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102 lines
3.1 KiB
Swift
102 lines
3.1 KiB
Swift
//
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// Copyright 2021 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import SwiftUI
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/// Used for mocking top level screens and their various states.
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@available(iOS 14.0, *)
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protocol MockScreenState {
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static var screenStates: [MockScreenState] { get }
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var screenType: Any.Type { get }
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var screenView: AnyView { get }
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var stateTitle: String { get }
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}
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@available(iOS 14.0, *)
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extension MockScreenState {
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/// Get a list of the screens for every screen state.
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static var screensViews: [AnyView] {
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screenStates.map(\.screenView)
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}
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/// A unique key to identify each screen state.
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static var screenStateKeys: [String] {
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return screenStates.enumerated().map { (index, state) in
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state.screenName + String(index)
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}
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}
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/// Render each of the screen states in a group applying
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/// any optional environment variables.
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/// - Parameters:
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/// - themeId: id of theme to render the screens with.
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/// - locale: Locale to render the screens with.
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/// - sizeCategory: type sizeCategory to render the screens with.
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/// - addNavigation: Wether to wrap the screens in a navigation view.
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/// - Returns: The group of screens
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static func screenGroup(
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themeId: ThemeIdentifier = .light,
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locale: Locale = Locale.current,
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sizeCategory: ContentSizeCategory = ContentSizeCategory.medium,
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addNavigation: Bool = false
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) -> some View {
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Group {
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ForEach(0..<screensViews.count) { i in
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wrapWithNavigation(addNavigation, view: screensViews[i])
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.previewDisplayName(screenStates[i].stateTitle)
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}
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}
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.theme(themeId)
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.environment(\.locale, locale)
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.environment(\.sizeCategory, sizeCategory)
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}
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@ViewBuilder
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static func wrapWithNavigation<V: View>(_ wrap: Bool, view: V) -> some View {
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if wrap {
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NavigationView{
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view
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}
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} else {
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view
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}
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}
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/// A title to represent the screen and it's screen state
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var screenName: String {
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"\(String(describing: screenType.self))"
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}
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/// A title to represent this screen state
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var stateTitle: String {
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String(describing: self)
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}
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/// A title to represent the screen and it's screen state
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var fullScreenTitle: String {
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"\(screenName): \(stateTitle)"
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}
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}
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@available(iOS 14.0, *)
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extension MockScreenState where Self: CaseIterable {
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static var screenStates: [MockScreenState] {
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return Array(self.allCases)
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}
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}
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