.DAY_OF_WEEK);
                    if(activeDays[day] == 1) {
                        if (serviceIdsByDate.get(index) == null) {
                            serviceIdsByDate.put(index, new ArrayList<>());
                        }
                        serviceIdsByDate.get(index).add(servCal);
                    }
                    dayIndexCounter += 1;
                    index = removeTime(addDays(start, dayIndexCounter));
                }
            }
        }
        return serviceIdsByDate;
    }

    private Date addDays(Date date, int daysToAdd) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.add(Calendar.DATE, daysToAdd);
        return cal.getTime();
    }
}