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BusWidget.java
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BusWidget.java
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import org.json.JSONArray;
import org.json.JSONObject;
public class BusWidget extends Widget {
private long LastUpdate = 0;
/**
* Get the web URL used to poll data for this widget
* @return the url used.
*/
String getUrl() {
return "https://bus.gov.il/WebApi/api/passengerinfo/GetRealtimeBusLineListByBustop/26290/he/false";
}
/**
* Display widget.
*/
@Override
public void display() {
long displayThresholdInSeconds = 10;
long currentTime = System.currentTimeMillis() / 1000;
if ((currentTime - this.LastUpdate) > displayThresholdInSeconds) {
this.LastUpdate = currentTime;
System.out.println("Displaying Bus!");
this.sendRequest(this.getUrl());
}
}
/**
* Get type name of the widget.
* @return type name.
*/
@Override
public String getType() {
return "WebDataPoller";
}
/**
* Given the data (json) replied from server, show it on screen.
* @param reply json retrieved from server
*/
@Override
protected void handleReply(String reply) {
this.showBusData(reply);
}
/**
* Send request of data given the url.
* @param url url used to retrieve data.
*/
@Override
protected void sendRequest(String url) {
super.sendRequest(url);
}
/**
* Show all bus data as stated on data retrieved from server.
* @param data json-type data containing all information needed.
*/
void showBusData(String data) {
JSONArray busLines = new JSONArray(data);
for (int i = 0; i < busLines.length(); i++) {
JSONObject line = busLines.getJSONObject(i);
int lineNumber = line.getInt("Shilut");
int minutes = line.getInt("MinutesToArrival");
if (minutes == 0) {
System.out.println("Bus line number " + Integer.toString(lineNumber) + " arrived to the station.\n");
} else {
System.out.println("Bus line number " + Integer.toString(lineNumber) + " will arrive in the station in "
+ Integer.toString(minutes) + " minutes.\n");
}
}
}
}