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Auth0 rule script
async function loginFaunaOnUserLogin(user, context, callback) {
const { Client, query: q } = require("faunadb@2.11.1"); // from Auth0 registry. See https://auth0.com/docs/rules
const client = new Client({
secret: configuration.SERVER_SECRET,
});
try {
/* return user document if present in the database */
let user_from_fauna;
try {
user_from_fauna = await client.query(
q.Get(q.Match(q.Index("users_by_email"), user.email))
);
} catch (error) {
throw new Error("No user with this email exists");
}
/* create a secret from the user's ref in the Tokens collection */
const credential = await client.query(
q.Create(q.Tokens(null), { instance: user_from_fauna.ref })
);
/* Attach the secret, user_id and role to the user_metadata */
user.user_metadata = {
secret: credential.secret,
user_id: credential.instance.id,
role: user_from_fauna.ref.collection.id.toLowerCase().slice(0, -1),
};
/* The custom claim allows us to attach the user_metadata to the returned object */
const namespace = "https://fauna.com/"; // fauna because we are using FaunaDB
context.idToken[namespace + "user_metadata"] = user.user_metadata;
auth0.users
.updateUserMetadata(user.user_id, user.user_metadata)
.then(() => callback(null, user, context))
.catch((err) => callback(err, user, context));
} catch (err) {
callback(err, user, context);
}
}
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