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package dk.thoerup.traininfoservice.banedk;
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import java.net.URL;
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import java.net.URLEncoder;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import net.sf.jsr107cache.Cache;
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import net.sf.jsr107cache.CacheException;
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import net.sf.jsr107cache.CacheManager;
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import org.jsoup.nodes.Document;
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import org.jsoup.nodes.Element;
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import org.jsoup.select.Elements;
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import com.google.appengine.api.memcache.jsr107cache.GCacheFactory;
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import dk.thoerup.android.traininfo.common.DepartureBean;
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import dk.thoerup.android.traininfo.common.DepartureEntry;
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import dk.thoerup.android.traininfo.common.StationEntry;
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import dk.thoerup.circuitbreaker.CircuitBreaker;
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import dk.thoerup.circuitbreaker.CircuitBreakerManager;
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import dk.thoerup.traininfoservice.StationDAO;
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import dk.thoerup.traininfoservice.Statistics;
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public class DepartureFetcher {
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enum TrainType{
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STOG,
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REGIONAL
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}
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Cache cache;
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Logger logger = Logger.getLogger(DepartureFetcher.class.getName());
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StationDAO stationDao = new StationDAO();
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private boolean useAzureSite;
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private int replyTimeout;
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@SuppressWarnings("unchecked")
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public DepartureFetcher(boolean azureSite, int cacheTimeout, int replyTimeout) {
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this.replyTimeout = replyTimeout;
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useAzureSite = azureSite;
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Map props = new HashMap();
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props.put(GCacheFactory.EXPIRATION_DELTA_MILLIS, cacheTimeout);
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try {
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cache = CacheManager.getInstance().getCacheFactory().createCache(props);
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} catch (CacheException e) {
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logger.log(Level.WARNING, "error creating cache", e);
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}
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}
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public DepartureBean cachedLookupDepartures(int stationID, boolean arrival) throws Exception {
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final String key = "departure:" + stationID + ":" + arrival;
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DepartureBean departureBean = (DepartureBean) cache.get(key);
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if (departureBean == null) {
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departureBean = lookupDepartures(stationID,arrival);
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cache.put(key, departureBean);
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logger.info("Departure: Cache miss " + key + " !!! "); //remove before production
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} else {
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Statistics.getInstance().incrementDepartureCacheHits();
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logger.info("Departure: Cache hit " + key);
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}
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return departureBean;
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}
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public DepartureBean lookupDepartures(int stationID, boolean arrival) throws Exception {
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DepartureBean departureBean = new DepartureBean();
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StationEntry station = stationDao.getById(stationID);
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departureBean.stationName = station.getName();
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if (station.getRegional() != null) {
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DepartureBean tempBean = lookupDepartures(station.getRegional(), TrainType.REGIONAL, arrival);
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departureBean.entries.addAll( tempBean.entries );
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departureBean.notifications.addAll(tempBean.notifications);
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}
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if (station.getStrain() != null) {
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DepartureBean tempBean = lookupDepartures(station.getStrain(), TrainType.STOG, arrival);
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departureBean.entries.addAll( tempBean.entries );
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departureBean.notifications.addAll(tempBean.notifications);
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}
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if (departureBean.entries.size() == 0) {
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logger.info("No departures found for station " + stationID);
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}
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Collections.sort( departureBean.entries );
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return departureBean;
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}
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public DepartureBean lookupDepartures(String stationcode, TrainType type, boolean arrival) throws Exception {
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if (useAzureSite == true) {
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return lookupDeparturesAzureSite(stationcode, type, arrival);
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} else {
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return lookupDeparturesWwwSite(stationcode, type, arrival);
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}
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}
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private String getTypeStringAzure(TrainType type) {
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switch (type) {
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case STOG:
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return "S-Tog";
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case REGIONAL:
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return "Fjerntog";
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default:
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return ""; //Can not happen
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}
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}
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private String getTypeStringWww(TrainType type) {
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switch (type) {
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case STOG:
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return "S2";
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case REGIONAL:
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return "FJRN";
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default:
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return ""; //Can not happen
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}
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}
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public DepartureBean lookupDeparturesAzureSite(String stationcode, TrainType type, boolean arrival) throws Exception {
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DepartureBean departureBean = new DepartureBean();
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String typeString = getTypeStringAzure(type);
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String arrivalDeparture = (arrival==false) ? "Afgang" : "Ankomst";
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stationcode = URLEncoder.encode(stationcode,"ISO-8859-1");
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String uri = "http://trafikinfo.bane.dk/Trafikinformation/AfgangAnkomst/" + arrivalDeparture + "/" + stationcode + "/" + typeString + "/UdvidetVisning";
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logger.fine("URI: " + uri);
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JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), replyTimeout);
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CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
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Document page = (Document) breaker.invoke(wrapper);
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String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
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Element table = page.getElementById(tableName);
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if (table != null) {
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Elements tableRows = table.getElementsByTag("tr");
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boolean tidsstregExists = (table.getElementsByAttributeValue("class", "Tidsstreg").size() > 0);
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boolean passedTidsstreg = false;
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for (Element currentRow : tableRows) {
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String rowClass = currentRow.attr("class");
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if (tidsstregExists == true && passedTidsstreg == false) {
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if (currentRow.getElementsByAttributeValue("class", "Tidsstreg").size() > 0) {
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passedTidsstreg = true;
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} else {
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continue;
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}
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}
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if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
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Elements fields = currentRow.getElementsByTag("td");
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DepartureEntry departure = new DepartureEntry();
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String time = fields.get(0).text();
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if (time.equals(""))
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time = "0:00"; //Bane.dk bug work-around
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departure.setTime(time);
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int updated = extractUpdated( fields.get(1) );
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departure.setUpdated(updated);
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String trainNumber = fields.get(2).text();
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if (type == TrainType.STOG) //If it is S-train we need to extract the trainNumber
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trainNumber = trainNumber + " " + extractTrainNumberAzure(fields.get(2));
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departure.setTrainNumber(trainNumber);
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String destination = fields.get(3).text();
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departure.setDestination(destination);
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String origin = fields.get(4).text();
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departure.setOrigin(origin);
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String location = fields.get(5).text();
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departure.setLocation(location);
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String status = fields.get(6).text().trim();
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departure.setStatus(status);
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String note = extractNote( fields.get(7) );
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departure.setNote(note);
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departure.setType(typeString);
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departureBean.entries.add( departure );
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}
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}
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} else {
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logger.warning("No departures found for station=" + stationcode + ", type=" + type);
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}
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Element notifDiv = page.getElementById("station_planlagte_text");
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if (notifDiv != null) {
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Elements tables = notifDiv.getElementsByTag("table");
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for (Element tab : tables) {
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Elements anchors = tab.getElementsByTag("a");
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if (anchors.size() == 2) {
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departureBean.notifications.add( anchors.get(1).text() );
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}
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}
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}
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return departureBean;
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}
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public static String cleanText(String input) {
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//apparently JSoup translates characters on www.bane.dk to 0xA0
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return input.replace((char) 0xA0, (char)0x20).trim();
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}
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public DepartureBean lookupDeparturesWwwSite(String stationcode, TrainType trainType, boolean arrival) throws Exception {
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DepartureBean departureBean = new DepartureBean();
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String type = getTypeStringWww(trainType);
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stationcode = URLEncoder.encode(stationcode, "ISO-8859-1");
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String uri = "http://www.bane.dk/visStation.asp?ArtikelID=4275&W=" + type + "&S=" + stationcode;
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logger.fine("URI:" + uri);
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JsoupInvocation wrapper = new JsoupInvocation( new URL(uri), replyTimeout);
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CircuitBreaker breaker = CircuitBreakerManager.getManager().getCircuitBreaker("banedk");
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Element page = (Element) breaker.invoke(wrapper);
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String tableName = arrival == false ? "afgangtabel" : "ankomsttabel";
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Element table = page.getElementById(tableName);
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if (table != null) {
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Elements tableRows = table.getElementsByTag("tr");
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boolean passedTidsstreg = false;
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boolean tidsstregExists = (table.getElementsByAttributeValue("class", "Tidsstreg").size() > 0);
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for (Element currentRow : tableRows) {
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String rowClass = currentRow.attr("class");
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if (tidsstregExists == true && passedTidsstreg == false) {
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if (currentRow.getElementsByAttributeValue("class", "Tidsstreg").size() > 0) {
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passedTidsstreg = true;
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} else {
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continue;
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}
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}
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if (rowClass != null && rowClass.toLowerCase().contains("station") ) {
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Elements fields = currentRow.getElementsByTag("td");
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DepartureEntry departure = new DepartureEntry();
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String time = cleanText( fields.get(0).getAllElements().get(2).text() );
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if (time.equals(""))
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time = "0:00"; //Bane.dk bug work-around
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departure.setTime(time);
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int updated = extractUpdated( fields.get(1) );
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departure.setUpdated(updated);
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String trainNumber = cleanText( fields.get(2).text() );
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if (type.equalsIgnoreCase("S2")) //If it is S-train we need to extract the trainNumber
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trainNumber = trainNumber + " " + extractTrainNumberWww(fields.get(2));
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departure.setTrainNumber(trainNumber);
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String destination = cleanText( fields.get(3).text() );
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departure.setDestination(destination);
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String origin = cleanText( fields.get(4).text() );
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departure.setOrigin(origin);
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String location = cleanText( fields.get(5).text() );
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departure.setLocation(location);
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String status = cleanText( fields.get(6).text() );
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departure.setStatus(status);
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String note = cleanText( extractNote( fields.get(7) ) );
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departure.setNote(note);
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departure.setType(type);
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departureBean.entries.add(departure);
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}
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}
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} else {
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logger.warning("No departures found for station=" + stationcode + ", type=" + type);
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}
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return departureBean;
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}
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private int extractUpdated(Element updatedTd) { //extract the digit (in this case: 4) from "media/trafikinfo/opdater4.gif"
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int updated = -1;
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Elements updatedImgs = updatedTd.getElementsByTag("img");
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String updatedStr = updatedImgs.get(0).attr("src");
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if (updatedStr != null) {
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for (int i=0; i<updatedStr.length(); i++) {
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char c = updatedStr.charAt(i);
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if ( Character.isDigit(c)) {
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updated = Character.digit(c, 10);
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break;
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}
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}
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}
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return updated;
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}
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private String extractNote(Element noteTd) {
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String note = noteTd.text().trim();
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Elements elems = noteTd.getElementsByClass("bemtype");
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if (elems.size() > 0 && note.charAt(note.length()-1) == 'i')
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note = note.substring(0,note.length() -1 );
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return note.trim();
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}
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private String extractTrainNumberAzure(Element trainTd) {
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Element anchorElement = trainTd.getElementsByTag("a").get(0);
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String href = anchorElement.attr("href");
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int pos = href.lastIndexOf('/');
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String number = href.substring(pos+1);
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return number;
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}
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private String extractTrainNumberWww(Element trainTd) {
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String number = "";
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Element anchorElement = trainTd.getElementsByTag("a").get(0);
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String href = anchorElement.attr("href");
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String argstring = href.substring( href.indexOf('?') + 1);
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String args[] = argstring.split("&");
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for (String arg : args) {
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String pair[] = arg.split("="); // Key=pair[0], Value=pair[1]
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if (pair[0].equalsIgnoreCase("TogNr"))
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number = pair[1];
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}
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return number;
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}
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//test
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/*
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public static void main(String args[]) throws Exception {
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DepartureFetcher f = new DepartureFetcher();
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List<DepartureBean> deps = f.lookupDepartures("AR", "FJRN");
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for(DepartureBean d : deps) {
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System.out.println( d.getTime() + ";" + d.getUpdated() + ";" + d.getTrainNumber() + ";" +
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d.getDestination() + ";" + d.getOrigin() + ";" + d.getLocation() + ";" + d.getStatus() + ";" + d.getNote() );
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}
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System.out.println("--------------------------");
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}*/
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}
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