[1장_김명석] Pull Request

src/main/java/legacy/kms/chapter01/Audience.java

@@ -1,6 +1,6 @@
 package legacy.kms.chapter01;
 
-public class Audience {
+class Audience {
 
     private final Bag bag;
 

src/main/java/legacy/kms/chapter01/Bag.java

@@ -1,6 +1,6 @@
 package legacy.kms.chapter01;
 
-public class Bag {
+class Bag {
 
     private Long amount;
     private Invitation invitation;

src/main/java/legacy/kms/chapter01/Invitation.java

@@ -2,7 +2,7 @@
 
 import java.time.LocalDateTime;
 
-public class Invitation {
+class Invitation {
 
     private LocalDateTime when;
 }

src/main/java/legacy/kms/chapter01/Theater.java

@@ -1,6 +1,6 @@
 package legacy.kms.chapter01;
 
-public class Theater {
+class Theater {
 
     private final TicketSeller ticketSeller;
 

src/main/java/legacy/kms/chapter01/Ticket.java

@@ -1,6 +1,6 @@
 package legacy.kms.chapter01;
 
-public class Ticket {
+class Ticket {
 
     private Long fee;
 

src/main/java/legacy/kms/chapter01/TicketOffice.java

@@ -4,7 +4,7 @@
 import java.util.Arrays;
 import java.util.List;
 
-public class TicketOffice {
+class TicketOffice {
 
     private Long amount;
     private final List<Ticket> tickets = new ArrayList<>();

src/main/java/legacy/kms/chapter01/TicketSeller.java

@@ -1,6 +1,6 @@
 package legacy.kms.chapter01;
 
-public class TicketSeller {
+class TicketSeller {
 
     private final TicketOffice ticketOffice;
 

src/main/kotlin/kms/chapter01/Audience.kt

@@ -0,0 +1,14 @@
+package kms.chapter01
+
+internal class Audience(private val bag: Bag) {
+
+    fun buy(ticket: Ticket): Long {
+        return if (bag.hasInvitation()) {
+            bag.setTicket(ticket)
+            0L
+        } else {
+            bag.minusAmount(ticket.fee)
+            ticket.fee
+        }
+    }
+}

src/main/kotlin/kms/chapter01/Bag.kt

@@ -0,0 +1,27 @@
+package kms.chapter01
+
+internal class Bag(
+    private var amount: Long = 0,
+    private val invitation: Invitation? = null,
+    private var ticket: Ticket? = null,
+) {
+    fun hasInvitation(): Boolean {
+        return invitation != null
+    }
+
+    fun hasTicket(): Boolean {
+        return ticket != null
+    }
+
+    fun setTicket(ticket: Ticket?) {
+        this.ticket = ticket
+    }
+
+    fun minusAmount(amount: Long) {
+        this.amount = this.amount - amount
+    }
+
+    fun plusAmount(amount: Long) {
+        this.amount = this.amount + amount
+    }
+}

src/main/kotlin/kms/chapter01/Invitation.kt

@@ -0,0 +1,7 @@
+package kms.chapter01
+
+import java.time.LocalDateTime
+
+internal class Invitation(
+    private val whenDateTime: LocalDateTime,
+)

src/main/kotlin/kms/chapter01/Theater.kt

@@ -0,0 +1,9 @@
+package kms.chapter01
+
+internal class Theater(
+    private val ticketSeller: TicketSeller,
+) {
+    fun enter(audience: Audience) {
+        ticketSeller.sellTo(audience)
+    }
+}

src/main/kotlin/kms/chapter01/Ticket.kt

@@ -0,0 +1,5 @@
+package kms.chapter01
+
+internal class Ticket(
+    val fee: Long = 0,
+)

src/main/kotlin/kms/chapter01/TicketOffice.kt

@@ -0,0 +1,31 @@
+package kms.chapter01
+
+import kotlin.collections.ArrayList
+
+internal class TicketOffice constructor(
+    private var amount: Long = 0L,
+    private val tickets: MutableList<Ticket> = ArrayList(),
+) {
+    constructor(amount: Long, vararg tickets: Ticket) : this(
+        amount,
+        ArrayList<Ticket>().apply {
+            addAll(tickets.toList())
+        },
+    )
+
+    fun getTicket(): Ticket? {
+        return if (tickets.isNotEmpty()) {
+            tickets.removeAt(0)
+        } else {
+            null
+        }
+    }
+
+    fun minusAmount(amount: Long) {
+        this.amount = this.amount - amount
+    }
+
+    fun plusAmount(amount: Long) {
+        this.amount = this.amount + amount
+    }
+}

src/main/kotlin/kms/chapter01/TicketSeller.kt

@@ -0,0 +1,14 @@
+package kms.chapter01
+
+internal class TicketSeller(
+    private val ticketOffice: TicketOffice,
+) {
+
+    fun sellTo(audience: Audience) {
+        val ticket = ticketOffice.getTicket()
+        if (ticket != null) {
+            val amount = audience.buy(ticket)
+            ticketOffice.plusAmount(amount)
+        }
+    }
+}