58 lines
1.4 KiB
Swift
58 lines
1.4 KiB
Swift
//
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// Handlerable.swift
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// VDS
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//
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// Created by Matt Bruce on 7/22/22.
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//
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import Foundation
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import Combine
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import UIKit
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public enum HandlerableUpdateStrategy {
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case immediate
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case delayed
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case alwaysImmediate
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}
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public protocol Handlerable: AnyObject, Initable, Disabling, Surfaceable {
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var subject: PassthroughSubject<Void, Never> { get set }
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var subscribers: Set<AnyCancellable> { get set }
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var updateStrategy: HandlerableUpdateStrategy { get set }
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func updateView()
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}
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extension Handlerable {
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public func setupNeedsUpdateEvent() {
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subject
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.debounce(for: .seconds(0), scheduler: RunLoop.main)
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.sink { [weak self] _ in
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self?.updateView()
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}.store(in: &subscribers)
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}
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public func setNeedsUpdate() {
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switch updateStrategy {
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case .delayed:
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subject.send()
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case .immediate, .alwaysImmediate:
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updateView()
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}
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}
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public func updateIfNeeded<T: Equatable>(_ oldValue: T, _ newValue: T) {
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if oldValue != newValue {
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setNeedsUpdate()
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}
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}
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}
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extension Handlerable where Self: UIControl {
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public func addEvent(event: UIControl.Event, block: @escaping (Self)->()) {
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publisher(for: event)
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.sink(receiveValue: { c in
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block(c)
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}).store(in: &subscribers)
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}
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}
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