feat(station) 지하철 역 관련 기능

- 지하철 역 등록 및 삭제
- 노선에 등록된 역은 삭제 불가
- 중복된 지하철 역 이름이 등록 불가
- 지하철 역 이름은 2글자 이상
- 지하철 역의 목록을 조회 가능

Closes techeer-sv#4, techeer-sv#5, techeer-sv#6, techeer-sv#7, techeer-sv#8

src/main/java/subway/Application.java

@@ -2,9 +2,12 @@
 
 import java.util.Scanner;
 
+import subway.controller.MainController;
+
 public class Application {
     public static void main(String[] args) {
         final Scanner scanner = new Scanner(System.in);
-        // TODO: 프로그램 구현
+        MainController mainController = new MainController(scanner);
+        mainController.run();
     }
 }

src/main/java/subway/controller/MainController.java

@@ -0,0 +1,58 @@
+package subway.controller;
+
+import java.util.Scanner;
+
+import subway.service.SubwayService;
+import subway.view.LineView;
+import subway.view.MainView;
+import subway.view.SectionView;
+import subway.view.StationView;
+
+public class MainController {
+	private final StationController stationController;
+	private final LineController lineController;
+	private final SectionController sectionController;
+	private final MainView mainView;
+	private final Scanner scanner;
+	private final SubwayService subwayService;
+
+	public MainController(Scanner scanner) {
+		this.scanner = scanner;
+		this.stationController = new StationController(scanner);
+		this.lineController = new LineController(scanner);
+		this.sectionController = new SectionController(scanner);
+		this.subwayService = new SubwayService();
+		this.mainView = new MainView();
+	}
+
+	public void run() {
+		subwayService.settingData();
+		selectSubway();
+	}
+
+	public void selectSubway() {
+		boolean quit = true;
+		while (quit){
+			mainView.printMainView();
+			mainView.printSelectView();
+			String command = scanner.nextLine().trim();
+			if (command.equals("1")) {
+				stationController.manageStation();
+			}
+			if (command.equals("2")) {
+				lineController.manageLine();
+			}
+			if (command.equals("3")) {
+				sectionController.manageSection();
+			}
+			if (command.equals("4")) {
+				sectionController.printLine();
+			}
+			if (command.equals("Q")) {
+				quit = false;
+			}
+		}
+	}
+
+
+}

src/main/java/subway/controller/StationController.java

@@ -0,0 +1,53 @@
+package subway.controller;
+
+import java.util.List;
+import java.util.Scanner;
+
+import subway.service.StationService;
+import subway.view.MainView;
+import subway.view.StationView;
+
+public class StationController {
+	private final StationView stationView;
+	private final MainView mainView;
+	private final StationService stationService;
+	private final Scanner scanner;
+
+	public StationController(Scanner scanner) {
+		this.scanner = scanner;
+		this.stationView = new StationView();
+		this.mainView = new MainView();
+		this.stationService = new StationService();
+	}
+
+	public void manageStation() {
+		boolean back = true;
+		while (back) {
+			stationView.printStationView();
+			mainView.printSelectView();
+			String command = scanner.nextLine().trim();
+			if (command.equals("1")) {
+				stationView.printAddStation();
+				String stationName = scanner.nextLine().trim();
+				stationService.addStation(stationName);
+				stationView.printSuccessAddStation();
+			}
+			if (command.equals("2")) {
+				stationView.printDeleteStation();
+				String stationName = scanner.nextLine().trim();
+				stationService.deleteStation(stationName);
+				stationView.printSuccessDeleteStation();
+			}
+			if (command.equals("3")) {
+				stationView.printSelectStation();
+				List<String> stations = stationService.getStations();
+				stationView.printStationList(stations);
+			}
+			if (command.equals("B")) {
+				back = false;
+			}
+		}
+	}
+
+
+}

src/main/java/subway/domain/Section.java

@@ -15,4 +15,8 @@ public Section(Line line) {
 	public void addStation(Station station) {
 		stations.add(station);
 	}
+
+	public List<Station> getStations() {
+		return stations;
+	}
 }

src/main/java/subway/domain/SectionRepository.java

@@ -8,4 +8,9 @@ public class SectionRepository {
 
 	public static void addSection(Section section) {sections.add(section);}
 
+	public static boolean isStationInSection(String stationName) {
+		return sections.stream()
+			.flatMap(section -> section.getStations().stream())
+			.anyMatch(station -> station.getName().equals(stationName));
+	}
 }

src/main/java/subway/domain/StationRepository.java

@@ -5,6 +5,8 @@
 import java.util.List;
 import java.util.Objects;
 
+import subway.view.error.StationErrorMessage;
+
 public class StationRepository {
     private static final List<Station> stations = new ArrayList<>();
 
@@ -19,4 +21,11 @@ public static void addStation(Station station) {
     public static boolean deleteStation(String name) {
         return stations.removeIf(station -> Objects.equals(station.getName(), name));
     }
+
+    public Station findStationByName(String name) {
+        return stations.stream()
+            .filter(station -> Objects.equals(station.getName(), name))
+            .findFirst()
+            .orElseThrow(() -> new IllegalArgumentException(StationErrorMessage.NOT_EXISTS.getMessage()));
+    }
 }

src/main/java/subway/service/StationService.java

@@ -0,0 +1,41 @@
+package subway.service;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import subway.domain.SectionRepository;
+import subway.domain.Station;
+import subway.domain.StationRepository;
+import subway.view.error.StationErrorMessage;
+
+public class StationService {
+	public void addStation(String stationName) {
+		if (stationName.length() < 2) {
+			throw new IllegalArgumentException(StationErrorMessage.WRONG_NAME.getMessage());
+		}
+
+		if (StationRepository.stations().stream()
+			.anyMatch(station -> station.getName().equals(stationName))) {
+			throw new IllegalArgumentException(StationErrorMessage.ALREADY_EXISTS.getMessage());
+		}
+
+		Station newStation = new Station(stationName);
+		StationRepository.addStation(newStation);
+	}
+
+	public void deleteStation(String stationName) {
+		if (SectionRepository.isStationInSection(stationName)) {
+			throw new IllegalArgumentException(StationErrorMessage.UN_REMOVABLE.getMessage());
+		}
+
+		if (!StationRepository.deleteStation(stationName)) {
+			throw new IllegalArgumentException(StationErrorMessage.NOT_EXISTS.getMessage());
+		}
+	}
+
+	public List<String> getStations() {
+		return StationRepository.stations().stream()
+			.map(Station::getName)
+			.collect(Collectors.toList());
+	}
+}

src/main/java/subway/view/StationView.java

@@ -0,0 +1,47 @@
+package subway.view;
+
+import java.util.List;
+
+public class StationView {
+	private static final String STATION = "## 역 관리 화면";
+	private static final String ADD_STATION = "1. 역 등록";
+	private static final String REMOVE_STATION = "2. 역 삭제";
+	private static final String VIEW_STATIONS = "3. 역 조회";
+	private static final String BACK = "B. 돌아가기";
+	private static final String ADD_STATION_NAME = "## 등록할 역 이름을 입력하세요.";
+	private static final String DELETE_STATION_NAME = "## 삭제할 역 이름을 입력하세요.";
+	private static final String SUCCESS_ADD_STATION = "[INFO] 지하철 역이 등록되었습니다.";
+	private static final String SUCCESS_DELETE_STATION = "[INFO] 지하철 역이 삭제되었습니다.";
+	private static final String SELECT_STATION = "## 역 목록";
+
+
+
+	public void printStationView() {
+		System.out.println(STATION + "\n" +
+			ADD_STATION + "\n" +
+			REMOVE_STATION + "\n" +
+			VIEW_STATIONS + "\n" +
+			BACK);
+	}
+
+	public void printAddStation() {
+		System.out.println(ADD_STATION_NAME);
+	}
+
+	public void printSuccessAddStation() {
+		System.out.println(SUCCESS_ADD_STATION);
+	}
+
+	public void printDeleteStation() {
+		System.out.println(DELETE_STATION_NAME);
+	}
+
+	public void printSuccessDeleteStation() {System.out.println(SUCCESS_DELETE_STATION);}
+
+	public void printSelectStation() {System.out.println(SELECT_STATION);}
+
+	public void printStationList(List<String> stations) {
+		stations.forEach(station -> System.out.println("[INFO] " + station));
+	}
+
+}

src/main/java/subway/view/error/StationErrorMessage.java

@@ -0,0 +1,18 @@
+package subway.view.error;
+
+public enum StationErrorMessage {
+	ALREADY_EXISTS("[ERROR] 중복된 이름입니다."),
+	NOT_EXISTS("[ERROR] 존재하지 않는 역입니다."),
+	UN_REMOVABLE("[ERROR] 노선이 등록되어 있는 역입니다."),
+	WRONG_NAME("[ERROR] 지하철 역 이름은 2글자 이상이어야 합니다.");
+
+	private String message;
+
+	StationErrorMessage(String message) {
+		this.message = message;
+	}
+
+	public String getMessage(){
+		return message;
+	}
+}