| 1 | using System.Text.Json; |
| 2 | |
| 3 | namespace AgentClientProtocol; |
| 4 | |
| 5 | public sealed class ClientSideConnection : IDisposable, IAcpAgent |
| 6 | { |
| 7 | readonly IAcpClient client; |
| 8 | |
| 9 | readonly CancellationTokenSource cts = new(); |
| 10 | readonly JsonRpcEndpoint endpoint; |
| 11 | |
| 12 | public ClientSideConnection(Func<IAcpAgent, IAcpClient> toClient, TextReader reader, TextWriter writer) |
| 13 | { |
| 14 | client = toClient(this); |
| 15 | |
| 16 | endpoint = new( |
| 17 | _ => new(reader.ReadLine()), |
| 18 | (s, _) => |
| 19 | { |
| 20 | writer.WriteLine(s); |
| 21 | return default; |
| 22 | }, |
| 23 | (s, _) => default |
| 24 | ); |
| 25 | |
| 26 | endpoint.SetRequestHandler(ClientMethods.FsReadTextFile, async (request, ct) => |
| 27 | { |
| 28 | AcpException.ThrowIfParamIsNull(request.Params); |
| 29 | |
| 30 | var response = await client.ReadTextFileAsync(JsonSerializer.Deserialize( |
| 31 | request.Params!.Value, |
| 32 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<ReadTextFileRequest>())!, ct); |
| 33 | |
| 34 | return new JsonRpcResponse |
| 35 | { |
| 36 | Id = request.Id, |
| 37 | Result = JsonSerializer.SerializeToElement(response, AcpJsonSerializerContext.Default.Options.GetTypeInfo<ReadTextFileResponse>()) |
| 38 | }; |
| 39 | }); |
| 40 | |
| 41 | endpoint.SetRequestHandler(ClientMethods.FsWriteTextFile, async (request, ct) => |
| 42 | { |
| 43 | AcpException.ThrowIfParamIsNull(request.Params); |
| 44 | |
| 45 | var response = await client.WriteTextFileAsync(JsonSerializer.Deserialize( |
| 46 | request.Params!.Value, |
| 47 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<WriteTextFileRequest>())!, ct); |
| 48 | |
| 49 | return new JsonRpcResponse |
| 50 | { |
| 51 | Id = request.Id, |
| 52 | Result = JsonSerializer.SerializeToElement(response, AcpJsonSerializerContext.Default.Options.GetTypeInfo<WriteTextFileResponse>()) |
| 53 | }; |
| 54 | }); |
| 55 | |
| 56 | endpoint.SetRequestHandler(ClientMethods.SessionRequestPermission, async (request, ct) => |
| 57 | { |
| 58 | AcpException.ThrowIfParamIsNull(request.Params); |
| 59 | |
| 60 | var response = await client.RequestPermissionAsync(JsonSerializer.Deserialize( |
| 61 | request.Params!.Value, |
| 62 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<RequestPermissionRequest>())!, ct); |
| 63 | |
| 64 | return new JsonRpcResponse |
| 65 | { |
| 66 | Id = request.Id, |
| 67 | Result = JsonSerializer.SerializeToElement(response, AcpJsonSerializerContext.Default.Options.GetTypeInfo<RequestPermissionResponse>()) |
| 68 | }; |
| 69 | }); |
| 70 | |
| 71 | endpoint.SetRequestHandler(ClientMethods.TerminalCreate, async (request, ct) => |
| 72 | { |
| 73 | AcpException.ThrowIfParamIsNull(request.Params); |
| 74 | |
| 75 | var response = await client.CreateTerminalAsync(JsonSerializer.Deserialize( |
| 76 | request.Params!.Value, |
| 77 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<CreateTerminalRequest>())!, ct); |
| 78 | |
| 79 | return new JsonRpcResponse |
| 80 | { |
| 81 | Id = request.Id, |
| 82 | Result = JsonSerializer.SerializeToElement(response, AcpJsonSerializerContext.Default.Options.GetTypeInfo<CreateTerminalResponse>()) |
| 83 | }; |
| 84 | }); |
| 85 | |
| 86 | endpoint.SetRequestHandler(ClientMethods.TerminalKill, async (request, ct) => |
| 87 | { |
| 88 | AcpException.ThrowIfParamIsNull(request.Params); |
| 89 | |
| 90 | var response = await client.KillTerminalCommandAsync(JsonSerializer.Deserialize( |
| 91 | request.Params!.Value, |
| 92 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<KillTerminalCommandRequest>())!, ct); |
| 93 | |
| 94 | return new JsonRpcResponse |
| 95 | { |
| 96 | Id = request.Id, |
| 97 | Result = JsonSerializer.SerializeToElement(response, AcpJsonSerializerContext.Default.Options.GetTypeInfo<KillTerminalCommandResponse>()) |
| 98 | }; |
| 99 | }); |
| 100 | |
| 101 | endpoint.SetRequestHandler(ClientMethods.TerminalOutput, async (request, ct) => |
| 102 | { |
| 103 | AcpException.ThrowIfParamIsNull(request.Params); |
| 104 | |
| 105 | var response = await client.TerminalOutputAsync(JsonSerializer.Deserialize( |
| 106 | request.Params!.Value, |
| 107 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<TerminalOutputRequest>())!, ct); |
| 108 | |
| 109 | return new JsonRpcResponse |
| 110 | { |
| 111 | Id = request.Id, |
| 112 | Result = JsonSerializer.SerializeToElement(response, AcpJsonSerializerContext.Default.Options.GetTypeInfo<TerminalOutputResponse>()) |
| 113 | }; |
| 114 | }); |
| 115 | |
| 116 | endpoint.SetRequestHandler(ClientMethods.TerminalRelease, async (request, ct) => |
| 117 | { |
| 118 | AcpException.ThrowIfParamIsNull(request.Params); |
| 119 | |
| 120 | var response = await client.ReleaseTerminalAsync(JsonSerializer.Deserialize( |
| 121 | request.Params!.Value, |
| 122 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<ReleaseTerminalRequest>())!, ct); |
| 123 | |
| 124 | return new JsonRpcResponse |
| 125 | { |
| 126 | Id = request.Id, |
| 127 | Result = JsonSerializer.SerializeToElement(response, AcpJsonSerializerContext.Default.Options.GetTypeInfo<ReleaseTerminalResponse>()) |
| 128 | }; |
| 129 | }); |
| 130 | |
| 131 | endpoint.SetRequestHandler(ClientMethods.TerminalWaitForExit, async (request, ct) => |
| 132 | { |
| 133 | AcpException.ThrowIfParamIsNull(request.Params); |
| 134 | |
| 135 | var response = await client.WaitForTerminalExitAsync(JsonSerializer.Deserialize( |
| 136 | request.Params!.Value, |
| 137 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<WaitForTerminalExitRequest>())!, ct); |
| 138 | |
| 139 | return new JsonRpcResponse |
| 140 | { |
| 141 | Id = request.Id, |
| 142 | Result = JsonSerializer.SerializeToElement(response, AcpJsonSerializerContext.Default.Options.GetTypeInfo<WaitForTerminalExitResponse>()) |
| 143 | }; |
| 144 | }); |
| 145 | |
| 146 | endpoint.SetNotificationHandler(ClientMethods.SessionUpdate, async (notification, ct) => |
| 147 | { |
| 148 | AcpException.ThrowIfParamIsNull(notification.Params); |
| 149 | |
| 150 | var sessionNotification = JsonSerializer.Deserialize( |
| 151 | notification.Params!.Value, |
| 152 | AcpJsonSerializerContext.Default.Options.GetTypeInfo<SessionNotification>())!; |
| 153 | |
| 154 | await client.SessionNotificationAsync(sessionNotification, ct); |
| 155 | }); |
| 156 | |
| 157 | endpoint.SetDefaultRequestHandler(async (request, ct) => |
| 158 | { |
| 159 | var response = await client.ExtMethodAsync(request.Method, request.Params ?? default, ct); |
| 160 | |
| 161 | return new JsonRpcResponse |
| 162 | { |
| 163 | Id = request.Id, |
| 164 | Result = response |
| 165 | }; |
| 166 | }); |
| 167 | |
| 168 | endpoint.SetDefaultNotificationHandler(async (notification, ct) => |
| 169 | { |
| 170 | await client.ExtNotificationAsync(notification.Method, notification.Params ?? default, ct); |
| 171 | }); |
| 172 | } |
| 173 | |
| 174 | async ValueTask<TResponse> RequestAsync<TRequest, TResponse>(string method, TRequest request, CancellationToken cancellationToken) |
| 175 | { |
| 176 | var response = await endpoint.SendRequestAsync(new JsonRpcRequest |
| 177 | { |
| 178 | Method = method, |
| 179 | Id = default, |
| 180 | Params = JsonSerializer.SerializeToElement(request, AcpJsonSerializerContext.Default.Options.GetTypeInfo<TRequest>()) |
| 181 | }, cancellationToken); |
| 182 | |
| 183 | if (response.Error != null) |
| 184 | { |
| 185 | throw new AcpException($"{response.Error!.Message}", response.Error.Data, response.Error.Code); |
| 186 | } |
| 187 | |
| 188 | // HACK: |
| 189 | // In a specific version of Gemini-CLI, the `authenticate` method returns a response (`result: null`) |
| 190 | // that differs from the expected schema. To accommodate this, we are ignoring the null check. |
| 191 | // Since `result` should not be null in any other case, this should generally not be a problem. |
| 192 | if (response.Result == null) |
| 193 | { |
| 194 | return default!; |
| 195 | } |
| 196 | |
| 197 | return JsonSerializer.Deserialize(response.Result.Value, AcpJsonSerializerContext.Default.Options.GetTypeInfo<TResponse>())!; |
| 198 | } |
| 199 | |
| 200 | |
| 201 | async ValueTask NotificationAsync<TNotification>(string method, TNotification notification, CancellationToken cancellationToken) |
| 202 | { |
| 203 | await endpoint.SendMessageAsync(new JsonRpcNotification |
| 204 | { |
| 205 | Method = method, |
| 206 | Params = JsonSerializer.SerializeToElement(notification, AcpJsonSerializerContext.Default.Options.GetTypeInfo<TNotification>()) |
| 207 | }, cancellationToken); |
| 208 | } |
| 209 | |
| 210 | public ValueTask<InitializeResponse> InitializeAsync(InitializeRequest request, CancellationToken cancellationToken = default) |
| 211 | { |
| 212 | return RequestAsync<InitializeRequest, InitializeResponse>(AgentMethods.Initialize, request, cancellationToken); |
| 213 | } |
| 214 | |
| 215 | public ValueTask<AuthenticateResponse> AuthenticateAsync(AuthenticateRequest request, CancellationToken cancellationToken = default) |
| 216 | { |
| 217 | return RequestAsync<AuthenticateRequest, AuthenticateResponse>(AgentMethods.Authenticate, request, cancellationToken); |
| 218 | } |
| 219 | |
| 220 | public ValueTask<NewSessionResponse> NewSessionAsync(NewSessionRequest request, CancellationToken cancellationToken = default) |
| 221 | { |
| 222 | return RequestAsync<NewSessionRequest, NewSessionResponse>(AgentMethods.SessionNew, request, cancellationToken); |
| 223 | } |
| 224 | |
| 225 | public ValueTask<PromptResponse> PromptAsync(PromptRequest request, CancellationToken cancellationToken = default) |
| 226 | { |
| 227 | return RequestAsync<PromptRequest, PromptResponse>(AgentMethods.SessionPrompt, request, cancellationToken); |
| 228 | } |
| 229 | |
| 230 | public ValueTask CancelAsync(CancelNotification notification, CancellationToken cancellationToken = default) |
| 231 | { |
| 232 | return NotificationAsync(AgentMethods.SessionCancel, notification, cancellationToken); |
| 233 | } |
| 234 | |
| 235 | public ValueTask<LoadSessionResponse> LoadSessionAsync(LoadSessionRequest request, CancellationToken cancellationToken = default) |
| 236 | { |
| 237 | return RequestAsync<LoadSessionRequest, LoadSessionResponse>(AgentMethods.SessionLoad, request, cancellationToken); |
| 238 | } |
| 239 | |
| 240 | public ValueTask<SetSessionModeResponse> SetSessionModeAsync(SetSessionModeRequest request, CancellationToken cancellationToken = default) |
| 241 | { |
| 242 | return RequestAsync<SetSessionModeRequest, SetSessionModeResponse>(AgentMethods.SessionSetMode, request, cancellationToken); |
| 243 | } |
| 244 | |
| 245 | public ValueTask<SetSessionModelResponse> SetSessionModelAsync(SetSessionModelRequest request, CancellationToken cancellationToken = default) |
| 246 | { |
| 247 | return RequestAsync<SetSessionModelRequest, SetSessionModelResponse>(AgentMethods.SessionSetModel, request, cancellationToken); |
| 248 | } |
| 249 | |
| 250 | public async ValueTask<JsonElement> ExtMethodAsync(string method, JsonElement request, CancellationToken cancellationToken = default) |
| 251 | { |
| 252 | var response = await endpoint.SendRequestAsync(new JsonRpcRequest |
| 253 | { |
| 254 | Method = method, |
| 255 | Id = default, |
| 256 | Params = request, |
| 257 | }, cancellationToken); |
| 258 | |
| 259 | if (response.Result == null) |
| 260 | { |
| 261 | throw new AcpException($"{response.Error!.Message}", response.Error.Data, response.Error.Code); |
| 262 | } |
| 263 | |
| 264 | return response.Result.Value; |
| 265 | } |
| 266 | |
| 267 | public ValueTask ExtNotificationAsync(string method, JsonElement notification, CancellationToken cancellationToken = default) |
| 268 | { |
| 269 | // writer.WriteLineAsync(notification.ToString()); |
| 270 | return default; |
| 271 | } |
| 272 | |
| 273 | public void Dispose() |
| 274 | { |
| 275 | cts.Cancel(); |
| 276 | cts.Dispose(); |
| 277 | } |
| 278 | |
| 279 | public void Open() |
| 280 | { |
| 281 | Task.Run(async () => await endpoint.ReadMessagesAsync(cts.Token)); |
| 282 | } |
| 283 | } |