index.ts

/* This code sample provides a starter kit to implement server side logic for your Teams App in TypeScript,
 * refer to https://docs.microsoft.com/en-us/azure/azure-functions/functions-reference for complete Azure Functions
 * developer guide.
 */

// Import polyfills for fetch required by msgraph-sdk-javascript.
import "isomorphic-fetch";

import { Context, HttpRequest } from "@azure/functions";
import { Client } from "@microsoft/microsoft-graph-client";
import { createMicrosoftGraphClient, IdentityType, TeamsFx, UserInfo } from "@microsoft/teamsfx";

import { getInstallationId } from "./getInstallationId";

interface Response {
  status: number;
  body: { [key: string]: any };
}

type TeamsfxContext = { [key: string]: any };

/**
 * This function handles requests from teamsfx client.
 * The HTTP request should contain an SSO token queried from Teams in the header.
 * Before trigger this function, teamsfx binding would process the SSO token and generate teamsfx configuration.
 *
 * This function initializes the teamsfx SDK with the configuration and calls these APIs:
 * - TeamsFx().setSsoToken() - Construct teamsfx instance with the received SSO token and initialized configuration.
 * - getUserInfo() - Get the user's information from the received SSO token.
 * - createMicrosoftGraphClient() - Get a graph client to access user's Microsoft 365 data.
 *
 * The response contains multiple message blocks constructed into a JSON object, including:
 * - An echo of the request body.
 * - The display name encoded in the SSO token.
 * - Current user's Microsoft 365 profile if the user has consented.
 *
 * @param {Context} context - The Azure Functions context object.
 * @param {HttpRequest} req - The HTTP request.
 * @param {teamsfxContext} TeamsfxContext - The context generated by teamsfx binding.
 */
export default async function run(
  context: Context,
  req: HttpRequest,
  teamsfxContext: TeamsfxContext
): Promise<Response> {
  context.log("HTTP trigger function processed a request.");

  // Initialize response.
  const res: Response = {
    status: 200,
    body: {},
  };

  // Put an echo into response body.
  res.body.receivedHTTPRequestBody = req.headers || "";

  // Prepare access token.
  const accessToken: string = teamsfxContext["AccessToken"];
  if (!accessToken) {
    return {
      status: 400,
      body: {
        error: "No access token was found in request header.",
      },
    };
  }

  // Construct teamsfx.
  let teamsfx: TeamsFx;
  try {
    teamsfx = new TeamsFx().setSsoToken(accessToken);
  } catch (e) {
    context.log.error(e);
    return {
      status: 500,
      body: {
        error:
          "Failed to construct TeamsFx using your accessToken. " +
          "Ensure your function app is configured with the right Azure AD App registration.",
      },
    };
  }

  /////
  try {
    // do sth here, to call activity notification api
    //
    const graphClient_userId: Client = await createMicrosoftGraphClient(teamsfx, ["User.Read"]);
    const userId = await graphClient_userId.api("/me").get()["id"];
    // get installationId
    const installationId = await getInstallationId(teamsfx, userId);
    let postbody = {
      topic: {
        source: "entityUrl",
        value:
          "https://graph.microsoft.com/v1.0/users/" +
          userId +
          "/teamwork/installedApps/" +
          installationId,
      },
      activityType: "taskCreated",
      previewText: {
        content: "Task Created",
      },
      // templateParameters: [
      //   {
      //     name: "taskId",
      //     value: "12322",
      //   },
      // ],
    };

    let teamsfx_app: TeamsFx;
    teamsfx_app = new TeamsFx(IdentityType.App);
    const graphClient: Client = createMicrosoftGraphClient(teamsfx_app, [".default"]);
    await graphClient.api("users/" + userId + "/teamwork/sendActivityNotification").post(postbody);
  } catch (e) {
    console.log(e);
  }

  // Query user's information from the access token.
  try {
    const currentUser: UserInfo = await teamsfx.getUserInfo();
    if (currentUser && currentUser.displayName) {
      res.body.userInfoMessage = `User display name is ${currentUser.displayName}.`;
    } else {
      res.body.userInfoMessage = "No user information was found in access token.";
    }
  } catch (e) {
    context.log.error(e);
    return {
      status: 400,
      body: {
        error: "Access token is invalid.",
      },
    };
  }

  // Create a graph client to access user's Microsoft 365 data after user has consented.
  try {
    const graphClient: Client = createMicrosoftGraphClient(teamsfx, [".default"]);
    const profile: any = await graphClient.api("/me").get();
    res.body.graphClientMessage = profile;
  } catch (e) {
    context.log.error(e);
    return {
      status: 500,
      body: {
        error:
          "Failed to retrieve user profile from Microsoft Graph. The application may not be authorized.",
      },
    };
  }

  return res;
}