Implement meeting assistant v1

2026-05-20 02:06:16 +02:00
parent 90df1edc03
commit 0297bcc0f6
120 changed files with 11883 additions and 180 deletions
@@ -0,0 +1,78 @@
+using System.Net.WebSockets;
+using System.Text;
+
+namespace MeetingAssistant.Transcription;
+
+public sealed class ClientFunAsrWebSocketConnectionFactory : IFunAsrWebSocketConnectionFactory
+{
+    public async Task<IFunAsrWebSocketConnection> ConnectAsync(Uri endpoint, CancellationToken cancellationToken)
+    {
+        var socket = new ClientWebSocket();
+        await socket.ConnectAsync(endpoint, cancellationToken);
+        return new ClientFunAsrWebSocketConnection(socket);
+    }
+}
+
+public sealed class ClientFunAsrWebSocketConnection : IFunAsrWebSocketConnection
+{
+    private readonly ClientWebSocket socket;
+
+    public ClientFunAsrWebSocketConnection(ClientWebSocket socket)
+    {
+        this.socket = socket;
+    }
+
+    public Task SendTextAsync(string message, CancellationToken cancellationToken)
+    {
+        return socket.SendAsync(
+            Encoding.UTF8.GetBytes(message),
+            WebSocketMessageType.Text,
+            endOfMessage: true,
+            cancellationToken);
+    }
+
+    public async Task SendBinaryAsync(ReadOnlyMemory<byte> message, CancellationToken cancellationToken)
+    {
+        await socket.SendAsync(message, WebSocketMessageType.Binary, endOfMessage: true, cancellationToken);
+    }
+
+    public async Task<string?> ReceiveTextAsync(CancellationToken cancellationToken)
+    {
+        var buffer = new byte[8192];
+        using var message = new MemoryStream();
+
+        while (true)
+        {
+            var result = await socket.ReceiveAsync(buffer, cancellationToken);
+            if (result.MessageType == WebSocketMessageType.Close)
+            {
+                return null;
+            }
+
+            if (result.MessageType != WebSocketMessageType.Text)
+            {
+                continue;
+            }
+
+            message.Write(buffer, 0, result.Count);
+            if (result.EndOfMessage)
+            {
+                return Encoding.UTF8.GetString(message.ToArray());
+            }
+        }
+    }
+
+    public async Task CloseOutputAsync(CancellationToken cancellationToken)
+    {
+        if (socket.State is WebSocketState.Open or WebSocketState.CloseReceived)
+        {
+            await socket.CloseOutputAsync(WebSocketCloseStatus.NormalClosure, "meeting assistant finished sending audio", cancellationToken);
+        }
+    }
+
+    public ValueTask DisposeAsync()
+    {
+        socket.Dispose();
+        return ValueTask.CompletedTask;
+    }
+}