microsoft/teams.net
Publicmirrored fromhttps://github.com/microsoft/teams.netAvailable
core/samples/McpServer/Program.cs
110lines · modecode
| 1 | // Copyright (c) Microsoft Corporation. |
| 2 | // Licensed under the MIT License. |
| 3 | |
| 4 | using McpServer; |
| 5 | using Microsoft.Teams.Apps; |
| 6 | using Microsoft.Teams.Apps.Handlers; |
| 7 | using Microsoft.Teams.Apps.Schema; |
| 8 | |
| 9 | WebApplicationBuilder builder = WebApplication.CreateBuilder(args); |
| 10 | builder.Services.AddTeamsBotApplication(); |
| 11 | // State is a singleton so the same maps are shared between the bot's |
| 12 | // activity handlers and the MCP tools. Replace with a persistent store for production. |
| 13 | builder.Services.AddSingleton<State>(); |
| 14 | builder.Services.AddHttpClient<GraphClient>(); |
| 15 | builder.Services |
| 16 | .AddMcpServer() |
| 17 | .WithHttpTransport() |
| 18 | .WithTools<McpTools>(); |
| 19 | |
| 20 | WebApplication webApp = builder.Build(); |
| 21 | |
| 22 | TeamsBotApplication bot = webApp.UseTeamsBotApplication(); |
| 23 | State state = webApp.Services.GetRequiredService<State>(); |
| 24 | ILogger<Program> logger = webApp.Services.GetRequiredService<ILogger<Program>>(); |
| 25 | |
| 26 | |
| 27 | bot.OnMessage(async (context, cancellationToken) => |
| 28 | { |
| 29 | string userId = context.Activity.From?.AadObjectId ?? string.Empty; |
| 30 | string conversationId = context.Activity.Conversation?.Id ?? string.Empty; |
| 31 | |
| 32 | if (context.Activity.ServiceUrl is not null) |
| 33 | state.ServiceUrl = context.Activity.ServiceUrl; |
| 34 | |
| 35 | // cache the personal conversation_id so MCP tools can DM this user later. |
| 36 | TeamsConversation? conv = TeamsConversation.FromConversation(context.Activity.Conversation); |
| 37 | if (conv?.ConversationType == ConversationType.Personal && !string.IsNullOrEmpty(userId)) |
| 38 | { |
| 39 | state.Conversations[userId] = conversationId; |
| 40 | } |
| 41 | |
| 42 | logger.LogInformation( |
| 43 | "Received message from user {UserId} in conversation {ConversationId}. Replies to asks now arrive via adaptive card actions.", |
| 44 | userId, conversationId); |
| 45 | await context.SendActivityAsync("Hi! I'll let you know if I need anything.", cancellationToken); |
| 46 | }); |
| 47 | |
| 48 | |
| 49 | bot.OnAdaptiveCardAction(async (context, cancellationToken) => |
| 50 | { |
| 51 | AdaptiveCardAction? action = context.Activity.Value?.Action; |
| 52 | |
| 53 | switch (action?.Verb) |
| 54 | { |
| 55 | case "approval_response": |
| 56 | return HandleApprovalResponse(action, state); |
| 57 | case "ask_reply": |
| 58 | return HandleAskReply(action, state); |
| 59 | default: |
| 60 | await Task.CompletedTask; |
| 61 | return AdaptiveCardResponse.CreateMessageResponse("Unknown action"); |
| 62 | } |
| 63 | }); |
| 64 | |
| 65 | static InvokeResponse HandleApprovalResponse(AdaptiveCardAction action, State state) |
| 66 | { |
| 67 | string? approvalId = TryGetString(action.Data, "approval_id"); |
| 68 | string? decision = TryGetString(action.Data, "decision"); |
| 69 | |
| 70 | if (approvalId is not null |
| 71 | && (decision == ApprovalStatus.Approved || decision == ApprovalStatus.Rejected) |
| 72 | && state.Approvals.TryGetValue(approvalId, out string? currentDecision) |
| 73 | && state.Approvals.TryUpdate(approvalId, decision, currentDecision)) |
| 74 | { |
| 75 | if (state.ApprovalWaiters.TryRemove(approvalId, out TaskCompletionSource<string>? waiter)) |
| 76 | waiter.TrySetResult(decision); |
| 77 | return AdaptiveCardResponse.CreateMessageResponse("Response recorded"); |
| 78 | } |
| 79 | |
| 80 | return AdaptiveCardResponse.CreateMessageResponse( |
| 81 | "Unable to record response. The approval request may be invalid or expired."); |
| 82 | } |
| 83 | |
| 84 | static InvokeResponse HandleAskReply(AdaptiveCardAction action, State state) |
| 85 | { |
| 86 | string? requestId = TryGetString(action.Data, "request_id"); |
| 87 | string? reply = TryGetString(action.Data, "reply"); |
| 88 | |
| 89 | if (requestId is not null |
| 90 | && state.PendingAsks.TryGetValue(requestId, out PendingAsk? entry) |
| 91 | && entry.Status == AskStatus.Pending) |
| 92 | { |
| 93 | PendingAsk answered = entry with { Status = AskStatus.Answered, Reply = reply ?? string.Empty }; |
| 94 | if (state.PendingAsks.TryUpdate(requestId, answered, entry)) |
| 95 | { |
| 96 | if (state.ReplyWaiters.TryRemove(requestId, out TaskCompletionSource<PendingAsk>? waiter)) |
| 97 | waiter.TrySetResult(answered); |
| 98 | return AdaptiveCardResponse.CreateMessageResponse("Thanks for your reply!"); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | return AdaptiveCardResponse.CreateMessageResponse( |
| 103 | "Unable to record reply. The ask may be invalid or expired."); |
| 104 | } |
| 105 | |
| 106 | webApp.MapMcp("/mcp"); |
| 107 | webApp.Run(); |
| 108 | |
| 109 | static string? TryGetString(Dictionary<string, object>? data, string key) |
| 110 | => data is not null && data.TryGetValue(key, out object? value) ? value?.ToString() : null; |
| 111 | |