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| 1 | +// |
| 2 | +// ChatView.swift |
| 3 | +// Chat |
| 4 | +// |
| 5 | +// Created by Abdulhakim Ajetunmobi on 31/08/2023. |
| 6 | +// |
| 7 | + |
| 8 | +import SwiftUI |
| 9 | +import VonageClientSDKChat |
| 10 | + |
| 11 | +struct ChatView: View { |
| 12 | + @StateObject var chatViewModel: ChatViewModel |
| 13 | + @State private var message: String = "" |
| 14 | + |
| 15 | + var body: some View { |
| 16 | + VStack { |
| 17 | + if chatViewModel.events.isEmpty { |
| 18 | + ProgressView() |
| 19 | + } else { |
| 20 | + VStack { |
| 21 | + List { |
| 22 | + ForEach(chatViewModel.events, id: \.id) { event in |
| 23 | + switch event.kind { |
| 24 | + case .memberJoined, .memberLeft: |
| 25 | + let displayText = chatViewModel.generateDisplayText(event) |
| 26 | + Text(displayText.body) |
| 27 | + .frame(maxWidth: .infinity, alignment: .center) |
| 28 | + case.messageText: |
| 29 | + let displayText = chatViewModel.generateDisplayText(event) |
| 30 | + Text(displayText.body) |
| 31 | + .frame(maxWidth: .infinity, alignment: displayText.isUser ? .trailing : .leading) |
| 32 | + default: |
| 33 | + EmptyView() |
| 34 | + } |
| 35 | + }.listRowSeparator(.hidden) |
| 36 | + }.listStyle(.plain) |
| 37 | + |
| 38 | + Spacer() |
| 39 | + |
| 40 | + HStack { |
| 41 | + TextField("Message", text: $message) |
| 42 | + Button("Send") { |
| 43 | + Task { |
| 44 | + await chatViewModel.sendMessage(message) |
| 45 | + self.message = "" |
| 46 | + } |
| 47 | + }.buttonStyle(.bordered) |
| 48 | + }.padding(8) |
| 49 | + } |
| 50 | + } |
| 51 | + }.onAppear { |
| 52 | + Task { |
| 53 | + await chatViewModel.getMemberIDIfNeeded() |
| 54 | + await chatViewModel.getConversationEvents() |
| 55 | + } |
| 56 | + } |
| 57 | + } |
| 58 | +} |
| 59 | + |
| 60 | +@MainActor |
| 61 | +final class ChatViewModel: NSObject, ObservableObject { |
| 62 | + private let conversationID = "CON-ID" |
| 63 | + |
| 64 | + private var client: VGChatClient |
| 65 | + private var memberID: String? |
| 66 | + |
| 67 | + @Published var events: [VGPersistentConversationEvent] = [] |
| 68 | + |
| 69 | + init(client: VGChatClient) { |
| 70 | + self.client = client |
| 71 | + super.init() |
| 72 | + client.delegate = self |
| 73 | + } |
| 74 | + |
| 75 | + func getMemberIDIfNeeded() async { |
| 76 | + guard memberID == nil else { return } |
| 77 | + await getMemberID() |
| 78 | + } |
| 79 | + |
| 80 | + private func getMemberID() async { |
| 81 | + let member = try? await client.getConversationMember(conversationID, memberId: "me") |
| 82 | + memberID = member?.id |
| 83 | + |
| 84 | + if memberID == nil { |
| 85 | + memberID = try? await client.joinConversation(conversationID) |
| 86 | + } |
| 87 | + } |
| 88 | + |
| 89 | + func getConversationEvents() async { |
| 90 | + let params = VGGetConversationEventsParameters(order: .asc, pageSize: 100) |
| 91 | + let eventsPage = try? await client.getConversationEvents(conversationID, parameters: params) |
| 92 | + self.events = eventsPage?.events ?? [] |
| 93 | + } |
| 94 | + |
| 95 | + func sendMessage(_ message: String) async { |
| 96 | + _ = try? await client.sendMessageTextEvent(conversationID, text: message) |
| 97 | + } |
| 98 | + |
| 99 | + func generateDisplayText(_ event: VGPersistentConversationEvent) -> (body: String, isUser: Bool) { |
| 100 | + var from = "System" |
| 101 | + |
| 102 | + switch event.kind { |
| 103 | + case .memberJoined: |
| 104 | + let memberJoinedEvent = event as! VGMemberJoinedEvent |
| 105 | + from = memberJoinedEvent.body.user.name |
| 106 | + return ("\(from) joined", false) |
| 107 | + case .memberLeft: |
| 108 | + let memberLeftEvent = event as! VGMemberLeftEvent |
| 109 | + from = memberLeftEvent.body.user.name |
| 110 | + return ("\(from) left", false) |
| 111 | + case .messageText: |
| 112 | + let messageTextEvent = event as! VGMessageTextEvent |
| 113 | + var isUser = false |
| 114 | + |
| 115 | + if let userInfo = messageTextEvent.from as? VGEmbeddedInfo { |
| 116 | + isUser = userInfo.memberId == memberID |
| 117 | + from = isUser ? "" : "\(userInfo.user.name): " |
| 118 | + } |
| 119 | + |
| 120 | + return ("\(from) \(messageTextEvent.body.text)", isUser) |
| 121 | + default: |
| 122 | + return ("", false) |
| 123 | + } |
| 124 | + } |
| 125 | +} |
| 126 | + |
| 127 | +extension ChatViewModel: VGChatClientDelegate { |
| 128 | + nonisolated func chatClient(_ client: VGChatClient, didReceiveConversationEvent event: VGConversationEvent) { |
| 129 | + Task { @MainActor in |
| 130 | + self.events.append(event as! VGPersistentConversationEvent) |
| 131 | + } |
| 132 | + } |
| 133 | + |
| 134 | + nonisolated func client(_ client: VGBaseClient, didReceiveSessionErrorWith reason: VGSessionErrorReason) {} |
| 135 | +} |
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