3주차 미션 구현(김종하)

README.md

@@ -1 +1,28 @@
 # All-rounder Backend Study
+** 기능 별 구현 완료 **
+
+Program Start
+
+프린터 실행
+
+사용 가능 기능 표시
+
+User Input
+
+     사용자가 기능 선택 (1~4)
+
+Feature Execution
+
+    (1) 숫자 출력
+        출력할 숫자 입력
+        용지 크기 입력
+        ASCII 변환
+        용지 크기 맞춰 출력
+        잉크 차감
+    (2) 잉크 잔량 확인
+        현재 잉크 잔량 표시
+    (3) 잉크 교체
+        잉크 1000으로 초기화
+    (4) 프로그램 종료
+
+기능별 MVC 패턴 적용

src/main/java/mission/Application.java

@@ -1,7 +1,17 @@
 package mission;
 
+import mission.model.Printer;
+import mission.control.PrinterController;
+import mission.utils.AsciiGenerator;
+import mission.view.PrinterView;
+
 public class Application {
     public static void main(String[] args) {
-        //Todo: 프로그램 구현
+        AsciiGenerator asciiGenerator = new AsciiGenerator();
+        Printer printer = new Printer(asciiGenerator);
+        PrinterView view = new PrinterView();
+        PrinterController controller = new PrinterController(printer, view);
+
+        controller.start();
     }
-}
+}

src/main/java/mission/control/PrinterController.java

@@ -0,0 +1,59 @@
+package mission.control;
+
+import mission.model.Printer;
+import mission.view.PrinterView;
+
+public class PrinterController {
+    private final Printer printer;
+    private final PrinterView view;
+
+    public static final String PRINT_OPTION = "1";
+    public static final String CHECK_INK_OPTION = "2";
+    public static final String REPLACE_INK_OPTION = "3";
+    public static final String EXIT_OPTION = "4";
+
+    public PrinterController(Printer printer, PrinterView view) {
+        this.printer = printer;
+        this.view = view;
+    }
+
+    public void start() {
+        view.displayMessage("프린터를 실행합니다.");
+        while (true) {
+            String input = view.getUserInput("사용할 기능을 입력해주세요. 1) 출력, 2) 잉크 잔량 확인, 3) 잉크 교체, 4) 프로그램 종료");
+
+            switch (input) {
+                case PRINT_OPTION -> handlePrint();
+                case CHECK_INK_OPTION -> printer.checkInk();
+                case REPLACE_INK_OPTION -> printer.replaceInk();
+                case EXIT_OPTION -> {
+                    view.displayMessage("프로그램을 종료합니다.");
+                    return;
+                }
+                default -> view.displayMessage("올바른 번호를 입력해주세요.");
+            }
+        }
+    }
+
+    private void handlePrint() {
+        String input = view.getUserInput("출력할 문자를 입력해주세요.");
+        int paperSize = getPaperSize();
+
+        try {
+            printer.print(input, paperSize);
+        } catch (IllegalStateException e) {
+            view.displayError(e.getMessage());
+        }
+    }
+
+    private int getPaperSize() {
+        while (true) {
+            String paperSizeInput = view.getUserInput("용지 크기를 입력해주세요.");
+            try {
+                return Integer.parseInt(paperSizeInput);
+            } catch (NumberFormatException e) {
+                view.displayMessage("숫자만 입력 가능합니다.");
+            }
+        }
+    }
+}

src/main/java/mission/model/Printer.java

@@ -0,0 +1,55 @@
+package mission.model;
+
+import mission.utils.AsciiGenerator;
+
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+public class Printer {
+    private static final int MAX_INK = 1000;
+    private int ink = MAX_INK;
+    private final AsciiGenerator asciiGenerator;
+
+    public Printer(AsciiGenerator asciiGenerator) {
+        this.asciiGenerator = asciiGenerator;
+    }
+
+    public void print(String input, int paperSize) {
+        consumeInk(input.length(), paperSize);
+        String ascii = generateAscii(input);
+        System.out.println(ascii);
+        System.out.println("잉크 잔량: " + ink + "/" + MAX_INK);
+    }
+
+    public void checkInk() {
+        System.out.println("잉크 잔량: " + ink + "/" + MAX_INK);
+    }
+
+    public void replaceInk() {
+        ink = MAX_INK;
+        System.out.println("잉크를 교체하였습니다.");
+    }
+
+    private void consumeInk(int inputLength, int paperSize) {
+        int requiredInk = inputLength * paperSize * 5;
+        if (ink < requiredInk) {
+            throw new IllegalStateException("잉크가 부족하여 인쇄할 수 없습니다.");
+        }
+        ink -= requiredInk;
+    }
+
+    private String generateAscii(String input) {
+        int numRows = asciiGenerator.getNumberAsciiDesign(0).size();
+
+        return IntStream.range(0, numRows)
+                .mapToObj(row -> input.chars()
+                        .mapToObj(c -> {
+                            int digit = Character.getNumericValue(c);
+                            List<String> design = asciiGenerator.getNumberAsciiDesign(digit);
+                            return design.get(row);
+                        })
+                        .collect(Collectors.joining(" ")))
+                .collect(Collectors.joining(System.lineSeparator()));
+    }
+}

src/main/java/mission/utils/AsciiGenerator.java

@@ -13,29 +13,33 @@ public class AsciiGenerator {
     private final List<List<String>> data;
 
     static private final List<String> fileNames = List.of(
-            "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"
+            "zero", "one", "two", "three", "four", "five",
+            "six", "seven", "eight", "nine"
     );
 
     public AsciiGenerator() {
         data = new ArrayList<>();
-        fileNames.forEach(fileName -> {
-            try {
-                Path path = Paths.get(Objects.requireNonNull(
-                        getClass().getClassLoader().getResource("numberAsciiDesign/" + fileName + ".txt")
-                ).toURI());
-                String content = Files.readString(path);
-                data.add(List.of(content.split("\n")));
-            } catch (URISyntaxException | IOException e) {
-                throw new IllegalStateException("[ERROR] 아스키아트를 로드하지 못했습니다.");
-            }
-        });
+        fileNames.forEach(this::loadAsciiFile);
     }
 
-    public List<String> getNumberAsciiDesign(int number) {
+    private void loadAsciiFile(String fileName) {
         try {
-            return data.get(number);
-        } catch (IndexOutOfBoundsException e) {
-            throw new IllegalStateException("[ERROR] 범위를 초과했습니다. ");
+            Path path = Paths.get(Objects.requireNonNull(
+                    getClass().getClassLoader().getResource("numberAsciiDesign/" + fileName + ".txt")
+            ).toURI());
+            String content = Files.readString(path);
+
+            List<String> lines = List.of(content.split("\\R"));
+            data.add(lines);
+        } catch (URISyntaxException | IOException e) {
+            throw new IllegalStateException("[ERROR] 아스키 아트를 로드하지 못했습니다.");
+        }
+    }
+
+    public List<String> getNumberAsciiDesign(int number) {
+        if (number < 0 || number >= data.size()) {
+            throw new IllegalStateException("[ERROR] 범위를 초과했습니다.");
         }
+        return data.get(number);
     }
-}
+}

src/main/java/mission/view/PrinterView.java

@@ -0,0 +1,20 @@
+package mission.view;
+
+import java.util.Scanner;
+
+public class PrinterView {
+    private final Scanner scanner = new Scanner(System.in);
+
+    public String getUserInput(String message) {
+        System.out.println(message);
+        return scanner.nextLine().trim();
+    }
+
+    public void displayMessage(String message) {
+        System.out.println(message);
+    }
+
+    public void displayError(String message) {
+        System.out.println("[ERROR] " + message);
+    }
+}