public void handleVolunteer(String[] fields) {
// First, add a volunteer to the model when a VOLUNTEER message arrived
// from the server
String volunteerString = fields[1];
String locationString = fields[2];
int score = Integer.parseInt(fields[3]);
Log.i("VOLUNTEER: volunteer=%s location=%s score=%d", volunteerString, locationString, score);
Volunteer volunteer = model.getVolunteerByName(volunteerString);
Location location = model.getLocationByName(locationString);
if (location == null) {
Log.w("Haven't seen volunteer location %s yet", locationString);
return;
}
if (volunteer != null) model.removeVolunteer(volunteer);
volunteer = new Volunteer(model, volunteerString, score, location);
// Secondly, if the volunteer just added is "nickname", send a command
// to
// the server, whether to walk or to move.
if (volunteerString.equals(this.nickname)) {
// use nextRequest() to decide which is the best request to carry on
Request theNextRequest = nextRequest(volunteer);
// if nextRequest() can't give out a request, then move to the
// nearest location with requests
if (theNextRequest == null) {
moveToNearest(volunteer);
return;
}
// if nextRequest() gives a request at the same location with
// "nickname", then walk that requester, otherwise move to that
// requester
if (theNextRequest.getStart().equals(volunteer.getCurrentLocation())) {
String s = "walk " + theNextRequest.getName();
connector.writeLine(s);
} else {
String s = "move " + theNextRequest.getStart().getName();
connector.writeLine(s);
}
}
}
// When the request returned from nextRequest() is null, call this method to
// move to the nearest location with requests
public void moveToNearest(Volunteer volunteer) {
double min = Double.MAX_VALUE;
String building = "PMU";
for (Location location : model.getLocations()) {
if (location.getRequests().size() > 1) {
if (distance(volunteer.getCurrentLocation(), location) < min) {
min = distance(volunteer.getCurrentLocation(), location);
building = location.getName();
}
}
}
String s = "move " + building;
connector.writeLine(s);
}
