pageta-native/Sources/Core/WidgetSnapshot.swift

import Foundation

/// Snapshot-DTO für die Widget-Surfaces. Spiegelt das Server-Response-
/// Shape von `GET /api/v1/snapshot/widget` (siehe
/// `pageta/apps/api/src/routes/snapshot.ts`).
///
/// **Architektur**: App fetched + schreibt nach App-Group-UserDefaults,
/// Widget liest read-only. Widget redet NIE direkt mit dem Server —
/// hätte sonst JWT-Refresh-Komplexität in einer Extension mit 30s-Limit.
struct WidgetSnapshot: Codable, Sendable, Equatable {
	let feed: [WidgetFeedItem]
	let saved: SavedCounts
	let lastSyncAt: String

	struct SavedCounts: Codable, Sendable, Equatable {
		let unread: Int
		let reading: Int
		let finished: Int
		let archived: Int
	}
}

struct WidgetFeedItem: Codable, Sendable, Equatable, Identifiable {
	let id: String
	let title: String
	let siteName: String
	let topic: String
	let imageUrl: String?
	let publishedAt: String?
	let url: String
}

/// Read/Write-Wrapper über UserDefaults im App-Group. Identische
/// Pattern wie `PendingShareStore`.
struct WidgetSnapshotStore: @unchecked Sendable {
	// UserDefaults ist thread-safe (Apple Docs), aber nicht Sendable.
	private let defaults: UserDefaults
	private let key: String

	static let storageKey = "pageta.widgetSnapshot.v1"

	init(appGroup: String = "group.ev.mana.pageta", key: String = WidgetSnapshotStore.storageKey) {
		self.defaults = UserDefaults(suiteName: appGroup) ?? .standard
		self.key = key
	}

	func load() -> WidgetSnapshot? {
		guard let data = defaults.data(forKey: key) else { return nil }
		return try? JSONDecoder().decode(WidgetSnapshot.self, from: data)
	}

	func save(_ snapshot: WidgetSnapshot) throws {
		let data = try JSONEncoder().encode(snapshot)
		defaults.set(data, forKey: key)
	}

	func clear() {
		defaults.removeObject(forKey: key)
	}
}