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mastodon-app-ufficiale-ipho.../MastodonSDK/Sources/MastodonUI/View/Content/PollOptionView+ViewModel.swift

235 lines
8.6 KiB
Swift

//
// PollOptionView+ViewModel.swift
//
//
// Created by MainasuK on 2021-12-8.
//
import UIKit
import Combine
import CoreData
import MetaTextKit
import MastodonAsset
import MastodonCore
extension PollOptionView {
static let percentageFormatter: NumberFormatter = {
let formatter = NumberFormatter()
formatter.numberStyle = .percent
formatter.maximumFractionDigits = 1
formatter.minimumIntegerDigits = 1
formatter.roundingMode = .down
return formatter
}()
public final class ViewModel: ObservableObject {
var disposeBag = Set<AnyCancellable>()
var observations = Set<NSKeyValueObservation>()
public var objects = Set<NSManagedObject>()
let layoutDidUpdate = PassthroughSubject<Void, Never>()
@Published public var authContext: AuthContext?
@Published public var style: PollOptionView.Style?
@Published public var content: String = "" // for edit style
@Published public var metaContent: MetaContent? // for plain style
@Published public var percentage: Double?
@Published public var isExpire: Bool = false
@Published public var isMultiple: Bool = false
@Published public var isSelect: Bool? = false // nil for server not return selection array
@Published public var isPollVoted: Bool = false
@Published public var isMyPoll: Bool = false
@Published public var isReveal: Bool = false
@Published public var selectState: SelectState = .none
@Published public var voteState: VoteState = .hidden
@Published public var roundedBackgroundViewColor: UIColor = .clear
@Published public var primaryStripProgressViewTintColor: UIColor = Asset.Colors.brand.color.withAlphaComponent(0.8)
@Published public var secondaryStripProgressViewTintColor: UIColor = Asset.Colors.brand.color.withAlphaComponent(0.5)
@Published public var groupedAccessibilityLabel = ""
init() {
// selectState
Publishers.CombineLatest3(
$isSelect,
$isExpire,
$isPollVoted
)
.map { isSelect, isExpire, isPollVoted -> SelectState in
if isSelect == true {
return .on
} else if isExpire {
return .none
} else if isPollVoted, isSelect == nil {
return .none
} else {
return .off
}
}
.assign(to: &$selectState)
// voteState
Publishers.CombineLatest3(
$isReveal,
$isSelect,
$percentage
)
.map { isReveal, isSelect, percentage -> VoteState in
guard isReveal else {
return .hidden
}
let oldPercentage = self.percentage
let animated = oldPercentage != nil && percentage != nil
return .reveal(voted: isSelect == true, percentage: percentage ?? 0, animating: animated)
}
.assign(to: &$voteState)
// isReveal
Publishers.CombineLatest3(
$isExpire,
$isPollVoted,
$isMyPoll
)
.map { isExpire, isPollVoted, isMyPoll in
return isExpire || isPollVoted || isMyPoll
}
.assign(to: &$isReveal)
}
public enum Corner: Hashable {
case none
case circle
case radius(CGFloat)
}
public enum SelectState: Equatable, Hashable {
case none
case off
case on
}
public enum VoteState: Equatable, Hashable {
case hidden
case reveal(voted: Bool, percentage: Double, animating: Bool)
}
}
}
extension PollOptionView.ViewModel {
public func bind(view: PollOptionView) {
// backgroundColor
$roundedBackgroundViewColor
.map { $0 as UIColor? }
.assign(to: \.backgroundColor, on: view.roundedBackgroundView)
.store(in: &disposeBag)
// content
NotificationCenter.default
.publisher(for: UITextField.textDidChangeNotification, object: view.optionTextField)
.receive(on: DispatchQueue.main)
.map { _ in view.optionTextField.text?.trimmingCharacters(in: .whitespacesAndNewlines) ?? "" }
.assign(to: &$content)
// metaContent
$metaContent
.sink { metaContent in
guard let metaContent = metaContent else {
view.optionTextField.text = ""
view.optionTextField.accessibilityLabel = ""
return
}
view.optionTextField.text = metaContent.string
view.optionTextField.accessibilityLabel = metaContent.string
}
.store(in: &disposeBag)
// selectState
$selectState
.sink { selectState in
switch selectState {
case .none:
view.checkmarkBackgroundView.isHidden = true
view.checkmarkImageView.isHidden = true
case .off:
view.checkmarkBackgroundView.isHidden = false
view.checkmarkImageView.isHidden = true
case .on:
view.checkmarkBackgroundView.isHidden = false
view.checkmarkImageView.isHidden = false
}
}
.store(in: &disposeBag)
// voteState
$voteState
.sink { [weak self] voteState in
guard let self = self else { return }
switch voteState {
case .hidden:
view.optionPercentageLabel.isHidden = true
view.voteProgressStripView.isHidden = true
view.voteProgressStripView.setProgress(0.0, animated: false)
case .reveal(let voted, let percentage, let animating):
view.optionPercentageLabel.isHidden = false
view.optionPercentageLabel.text = String(Int(100 * percentage)) + "%"
view.voteProgressStripView.isHidden = false
view.voteProgressStripView.tintColor = voted ? self.primaryStripProgressViewTintColor : self.secondaryStripProgressViewTintColor
view.voteProgressStripView.setProgress(CGFloat(percentage), animated: animating)
}
}
.store(in: &disposeBag)
Publishers.CombineLatest(
$voteState,
layoutDidUpdate
)
.sink { voteState, _ in
guard case .plain = view.style else { return }
view.layoutIfNeeded()
switch voteState {
case .hidden:
view.optionTextField.textColor = Asset.Colors.Label.primary.color
view.optionTextField.layer.removeShadow()
case .reveal(_, let percentage, _):
if CGFloat(percentage) * view.roundedBackgroundView.frame.width > view.optionLabelMiddlePaddingView.frame.minX {
view.optionTextField.textColor = .white
view.optionTextField.layer.setupShadow(x: 0, y: 0, blur: 4, spread: 0)
} else {
view.optionTextField.textColor = Asset.Colors.Label.primary.color
view.optionTextField.layer.removeShadow()
}
if CGFloat(percentage) * view.roundedBackgroundView.frame.width > view.optionLabelMiddlePaddingView.frame.maxX {
view.optionPercentageLabel.textColor = .white
view.optionPercentageLabel.layer.setupShadow(x: 0, y: 0, blur: 4, spread: 0)
} else {
view.optionPercentageLabel.textColor = Asset.Colors.Label.primary.color
view.optionPercentageLabel.layer.removeShadow()
}
}
}
.store(in: &disposeBag)
bindAccessibility(view: view)
}
private func bindAccessibility(view: PollOptionView) {
$selectState
.sink { selectState in
switch selectState {
case .on:
view.accessibilityTraits.insert(.selected)
default:
view.accessibilityTraits.remove(.selected)
}
}
.store(in: &disposeBag)
}
}