controller.PresentatieController.java Source code

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Here is the source code for controller.PresentatieController.java

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package controller;

import entity.GuestRequest;
import entity.Presentation;
import entity.Student;
import entity.TimeFrame;
import entity.User;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import model.repositories.GuestRequestRepository;
import model.repositories.PresentationRepository;
import org.json.JSONException;
import org.json.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 *
 * @author Maxim
 */
@Controller
public class PresentatieController {

    @Autowired
    private PresentationRepository presentationRepository;

    @Autowired
    private GuestRequestRepository guestRequestRepository;

    @RequestMapping(value = { "/presentatie/inschrijven" }, method = RequestMethod.POST)
    public @ResponseBody String register(@RequestBody Long id) throws JSONException {
        System.out.println(id);

        JSONObject output = new JSONObject();
        output.put("success", false);

        Presentation p = presentationRepository.findOne(id);
        if (p == null) {
            output.put("message", "Kan de presentatie niet vinden.");
            return output.toString();
        }

        //check for free spots
        if (p.getAttendees().size() == p.getLocation().getCapacity()) {
            output.put("message", "Er is geen plaats meer vrij");
            return output.toString();
        }

        //check if user is already attending presentation at this timeframe
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        User user = (User) auth.getPrincipal();

        if (!(user instanceof Student)) {
            output.put("message", "Enkel studenten kunnen zich inschrijven voor een presentatie");
            return output.toString();
        }

        Student student = (Student) user;
        HashMap<Date, List<TimeFrame>> timeframes = new HashMap<>();

        for (GuestRequest gr : student.getGuestRequests()) {
            Presentation pr = gr.getPresentation();
            if (!timeframes.containsKey(pr.getDate())) {
                timeframes.put(pr.getDate(), new ArrayList<TimeFrame>());
                timeframes.get(pr.getDate()).add(pr.getTimeFrame());
            }

            if (!timeframes.get(pr.getDate()).contains(pr.getTimeFrame())) {
                timeframes.get(pr.getDate()).add(pr.getTimeFrame());
            } else {
                output.put("message", "U heeft zich al ingeschreven voor een presentatie op hetzelfde tijdstip");
                return output.toString();
            }
        }

        GuestRequest n = new GuestRequest();
        n.setPresentation(p);
        n.setStudent(student);
        student.getGuestRequests().add(n);

        //p.getAttendees().add(student);        
        //presentationRepository.flush();

        guestRequestRepository.saveAndFlush(n);

        output.put("success", true);
        return output.toString();
    }
}