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nooosenooose
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Merge pull request #728 from heewonham/step2
2단계 - 수강신청(도메인 모델)
2 parents 74636dc + 03942b2 commit cb8f94f

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18 files changed

+551
-3
lines changed

18 files changed

+551
-3
lines changed

‎src/main/java/nextstep/courses/domain/Capacity.java

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package nextstep.courses.domain;
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public class Capacity {
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private final int value;
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public Capacity(int value) {
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if (value <= 0) {
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throw new IllegalArgumentException("수강 정원은 0이거나 음수일 수 없습니다.");
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}
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this.value = value;
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}
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public int getValue() {
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return value;
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}
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public boolean isFull(int registeredCount) {
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return registeredCount >= value;
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}
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}

‎src/main/java/nextstep/courses/domain/Course.java

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package nextstep.courses.domain;
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import java.time.LocalDateTime;
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import java.util.ArrayList;
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public class Course {
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private Long id;
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private LocalDateTime createdAt;
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private LocalDateTime updatedAt;
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private int generation;
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private Sessions sessions;
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public Course() {
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}
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return createdAt;
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}
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public void addSession(Session session) {
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if (sessions == null) {
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sessions = new Sessions(new ArrayList<>());
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}
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sessions.add(session);
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}
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public void removeSession(Session session) {
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if (sessions == null) {
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return;
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}
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sessions.remove(session);
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}
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@Override
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public String toString() {
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return "Course{" +

‎src/main/java/nextstep/courses/domain/FreeSession.java

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package nextstep.courses.domain;
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import nextstep.payments.domain.Payment;
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public class FreeSession extends Session {
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public FreeSession(Long id, String name, Period period, Image coverImage, SessionStatus status) {
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super(id, name, period, coverImage, status);
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}
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@Override
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protected void validateRegistration(Long studentId, Payment payment) {
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}
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@Override
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public SessionType getType() {
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return SessionType.FREE;
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}
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}

‎src/main/java/nextstep/courses/domain/Image.java

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package nextstep.courses.domain;
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public class Image {
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private String fileName;
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private String contentType;
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private long sizeInBytes;
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private int width;
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private int height;
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private static final int IMAGE_SIZE_1MB = 1024 * 1024;
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private static final int WIDTH_LIMIT = 300;
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private static final int HEIGHT_LIMIT = 200;
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private static final double REQUIRED_ASPECT_RATIO = 1.5;
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private static final double ASPECT_RATIO_TOLERANCE = 0.01;
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public Image(String fileName, String contentType, long sizeInBytes, int width, int height) {
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validate(contentType, sizeInBytes, width, height);
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this.fileName = fileName;
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this.contentType = contentType;
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this.sizeInBytes = sizeInBytes;
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this.width = width;
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this.height = height;
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}
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private void validate(String contentType, long sizeInBytes, int width, int height) {
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if (sizeInBytes > IMAGE_SIZE_1MB) {
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throw new IllegalArgumentException("이미지 크기는 1MB 이하여야 합니다.");
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}
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if (!contentType.matches("(gif|jpeg|jpg|png|svg)")) {
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throw new IllegalArgumentException("허용되지 않는 이미지 형식입니다.");
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}
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if (width < WIDTH_LIMIT || height < HEIGHT_LIMIT) {
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throw new IllegalArgumentException("이미지 크기가 너무 작습니다.");
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}
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double ratio = (double) width / height;
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if (Math.abs(ratio - REQUIRED_ASPECT_RATIO) > ASPECT_RATIO_TOLERANCE) {
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throw new IllegalArgumentException("이미지 비율은 3:2여야 합니다.");
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}
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}
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}

‎src/main/java/nextstep/courses/domain/PaidSession.java

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package nextstep.courses.domain;
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import nextstep.payments.domain.Payment;
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public class PaidSession extends Session {
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private Capacity maxCapacity;
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private TuitionFee tuitionFee;
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public PaidSession(Long id, String name, Period period, Image coverImage,
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SessionStatus status, int maxCapacity, int tuitionFee) {
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super(id, name, period, coverImage, status);
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this.maxCapacity = new Capacity(maxCapacity);
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this.tuitionFee = new TuitionFee(tuitionFee);
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}
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@Override
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protected void validateRegistration(Long studentId, Payment payment) {
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if (registeredStudents.size() >= maxCapacity.getValue()) {
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throw new IllegalStateException("수강 인원을 초과하였습니다.");
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}
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if (payment == null) {
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throw new IllegalArgumentException("결제 정보가 없습니다.");
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}
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if (!this.id.equals(payment.getSessionId())) {
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throw new IllegalArgumentException("결제한 강의와 일치하지 않습니다.");
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}
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if (!studentId.equals(payment.getNsUserId())) {
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throw new IllegalArgumentException("결제한 사용자와 일치하지 않습니다.");
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}
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if (this.tuitionFee.getAmount() != payment.getAmount()) {
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throw new IllegalArgumentException("결제 금액과 일치하지 않습니다.");
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}
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}
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@Override
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public SessionType getType() {
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return SessionType.PAID;
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}
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}

‎src/main/java/nextstep/courses/domain/Period.java

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package nextstep.courses.domain;
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import java.time.LocalDate;
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public class Period {
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private final LocalDate startDate;
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private final LocalDate endDate;
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public Period(LocalDate startDate, LocalDate endDate) {
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if (endDate.isBefore(startDate) || endDate.isEqual(startDate)) {
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throw new IllegalArgumentException("종료일은 시작일보다 이후여야 합니다.");
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}
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this.startDate = startDate;
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this.endDate = endDate;
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}
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public LocalDate getStartDate() {
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return startDate;
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}
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public LocalDate getEndDate() {
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return endDate;
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}
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}

‎src/main/java/nextstep/courses/domain/Session.java

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package nextstep.courses.domain;
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import nextstep.payments.domain.Payment;
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import java.util.HashSet;
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import java.util.Set;
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public abstract class Session {
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protected Long id;
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protected String name;
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protected Period period;
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protected Image coverImage;
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protected SessionStatus status;
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protected Set<Long> registeredStudents = new HashSet<>();
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public Session(Long id, String name, Period period, Image coverImage, SessionStatus status) {
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this.id = id;
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this.name = name;
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this.period = period;
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this.coverImage = coverImage;
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this.status = status;
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}
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public void register(Long studentId, Payment payment) {
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if (status != SessionStatus.RECRUITING) {
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throw new IllegalStateException("수강 신청은 모집중일 때만 가능합니다.");
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}
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validateRegistration(studentId, payment);
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registeredStudents.add(studentId);
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}
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public boolean isRegistered(Long studentId) {
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return registeredStudents.contains(studentId);
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}
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protected abstract void validateRegistration(Long studentId, Payment payment);
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public abstract SessionType getType();
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}

‎src/main/java/nextstep/courses/domain/SessionStatus.java

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package nextstep.courses.domain;
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public enum SessionStatus {
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PREPARING,
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RECRUITING,
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CLOSED,
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}

‎src/main/java/nextstep/courses/domain/SessionType.java

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package nextstep.courses.domain;
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public enum SessionType {
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FREE,
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PAID,
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}

‎src/main/java/nextstep/courses/domain/Sessions.java

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package nextstep.courses.domain;
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import java.util.List;
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public class Sessions {
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private final List<Session> sessions;
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public Sessions(List<Session> sessions) {
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this.sessions = sessions;
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}
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public void add(Session session) {
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sessions.add(session);
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}
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public void remove(Session session) {
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sessions.remove(session);
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}
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}

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