exports.auth = functions.https.onRequest((req, res) => {
    const email = req.body.email;
    const passcode = req.body.passcode;

    admin.auth().getUserByEmail(email)
        .then(user => {
            return user.uid
        })
        .then(uid => {
            return admin.firestore().collection('contracts').where('uid', '==', uid).get()
                .then(data => {
                    const contract = {uid: uid}
                    data.forEach(doc => {
                        if (doc.data().passCode == passcode) contract.id = doc.data().id
                    })

                    return contract
                })
        })
        .then(data => {
            return admin.auth().createCustomToken(data.uid)
                .then(token => {
                    res.send({token: token, contractId: data.id})
                })
        })
        .catch(err => res.send(err.message))
})