backend/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java

package com.plannaplan.entities;

import java.util.HashSet;
import java.util.Set;

import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;

import com.plannaplan.types.GroupType;
import com.plannaplan.types.WeekDay;

/**
 * Entity of Groups grouping of state ssociated about
 * course,time,room,capacity,type,day
 */

@Entity
public class Groups {
    private static final int DEFAULT_CLASS_TIME = 90;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    @ManyToOne
    @JoinColumn(name = "course_id")
    private Course course;
    private int time;
    private int endTime;
    private String room;
    private int capacity;
    private GroupType type;
    private WeekDay day;
    @ManyToOne
    @JoinColumn(name = "lecturer_id")
    private Lecturer lecturer;
    private Integer zajCykId;
    private Integer grNr;
    @ManyToMany(mappedBy = "studentRegisteredGrups", fetch = FetchType.EAGER)
    private Set<User> registeredStudents;

    public Set<User> getRegisteredStudents() {
        return this.registeredStudents;
    }

    public void assignUser(User user) {
        if (this.registeredStudents == null) {
            this.registeredStudents = new HashSet<>();
        }
        this.registeredStudents.add(user);
    }

    public Groups() {
    }

    public Integer getGrNr() {
        return grNr;
    }

    public void setGrNr(Integer grNr) {
        this.grNr = grNr;
    }

    public Integer getZajCykId() {
        return zajCykId;
    }

    public void setZajCykId(Integer zajCykId) {
        this.zajCykId = zajCykId;
    }

    /**
     * Groups
     * 
     * @param capacity capacity given to the groups
     * @param room     room given to the groups
     * @param course   course given to the groups
     * @param time     time given to the groups
     * @param endTime  end time of class in minutes
     * @param day      day given to the groups
     * @param lecturer lecturer given to the groups
     */
    public Groups(int capacity, String room, Course course, int time, int endTime, WeekDay day, Lecturer lecturer) {
        this.capacity = capacity;
        this.room = room;
        this.course = course;
        this.time = time;
        this.endTime = endTime;
        this.day = day;
        this.lecturer = lecturer;
        this.type = capacity >= 50 ? GroupType.LECTURE : GroupType.CLASS;
    }

    /**
     * Groups
     * 
     * @param capacity capacity given to the groups
     * @param room     room given to the groups
     * @param course   course given to the groups
     * @param time     time given to the groups
     * @param endTime  end time of class in minutes
     * @param day      day given to the groups
     * @param lecturer lecturer given to the groups
     * @param zajCykId number of class in the term
     * @param grNr     Number of class/course
     * @param type     type of class/cource
     */
    public Groups(int capacity, String room, Course course, int time, int endTime, WeekDay day, Lecturer lecturer,
            Integer zajCykId, Integer grNr, GroupType type) {
        this(capacity, room, course, time, endTime, day, lecturer, zajCykId, grNr);
        this.type = type;
    }

    /**
     * Groups
     * 
     * @param capacity capacity given to the groups
     * @param room     room given to the groups
     * @param course   course given to the groups
     * @param time     time given to the groups
     * @param day      day given to the groups
     * @param lecturer lecturer given to the groups
     * @param zajCykId number of class in the term
     * @param grNr     Number of class/course
     * @param type     type of class/cource
     */
    public Groups(int capacity, String room, Course course, int time, WeekDay day, Lecturer lecturer,
            Integer zajCykId, Integer grNr, GroupType type) {
        this(capacity, room, course, time, time + DEFAULT_CLASS_TIME, day, lecturer, zajCykId, grNr);
        this.type = type;
    }

    /**
     * Groups
     * 
     * @param capacity capacity given to the groups
     * @param room     room given to the groups
     * @param course   course given to the groups
     * @param time     time given to the groups
     * @param endTime  end time of class in minutes
     * @param day      day given to the groups
     * @param lecturer lecturer given to the groups
     * @param zajCykId number of class in the term
     * @param grNr     Number of class/course
     */
    public Groups(int capacity, String room, Course course, int time, int endTime, WeekDay day, Lecturer lecturer,
            Integer zajCykId, Integer grNr) {
        this(capacity, room, course, time, endTime, day, lecturer);
        this.zajCykId = zajCykId;
        this.grNr = grNr;
    }

    /**
     * Groups
     * 
     * @param capacity capacity given to the groups
     * @param room     room given to the groups
     * @param course   course given to the groups
     * @param time     time given to the groups
     * @param day      day given to the groups
     * @param lecturer lecturer given to the groups
     * @param zajCykId number of class in the term
     * @param grNr     Number of class/course
     */
    public Groups(int capacity, String room, Course course, int time, WeekDay day, Lecturer lecturer, Integer zajCykId,
            Integer grNr) {
        this(capacity, room, course, time, time + DEFAULT_CLASS_TIME, day, lecturer);
        this.zajCykId = zajCykId;
        this.grNr = grNr;
    }

    /**
     * Create groups with default class duration
     * 
     * @param capacity capacity given to the groups
     * @param room     room given to the groups
     * @param course   course given to the groups
     * @param time     time given to the groups
     * @param day      day given to the groups
     * @param lecturer lecturer given to the groups
     */
    public Groups(int capacity, String room, Course course, int time, WeekDay day, Lecturer lecturer) {
        this(capacity, room, course, time, time + DEFAULT_CLASS_TIME, day, lecturer);
    }

    /**
     * Updates given values other that are not null
     * 
     * @param capacity capacity given to the groups
     * @param room     room given to the groups
     * @param course   course given to the groups
     * @param time     time given to the groups
     * @param endTime  end time of class in minutes
     * @param day      day given to the groups
     * @param lecturer lecturer given to the groups
     * @param type     type given to the groups
     */
    public void update(Integer capacity, String room, Course course, Integer time, Integer endTime, WeekDay day,
            Lecturer lecturer, GroupType type) {
        if (capacity != null) {
            this.capacity = capacity;
        }

        if (room != null) {
            this.room = room;
        }

        if (course != null) {
            this.course = course;
        }

        if (time != null) {
            this.time = time;
        }

        if (endTime != null) {
            this.endTime = endTime;
        }

        if (day != null) {
            this.day = day;
        }

        if (lecturer != null) {
            this.lecturer = lecturer;
        }

        if (type != null) {
            this.type = type;
        }
    }

    /**
     * get time of class end
     * 
     * @return hour of class finish time in minutes
     */
    public int getEndTime() {
        return endTime;
    }

    /**
     * getId
     * 
     * @return id
     */
    public Long getId() {
        return this.id;
    }

    /**
     * getLecturer
     * 
     * @return lecturer
     */
    public Lecturer getLecturer() {
        return lecturer;
    }

    /**
     * setLecturer
     * 
     * @param lecturer set lecturer into groups
     */
    public void setLecturer(Lecturer lecturer) {
        this.lecturer = lecturer;
    }

    /**
     * WeekDay
     * 
     * @return day
     */
    public WeekDay getDay() {
        return day;
    }

    /**
     * setLecturer
     * 
     * @param day set day into groups
     */
    public void setDay(WeekDay day) {
        this.day = day;
    }

    /**
     * GroupType
     * 
     * @return type
     */
    public GroupType getType() {
        return type;
    }

    /**
     * setType
     * 
     * @param type set type into groups
     */
    public void setType(GroupType type) {
        this.type = type;
    }

    /**
     * getCapacity
     * 
     * @return capacity
     */
    public int getCapacity() {
        return capacity;
    }

    /**
     * setCapacity
     * 
     * @param capacity set capacity into groups
     */
    public void setCapacity(int capacity) {
        this.capacity = capacity;
    }

    /**
     * getRoom
     * 
     * @return room
     */
    public String getRoom() {
        return room;
    }

    /**
     * setRoom
     * 
     * @param room set room into groups
     */
    public void setRoom(String room) {
        this.room = room;
    }

    /**
     * getTime
     * 
     * @return time
     */
    public int getTime() {
        return time;
    }

    /**
     * setTime
     * 
     * @param time set time into groups
     */
    public void setTime(int time) {
        this.time = time;
    }

    /**
     * getCourseId
     * 
     * @return course
     */
    public Course getCourseId() {
        return course;
    }

    /**
     * setCourseId
     * 
     * @param courseId set courseId into groups
     */
    public void setCourseId(Course courseId) {
        this.course = courseId;
    }

    /**
     * getTimeString
     * 
     * @return time as formated String
     */
    public String getTimeString() {
        int minutes = this.getTime() % 60;
        String hoursString = Integer.toString(this.getTime() / 60);
        String minutesString = Integer.toString(minutes);
        if (minutes < 10) {
            minutesString = "0" + minutesString;
        }
        return String.format("%s.%s", hoursString, minutesString);
    }

    /**
     * gets end time formated strins
     * 
     * @return end time as formated String
     */
    public String getEndTimeString() {
        int minutes = this.getEndTime() % 60;
        String hoursString = Integer.toString(this.getEndTime() / 60);
        String minutesString = Integer.toString(minutes);
        if (minutes < 10) {
            minutesString = "0" + minutesString;
        }
        return String.format("%s.%s", hoursString, minutesString);
    }
}