Merge pull request #22 from naneun/eddy-20

[iOS] 특정 시점을 입력하면 DayCreator가 해당 달의 �달력 날짜 정보를 반환함

iOS/Targets/Cherrybnb/Sources/Search/Model/Day.swift

@@ -0,0 +1,46 @@
+//
+//  Day.swift
+//  Cherrybnb
+//
+//  Created by Bumgeun Song on 2022/05/27.
+//  Copyright © 2022 Codesquad. All rights reserved.
+//
+
+import Foundation
+
+struct Day {
+    // Day가 나타내는 시점(일)
+    let date: Date
+
+    // Calendar에 보여지는 숫자
+    var number: String {
+        dateFormatter.string(from: date)
+    }
+
+    // Calendar에서 선택되었는지 여부
+    let isSelected: Bool
+
+    // 현재 이전 날짜인지 여부
+    let isPast: Bool
+
+    let dateFormatter: DateFormatter = {
+        let dateFormatter = DateFormatter()
+        dateFormatter.dateFormat = "d"
+        return dateFormatter
+    }()
+}
+
+struct Month {
+    let date: Date
+
+    var title: String {
+        dateFormatter.string(from: date)
+    }
+
+    let dateFormatter: DateFormatter = {
+        let dateFormatter = DateFormatter()
+        dateFormatter.dateFormat = "yyyy년 MM월"
+        dateFormatter.locale = Locale(identifier: "ko_KR")
+        return dateFormatter
+    }()
+}

iOS/Targets/Cherrybnb/Sources/Search/Model/DayCreator.swift

@@ -0,0 +1,71 @@
+//
+//  DayCreator.swift
+//  Cherrybnb
+//
+//  Created by Bumgeun Song on 2022/05/27.
+//  Copyright © 2022 Codesquad. All rights reserved.
+//
+
+import Foundation
+
+enum CalendarError: Error {
+    case metadataGeneration
+    case offsetMonthGeneration
+}
+
+struct DayCreator {
+    let calendar = Calendar(identifier: .gregorian)
+
+    var selectedDate: Date?
+
+    // 기준일로부터 offset만큼 떨어진 달의 Day를 return.
+    func daysInMonth(for basedate: Date, monthOffset: Int) -> [Day] {
+        guard let firstDayOfMonth = calendar.date(from: calendar.dateComponents([.year, .month], from: basedate)),
+              let firstDayOfOffsetMonth = calendar.date(byAdding: .month, value: monthOffset, to: firstDayOfMonth) else {
+            print(CalendarError.offsetMonthGeneration)
+            return []
+        }
+
+        return daysInMonth(for: firstDayOfOffsetMonth)
+    }
+
+    // 기준일이 속한 달의 Day를 return.
+    func daysInMonth(for basedate: Date) -> [Day] {
+        guard let metadata = try? monthMetadata(for: basedate) else {
+            print(CalendarError.metadataGeneration)
+            return []
+        }
+
+        return (0..<metadata.numberOfDays).map { offset in
+            let date = calendar.date(byAdding: .day, value: offset, to: metadata.firstDay) ?? basedate
+            let isSelected = date == selectedDate
+            let isPast = date < basedate
+
+            return Day(date: date, isSelected: isSelected, isPast: isPast)
+        }
+    }
+
+    private func monthMetadata(for basedate: Date) throws -> MonthMetaData  {
+        guard let numberOfDaysInMonth = calendar.range(of: .day, in: .month, for: basedate)?.count,
+              let firstDayOfMonth = calendar.date(from: calendar.dateComponents([.year, .month], from: basedate)) else {
+            throw CalendarError.metadataGeneration
+        }
+
+        let weekDayOfFirstDay = calendar.component(.weekday, from: firstDayOfMonth)
+
+        return MonthMetaData(numberOfDays: numberOfDaysInMonth, firstDay: firstDayOfMonth, firstDayWeekday: weekDayOfFirstDay)
+    }
+}
+
+struct MonthCreator {
+    let calendar = Calendar(identifier: .gregorian)
+
+    func createMonth(for basedate: Date, monthOffset: Int) -> Month? {
+        guard let firstDayOfMonth = calendar.date(from: calendar.dateComponents([.year, .month], from: basedate)),
+              let firstDayOfOffsetMonth = calendar.date(byAdding: .month, value: monthOffset, to: firstDayOfMonth) else {
+            print(CalendarError.offsetMonthGeneration)
+            return nil
+        }
+        return Month(date: firstDayOfOffsetMonth)
+    }
+}

iOS/Targets/Cherrybnb/Sources/Search/Model/MonthMetaData.swift

@@ -0,0 +1,15 @@
+//
+//  MonthMetaData.swift
+//  Cherrybnb
+//
+//  Created by Bumgeun Song on 2022/05/27.
+//  Copyright © 2022 Codesquad. All rights reserved.
+//
+
+import Foundation
+
+struct MonthMetaData {
+    let numberOfDays: Int
+    let firstDay: Date
+    let firstDayWeekday: Int
+}

iOS/Targets/Cherrybnb/Sources/Search/ViewController/SearchRootViewController.swift

@@ -18,6 +18,7 @@ class SearchRootViewController: UIViewController {
         super.viewDidLoad()
         configureNavBar()
         askPermission()
+
     }
 
     override func viewWillAppear(_ animated: Bool) {