Scrumdinger 분석하기 04./scrum/DetailEditView.swift

import SwiftUI
import ThemeKit
import SwiftData

struct DetailEditView: View {
    let scrum: DailyScrum

    @State private var attendeeName = ""
    @State private var title: String
    @State private var lengthInMinutesAsDouble: Double
    @State private var attendees: [Attendee]
    @State private var theme: Theme
    @State private var errorWrapper: ErrorWrapper?

    @Environment(\.dismiss) private var dismiss
    @Environment(\.modelContext) private var context

    private let isCreatingScrum: Bool

    init(scrum: DailyScrum?) {
        let scrumToEdit: DailyScrum
        if let scrum {
            scrumToEdit = scrum
            isCreatingScrum = false
        } else {
            scrumToEdit = DailyScrum(title: "", attendees: [], lengthInMinutes: 5, theme: .sky)
            isCreatingScrum = true
        }
        
        self.scrum = scrumToEdit
        self.title = scrumToEdit.title
        self.lengthInMinutesAsDouble = scrumToEdit.lengthInMinutesAsDouble
        self.attendees = scrumToEdit.attendees
        self.theme = scrumToEdit.theme
    }
    
    var body: some View {
        Form {
            Section(header: Text("Meeting Info")) {
                TextField("Title", text: $title)
                HStack {
                    Slider(value: $lengthInMinutesAsDouble, in: 5...30, step: 1) {
                        Text("Length")
                    }
                    .accessibilityValue("\(String(format: "%.0f", lengthInMinutesAsDouble)) minutes")
                    Spacer()
                    Text("\(String(format: "%.0f", lengthInMinutesAsDouble)) minutes")
                        .accessibilityHidden(true)
                }
                ThemePicker(selection: $theme)
            }
            Section(header: Text("참석자 목록")) {
                ForEach(attendees) { attendee in
                    Text(attendee.name)
                }
                .onDelete { indices in
                    attendees.remove(atOffsets: indices)
                }
                
                HStack {
                    TextField("새로운 참석자", text: $attendeeName)
                    Button(action: {
                        withAnimation {
                            let attendee = Attendee(name: attendeeName)
                            attendees.append(attendee)
                            attendeeName = ""
                        }
                    }) {
                        Image(systemName: "plus.circle.fill")
                            .accessibilityLabel("참석자 추가")
                    }
                    .disabled(attendeeName.isEmpty)
                }
            }
        }
        .toolbar {
            ToolbarItem(placement: .cancellationAction) {
                Button("Cancel") {
                    dismiss()
                }
            }
            ToolbarItem(placement: .confirmationAction) {
                Button("Done") {
                    do {
                        try saveEdits()
                        dismiss()
                    } catch {
                        errorWrapper = ErrorWrapper(error: error, guidance: "녹화 실패")
                    }
                }
            }
        }
        .sheet(item: $errorWrapper) {
            dismiss()
        } content: { wrapper in
            ErrorView(errorWrapper: wrapper)
        }
    }
    
    private func saveEdits() throws {
        scrum.title = title
        scrum.lengthInMinutesAsDouble = lengthInMinutesAsDouble
        scrum.attendees = attendees
        scrum.theme = theme
        
        if isCreatingScrum {
            context.insert(scrum)
        }
        
        try context.save()
    }
}

#Preview {
    @Previewable @Query(sort: \DailyScrum.title) var scrums: [DailyScrum]
    DetailEditView(scrum: DailyScrum.sampleData[0])
}

 

let scrum: DailyScrum

@State private var attendeeName = ""
@State private var title: String
@State private var lengthInMinutesAsDouble: Double
@State private var attendees: [Attendee]
@State private var theme: Theme
@State private var errorWrapper: ErrorWrapper?


// scrum 을 받아와서 각각의 속성 값으로 상태를 감지할 수 있게 @State 를 선언해두었다.

 

 

 

 

에러처리

.sheet(item: $errorWrapper) {
    dismiss()
} content: { wrapper in
    ErrorView(errorWrapper: wrapper)
}

 

 

 

dismiss 와 context