kordophone-i/Kordophone/Shared/ConversationView.swift

import SwiftUI
import KordophoneKit

struct ConversationView : View {
    var conversation: Conversation
    var messages: [Message]
    
    var body: some View {
        ScrollViewReader { proxy in
            ScrollView {
                LazyVStack {
                    ForEach(messages) { message in
                        if message.sentByMe {
                            Spacer()
                        }
                        MessageView(message: message)
                            .id(message)
                        if !message.sentByMe {
                            Spacer()
                        }
                    }
                }
            }
            .navigationTitle(conversation.effectiveDisplayName)
            .onChange(of: messages) { newValue in
                proxy.scrollTo(newValue.last, anchor: .bottom)
            }
        }
    }
}

struct ConversationViewWrapper : View {
    var conversation: Conversation
    @State private var messages = [Message]()
    @EnvironmentObject private var connection: Connection
    
    private func refresh() {
        messages.removeAll()
        Task {
            self.messages = await connection.messages(in: conversation) ?? .init()
        }
    }
    
    var body: some View {
        ConversationView(conversation: conversation, messages: messages)
            .onChange(of: conversation, perform: { newValue in
                refresh()
            })
            .onAppear {
                refresh()
            }
    }
}