Observing.swift

import Foundation
import Combine
import ProoficsSDK
import SwiftUI


class BundleViewModel: ObservableObject
{
	@Published var title: String = ""
	@Published var subtitle: String?
	@Published var status: BundleStatus = .New
	
	let url: URL?
	
	let bundle: ProoficsSDK.Bundle
	
	var cancellables = [AnyCancellable]()
	
	init(bundle: ProoficsSDK.Bundle)
	{
		self.bundle = bundle
		self.status = bundle.status
		self.url = bundle.thumbnail?.url

		cancellables.append(bundle.publisher(for: \.statusString).sink { newValue in
			self.status = BundleStatus(rawValue: newValue)!
		})
		bundle.publisher(for: \.displayTitle).assign(to: &$title)
		bundle.publisher(for: \.jobName).assign(to: &$subtitle)
	}
}

extension BundleViewModel: Identifiable
{
	var id: String
	{
		return bundle.objectID!
	}
}

extension ProoficsSDK.Bundle
{
	@objc var displayTitle: String
	{
		var string = ""
		
		if let number = jobNumber
		{
			string += number
		}
		
		if let batch = batchNumber, !batch.isEmpty
		{
			string += " / Batch: " + batch
		}
		
		return string
	}
	
	@objc dynamic var statusString: String
	{
		get {
			return status.rawValue
		}
		
		set {
			status = BundleStatus(rawValue: newValue)!
		}
	}
}

open class Bundle: Entity
{
	open var status: BundleStatus = BundleStatus.New
	{
		willSet
		{
			willChangeValue(forKey: "statusString")
		}
		
		didSet {
			didChangeValue(forKey: "statusString")
		}
	}
}