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136 lines
4.5 KiB
Swift
136 lines
4.5 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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import Combine
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@available(iOS 14.0, *)
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struct TemplateRoomChat: View {
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// MARK: - Properties
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// MARK: Private
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@Environment(\.theme) private var theme: ThemeSwiftUI
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// MARK: Public
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@ObservedObject var viewModel: TemplateRoomChatViewModel.Context
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var presentedModally = false
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var body: some View {
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VStack {
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VStack{
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roomContent
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}.frame(maxHeight: .infinity)
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HStack {
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TextField(VectorL10n.roomMessageShortPlaceholder, text: $viewModel.messageInput)
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.textFieldStyle(BorderedInputFieldStyle())
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if viewModel.viewState.sendButtonEnabled {
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Button(action: {
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viewModel.send(viewAction: .sendMessage)
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}, label: {
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Image(uiImage: Asset.Images.sendIcon.image)
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})
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}
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}
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// When displaying/hiding the send button slide it on/off from the right side
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.animation(.easeOut(duration: 0.25))
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.transition(.move(edge: .trailing))
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.padding()
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}
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.background(theme.colors.background)
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.navigationTitle(viewModel.viewState.roomName ?? "Chat")
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.toolbar {
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ToolbarItem(placement: .primaryAction) {
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trailingToolBarButton
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}
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}
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}
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@ViewBuilder
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private var roomContent: some View {
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if case .notInitialized = viewModel.viewState.roomInitializationStatus {
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ProgressView()
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.progressViewStyle(CircularProgressViewStyle(tint: theme.colors.primaryContent))
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.accessibility(identifier: "loadingProgress")
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} else if case .failedToInitialize = viewModel.viewState.roomInitializationStatus {
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Text("Sorry, We failed to load the room.")
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.foregroundColor(theme.colors.primaryContent)
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.accessibility(identifier: "errorMessage")
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} else if viewModel.viewState.bubbles.isEmpty {
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Text("There are no messages in this room yet.")
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.foregroundColor(theme.colors.primaryContent)
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.accessibility(identifier: "errorMessage")
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} else {
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bubbleList
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}
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}
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private var bubbleList: some View {
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ScrollViewReader { reader in
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ScrollView{
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LazyVStack {
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ForEach(viewModel.viewState.bubbles) { bubble in
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TemplateRoomChatBubbleView(bubble: bubble)
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.id(bubble.id)
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}
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}
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.onAppear{
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guard let lastBubbleId = viewModel.viewState.bubbles.last?.id
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else { return }
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reader.scrollTo(lastBubbleId, anchor: .bottom)
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}
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.onChange(of: itemCount) { _ in
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guard let lastBubbleId = viewModel.viewState.bubbles.last?.id
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else { return }
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reader.scrollTo(lastBubbleId, anchor: .bottom)
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}
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// When the scroll content takes less than the screen space align at the top
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.frame(maxHeight: .infinity, alignment: .top)
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}
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}
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}
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@ViewBuilder
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private var trailingToolBarButton: some View {
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if presentedModally {
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Button(VectorL10n.done) {
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viewModel.send(viewAction: .done)
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}
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}
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}
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private var itemCount: Int {
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return viewModel.viewState
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.bubbles
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.map(\.items)
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.map(\.count)
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.reduce(0, +)
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}
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}
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// MARK: - Previews
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@available(iOS 14.0, *)
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struct TemplateRoomChat_Previews: PreviewProvider {
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static let stateRenderer = MockTemplateRoomChatScreenState.stateRenderer
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static var previews: some View {
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stateRenderer.screenGroup(addNavigation: true)
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}
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}
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