agiokas

import Foundation

final class Datasource {
    func pets() -> [Pet] {
        [
            Pet(id: "1", name: "Max", ownerId: "1"),
            Pet(id: "2", name: "Azor", ownerId: "1"),
            Pet(id: "3", name: "Monty", ownerId: "2"),
            Pet(id: "4", name: "Zizou", ownerId: "3"),
        ]

agiokas

public func addInt(_ a: Int, _ b: Int) throws -> Int {
    let result = a.addingReportingOverflow(b)
    if result.overflow {
        throw AddError.overflow
    }
    return result.partialValue
}

enum AddError: Error {
    case overflow

agiokas

import SwiftUI

struct ContentView: View {
    @ObservedObject var viewModel: ContentVM

    var body: some View {
        NavigationView {
            List(viewModel.values, id: \.self) { value in
                Text(value)
            }.navigationBarTitle("Our Cells")

agiokas

//
//  Created by Apostolos Giokas on 23.03.21.
//

final class MyViewControllerFactory: ViewCοntrollerFactory {
    override init() {
        super.init()
        register(vm: Data1.self) { UIViewController1(data: $0) }
        register(vm: Data2.self) { UIViewController2(data: $0) }
    }

agiokas

//
//  Created by Apostolos Giokas on 23.03.21.
//

import UIKit

class ViewController: UIViewController, IViewControllerNavigator {

    let button1 = UIButton(frame: CGRect(x: 50, y: 100, width: 200, height: 45))
    let button2 = UIButton(frame: CGRect(x: 50, y: 200, width: 200, height: 45))

agiokas

protocol IViewControllerNavigator: UIViewController {
    func navigate(data: Any, factory: ViewCοntrollerFactory)
}

extension IViewControllerNavigator {
    func navigate(data: Any, factory: ViewCοntrollerFactory = MyViewControllerFactory()) {
        guard let vmToPush = factory.create(for: data) else {
            return
        }
        present(vmToPush, animated: true, completion: nil)

agiokas

//
//  Created by Apostolos Giokas on 23.03.21.
//

import UIKit

open class ViewCοntrollerFactory: Factory<UIViewController> {
    public func register<T, OutP>(vm: T.Type, factory: @escaping (T) -> OutP) where OutP: UIViewController {
        register(for: vm, factory: { factory($0) })
    }

agiokas

//
//  Created by Apostolos Giokas on 10.03.21.
//

import Foundation

private protocol ICreator {
    var identifier: ObjectIdentifier { get }
    func create(for: Any) -> Any?
}

agiokas

import Combine
import CoreData
import Foundation

class CDPublisher<Entity>: NSObject, NSFetchedResultsControllerDelegate, Publisher where Entity: NSManagedObject {
    typealias Output = [Entity]
    typealias Failure = Error
  
    private let request: NSFetchRequest<Entity>
    private let context: NSManagedObjectContext

agiokas

import CoreData
import Foundation
import os.log
import RxCocoa
import RxSwift

class CDObservable<T>: NSObject, ObservableType, NSFetchedResultsControllerDelegate where T: NSManagedObject {
    private var fetchedResultsController: NSFetchedResultsController<NSManagedObject>?
    private let context: NSManagedObjectContext
    private let fetchRequest: NSFetchRequest<T>