[Feature] 예매 하기 및 예매 정보 확인 기능 구현

MovieBooking/Data/DataSources/BookingDataSource.swift

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+//
+//  BookingDataSource.swift
+//  MovieBooking
+//
+//  Created by 홍석현 on 10/19/25.
+//
+
+import Foundation
+
+protocol BookingDataSourceProtocol {
+  func saveBooking(_ bookingInfo: BookingInfo) async throws -> BookingInfo
+  func fetchAllBookings() async throws -> [BookingInfo]
+  func deleteBooking(id: String) async throws
+}
+
+final class LocalBookingDataSource: BookingDataSourceProtocol {
+  private let userDefaults: UserDefaults
+  private let bookingsKey = "com.moviebooking.bookings"
+
+  init(userDefaults: UserDefaults = .standard) {
+    self.userDefaults = userDefaults
+  }
+
+  func saveBooking(_ bookingInfo: BookingInfo) async throws -> BookingInfo {
+    var bookings = try await fetchAllBookings()
+    bookings.append(bookingInfo)
+
+    let encoder = JSONEncoder()
+    let data = try encoder.encode(bookings)
+    userDefaults.set(data, forKey: bookingsKey)
+
+    return bookingInfo
+  }
+
+  func fetchAllBookings() async throws -> [BookingInfo] {
+    guard let data = userDefaults.data(forKey: bookingsKey) else {
+      return []
+    }
+
+    let decoder = JSONDecoder()
+    return try decoder.decode([BookingInfo].self, from: data)
+  }
+
+  func deleteBooking(id: String) async throws {
+    var bookings = try await fetchAllBookings()
+    bookings.removeAll { $0.id == id }
+
+    let encoder = JSONEncoder()
+    let data = try encoder.encode(bookings)
+    userDefaults.set(data, forKey: bookingsKey)
+  }
+}

MovieBooking/Data/Repository/BookingRepository.swift

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+//
+//  BookingRepository.swift
+//  MovieBooking
+//
+//  Created by 홍석현 on 10/19/25.
+//
+
+import Foundation
+
+struct BookingRepository: BookingRepositoryProtocol {
+  private let dataSource: BookingDataSourceProtocol
+
+  init(dataSource: BookingDataSourceProtocol = LocalBookingDataSource()) {
+    self.dataSource = dataSource
+  }
+
+  func createBooking(_ bookingInfo: BookingInfo) async throws -> BookingInfo {
+    try await dataSource.saveBooking(bookingInfo)
+  }
+
+  func fetchBookings() async throws -> [BookingInfo] {
+    try await dataSource.fetchAllBookings()
+  }
+
+  func deleteBooking(id: String) async throws {
+    try await dataSource.deleteBooking(id: id)
+  }
+}

MovieBooking/Domain/Entity/BookingInfo.swift

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+//
+//  BookingInfo.swift
+//  MovieBooking
+//
+//  Created by 홍석현 on 10/19/25.
+//
+
+import Foundation
+
+struct BookingInfo: Identifiable, Codable, Equatable {
+  let id: String
+  let movieId: String
+  let movieTitle: String
+  let posterPath: String
+  let theaterId: Int
+  let theaterName: String
+  let showDate: Date        // 상영 날짜
+  let showTime: String      // 상영 시간 (예: "14:30")
+  let numberOfPeople: Int
+  let totalPrice: Int
+  let bookedAt: Date        // 예매한 날짜
+
+  init(
+    id: String = UUID().uuidString,
+    movieId: String,
+    movieTitle: String,
+    posterPath: String,
+    theaterId: Int,
+    theaterName: String,
+    showDate: Date,
+    showTime: String,
+    numberOfPeople: Int,
+    totalPrice: Int,
+    bookedAt: Date = Date()
+  ) {
+    self.id = id
+    self.movieId = movieId
+    self.movieTitle = movieTitle
+    self.posterPath = posterPath
+    self.theaterId = theaterId
+    self.theaterName = theaterName
+    self.showDate = showDate
+    self.showTime = showTime
+    self.numberOfPeople = numberOfPeople
+    self.totalPrice = totalPrice
+    self.bookedAt = bookedAt
+  }
+
+  /// 표시용 상영 날짜 (예: "2025년 10월 20일")
+  var displayShowDate: String {
+    let formatter = DateFormatter()
+    formatter.locale = Locale(identifier: "ko_KR")
+    formatter.dateFormat = "yyyy년 M월 d일 (E)"
+    return formatter.string(from: showDate)
+  }
+
+  /// 전체 상영 정보 (예: "2025년 10월 20일 14:30")
+  var fullShowDateTime: String {
+    "\(displayShowDate) \(showTime)"
+  }
+}

MovieBooking/Domain/Entity/MovieTheater.swift

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+//
+//  MovieTheater.swift
+//  MovieBooking
+//
+//  Created by 홍석현 on 10/18/25.
+//
+
+import Foundation
+
+struct MovieTheater: Identifiable, Equatable {
+  let id: Int
+  let name: String
+}

MovieBooking/Domain/Entity/ShowTime.swift

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+//
+//  ShowTime.swift
+//  MovieBooking
+//
+//  Created by 홍석현 on 10/19/25.
+//
+
+import Foundation
+
+struct ShowTime: Identifiable, Codable, Equatable {
+  let id: String
+  let date: Date
+  let time: String
+
+  init(id: String = UUID().uuidString, date: Date, time: String) {
+    self.id = id
+    self.date = date
+    self.time = time
+  }
+
+  /// 표시용 날짜 문자열 (예: "2025년 10월 20일")
+  var displayDate: String {
+    let formatter = DateFormatter()
+    formatter.locale = Locale(identifier: "ko_KR")
+    formatter.dateFormat = "yyyy년 M월 d일"
+    return formatter.string(from: date)
+  }
+
+  /// 표시용 요일 (예: "월요일")
+  var displayWeekday: String {
+    let formatter = DateFormatter()
+    formatter.locale = Locale(identifier: "ko_KR")
+    formatter.dateFormat = "EEEE"
+    return formatter.string(from: date)
+  }
+
+  /// 표시용 짧은 날짜 (예: "10/20 (월)")
+  var displayShortDate: String {
+    let formatter = DateFormatter()
+    formatter.locale = Locale(identifier: "ko_KR")
+    formatter.dateFormat = "M/d"
+    let dateStr = formatter.string(from: date)
+
+    formatter.dateFormat = "E"
+    let weekdayStr = formatter.string(from: date)
+
+    return "\(dateStr) (\(weekdayStr))"
+  }
+
+  /// 전체 표시 (예: "2025년 10월 20일 14:30")
+  var fullDisplay: String {
+    "\(displayDate) \(time)"
+  }
+}

MovieBooking/Domain/Repository/BookingRepositoryProtocol.swift

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+//
+//  BookingRepositoryProtocol.swift
+//  MovieBooking
+//
+//  Created by 홍석현 on 10/19/25.
+//
+
+import Foundation
+import Dependencies
+
+protocol BookingRepositoryProtocol {
+  func createBooking(_ bookingInfo: BookingInfo) async throws -> BookingInfo
+  func fetchBookings() async throws -> [BookingInfo]
+  func deleteBooking(id: String) async throws
+}
+
+private enum BookingRepositoryKey: DependencyKey {
+  static let liveValue: any BookingRepositoryProtocol = BookingRepository()
+  static let previewValue: any BookingRepositoryProtocol = BookingRepository()
+  static let testValue: any BookingRepositoryProtocol = BookingRepository()
+}
+
+extension DependencyValues {
+  var bookingRepository: BookingRepositoryProtocol {
+    get { self[BookingRepositoryKey.self] }
+    set { self[BookingRepositoryKey.self] = newValue }
+  }
+}

MovieBooking/Domain/UseCase/CreateBookingUseCase.swift

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+//
+//  CreateBookingUseCase.swift
+//  MovieBooking
+//
+//  Created by 홍석현 on 10/19/25.
+//
+
+import Foundation
+import Dependencies
+
+protocol CreateBookingUseCaseProtocol {
+  func execute(_ bookingInfo: BookingInfo) async throws -> BookingInfo
+}
+
+struct CreateBookingUseCase: CreateBookingUseCaseProtocol {
+  @Dependency(\.bookingRepository) var repository
+
+  func execute(_ bookingInfo: BookingInfo) async throws -> BookingInfo {
+    // 간단한 딜레이로 네트워크 호출 시뮬레이션
+    try await Task.sleep(nanoseconds: 500_000_000) // 0.5초
+
+    // Repository를 통해 저장
+    return try await repository.createBooking(bookingInfo)
+  }
+}
+
+private enum CreateBookingUseCaseKey: DependencyKey {
+  static let liveValue: CreateBookingUseCaseProtocol = CreateBookingUseCase()
+  static let previewValue: CreateBookingUseCaseProtocol = CreateBookingUseCase()
+  static let testValue: CreateBookingUseCaseProtocol = CreateBookingUseCase()
+}
+
+extension DependencyValues {
+  var createBookingUseCase: CreateBookingUseCaseProtocol {
+    get { self[CreateBookingUseCaseKey.self] }
+    set { self[CreateBookingUseCaseKey.self] = newValue }
+  }
+}

MovieBooking/Domain/UseCase/FetchBookingsUseCase.swift

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+//
+//  FetchBookingsUseCase.swift
+//  MovieBooking
+//
+//  Created by 홍석현 on 10/19/25.
+//
+
+import Foundation
+import Dependencies
+
+protocol FetchBookingsUseCaseProtocol {
+  func execute() async throws -> [BookingInfo]
+}
+
+struct FetchBookingsUseCase: FetchBookingsUseCaseProtocol {
+  @Dependency(\.bookingRepository) var repository
+
+  func execute() async throws -> [BookingInfo] {
+    try await Task.sleep(nanoseconds: 300_000_000) // 0.3초
+    let bookings = try await repository.fetchBookings()
+
+    // 예매 날짜 최신순으로 정렬
+    return bookings.sorted { $0.bookedAt > $1.bookedAt }
+  }
+}
+
+private enum FetchBookingsUseCaseKey: DependencyKey {
+  static let liveValue: FetchBookingsUseCaseProtocol = FetchBookingsUseCase()
+  static let previewValue: FetchBookingsUseCaseProtocol = FetchBookingsUseCase()
+  static let testValue: FetchBookingsUseCaseProtocol = FetchBookingsUseCase()
+}
+
+extension DependencyValues {
+  var fetchBookingsUseCase: FetchBookingsUseCaseProtocol {
+    get { self[FetchBookingsUseCaseKey.self] }
+    set { self[FetchBookingsUseCaseKey.self] = newValue }
+  }
+}