3단계 - 수강신청(DB 적용)

README.md

@@ -62,3 +62,16 @@
 
 - 도메인 모델은 TDD로 구현
     - Service 클래스는 단위 테스트가 없어도 된다
+
+### 3단계 - 수강신청(DB 적용)
+
+#### 프로그래밍 요구사항
+
+1. [x] 이미지 생성 기능
+2. [x] 이미지 조회 기능
+3. [x] 이미지 수정 기능
+4. [x] 이미지 삭제 기능
+5. [x] 강의 생성 기능
+6. [x] 강의 조회 기능
+7. [x] 강의 수정 기능
+8. [x] 강의 삭제 기능

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

@@ -9,17 +9,20 @@ public class Image {
     private static final int MINIMUM_HEIGHT = 200;
     private static final Set<String> ALLOWED_TYPES = Set.of("gif", "jpg", "jpeg", "png", "svg");
 
-    private final String fileName;
-    private final int fileSize;
-    private final String fileType;
-    private final int width;
-    private final int height;
+    private Long id;
+    private int sessionId;
+    private String fileName;
+    private int fileSize;
+    private String fileType;
+    private int width;
+    private int height;
 
-    public Image(String fileName, int fileSize, String fileType, int width, int height) {
+    public Image(int sessionId, String fileName, int fileSize, String fileType, int width, int height) {
         validateSize(fileSize);
         validateFileType(fileType);
         validateFileStandard(width, height);
 
+        this.sessionId = sessionId;
         this.fileName = fileName;
         this.fileSize = fileSize;
         this.fileType = fileType;
@@ -49,4 +52,44 @@ private void validateFileStandard(int width, int height) {
         }
     }
 
+    public Long getId() {
+        return id;
+    }
+
+    public int getSessionId() {
+        return sessionId;
+    }
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public int getFileSize() {
+        return fileSize;
+    }
+
+    public String getFileType() {
+        return fileType;
+    }
+
+    public int getWidth() {
+        return width;
+    }
+
+    public int getHeight() {
+        return height;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public void setSessionId(int sessionId) {
+        this.sessionId = sessionId;
+    }
+
+    public void setFileName(String fileName) {
+        this.fileName = fileName;
+    }
+
 }

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

@@ -0,0 +1,11 @@
+package nextstep.courses.domain;
+
+public interface ImageRepository {
+    int save(Image image);
+
+    Image findById(Long id);
+
+    int update(Image image);
+
+    int deleteById(Long id);
+}

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

@@ -0,0 +1,13 @@
+package nextstep.courses.domain;
+
+import nextstep.courses.domain.session.Session;
+
+public interface SessionRepository {
+    int save(Session session);
+
+    Session findById(Long id);
+
+    int update(Session session);
+
+    int deleteById(Long id);
+}

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

@@ -0,0 +1,20 @@
+package nextstep.courses.domain.session;
+
+import nextstep.courses.constants.SessionStatus;
+import nextstep.courses.domain.Image;
+
+import java.time.LocalDate;
+
+public class FreeSession extends Session {
+    public FreeSession(Long id, Long courseId, String title, LocalDate startDate, LocalDate endDate, Image sessionImage) {
+        super(id, courseId, title, startDate, endDate, sessionImage, SessionStatus.READY);
+    }
+
+    @Override
+    public void enroll(int payment) {
+        if (status != SessionStatus.OPEN) {
+            throw new IllegalStateException("수강 신청은 모집중인 상태에서만 가능합니다.");
+        }
+        enrollCount++;
+    }
+}

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

@@ -0,0 +1,43 @@
+package nextstep.courses.domain.session;
+
+import nextstep.courses.constants.SessionStatus;
+import nextstep.courses.domain.Image;
+
+import java.time.LocalDate;
+
+public class PaidSession extends Session {
+    private int maxEnrollment;
+    private int sessionFee;
+
+    public abstract class Session {
+        protected Long courseId;
+
+        public Session(Long id, Long courseId, String title, LocalDate startDate, LocalDate endDate, Image sessionImage, SessionStatus status) {
+            this.courseId = courseId;
+        }
+    }
+
+    public PaidSession(Long courseId, String title, LocalDate startDate, LocalDate endDate, Image sessionImage, int maxEnrollment, int sessionFee) {
+        super(null, courseId, title, startDate, endDate, sessionImage, SessionStatus.READY);
+        this.maxEnrollment = maxEnrollment;
+        this.sessionFee = sessionFee;
+    }
+
+    @Override
+    public void enroll(int payment) {
+        if (status != SessionStatus.OPEN) {
+            throw new IllegalStateException("수강 신청은 모집중인 상태에서만 가능합니다.");
+        }
+        if (enrollCount >= maxEnrollment) {
+            throw new IllegalStateException("수강 인원이 초과되었습니다.");
+        }
+        if (payment != sessionFee) {
+            throw new IllegalArgumentException("결제 금액이 수강료와 일치하지 않습니다.");
+        }
+        enrollCount++;
+    }
+
+    public int getSessionFee() {
+        return sessionFee;
+    }
+}

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

@@ -0,0 +1,87 @@
+package nextstep.courses.domain.session;
+
+import nextstep.courses.constants.SessionStatus;
+import nextstep.courses.domain.Image;
+
+import java.time.LocalDate;
+import java.time.temporal.ChronoUnit;
+
+public abstract class Session {
+    protected Long id;
+    protected Long courseId;
+    protected String title;
+    protected LocalDate startDate;
+    protected LocalDate endDate;
+    protected Image sessionImage;
+    protected int enrollCount;
+    protected SessionStatus status;
+
+    public Session(Long id, Long courseId, String title, LocalDate startDate, LocalDate endDate, Image sessionImage, SessionStatus status) {
+        validateDate(startDate, endDate);
+        this.id = id;
+        this.courseId = courseId;
+        this.title = title;
+        this.startDate = startDate;
+        this.endDate = endDate;
+        this.sessionImage = sessionImage;
+        this.status = status;
+        this.enrollCount = 0;
+    }
+
+
+    public Session(String title, LocalDate startDate, LocalDate endDate, Image sessionImage, SessionStatus status) {
+        this(null, null, title, startDate, endDate, sessionImage, status);
+    }
+
+    private void validateDate(LocalDate startDate, LocalDate endDate) {
+        if (startDate.isAfter(endDate)) {
+            throw new IllegalArgumentException("시작일은 종료일 이전이어야 합니다.");
+        }
+    }
+
+    public void startEnrollment() {
+        this.status = SessionStatus.OPEN;
+    }
+
+    public void closeEnrollment() {
+        this.status = SessionStatus.CLOSED;
+    }
+
+    public abstract void enroll(int payment);
+
+    public int getEnrolledCount() {
+        return enrollCount;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public Long getCourseId() {
+        return courseId;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public long getDuration() {
+        return ChronoUnit.DAYS.between(startDate, endDate);
+    }
+
+    public LocalDate getStartTime() {
+        return this.startDate;
+    }
+
+    public LocalDate getEndTime() {
+        return this.endDate;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+}