WidgetKit iOS 17+: Widget Interaktif dengan App Intents

import WidgetKit
import SwiftUI
import AppIntents

// Arsitektur didasarkan pada tiga komponen utama:
// 1. Widget Timeline Provider - menyediakan data
// 2. Widget View - menampilkan antarmuka dengan Button/Toggle
// 3. App Intent - menjalankan tindakan saat disentuh

struct TaskWidget: Widget {
    // Identifier unik widget
    let kind: String = "TaskWidget"

    var body: some WidgetConfiguration {
        // StaticConfiguration untuk widget tanpa parameter
        StaticConfiguration(
            kind: kind,
            provider: TaskTimelineProvider()
        ) { entry in
            TaskWidgetView(entry: entry)
                // Wajib untuk App Intents
                .containerBackground(.fill.tertiary, for: .widget)
        }
        .configurationDisplayName("Tugas")
        .description("Kelola tugas Anda dari layar utama.")
        .supportedFamilies([.systemSmall, .systemMedium])
    }
}

import WidgetKit
import SwiftUI

// Entry yang merepresentasikan state widget pada momen tertentu
struct TaskEntry: TimelineEntry {
    let date: Date
    let tasks: [Task]

    // State pemuatan untuk feedback visual
    var isLoading: Bool = false
}

// Model data yang dibagikan antara aplikasi dan widget
struct Task: Identifiable, Codable {
    let id: UUID
    var title: String
    var isCompleted: Bool
    var priority: Priority

    enum Priority: String, Codable {
        case low, medium, high
    }
}

struct TaskTimelineProvider: TimelineProvider {
    // Placeholder yang ditampilkan saat pemuatan awal
    func placeholder(in context: Context) -> TaskEntry {
        TaskEntry(
            date: Date(),
            tasks: [
                Task(id: UUID(), title: "Tugas contoh", isCompleted: false, priority: .medium)
            ]
        )
    }

    // Snapshot untuk galeri widget
    func getSnapshot(in context: Context, completion: @escaping (TaskEntry) -> Void) {
        let entry = TaskEntry(
            date: Date(),
            tasks: TaskDataManager.shared.fetchTasks().prefix(3).map { $0 }
        )
        completion(entry)
    }

    // Timeline lengkap dengan kebijakan refresh
    func getTimeline(in context: Context, completion: @escaping (Timeline<TaskEntry>) -> Void) {
        let tasks = TaskDataManager.shared.fetchTasks()
        let entry = TaskEntry(date: Date(), tasks: Array(tasks.prefix(3)))

        // Refresh dalam 15 menit atau setelah tindakan pengguna
        let nextUpdate = Calendar.current.date(
            byAdding: .minute,
            value: 15,
            to: Date()
        ) ?? Date()

        let timeline = Timeline(
            entries: [entry],
            policy: .after(nextUpdate)
        )
        completion(timeline)
    }
}

import Foundation

final class TaskDataManager {
    // Singleton untuk akses global
    static let shared = TaskDataManager()

    // Identifier App Group dikonfigurasi di Xcode
    private let appGroupID = "group.com.example.taskapp"

    // UserDefaults yang dibagikan antara aplikasi dan widget
    private var sharedDefaults: UserDefaults? {
        UserDefaults(suiteName: appGroupID)
    }

    private let tasksKey = "tasks"

    private init() {}

    // Mengambil tugas dari penyimpanan bersama
    func fetchTasks() -> [Task] {
        guard let data = sharedDefaults?.data(forKey: tasksKey),
              let tasks = try? JSONDecoder().decode([Task].self, from: data) else {
            return []
        }
        return tasks
    }

    // Menyimpan dengan notifikasi widget
    func saveTasks(_ tasks: [Task]) {
        guard let data = try? JSONEncoder().encode(tasks) else { return }
        sharedDefaults?.set(data, forKey: tasksKey)
    }

    // Memperbarui tugas tertentu
    func updateTask(_ task: Task) {
        var tasks = fetchTasks()
        if let index = tasks.firstIndex(where: { $0.id == task.id }) {
            tasks[index] = task
            saveTasks(tasks)
        }
    }

    // Mengubah status selesai
    func toggleTaskCompletion(taskID: UUID) {
        var tasks = fetchTasks()
        if let index = tasks.firstIndex(where: { $0.id == taskID }) {
            tasks[index].isCompleted.toggle()
            saveTasks(tasks)
        }
    }
}

import AppIntents
import WidgetKit

// Intent untuk mengubah status tugas
struct ToggleTaskIntent: AppIntent {
    // Judul yang ditampilkan di pintasan Siri
    static var title: LocalizedStringResource = "Ubah status tugas"

    // Deskripsi untuk aksesibilitas
    static var description = IntentDescription("Menandai tugas sebagai selesai atau belum selesai.")

    // Parameter: ID tugas yang akan diubah
    @Parameter(title: "ID tugas")
    var taskID: String

    // Initializer wajib untuk AppIntent
    init() {}

    // Initializer dengan parameter untuk pembuatan dari view
    init(taskID: UUID) {
        self.taskID = taskID.uuidString
    }

    // Eksekusi tindakan
    func perform() async throws -> some IntentResult {
        // Konversi string ID ke UUID
        guard let uuid = UUID(uuidString: taskID) else {
            return .result()
        }

        // Pembaruan tugas
        TaskDataManager.shared.toggleTaskCompletion(taskID: uuid)

        // Meminta refresh widget
        WidgetCenter.shared.reloadTimelines(ofKind: "TaskWidget")

        return .result()
    }
}

import SwiftUI
import WidgetKit

struct TaskWidgetView: View {
    let entry: TaskEntry

    // Adaptasi terhadap ukuran widget
    @Environment(\.widgetFamily) var family

    var body: some View {
        VStack(alignment: .leading, spacing: 8) {
            // Header dengan judul dan penghitung
            headerView

            // Daftar tugas dengan tombol interaktif
            ForEach(entry.tasks.prefix(tasksLimit)) { task in
                TaskRowView(task: task)
            }

            Spacer(minLength: 0)
        }
        .padding()
    }

    // Jumlah tugas berdasarkan ukuran
    private var tasksLimit: Int {
        switch family {
        case .systemSmall: return 2
        case .systemMedium: return 3
        default: return 4
        }
    }

    private var headerView: some View {
        HStack {
            Text("Tugas")
                .font(.headline)
                .fontWeight(.bold)

            Spacer()

            // Badge dengan jumlah tugas yang tersisa
            let remaining = entry.tasks.filter { !$0.isCompleted }.count
            Text("\(remaining)")
                .font(.caption.bold())
                .foregroundStyle(.white)
                .padding(.horizontal, 8)
                .padding(.vertical, 4)
                .background(remaining > 0 ? Color.orange : Color.green)
                .clipShape(Capsule())
        }
    }
}

struct TaskRowView: View {
    let task: Task

    var body: some View {
        // Tombol dengan App Intent sebagai tindakan
        Button(intent: ToggleTaskIntent(taskID: task.id)) {
            HStack(spacing: 12) {
                // Indikator selesai
                Image(systemName: task.isCompleted ? "checkmark.circle.fill" : "circle")
                    .font(.title3)
                    .foregroundStyle(task.isCompleted ? .green : .secondary)

                // Judul tugas
                Text(task.title)
                    .font(.subheadline)
                    .strikethrough(task.isCompleted)
                    .foregroundStyle(task.isCompleted ? .secondary : .primary)
                    .lineLimit(1)

                Spacer()

                // Indikator prioritas
                priorityIndicator
            }
            .padding(.vertical, 6)
            .padding(.horizontal, 10)
            .background(Color(.systemBackground).opacity(0.5))
            .cornerRadius(8)
        }
        .buttonStyle(.plain)
    }

    @ViewBuilder
    private var priorityIndicator: some View {
        switch task.priority {
        case .high:
            Image(systemName: "exclamationmark.circle.fill")
                .foregroundStyle(.red)
        case .medium:
            Image(systemName: "minus.circle.fill")
                .foregroundStyle(.orange)
        case .low:
            EmptyView()
        }
    }
}

import SwiftUI
import AppIntents

// Intent khusus untuk Toggle dengan state eksplisit
struct SetTaskCompletionIntent: AppIntent {
    static var title: LocalizedStringResource = "Tetapkan status tugas"

    @Parameter(title: "ID tugas")
    var taskID: String

    // State target: true = selesai, false = belum selesai
    @Parameter(title: "Selesai")
    var isCompleted: Bool

    init() {}

    init(taskID: UUID, isCompleted: Bool) {
        self.taskID = taskID.uuidString
        self.isCompleted = isCompleted
    }

    func perform() async throws -> some IntentResult {
        guard let uuid = UUID(uuidString: taskID) else {
            return .result()
        }

        var tasks = TaskDataManager.shared.fetchTasks()
        if let index = tasks.firstIndex(where: { $0.id == uuid }) {
            // Menetapkan state secara eksplisit (bukan toggle)
            tasks[index].isCompleted = isCompleted
            TaskDataManager.shared.saveTasks(tasks)
        }

        WidgetCenter.shared.reloadTimelines(ofKind: "TaskWidget")
        return .result()
    }
}

struct TaskToggleRowView: View {
    let task: Task

    var body: some View {
        HStack {
            Text(task.title)
                .font(.subheadline)
                .strikethrough(task.isCompleted)

            Spacer()

            // Toggle interaktif dengan intent
            Toggle(
                isOn: task.isCompleted,
                intent: SetTaskCompletionIntent(
                    taskID: task.id,
                    isCompleted: !task.isCompleted
                )
            )
            .toggleStyle(.switch)
            .labelsHidden()
        }
        .padding(.vertical, 4)
    }
}

import SwiftUI
import WidgetKit

struct AnimatedTaskRowView: View {
    let task: Task

    var body: some View {
        Button(intent: ToggleTaskIntent(taskID: task.id)) {
            HStack(spacing: 12) {
                // Ikon dengan animasi transisi
                Image(systemName: task.isCompleted ? "checkmark.circle.fill" : "circle")
                    .font(.title3)
                    .foregroundStyle(task.isCompleted ? .green : .secondary)
                    // Animasi ikon saat berubah
                    .contentTransition(.symbolEffect(.replace))

                Text(task.title)
                    .font(.subheadline)
                    .strikethrough(task.isCompleted)
                    .foregroundStyle(task.isCompleted ? .secondary : .primary)
                    // Animasi teks
                    .contentTransition(.opacity)

                Spacer()
            }
            .padding(.vertical, 6)
            .padding(.horizontal, 10)
            .background(
                RoundedRectangle(cornerRadius: 8)
                    .fill(task.isCompleted ? Color.green.opacity(0.1) : Color.clear)
            )
            // Animasi background
            .animation(.easeInOut(duration: 0.3), value: task.isCompleted)
        }
        .buttonStyle(.plain)
    }
}

// Widget dengan invalidasi animasi
struct AnimatedTaskWidget: Widget {
    let kind: String = "AnimatedTaskWidget"

    var body: some WidgetConfiguration {
        StaticConfiguration(
            kind: kind,
            provider: TaskTimelineProvider()
        ) { entry in
            AnimatedTaskWidgetView(entry: entry)
                .containerBackground(.fill.tertiary, for: .widget)
        }
        .configurationDisplayName("Tugas Beranimasi")
        .description("Widget dengan animasi halus.")
        .supportedFamilies([.systemSmall, .systemMedium, .systemLarge])
        // Aktivasi animasi konten
        .contentMarginsDisabled()
    }
}

struct AnimatedTaskWidgetView: View {
    let entry: TaskEntry

    var body: some View {
        VStack(alignment: .leading, spacing: 8) {
            headerView

            ForEach(entry.tasks) { task in
                AnimatedTaskRowView(task: task)
            }

            Spacer(minLength: 0)
        }
        .padding()
    }

    private var headerView: some View {
        HStack {
            Text("Tugas")
                .font(.headline.bold())

            Spacer()

            let completed = entry.tasks.filter(\.isCompleted).count
            let total = entry.tasks.count

            // Progres beranimasi
            Text("\(completed)/\(total)")
                .font(.caption.bold())
                .foregroundStyle(.secondary)
                .contentTransition(.numericText())
        }
    }
}

import WidgetKit
import SwiftUI
import AppIntents

// Konfigurasi yang diekspos kepada pengguna
struct TaskWidgetConfigurationIntent: WidgetConfigurationIntent {
    static var title: LocalizedStringResource = "Konfigurasi tugas"
    static var description = IntentDescription("Sesuaikan tampilan tugas.")

    // Filter berdasarkan prioritas
    @Parameter(title: "Prioritas", default: .all)
    var priorityFilter: PriorityFilter

    // Tampilkan tugas selesai
    @Parameter(title: "Tampilkan selesai", default: true)
    var showCompleted: Bool

    // Jumlah maksimum tugas
    @Parameter(title: "Jumlah tugas", default: 3)
    var maxTasks: Int
}

// Enum untuk filter prioritas
enum PriorityFilter: String, AppEnum {
    case all
    case high
    case medium
    case low

    static var typeDisplayRepresentation: TypeDisplayRepresentation = "Prioritas"

    static var caseDisplayRepresentations: [PriorityFilter: DisplayRepresentation] = [
        .all: "Semua",
        .high: "Tinggi",
        .medium: "Sedang",
        .low: "Rendah"
    ]
}

// Provider yang disesuaikan dengan konfigurasi
struct ConfigurableTaskProvider: AppIntentTimelineProvider {
    typealias Entry = TaskEntry
    typealias Intent = TaskWidgetConfigurationIntent

    func placeholder(in context: Context) -> TaskEntry {
        TaskEntry(date: Date(), tasks: [])
    }

    func snapshot(for configuration: TaskWidgetConfigurationIntent, in context: Context) async -> TaskEntry {
        let tasks = filteredTasks(for: configuration)
        return TaskEntry(date: Date(), tasks: tasks)
    }

    func timeline(for configuration: TaskWidgetConfigurationIntent, in context: Context) async -> Timeline<TaskEntry> {
        let tasks = filteredTasks(for: configuration)
        let entry = TaskEntry(date: Date(), tasks: tasks)

        let nextUpdate = Date().addingTimeInterval(15 * 60)
        return Timeline(entries: [entry], policy: .after(nextUpdate))
    }

    // Menerapkan filter konfigurasi
    private func filteredTasks(for config: TaskWidgetConfigurationIntent) -> [Task] {
        var tasks = TaskDataManager.shared.fetchTasks()

        // Filter berdasarkan prioritas
        if config.priorityFilter != .all {
            let priority = Task.Priority(rawValue: config.priorityFilter.rawValue) ?? .medium
            tasks = tasks.filter { $0.priority == priority }
        }

        // Filter selesai jika perlu
        if !config.showCompleted {
            tasks = tasks.filter { !$0.isCompleted }
        }

        // Batasi jumlah
        return Array(tasks.prefix(config.maxTasks))
    }
}

// Widget dengan konfigurasi pengguna
struct ConfigurableTaskWidget: Widget {
    let kind: String = "ConfigurableTaskWidget"

    var body: some WidgetConfiguration {
        // AppIntentConfiguration untuk widget yang dapat dikonfigurasi
        AppIntentConfiguration(
            kind: kind,
            intent: TaskWidgetConfigurationIntent.self,
            provider: ConfigurableTaskProvider()
        ) { entry in
            TaskWidgetView(entry: entry)
                .containerBackground(.fill.tertiary, for: .widget)
        }
        .configurationDisplayName("Tugas Disesuaikan")
        .description("Filter dan sesuaikan tugas Anda.")
        .supportedFamilies([.systemSmall, .systemMedium, .systemLarge])
    }
}

import AppIntents
import WidgetKit

struct ToggleTaskWithFeedbackIntent: AppIntent {
    static var title: LocalizedStringResource = "Ubah tugas dengan feedback"

    @Parameter(title: "ID tugas")
    var taskID: String

    init() {}

    init(taskID: UUID) {
        self.taskID = taskID.uuidString
    }

    func perform() async throws -> some IntentResult & ReturnsValue<Bool> {
        guard let uuid = UUID(uuidString: taskID) else {
            // Mengembalikan kegagalan diam
            return .result(value: false)
        }

        // Mensimulasikan operasi async (misalnya sinkronisasi server)
        do {
            try await Task.sleep(for: .milliseconds(100))

            TaskDataManager.shared.toggleTaskCompletion(taskID: uuid)
            WidgetCenter.shared.reloadTimelines(ofKind: "TaskWidget")

            return .result(value: true)
        } catch {
            // Error: jangan perbarui widget
            return .result(value: false)
        }
    }
}

// View dengan state pemuatan
struct TaskRowWithLoadingView: View {
    let task: Task
    @State private var isLoading = false

    var body: some View {
        Button(intent: ToggleTaskIntent(taskID: task.id)) {
            HStack(spacing: 12) {
                // Indikator kondisional
                Group {
                    if isLoading {
                        ProgressView()
                            .scaleEffect(0.8)
                    } else {
                        Image(systemName: task.isCompleted ? "checkmark.circle.fill" : "circle")
                            .foregroundStyle(task.isCompleted ? .green : .secondary)
                    }
                }
                .frame(width: 24, height: 24)

                Text(task.title)
                    .font(.subheadline)
                    .strikethrough(task.isCompleted)

                Spacer()
            }
            .padding(.vertical, 6)
            .padding(.horizontal, 10)
            .background(Color(.systemBackground).opacity(0.5))
            .cornerRadius(8)
        }
        .buttonStyle(.plain)
        .disabled(isLoading)
        .opacity(isLoading ? 0.6 : 1.0)
    }
}

import WidgetKit
import SwiftUI

// 1. Selalu invalidasi cache setelah modifikasi
final class WidgetRefreshManager {
    static func refreshAllWidgets() {
        // Refresh semua widget aplikasi
        WidgetCenter.shared.reloadAllTimelines()
    }

    static func refreshWidget(kind: String) {
        // Refresh widget tertentu
        WidgetCenter.shared.reloadTimelines(ofKind: kind)
    }

    // Panggilan dari aplikasi setelah modifikasi data
    static func notifyDataChanged() {
        Task { @MainActor in
            refreshAllWidgets()
        }
    }
}

// 2. Batasi kompleksitas view
struct OptimizedWidgetView: View {
    let entry: TaskEntry

    var body: some View {
        // Lebih sukai view sederhana tanpa GeometryReader
        VStack(alignment: .leading, spacing: 8) {
            ForEach(entry.tasks.prefix(3)) { task in
                // Komponen ringan
                minimalTaskRow(task)
            }
        }
        .padding()
    }

    // View minimal untuk performa
    @ViewBuilder
    private func minimalTaskRow(_ task: Task) -> some View {
        Button(intent: ToggleTaskIntent(taskID: task.id)) {
            HStack {
                Image(systemName: task.isCompleted ? "checkmark.circle.fill" : "circle")
                Text(task.title)
                    .lineLimit(1)
            }
        }
        .buttonStyle(.plain)
    }
}

// 3. Gunakan @AppStorage untuk state sederhana
struct QuickSettingsWidgetView: View {
    // Akses langsung ke UserDefaults bersama
    @AppStorage("showCompletedTasks", store: UserDefaults(suiteName: "group.com.example.app"))
    private var showCompleted = true

    var body: some View {
        // State bertahan antar refresh
        Text(showCompleted ? "Menampilkan semua" : "Menyembunyikan selesai")
    }
}

// 4. Pra-hitung data dalam provider
struct OptimizedTaskEntry: TimelineEntry {
    let date: Date
    let tasks: [Task]

    // Data yang sudah dipra-hitung
    let completedCount: Int
    let pendingCount: Int
    let highPriorityCount: Int

    init(date: Date, tasks: [Task]) {
        self.date = date
        self.tasks = tasks

        // Perhitungan dilakukan sekali
        self.completedCount = tasks.filter(\.isCompleted).count
        self.pendingCount = tasks.filter { !$0.isCompleted }.count
        self.highPriorityCount = tasks.filter { $0.priority == .high && !$0.isCompleted }.count
    }
}