Step3 리뷰요청 드립니다.

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

@@ -1,5 +1,8 @@
 package nextstep.courses.domain;
 
+import nextstep.courses.domain.session.Session;
+import nextstep.courses.domain.session.Sessions;
+
 import java.time.LocalDateTime;
 
 public class Course {

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

@@ -1,4 +1,4 @@
-package nextstep.courses.domain;
+package nextstep.courses.domain.enrollment;
 
 public class Capacity {
 
@@ -23,4 +23,8 @@ public void validateAvailable() {
     public void increase() {
         this.current++;
     }
+
+    public int value() {
+        return max;
+    }
 }

src/main/java/nextstep/courses/domain/enrollment/Enrollment.java

@@ -0,0 +1,36 @@
+package nextstep.courses.domain.enrollment;
+
+import java.time.LocalDateTime;
+
+public class Enrollment {
+    private final Long sessionId;
+    private final Long userId;
+    private final LocalDateTime enrollmentDate;
+
+    public Enrollment(Long sessionId, Long userId) {
+        this(sessionId, userId, LocalDateTime.now());
+    }
+
+    public Enrollment(Long sessionId, Long userId, LocalDateTime enrollmentDate) {
+        this.sessionId = sessionId;
+        this.userId = userId;
+        this.enrollmentDate = enrollmentDate;
+    }
+
+    public boolean isSameUser(Long userId) {
+        return this.userId.equals(userId);
+    }
+
+    public Long getSessionId() {
+        return sessionId;
+    }
+
+
+    public Long getUserId() {
+        return userId;
+    }
+
+    public LocalDateTime getEnrollmentDate() {
+        return enrollmentDate;
+    }
+}

src/main/java/nextstep/courses/domain/EnrollmentPolicy.java → src/main/java/nextstep/courses/domain/enrollment/EnrollmentPolicy.java

@@ -1,7 +1,9 @@
-package nextstep.courses.domain;
+package nextstep.courses.domain.enrollment;
 
 import nextstep.payments.domain.Payment;
 
 public interface EnrollmentPolicy {
+    PolicyType type();
+    Long price();
     void validateEnrollment(Payment payment);
 }

src/main/java/nextstep/courses/domain/enrollment/EnrollmentPolicyFactory.java

@@ -0,0 +1,20 @@
+package nextstep.courses.domain.enrollment;
+
+import static nextstep.courses.domain.enrollment.PolicyType.FREE;
+import static nextstep.courses.domain.enrollment.PolicyType.PAID;
+
+public class EnrollmentPolicyFactory {
+    public static EnrollmentPolicy create(String name, Long price) {
+        PolicyType type = PolicyType.valueOf(name);
+
+        if (type == FREE) {
+            return new FreeEnrollmentPolicy();
+        }
+
+        if (type == PAID) {
+            return new PaidEnrollmentPolicy(new Money(price));
+        }
+
+        throw new IllegalArgumentException();
+    }
+}

src/main/java/nextstep/courses/domain/Enrollments.java → src/main/java/nextstep/courses/domain/enrollment/Enrollments.java

@@ -1,4 +1,4 @@
-package nextstep.courses.domain;
+package nextstep.courses.domain.enrollment;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -25,7 +25,7 @@ public void validateEnroll(Long userId) {
         capacity.validateAvailable();
     }
 
-    public Enrollment add(Long sessionId, Long userId) {
+    public Enrollment enroll(Long sessionId, Long userId) {
         validateEnroll(userId);
 
         Enrollment enrollment = new Enrollment(sessionId, userId);
@@ -39,6 +39,10 @@ private boolean EnrolledCheck(Long userId) {
         return enrollments.stream()
                 .anyMatch(enrollment -> enrollment.isSameUser(userId));
     }
+
+    public int getCapacity() {
+        return capacity.value();
+    }
 }
 
 

src/main/java/nextstep/courses/domain/FreeEnrollmentPolicy.java → src/main/java/nextstep/courses/domain/enrollment/FreeEnrollmentPolicy.java

@@ -1,8 +1,18 @@
-package nextstep.courses.domain;
+package nextstep.courses.domain.enrollment;
 
 import nextstep.payments.domain.Payment;
 
 public class FreeEnrollmentPolicy implements EnrollmentPolicy{
+    @Override
+    public PolicyType type() {
+        return PolicyType.FREE;
+    }
+
+    @Override
+    public Long price() {
+        return null;
+    }
+
     @Override
     public void validateEnrollment(Payment payment) {
         // 무료강의는 검증하지 않는다

src/main/java/nextstep/courses/domain/Money.java → src/main/java/nextstep/courses/domain/enrollment/Money.java

@@ -1,4 +1,4 @@
-package nextstep.courses.domain;
+package nextstep.courses.domain.enrollment;
 
 import java.util.Objects;
 
@@ -13,6 +13,10 @@ public boolean isEqualTo(Money other) {
         return this.equals(other);
     }
 
+    public long value() {
+        return amount;
+    }
+
     @Override
     public boolean equals(Object object) {
         if (this == object) return true;

src/main/java/nextstep/courses/domain/PaidEnrollmentPolicy.java → src/main/java/nextstep/courses/domain/enrollment/PaidEnrollmentPolicy.java

@@ -1,4 +1,4 @@
-package nextstep.courses.domain;
+package nextstep.courses.domain.enrollment;
 
 import nextstep.payments.domain.Payment;
 
@@ -10,6 +10,16 @@ public PaidEnrollmentPolicy(Money money) {
         this.money = money;
     }
 
+    @Override
+    public PolicyType type() {
+        return PolicyType.PAID;
+    }
+
+    @Override
+    public Long price() {
+        return money.value();
+    }
+
     @Override
     public void validateEnrollment(Payment payment) {
         validatePayment(payment);

src/main/java/nextstep/courses/domain/enrollment/PolicyType.java

@@ -0,0 +1,6 @@
+package nextstep.courses.domain.enrollment;
+
+public enum PolicyType {
+    FREE,
+    PAID
+}

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

@@ -0,0 +1,112 @@
+package nextstep.courses.domain.session;
+
+import nextstep.courses.domain.enrollment.Enrollment;
+import nextstep.courses.domain.enrollment.EnrollmentPolicy;
+import nextstep.courses.domain.enrollment.Enrollments;
+import nextstep.courses.domain.session.cover.CoverImage;
+import nextstep.payments.domain.Payment;
+
+import java.time.LocalDateTime;
+
+public class Session {
+    private final long id;
+    private final long courseId;
+    private final SessionDuration sessionDuration;
+    private final CoverImage coverImage;
+    private final EnrollmentPolicy enrollmentPolicy;
+    private final SessionState sessionState;
+    private final Enrollments enrollments;
+
+    public Session(long id
+            , long courseId
+            , LocalDateTime startDate
+            , LocalDateTime endDate
+            , int size
+            , String fileName
+            , int width
+            , int height
+            , EnrollmentPolicy enrollmentPolicy
+            , SessionState sessionState
+            , Enrollments enrollments) {
+
+        this(id, courseId, new SessionDuration(startDate, endDate), new CoverImage(size, fileName, width, height)
+                , enrollmentPolicy, sessionState, enrollments);
+    }
+
+    public Session(long id, long courseId, SessionDuration sessionDuration, CoverImage coverImage
+            , EnrollmentPolicy enrollmentPolicy, SessionState sessionState, Enrollments enrollments) {
+        this.id = id;
+        this.courseId = courseId;
+        this.sessionDuration = sessionDuration;
+        this.coverImage = coverImage;
+        this.enrollmentPolicy = enrollmentPolicy;
+        this.sessionState = sessionState;
+        this.enrollments = enrollments;
+    }
+
+    public Enrollment enroll(Long userId, Payment payment) {
+        sessionState.validateEnroll();
+        enrollmentPolicy.validateEnrollment(payment);
+        return enrollments.enroll(this.id, userId);
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public long getCourseId() {
+        return courseId;
+    }
+
+    public LocalDateTime getStartDate() {
+        return sessionDuration.getStartDate();
+    }
+
+    public LocalDateTime getEndDate() {
+        return sessionDuration.getEndDate();
+    }
+
+    public int getCoverImageSize() {
+        return coverImage.getImageSize();
+    }
+
+    public String getCoverImageName() {
+        return coverImage.getImageName();
+    }
+
+    public int getCoverImageWidth() {
+        return coverImage.getCoverImageWidth();
+    }
+
+    public int getCoverImageHeight() {
+        return coverImage.getCoverImageHeight();
+    }
+
+    public String getPolicyType() {
+        return enrollmentPolicy.type().name();
+    }
+
+    public long getPrice() {
+        return enrollmentPolicy.price();
+    }
+
+    public String getState() {
+        return sessionState.name();
+    }
+
+    public int getCapacity() {
+        return enrollments.getCapacity();
+    }
+
+    @Override
+    public String toString() {
+        return "Session{" +
+                "id=" + id +
+                ", sessionDuration=" + sessionDuration +
+                ", coverImage=" + coverImage +
+                ", enrollmentPolicy=" + enrollmentPolicy +
+                ", sessionState=" + sessionState +
+                ", enrollments=" + enrollments +
+                '}';
+    }
+}