simpleGraphClient.js

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

const { Client } = require('@microsoft/microsoft-graph-client');

/**
 * This class is a wrapper for the Microsoft Graph API.
 * See: https://developer.microsoft.com/en-us/graph for more information.
 */
class SimpleGraphClient {
    constructor(token) {
        if (!token || !token.trim()) {
            throw new Error('SimpleGraphClient: Invalid token received.');
        }

        this._token = token;

        // Get an Authenticated Microsoft Graph client using the token issued to the user.
        this.graphClient = Client.init({
            authProvider: (done) => {
                done(null, this._token); // First parameter takes an error if you can't get an access token.
            }
        });
    }

    /**
     * Collects information about the user in the bot.
     */
    async getMe() {
        return await this.graphClient
            .api('/me')
            .get().then((res) => {
                return res;
            });
    }

    // Gets the user's photo
    async GetPhotoAsync(token) {
        let graphPhotoEndpoint = 'https://graph.microsoft.com/v1.0/me/photos/240x240/$value';
        let graphRequestParams = {
            method: 'GET',
            headers: {
                'Content-Type': 'image/png',
                "authorization": "bearer " + token
            }            
        }

        let response = await fetch(graphPhotoEndpoint, graphRequestParams).catch(this.unhandledFetchError);
        if (!response.ok) {
            console.error("ERROR: ", response);
        }

        let imageBuffer = await response.arrayBuffer().catch(this.unhandledFetchError); //Get image data as raw binary data

        //Convert binary data to an image URL and set the url in state
        const imageUri = 'data:image/png;base64,' + Buffer.from(imageBuffer).toString('base64');
        return imageUri;
    }
}

exports.SimpleGraphClient = SimpleGraphClient;