Make this facebook loggin more efficient?

@hessi wrote:

Hi I have this code which gets and posts facebook data into firebase database, As you see right now the code is repeating itself all the time, I want to create a provider or something similar to make it more effcient, but I don´t know how to start becasuse the facebook credential token token is getting me crazy…

Here is the code:

facebookLogin(): void {

        let provider = new firebase.auth.FacebookAuthProvider();
        provider.addScope('user_friends');
        provider.addScope('user_birthday');
        provider.addScope('user_likes');
        provider.addScope('user_location');

        if(this.platform.is('cordova')) {
            this.fire.auth.signInWithRedirect(provider)
                .then(() => {
                this.fire.auth.getRedirectResult()
                .then(res => {
                    console.log("provider: " + res.user);
                    this.token = res.credential.accessToken;
                    this.providerUid = res.user.providerData[0].uid;
                    let userRef = firebase.database().ref(`/userProfile/${res.user.uid}/facebook/`);
                    let permissions = "id,email,first_name,last_name,gender,birthday,age_range,locale,location,currency,cover,devices,payment_pricepoints,timezone,is_verified,verified,events,music,likes,friends,friendlists";
                    let url = `https://graph.facebook.com/v2.10/${this.providerUid}?fields=${permissions}&access_token=${this.token}`;
                    this.http.get(url).subscribe(response => {
                        let user = response.json();
                        userRef.update({
                            id: user.id,
                            email: user.email,
                            firstName: user.first_name,
                            lastName: user.last_name,
                            gender: user.gender || null,
                            birthday: user.birthday || null,
                            age_range: user.age_range || null,
                            locale: user.locale || null,
                            location: user.location || null,
                            cover: user.cover || null,
                            devices: user.devices || null,
                            payment_pricepoints: user.payment_pricepoints || null,
                            timezone: user.timezone || null,
                            is_verified: user.is_verified,
                            verified: user.verified,
                            events: user.events || null,
                            music: user.music || null,
                            likes: user.likes || null,
                            friends: user.friends || null,
                            friendlists: user.friendlists || null
                        });
                    });
                    this.navCtrl.setRoot(HomePage);
                });
                });
        } else {
            this.fire.auth.signInWithPopup(provider)
                .then(res => {
                    console.log("provider: " + res.user);
                    this.token = res.credential.accessToken;
                    this.providerUid = res.user.providerData[0].uid;
                    let userRef = firebase.database().ref(`/userProfile/${res.user.uid}/facebook/`);
                    let permissions = "id,email,first_name,last_name,gender,birthday,age_range,locale,location,currency,cover,devices,payment_pricepoints,timezone,is_verified,verified,events,music,likes,friends,friendlists";
                        let url = `https://graph.facebook.com/v2.10/${this.providerUid}?fields=${permissions}&access_token=${this.token}`;
                        this.http.get(url).subscribe(response => {
                            let user = response.json();
                            userRef.update({
                                id: user.id,
                                email: user.email,
                                firstName: user.first_name,
                                lastName: user.last_name,
                                gender: user.gender || null,
                                birthday: user.birthday || null,
                                age_range: user.age_range || null,
                                locale: user.locale || null,
                                location: user.location || null,
                                cover: user.cover || null,
                                devices: user.devices || null,
                                payment_pricepoints: user.payment_pricepoints || null,
                                timezone: user.timezone || null,
                                is_verified: user.is_verified,
                                verified: user.verified,
                                events: user.events || null,
                                music: user.music || null,
                                likes: user.likes || null,
                                friends: user.friends || null,
                                friendlists: user.friendlists || null
                            });
                        });
                    this.navCtrl.setRoot(HomePage);
                });
        }

    }

as you see I have to duplicate the http subscription, so my question is, how van I put this thing in a provider?, and call it without losing the credential token value?

Thanks

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