ch01: renderPlainText 함수 안에 amountFor 제거

Author: IamGroooooot

src/main/kotlin/chapter01/Statement.kt

@@ -57,32 +57,6 @@ fun statement(invoice: Invoice, plays: Plays): String {
 }
 
 private fun renderPlainText(data: StatementData, plays: Plays): String {
-    fun amountFor(aPerformance: EnrichedPerformance): Int {
-        var result = 0
-        when (aPerformance.play.type) {
-            "tragedy" -> {
-                result = 40000
-                if (aPerformance.audience > 30) {
-                    result += 1000 * (aPerformance.audience - 30)
-                }
-            }
-
-            "comedy" -> {
-                result = 30000
-                if (aPerformance.audience > 20) {
-                    result += 10000 + 500 * (aPerformance.audience - 20)
-                }
-                result += 300 * aPerformance.audience
-            }
-
-            else -> {
-                throw Error("알 수 없는 장르: ${aPerformance.play.type}")
-            }
-        }
-
-        return result
-    }
-
     fun volumeCreditsFor(aPerformance: EnrichedPerformance): Int {
         var result = maxOf(aPerformance.audience - 30, 0)
         if (aPerformance.play.type == "comedy") result += aPerformance.audience / 5
@@ -104,15 +78,15 @@ private fun renderPlainText(data: StatementData, plays: Plays): String {
     fun totalAmount(): Int {
         var result = 0
         for (perf in data.performances) {
-            result += amountFor(perf)
+            result += perf.amount
         }
         return result
     }
 
     var result = "청구 내역 (고객명: ${data.customer})\n"
     for (perf in data.performances) {
         // 청구 내역을 출력한다.
-        result += "  ${perf.play.name}: ${usd(amountFor(perf))} (${perf.audience}석)\n"
+        result += "  ${perf.play.name}: ${usd(perf.amount)} (${perf.audience}석)\n"
     }
     result += "총액: ${usd(totalAmount())}\n"
     result += "적립 포인트: ${totalVolumeCredits()}점"