package com.example.java_testverbesserung_kerschbaumer;

import jakarta.servlet.*;
import jakarta.servlet.http.*;
import jakarta.servlet.annotation.*;
import model.DataStore;

import java.io.IOException;
import java.util.UUID;

@WebServlet(name = "AbsencesServlet", value = "/AbsencesServlet")
public class AbsencesServlet extends HttpServlet {
    private DataStore dataStore = DataStore.getInstance();

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setAttribute("absences", dataStore.getPupilById(UUID.fromString(request.getParameter("pupils"))).getAbsences());
        request.getRequestDispatcher("absences.jsp").forward(request, response);
    }
}
/////////////////////////////////////////////////////////////////
package com.example.java_testverbesserung_kerschbaumer;

import jakarta.ws.rs.ApplicationPath;
import jakarta.ws.rs.core.Application;

@ApplicationPath("/api")
public class HelloApplication extends Application {

}
/////////////////////////////////////////////////////////////////
package com.example.java_testverbesserung_kerschbaumer;

import jakarta.servlet.*;
import jakarta.servlet.http.*;
import jakarta.servlet.annotation.*;
import model.DataStore;

import java.io.IOException;

@WebServlet(name = "PupilsServlet", value = "/PupilsServlet")
public class PupilsServlet extends HttpServlet {
    DataStore dataStore = DataStore.getInstance();

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setAttribute("pupils", dataStore.getPupils());
        request.getRequestDispatcher("pupils.jsp").forward(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }
}
/////////////////////////////////////////////////////////////////
package common;

import jakarta.ws.rs.Consumes;
import jakarta.ws.rs.POST;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.MediaType;
import model.Pupil;
import java.util.Set;

@Path("/importData")
public interface IDataResource {

    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public Set<Pupil> importData(Set<Pupil> pupils);
}
/////////////////////////////////////////////////////////////////
package common;

import jakarta.ws.rs.*;
import jakarta.ws.rs.core.MediaType;
import model.Absence;

@Path("/pupil")
public interface IPupilResource {

    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @Path("{pupil_id}/absence")
    public Absence addAbsence(@PathParam("pupil_id") String pupil_id, Absence absence);

    @GET
    @Consumes(MediaType.APPLICATION_JSON)
    @Path("{pupil_id}/absence/{absence_id}")
    public Absence getAbsenceByID(@PathParam("pupil_id") String pupil_id, @PathParam("absence_id") String absence_id);

    @PUT
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @Path("{pupil_id}/absence/{absence_id}/excuse")
    public Absence excuseAbsence(@PathParam("pupil_id") String pupil_id, @PathParam("absence_id") String absence_id);

}
/////////////////////////////////////////////////////////////////
package model;

import java.time.LocalDate;
import java.util.UUID;

public class Absence {
    private UUID id;
    private LocalDate from;
    private LocalDate to;
    private String reason;
    private boolean excused;

    public Absence() {
        id = UUID.randomUUID();
    }

    public Absence(UUID id, LocalDate from, LocalDate to, String reason) {
        this.id = id;
        this.from = from;
        this.to = to;
        this.reason = reason;
    }

    public UUID getId() {
        return id;
    }

    public LocalDate getFrom() {
        return from;
    }

    public LocalDate getTo() {
        return to;
    }

    public String getReason() {
        return reason;
    }

    public boolean getExcused() {
        return excused;
    }

    public void setExcused(boolean excused) {
        this.excused = excused;
    }

    public void setFrom(LocalDate from) {
        this.from = from;
    }

    public void setTo(LocalDate to) {
        this.to = to;
    }

    public void setReason(String reason) {
        this.reason = reason;
    }
}
/////////////////////////////////////////////////////////////////
package model;

import java.util.HashSet;
import java.util.Optional;
import java.util.Set;
import java.util.UUID;

public class DataStore {

    private static DataStore instance;
    private Set<Pupil> pupils = new HashSet<>();

    private DataStore() {}

    public static DataStore getInstance() {
        if (instance == null) {
            instance = new DataStore();
        }
        return instance;
    }

    public Set<Pupil> getPupils(){
        return pupils;
    }

    public void setPupils(Set<Pupil> pupils) {
        this.pupils = pupils;
    }

    public Pupil getPupilById(UUID id) {
        for(Pupil p : pupils) {
            if(p.getId().equals(id)) {
                return p;
            }
        }
        return null;
    }
}
/////////////////////////////////////////////////////////////////
package model;

import java.time.LocalDate;
import java.util.HashSet;
import java.util.Set;
import java.util.UUID;

public class Pupil {
    private UUID id;
    private String firstName;
    private String lastName;
    private LocalDate dateOfBirth;
    private String studentNumber;
    private Set<Absence> absences = new HashSet<>();

    public Pupil() {
        id = UUID.randomUUID();
    }

    public Pupil(UUID id, String firstName, String lastName, LocalDate dateOfBirth, String studentNumber) {
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
        this.dateOfBirth = dateOfBirth;
        this.studentNumber = studentNumber;
    }

    public UUID getId() {
        return id;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public LocalDate getDateOfBirth() {
        return dateOfBirth;
    }

    public String getStudentNumber() {
        return studentNumber;
    }

    public Set<Absence> getAbsences() {
        return absences;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public void setDateOfBirth(LocalDate dateOfBirth) {
        this.dateOfBirth = dateOfBirth;
    }

    public void setStudentNumber(String studentNumber) {
        this.studentNumber = studentNumber;
    }

    public void setAbsences(Set<Absence> absences) {
        this.absences = absences;
    }

    public Absence getAbsenceByID(UUID id) {
        for(Absence absence : absences) {
            if(absence.getId().equals(id)) {
                return absence;
            }
        }
        return null;
    }
}
/////////////////////////////////////////////////////////////////
import common.IDataResource;
import model.DataStore;
import model.Pupil;

import java.util.Set;

public class DataResource implements IDataResource {

    @Override
    public Set<Pupil> importData(Set<Pupil> pupils) {
        DataStore dataStore = DataStore.getInstance();
        dataStore.setPupils(pupils);
        return dataStore.getPupils();
    }
}
/////////////////////////////////////////////////////////////////
import common.IPupilResource;
import model.Absence;
import model.DataStore;
import model.Pupil;

import java.util.UUID;

public class PupilResource implements IPupilResource {
    private DataStore dataStore = DataStore.getInstance();

    @Override
    public Absence addAbsence(String pupil_id, Absence absence) {
        Pupil pupil = dataStore.getPupilById(UUID.fromString(pupil_id));
        pupil.getAbsences().add(absence);
        return pupil.getAbsenceByID(absence.getId());
    }

    @Override
    public Absence getAbsenceByID(String pupil_id, String absence_id) {
        Pupil pupil = dataStore.getPupilById(UUID.fromString(pupil_id));
        return pupil.getAbsenceByID(UUID.fromString(absence_id));
    }

    @Override
    public Absence excuseAbsence(String pupil_id, String absence_id) {
        Pupil pupil = dataStore.getPupilById(UUID.fromString(pupil_id));
        pupil.getAbsenceByID(UUID.fromString(absence_id)).setExcused(true);
        return pupil.getAbsenceByID(UUID.fromString(absence_id));
    }
}