Fix gitignore and add server files

.gitignore

@@ -39,9 +39,6 @@ dist/
 # Flycheck
 flycheck_*.el
 
-# server auth directory
-/server/
-
 # projectiles files
 .projectile
 

docker-compose.yml

@@ -17,7 +17,7 @@ services:
     image: mongo-express
     restart: always
     ports:
-      - 8081:8081
+      - 8181:8081
     environment:
       ME_CONFIG_MONGODB_SERVER: 'mongo'
       ME_CONFIG_MONGODB_ADMINUSERNAME: ${MONGODB_USER}

server/auth/passport.ts

@@ -0,0 +1,21 @@
+import passport from 'passport';
+import { facebookStrategy, facebookRouter } from './providers/facebook';
+import { Router } from 'express'
+import UserModel, { User } from '../models/user'
+
+export function initPassport(): void {
+  passport.serializeUser((user: User, done) => {
+    done(null, user.id);
+  });
+
+  passport.deserializeUser((id, done) => {
+    UserModel.findById(id, (err, user) => {
+      done(err, user);
+    });
+  });
+
+  passport.use('facebook', facebookStrategy());
+}
+
+export const authRouter = Router();
+authRouter.use(facebookRouter);

server/auth/providers/facebook.ts

@@ -0,0 +1,27 @@
+import { Strategy, StrategyOption, AuthenticateOptions, Profile } from 'passport-facebook';
+
+import { Router } from 'express'
+import passport from 'passport'
+
+import genericStrategy from '../strategy'
+
+const strategyOptions: StrategyOption = {
+  clientID: process.env.FACEBOOK_CLIENT_ID as string,
+  clientSecret: process.env.FACEBOOK_CLIENT_SECRET as string,
+  callbackURL: '/auth/facebook/redirect',
+  profileFields: ['id', 'displayName', 'picture.type(large)', 'email']
+}
+
+export function facebookStrategy() {
+  return new Strategy(strategyOptions, genericStrategy<Profile>('facebook'));
+}
+
+export const facebookRouter = Router()
+
+const facebookAuthenticateOptions: AuthenticateOptions = {
+  authType: 'rerequest', scope: ['email']
+}
+
+facebookRouter.get('/facebook', passport.authenticate('facebook', facebookAuthenticateOptions));
+facebookRouter.get('/facebook/redirect',
+  passport.authenticate('facebook', { successRedirect: '/museo', failureRedirect: '/' }));

server/auth/strategy.ts

@@ -0,0 +1,48 @@
+import { Profile } from 'passport'
+import UserModel, { User } from '../models/user'
+import { authProviders } from '../types'
+
+type doneCallback = (error: string | null, user?: Promise<User> | User | boolean) => void
+
+function genericStrategy<ProfileT extends Profile>(provider: authProviders) {
+    return async (
+        _accessToken: string,
+        _refreshToken: string,
+        profile: ProfileT,
+        done: doneCallback
+    ) => {
+        if (!profile.emails?.[0].value) {
+            console.error(`${provider} Email permission not provided`)
+            return done(null, false);
+        }
+
+        try {
+            const user = await UserModel.findOne({ provider, providerId: profile.id }).exec();
+
+            console.info(`${provider} user found. Logging in.`);
+
+            if (user) {
+                return done(null, user);
+            }
+
+            console.info(`${provider} user not found. Creating.`);
+
+            const newUser = new UserModel({
+                providerId: profile.id,
+                name: profile.displayName,
+                provider,
+                email: profile.emails?.[0].value,
+                photo: profile.photos?.[0].value,
+            }).save((err: string) => {
+                if (err) throw (err);
+            });
+
+            return done(null, newUser);
+
+        } catch (e) {
+            return done(e);
+        }
+    }
+}
+
+export default genericStrategy

server/models/user.ts

@@ -0,0 +1,36 @@
+import { model, Schema, Document } from "mongoose"
+import { authProviders } from '../types'
+
+export interface User extends Document {
+  providerId: string
+  name: string
+  email: string
+  provider: authProviders
+  photo?: string
+}
+
+const userSchema = new Schema(
+  {
+    providerId: {
+      type: String,
+      required: true
+    },
+    provider: {
+      type: String,
+      required: true,
+    },
+    name: {
+      type: String,
+      required: true,
+    },
+    email: {
+      type: String,
+      required: true,
+    },
+    photo: String
+  },
+  { timestamps: true }
+)
+
+const UserModel = model<User>("User", userSchema)
+export default UserModel

server/types.ts

@@ -0,0 +1 @@
+export type authProviders = "facebook" | "twitter" | "instagram" | "google"