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import SwiftUI
enum FocusedField: Int, Hashable {
case chatInput
}
struct ChatView: View {
@Environment(Hotline.self) private var model: Hotline
@Environment(\.colorScheme) var colorScheme
@Environment(\.dismiss) var dismiss
@State var input: String = ""
@State private var scrollPos: Int?
@State private var contentHeight: CGFloat = 0
@FocusState private var focusedField: FocusedField?
@Namespace var bottomID
@State private var showingExporter: Bool = false
@State private var chatDocument: TextFile = TextFile()
var body: some View {
NavigationStack {
ScrollViewReader { reader in
VStack(alignment: .leading, spacing: 0) {
// MARK: Scroll View
GeometryReader { gm in
ScrollView(.vertical) {
LazyVStack(alignment: .leading) {
ForEach(model.chat) { msg in
// MARK: Agreement
if msg.type == .agreement {
VStack(alignment: .center, spacing: 16) {
if let bannerImage = self.model.bannerImage {
#if os(macOS)
Image(nsImage: bannerImage)
.resizable()
.scaledToFit()
.frame(maxWidth: 468.0)
.clipShape(RoundedRectangle(cornerRadius: 3))
#elseif os(iOS)
Image(uiImage: bannerImage)
.resizable()
.scaledToFit()
.frame(maxWidth: 468.0)
.clipShape(RoundedRectangle(cornerRadius: 3))
#endif
}
VStack(spacing: 0) {
ScrollView(.vertical) {
HStack {
Text(msg.text)
.font(.system(size: 12))
.fontDesign(.monospaced)
.textSelection(.enabled)
Spacer()
}
.padding(16)
}
.scrollBounceBehavior(.basedOnSize)
.frame(maxHeight: 375)
}
.background(Color(white: colorScheme == .light ? 0.0 : 1.0).opacity(0.05))
.frame(maxWidth: 468.0)
.clipShape(RoundedRectangle(cornerRadius: 3))
}
.frame(maxWidth: .infinity)
.padding()
}
// MARK: Status
else if msg.type == .status {
HStack {
Spacer()
Text(msg.text)
.lineLimit(1)
.truncationMode(.middle)
.textSelection(.disabled)
.opacity(0.3)
Spacer()
}
.padding()
}
else {
HStack(alignment: .firstTextBaseline) {
if let username = msg.username {
Text("**\(username):** \(msg.text)")
.lineSpacing(4)
.multilineTextAlignment(.leading)
.textSelection(.enabled)
}
else {
Text(msg.text)
.lineSpacing(4)
.multilineTextAlignment(.leading)
.textSelection(.enabled)
}
Spacer()
}
.padding(EdgeInsets(top: 4, leading: 16, bottom: 4, trailing: 16))
}
}
EmptyView().id(bottomID)
}
// .padding(.bottom, 12)
}
// .padding(.bottom, 60)
.frame(maxWidth: .infinity, maxHeight: .infinity)
.defaultScrollAnchor(.bottom)
.onChange(of: model.chat.count) {
// withAnimation {
reader.scrollTo(bottomID, anchor: .bottom)
// }
}
.onAppear {
reader.scrollTo(bottomID, anchor: .bottom)
// focusedField = .chatInput
}
.onChange(of: gm.size) {
reader.scrollTo(bottomID, anchor: .bottom)
}
}
}
// MARK: Input Divider
Divider()
.padding([.top, .bottom], 0)
// MARK: Input Bar
HStack(alignment: .lastTextBaseline, spacing: 0) {
TextField("", text: $input, axis: .vertical)
.focused($focusedField, equals: .chatInput)
.textFieldStyle(.plain)
.lineLimit(1...5)
.multilineTextAlignment(.leading)
// .frame(maxWidth: .infinity)
.onSubmit {
if !self.input.isEmpty {
model.sendChat(self.input)
}
self.input = ""
}
.frame(maxWidth: .infinity)
.padding()
}
.frame(maxWidth: .infinity, minHeight: 28)
.padding(EdgeInsets(top: 0, leading: 16, bottom: 8, trailing: 16))
.overlay(alignment: .leadingLastTextBaseline) {
Image(systemName: "chevron.right").opacity(0.4).offset(x: 16)
}
.onContinuousHover { phase in
switch phase {
case .active(_):
NSCursor.iBeam.set()
case .ended:
NSCursor.arrow.set()
break
}
}
.onTapGesture {
focusedField = .chatInput
}
}
}
.background(Color(nsColor: .textBackgroundColor))
.toolbar {
ToolbarItem(placement: .primaryAction) {
Button {
if prepareChatDocument() {
showingExporter = true
}
} label: {
Image(systemName: "square.and.arrow.up")
}.help("Save Chat...")
}
}
.fileExporter(isPresented: $showingExporter, document: self.chatDocument, contentType: .utf8PlainText, defaultFilename: "\(self.model.serverTitle) Chat.txt") { result in
switch result {
case .success(let url):
print("Saved to \(url)")
case .failure(let error):
print(error.localizedDescription)
}
self.chatDocument.text = ""
}
}
private func prepareChatDocument() -> Bool {
var text: String = String()
self.chatDocument.text = ""
for msg in model.chat {
if msg.type == .agreement {
text.append(msg.text)
text.append("\n\n")
}
else if msg.type == .message {
if let username = msg.username {
text.append("\(username): \(msg.text)")
}
else {
text.append(msg.text)
}
text.append("\n")
}
else if msg.type == .status {
text.append(msg.text)
text.append("\n")
}
}
if text.isEmpty {
return false
}
self.chatDocument.text = text
return true
}
}
#Preview {
ChatView()
.environment(Hotline(trackerClient: HotlineTrackerClient(), client: HotlineClient()))
}
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