Chapter 02을 공부하고 테스트 코드를 추가하라

src/main/java/com/study/object/chapter02/README.md

@@ -1,3 +1,3 @@
 ## 02. 객체 지향 프로그래밍
 ---
-영화 예매 시스템
+영화 예매 시스템 

src/main/java/com/study/object/chapter02/movie/AmountDiscountPolicy.java

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+package com.study.object.chapter02.movie;
+
+public class AmountDiscountPolicy extends DefaultDiscountPolicy{
+    private Money discountAmount;
+
+    public AmountDiscountPolicy(Money discountAmount, DiscountCondition... conditions) {
+        super(conditions);
+        this.discountAmount = discountAmount;
+    }
+
+    @Override
+    public Money getDiscountAmount(Screening screening) {
+        return discountAmount;
+    }
+}

src/main/java/com/study/object/chapter02/movie/Customer.java

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+package com.study.object.chapter02.movie;
+
+public class Customer {
+}

src/main/java/com/study/object/chapter02/movie/DefaultDiscountPolicy.java

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+package com.study.object.chapter02.movie;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public abstract class DefaultDiscountPolicy implements DiscountPolicy {
+    private List<DiscountCondition> conditions = new ArrayList<>();
+
+    public DefaultDiscountPolicy(DiscountCondition ...conditions) {
+        this.conditions = List.of(conditions);
+    }
+
+    @Override
+    public Money calculateDiscountAmount(Screening screening) {
+        for(DiscountCondition each: conditions){
+            if(each.isSatisfiedBy(screening)){
+                return getDiscountAmount(screening);
+            }
+        }
+
+        return Money.ZERO;
+    }
+
+    public abstract Money getDiscountAmount(Screening screening);
+}

src/main/java/com/study/object/chapter02/movie/DiscountCondition.java

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+package com.study.object.chapter02.movie;
+
+public interface DiscountCondition {
+
+    boolean isSatisfiedBy(Screening screening);
+}

src/main/java/com/study/object/chapter02/movie/DiscountPolicy.java

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+package com.study.object.chapter02.movie;
+
+public interface DiscountPolicy {
+    Money calculateDiscountAmount(Screening screening);
+}

src/main/java/com/study/object/chapter02/movie/Money.java

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+package com.study.object.chapter02.movie;
+
+import lombok.ToString;
+
+import java.math.BigDecimal;
+import java.util.Objects;
+
+@ToString
+public class Money {
+    public static final Money ZERO = Money.wons(0);
+
+    private BigDecimal amount;
+
+    public Money(BigDecimal amount) {
+        this.amount = amount;
+    }
+
+    public static Money wons(long amount) {
+        return new Money(BigDecimal.valueOf(amount));
+    }
+
+    public static Money wons(double amount) {
+        return new Money(BigDecimal.valueOf(amount));
+    }
+
+    public Money plus(Money amount){
+        return new Money(this.amount.add(amount.amount));
+    }
+
+    public Money minus(Money amount){
+        return new Money(this.amount.subtract(amount.amount));
+    }
+
+    public Money times(double percent){
+        return new Money(this.amount.multiply(new BigDecimal(percent)));
+    }
+
+    public boolean isLessThan(Money other){
+        return this.amount.compareTo(other.amount) < 0;
+    }
+
+    public boolean isGreaterThan(Money other){
+        return this.amount.compareTo(other.amount) >= 0;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o){
+            return true;
+        }
+
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        Money money = (Money) o;
+
+        return amount.compareTo(money.amount) == 0;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(amount);
+    }
+}

src/main/java/com/study/object/chapter02/movie/Movie.java

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+package com.study.object.chapter02.movie;
+
+import java.time.Duration;
+
+public class Movie {
+    private String title;
+    private Duration duration;
+    private Money fee;
+    private DiscountPolicy discountPolicy;
+
+    public Movie(String title, Duration duration, Money fee, DiscountPolicy discountPolicy) {
+        this.title = title;
+        this.duration = duration;
+        this.fee = fee;
+        this.discountPolicy = discountPolicy;
+    }
+
+    public void changeDiscountPolicy(DiscountPolicy discountPolicy){
+        this.discountPolicy = discountPolicy;
+    }
+
+    public Money getFee() {
+        return this.fee;
+    }
+
+    public Money calculateMovieFee(Screening screening){
+        return fee.minus(this.discountPolicy.calculateDiscountAmount(screening));
+    }
+}

src/main/java/com/study/object/chapter02/movie/NonDiscountPolicy.java

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+package com.study.object.chapter02.movie;
+
+public class NonDiscountPolicy implements DiscountPolicy{
+
+    @Override
+    public Money calculateDiscountAmount(Screening screening) {
+        return Money.ZERO;
+    }
+}

src/main/java/com/study/object/chapter02/movie/PercentDiscountPolicy.java

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+package com.study.object.chapter02.movie;
+
+public class PercentDiscountPolicy extends DefaultDiscountPolicy{
+    private double percent;
+
+    public PercentDiscountPolicy(double percent, DiscountCondition... conditions) {
+        super(conditions);
+        this.percent = percent;
+    }
+
+    @Override
+    public Money getDiscountAmount(Screening screening) {
+        return screening.getMovieFee().times(percent);
+    }
+}

src/main/java/com/study/object/chapter02/movie/PeriodCondition.java

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+package com.study.object.chapter02.movie;
+
+import java.time.DayOfWeek;
+import java.time.LocalTime;
+
+public class PeriodCondition implements DiscountCondition {
+    private DayOfWeek dayOfWeek;
+    private LocalTime startTime;
+    private LocalTime endTime;
+
+    public PeriodCondition(DayOfWeek dayOfWeek, LocalTime startTime, LocalTime endTime) {
+        this.dayOfWeek = dayOfWeek;
+        this.startTime = startTime;
+        this.endTime = endTime;
+    }
+
+    @Override
+    public boolean isSatisfiedBy(Screening screening) {
+        return screening.getStartTime().getDayOfWeek().equals(dayOfWeek) &&
+               screening.getStartTime().toLocalTime().compareTo(startTime) >= 0 &&
+               screening.getStartTime().toLocalTime().compareTo(endTime) <= 0;
+    }
+}

src/main/java/com/study/object/chapter02/movie/Reservation.java

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+package com.study.object.chapter02.movie;
+
+public class Reservation {
+    private Customer customer;
+    private Screening screening;
+    private Money fee;
+    private int audienceCount;
+
+    public Reservation(Customer customer, Screening screening, Money fee, int audienceCount) {
+        this.customer = customer;
+        this.screening = screening;
+        this.fee = fee;
+        this.audienceCount = audienceCount;
+    }
+}

src/main/java/com/study/object/chapter02/movie/Screening.java

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+package com.study.object.chapter02.movie;
+
+import java.time.LocalDateTime;
+
+public class Screening {
+
+    private Movie movie;
+    private int sequence;
+    private LocalDateTime whenScreened;
+
+    public Screening(Movie movie, int sequence, LocalDateTime whenScreened) {
+        this.movie = movie;
+        this.sequence = sequence;
+        this.whenScreened = whenScreened;
+    }
+
+    public LocalDateTime getStartTime(){
+        return this.whenScreened;
+    }
+
+    public boolean isSequence(int sequence){
+        return this.sequence == sequence;
+    }
+
+    public Money getMovieFee(){
+        return this.movie.getFee();
+    }
+
+    public Reservation reserve(Customer customer, int audienceCount){
+        return new Reservation(customer,this, calculateFee(audienceCount), audienceCount);
+    }
+
+    private Money calculateFee(int audienceCount){
+        return movie.calculateMovieFee(this).times(audienceCount);
+    }
+}

src/main/java/com/study/object/chapter02/movie/SequenceCondition.java

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+package com.study.object.chapter02.movie;
+
+public class SequenceCondition implements DiscountCondition{
+
+    private int sequence;
+
+    public SequenceCondition(int sequence) {
+        this.sequence = sequence;
+    }
+
+    @Override
+    public boolean isSatisfiedBy(Screening screening){
+        return screening.isSequence(sequence);
+    }
+}