simple-graph-client.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.
            }
        });
    }

    /**
     * Sends an email on the user's behalf.
     * @param {string} toAddress Email address of the email's recipient.
     * @param {string} subject Subject of the email to be sent to the recipient.
     * @param {string} content Email message to be sent to the recipient.
     */
    async sendMail(toAddress, subject, content) {
        if (!toAddress || !toAddress.trim()) {
            throw new Error('SimpleGraphClient.sendMail(): Invalid `toAddress` parameter received.');
        }
        if (!subject || !subject.trim()) {
            throw new Error('SimpleGraphClient.sendMail(): Invalid `subject`  parameter received.');
        }
        if (!content || !content.trim()) {
            throw new Error('SimpleGraphClient.sendMail(): Invalid `content` parameter received.');
        }

        // Create the email.
        const mail = {
            body: {
                content: content, // `Hi there! I had this message sent from a bot. - Your friend, ${ graphData.displayName }!`,
                contentType: 'Text'
            },
            subject: subject, // `Message from a bot!`,
            toRecipients: [{
                emailAddress: {
                    address: toAddress
                }
            }]
        };

        // Send the message.
        return await this.graphClient
            .api('/me/sendMail')
            .post({ message: mail }, (error, res) => {
                if (error) {
                    throw error;
                } else {
                    return res;
                }
            });
    }

    /**
     * Gets recent mail the user has received within the last hour and displays up to 5 of the emails in the bot.
     */
    async getRecentMail() {
        return await this.graphClient
            .api('/me/messages')
            .version('beta')
            .top(5)
            .get().then((res) => {
                return res;
            });
    }

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

    /**
     * Collects the user's manager in the bot.
     */
    async getManager() {
        return await this.graphClient
            .api('/me/manager')
            .version('beta')
            .select('displayName')
            .get().then((res) => {
                return res;
            });
    }
}

exports.SimpleGraphClient = SimpleGraphClient;