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passports.js
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const passport = require("passport");
const User = require("../models/User");
const FacebookStrategy = require("passport-facebook");
passport.use(User.createStrategy());
passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());
// estrategia de facebook
function facebookCallback(accessToken, refreshToken, profile, cb) {
User.findOne({ facebookId: profile.id }).then(user => {
if (user) {
return cb(null, user);
}
const { id: facebookId, displayName } = profile;
let { email } = profile;
email = "David.Zavala@localhost.com";
// si llega un email que ya tenemos en la base de datos entonces el usuario
// ya se registró y solo tenemos que actualizarlo para no generar 2 perfiles
// de la misma persona
User.findOneAndUpdate(
{ email, facebookId: { $exists: false } },
{ $set: { facebookId } },
{ new: true }
)
.then(user => {
if (user) {
return cb(null, user);
}
// en el schema tenemos el name y email como propiedades requeridas
const [name, lastname] = displayName.split(" ");
email = email ? email : `${name}.${lastname}@localhost.com`;
User.create({ facebookId, displayName, name, lastname, email }).then(
newUser => {
return cb(null, newUser);
}
);
})
.catch(err => {
cb(err);
});
});
}
passport.use(
new FacebookStrategy(
{
clientID: process.env.FBAPPID,
clientSecret: process.env.FBSECRET,
callbackURL: "http://localhost:3000/auth/facebook/callback"
},
facebookCallback
)
);
passport.serializeUser(function(user, done) {
done(null, user._id);
});
passport.deserializeUser(function(id, done) {
User.findById(id, function(err, user) {
if (!err) done(null, user);
else done(err, null);
});
});
module.exports = passport;