[Feat/#25] Schedule Picker 작성

Noostak_iOS/Noostak_iOS/Global/Components/SchedulePicker/SchedulePicker.swift

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+//
+//  SchedulePicker.swift
+//  Noostak_iOS
+//
+//  Created by 오연서 on 1/10/25.
+//
+
+import UIKit
+
+final class SchedulePicker: UICollectionView {
+    enum Mode {
+        case editMode
+        case readMode
+    }
+
+    private let layout = SchedulePickerLayout()
+    private let timeHeaders: [String]
+    private let dateHeaders: [String]
+    private let mode: Mode
+    private var selectedCells: Set<IndexPath> = [] // edit Mode
+    private var cellAvailability: [IndexPath: Int] = [:] // read Mode
+
+    init(timeHeaders: [String], dateHeaders: [String], mode: Mode) {
+        self.timeHeaders = timeHeaders
+        self.dateHeaders = dateHeaders
+        self.mode = mode
+        super.init(frame: .zero, collectionViewLayout: layout)
+        self.layout.configure(totalRows: timeHeaders.count + 1, totalColumns: dateHeaders.count + 1)
+        self.register(SchedulePickerCell.self, forCellWithReuseIdentifier: SchedulePickerCell.identifier)
+        self.cellAvailability = calculateCellAvailability(totalRows: timeHeaders.count + 1,
+                                                          totalColumns: dateHeaders.count + 1,
+                                                          //Fix: mockMemberStartTime 변경 필요
+                                                          startTimes: mockMemberStartTime)
+    }
+
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    func addSelectedCell(at indexPath: IndexPath) {
+        guard mode == .editMode else { return }
+        if let cell = cellForItem(at: indexPath) as? SchedulePickerCell {
+            cell.isSelectedCell.toggle()
+            if cell.isSelectedCell {
+                selectedCells.insert(indexPath)
+            } else {
+                selectedCells.remove(indexPath)
+            }
+        }
+    }
+
+    func configureCellBackground(_ cell: SchedulePickerCell, for indexPath: IndexPath, participants: Int) {
+        guard mode == .readMode else { return }
+        let count = cellAvailability[indexPath, default: 0]
+        let ratio = Float(count) / Float(participants)
+
+        switch ratio {
+        case 0.01...0.2:
+            cell.backgroundColor = .appBlue50
+        case 0.2...0.4:
+            cell.backgroundColor = .appBlue200
+        case 0.4...0.6:
+            cell.backgroundColor = .appBlue400
+        case 0.6...0.8:
+            cell.backgroundColor = .appBlue700
+        case 0.8...1:
+            cell.backgroundColor = .appBlue800
+        default:
+            cell.backgroundColor = .clear
+        }
+    }
+}
+
+/// .ReadMode 색상 반환 로직
+extension SchedulePicker {
+    ///각 시간에 대한 가능 인원 계산
+    private func calculateCellAvailability(totalRows: Int, totalColumns: Int, startTimes: [String]) -> [IndexPath: Int] {
+        var cellAvailability: [IndexPath: Int] = [:]
+        let dateTimeMapping = createDateTimeMapping(totalRows: totalRows, totalColumns: totalColumns)
+        for startTime in startTimes {
+            if let indexPath = dateTimeMapping[startTime] {
+                cellAvailability[indexPath, default: 0] += 1
+            }
+        }
+        return cellAvailability
+    }
+
+    /// 시각 - cell 매핑
+    private func createDateTimeMapping(totalRows: Int, totalColumns: Int) -> [String: IndexPath] {
+        var mapping: [String: IndexPath] = [:]
+        //FIX: mockDateList 변경 필요
+        let dates = mockDateList.map { String($0.prefix(10)) }
+
+        for row in 1..<totalRows {
+            for column in 1..<totalColumns {
+                let time = self.timeHeaders[row - 1] // 시간
+                guard column - 1 < dates.count else { continue }
+                let date = dates[column - 1] // 날짜
+                let combinedKey = "\(date)T\(time):00:00"
+                let indexPath = IndexPath(item: (row * totalColumns) + column, section: 0)
+                mapping[combinedKey] = indexPath
+            }
+        }
+        return mapping
+    }
+
+    func reloadCellBackgrounds() {
+        self.cellAvailability = calculateCellAvailability(totalRows: self.timeHeaders.count + 1,
+                                                          totalColumns: self.dateHeaders.count + 1,
+                                                          startTimes: mockMemberStartTime)
+        self.reloadData()
+    }
+}

Noostak_iOS/Noostak_iOS/Global/Components/SchedulePicker/SchedulePickerCell.swift

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+//
+//  SchedulePickerCell.swift
+//  Noostak_iOS
+//
+//  Created by 오연서 on 1/10/25.
+//
+
+import UIKit
+
+final class SchedulePickerCell: UICollectionViewCell {
+
+    static let identifier = "SchedulePickerCell"
+
+    private var textLabel = UILabel()
+    var isSelectedCell: Bool = false {
+        didSet {
+            backgroundColor = isSelectedCell ? .appBlue400 : .appWhite
+        }
+    }
+
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        setupCell()
+        setUpHierarchy()
+        setUpUI()
+        setUpLayout()
+    }
+
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    private func setUpHierarchy() {
+        self.addSubview(textLabel)
+    }
+
+    private func setUpUI() {
+        textLabel.do {
+            $0.font = .PretendardStyle.c4_r.font
+            $0.numberOfLines = 0
+            $0.textAlignment = .center
+            $0.textColor = .appGray600
+        }
+    }
+
+    private func setUpLayout() {
+        textLabel.snp.makeConstraints {
+            $0.center.equalToSuperview()
+        }
+    }
+
+    private func setupCell() {
+        self.backgroundColor = .appWhite
+        self.layer.borderWidth = 0.5
+        self.layer.borderColor = UIColor.appGray200.cgColor
+    }
+
+    func configureHeader(for indexPath: IndexPath, dateHeaders: [String], timeHeaders: [String]) {
+        let totalRows = timeHeaders.count + 1
+        let totalColumns = dateHeaders.count + 1
+        let row = indexPath.item / totalColumns
+        let column = indexPath.item % totalColumns
+
+        let isTopLeft = indexPath.item == 0
+        let isTopRight = indexPath.item == totalColumns - 1
+        let isBottomLeft = indexPath.item == (totalRows - 1) * totalColumns
+        let isBottomRight = indexPath.item == totalRows * totalColumns - 1
+
+        /// dateHeader, timeHeader text binding
+        if row == 0, column > 0 {
+            self.textLabel.text = dateHeaders[column - 1]
+        } else if column == 0, row > 0 {
+            self.textLabel.text = "\(timeHeaders[row - 1])시"
+        } else {
+            self.textLabel.text = ""
+        }
+
+        /// 테이블 모서리 둥글게
+        if isTopLeft || isTopRight || isBottomLeft || isBottomRight {
+            self.layer.cornerRadius = 10
+            self.layer.masksToBounds = true
+            self.layer.borderColor = UIColor.appGray200.cgColor
+            if isTopLeft {
+                self.layer.maskedCorners = [.layerMinXMinYCorner]
+            } else if isTopRight {
+                self.layer.maskedCorners = [.layerMaxXMinYCorner]
+            } else if isBottomLeft {
+                self.layer.maskedCorners = [.layerMinXMaxYCorner]
+            } else if isBottomRight {
+                self.layer.maskedCorners = [.layerMaxXMaxYCorner]
+            }
+        } else {
+            self.layer.cornerRadius = 0
+        }
+    }
+}

Noostak_iOS/Noostak_iOS/Global/Components/SchedulePicker/SchedulePickerLayout.swift

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+//
+//  SchedulePickerLayout.swift
+//  Noostak_iOS
+//
+//  Created by 오연서 on 1/10/25.
+//
+
+import UIKit
+
+final class SchedulePickerLayout: UICollectionViewFlowLayout {
+    private let fixedFirstColumnWidth: CGFloat = 42
+    private let fixedFirstRowHeight: CGFloat = 36
+
+    private var totalRows: Int = 0
+    private var totalColumns: Int = 0
+    private let minimumSpacing: CGFloat = 0
+
+    func configure(totalRows: Int = 0, totalColumns: Int = 0) {
+        self.totalRows = totalRows
+        self.totalColumns = totalColumns
+        invalidateLayout()
+    }
+
+    override func prepare() {
+        super.prepare()
+        guard let collectionView = collectionView else { return }
+        let remainingWidth = collectionView.bounds.width - fixedFirstColumnWidth - CGFloat(totalColumns - 1) * minimumSpacing
+        let dynamicColumnWidth = remainingWidth / CGFloat(totalColumns - 1)
+        let dynamicRowHeight = 32.0
+
+        itemSize = CGSize(width: dynamicColumnWidth, height: dynamicRowHeight)
+        minimumLineSpacing = 0
+        minimumInteritemSpacing = 0
+        sectionInset = .zero
+    }
+
+    override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
+        let attributes = super.layoutAttributesForElements(in: rect)
+        attributes?.forEach { layoutAttribute in
+            let indexPath = layoutAttribute.indexPath
+            let column = indexPath.item % totalColumns
+            let row = indexPath.item / totalColumns
+
+            // 첫 번째 열의 너비 고정, 열 간 간격 조정
+            if column == 0 {
+                layoutAttribute.frame.size.width = fixedFirstColumnWidth
+                layoutAttribute.frame.origin.x = 0
+            } else { // 두 번째 열 이후
+                let previousColumnRight = fixedFirstColumnWidth + CGFloat(column - 1) * (itemSize.width + minimumInteritemSpacing)
+                layoutAttribute.frame.origin.x = previousColumnRight
+            }
+
+            // 첫 번째 행의 높이 고정, 행 간 간격 조정
+            if indexPath.item < totalColumns {
+                layoutAttribute.frame.size.height = fixedFirstRowHeight
+                layoutAttribute.frame.origin.y = 0
+            } else { // 두 번째 행 이후
+                let previousRowBottom = fixedFirstRowHeight + CGFloat(row - 1) * (itemSize.height + minimumLineSpacing)
+                layoutAttribute.frame.origin.y = previousRowBottom
+            }
+        }
+        return attributes
+    }
+}