cal.pub0.org/pages/api/integrations/office365calendar/callback.ts

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import type { NextApiRequest, NextApiResponse } from 'next';
import { getSession } from 'next-auth/client';
import prisma from '../../../../lib/prisma';
const scopes = ['offline_access', 'Calendars.Read', 'Calendars.ReadWrite'];
export default async function handler(req: NextApiRequest, res: NextApiResponse) {
const { code } = req.query;
// Check that user is authenticated
const session = await getSession({req: req});
if (!session) { res.status(401).json({message: 'You must be logged in to do this'}); return; }
const toUrlEncoded = payload => Object.keys(payload).map( (key) => key + '=' + encodeURIComponent(payload[ key ]) ).join('&');
const hostname = 'x-forwarded-host' in req.headers ? 'https://' + req.headers['x-forwarded-host'] : 'host' in req.headers ? (req.secure ? 'https://' : 'http://') + req.headers['host'] : '';
const body = toUrlEncoded({ client_id: process.env.MS_GRAPH_CLIENT_ID, grant_type: 'authorization_code', code, scope: scopes.join(' '), redirect_uri: hostname + '/api/integrations/office365calendar/callback', client_secret: process.env.MS_GRAPH_CLIENT_SECRET });
const response = await fetch('https://login.microsoftonline.com/common/oauth2/v2.0/token', { method: 'POST', headers: {
'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
}, body });
const responseBody = await response.json();
if (!response.ok) {
return res.redirect('/integrations?error=' + JSON.stringify(responseBody));
}
const whoami = await fetch('https://graph.microsoft.com/v1.0/me', { headers: { 'Authorization': 'Bearer ' + responseBody.access_token } });
const graphUser = await whoami.json();
// In some cases, graphUser.mail is null. Then graphUser.userPrincipalName most likely contains the email address.
responseBody.email = graphUser.mail ?? graphUser.userPrincipalName;
responseBody.expiry_date = Math.round((+(new Date()) / 1000) + responseBody.expires_in); // set expiry date in seconds
delete responseBody.expires_in;
const credential = await prisma.credential.create({
data: {
type: 'office365_calendar',
key: responseBody,
userId: session.user.id
}
});
return res.redirect('/integrations');
}