137 lines
4.7 KiB
Swift
137 lines
4.7 KiB
Swift
//
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// RadioButtonGroup.swift
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// VDS
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//
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// Created by Matt Bruce on 8/8/22.
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//
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import Foundation
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import UIKit
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import Combine
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open class SelectorGroupBase<SelectorModelType, SelectorGroupType: SelectorGroupModel, SelectorHandlerType: SelectorBase<SelectorModelType>>: View<SelectorGroupType>, Changable where SelectorModelType == SelectorGroupType.SelectorModelType {
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public var selectorViews: [SelectorHandlerType] = []
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public var onChange: Blocks.ActionBlock?
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//--------------------------------------------------
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// MARK: - Private Properties
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//--------------------------------------------------
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private var mainStackView: UIStackView = {
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return UIStackView().with {
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$0.translatesAutoresizingMaskIntoConstraints = false
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$0.alignment = .top
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$0.axis = .vertical
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$0.spacing = 10
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}
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}()
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//--------------------------------------------------
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// MARK: - Overrides
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//--------------------------------------------------
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override public var disabled: Bool {
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didSet {
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updateSelectors()
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}
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}
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override public var surface: Surface {
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didSet {
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updateSelectors()
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}
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}
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private func updateSelectors(){
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let selectors = model.selectors.compactMap { existing in
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return existing.copyWith {
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$0.disabled = disabled
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$0.surface = surface
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}
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}
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model.selectors = selectors
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}
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open override func setup() {
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super.setup()
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isAccessibilityElement = true
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accessibilityTraits = .button
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addSubview(mainStackView)
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mainStackView.topAnchor.constraint(equalTo: topAnchor).isActive = true
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mainStackView.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
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mainStackView.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
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mainStackView.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
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}
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open override func shouldUpdateView(viewModel: SelectorGroupType) -> Bool {
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let update = viewModel.selectors.count != model.selectors.count
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|| viewModel.hasError != model.hasError
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|| viewModel.surface != model.surface
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|| viewModel.disabled != model.disabled
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return update
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}
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open override func updateView(viewModel: ModelType) {
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func findSelectorView(id: UUID) -> SelectorHandlerType? {
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return selectorViews.first(where: { existingSelectorView in
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return existingSelectorView.model.id == id
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})
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}
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for selectorModel in viewModel.selectors {
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//see if view is there for the model
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if let foundSelectorView = findSelectorView(id: selectorModel.id) {
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foundSelectorView.set(with: selectorModel)
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} else {
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//create view
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let newSelectorView = SelectorHandlerType(with: selectorModel)
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//add the selectedPublisher for the change
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newSelectorView.publisher(for: .valueChanged)
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.sink(receiveValue: { [weak self] control in
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guard self?.model.selectors.count ?? 0 > 0 else { return }
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self?.didSelect(selector: control.model)
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})
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.store(in: &subscribers)
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//add model update to the subscribers
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newSelectorView.handlerPublisher()
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.sink { [weak self] model in
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if let cached = self?.getCachedSelector(viewModel: model), newSelectorView.shouldUpdateView(viewModel: cached) {
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self?.replace(viewModel: model)
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}
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}
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.store(in: &subscribers)
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self.selectorViews.append(newSelectorView)
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mainStackView.addArrangedSubview(newSelectorView)
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}
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}
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}
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public func getCachedSelector(viewModel: SelectorModelType) -> SelectorModelType? {
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if let index = model.selectors.firstIndex(where: { element in
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return element.id == viewModel.id
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}) {
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return model.selectors[index]
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} else {
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return nil
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}
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}
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public func replace(viewModel: SelectorModelType){
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if let index = model.selectors.firstIndex(where: { element in
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return element.id == viewModel.id
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}) {
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model.selectors[index] = viewModel
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}
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}
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open func didSelect(selector: SelectorModelType) { }
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}
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