user.service.ts

import {Injectable} from '@angular/core';
import {AuthHttp} from "angular2-jwt";
import {Headers} from "@angular/http";
import {Observable, Subject} from "rxjs";
import {User} from "./user";

@Injectable()
export class UserService {

    private profile;

    constructor(private _authHttp: AuthHttp) {
    }

    get() {
        let myHeader = new Headers();
        myHeader.append('Content-Type', 'application/json');
        return this._authHttp.get('http://127.0.0.1:3001/api/profile/', {headers: myHeader})
            .map(res => res.json());
    }

    getProfile(): Observable<any> {
        console.log('getting profile');
        var subject = new Subject<any>();
        if (this.profile === undefined) {
            console.log('profile is undefined');
            this.get().subscribe(profile=> {
                this.profile = profile;
                console.log('profile got', this.profile);
                subject.next(this.profile);
            });
        } else {
            console.log('profile is here', this.profile);
            subject.next(this.profile);
        }
        return subject.asObservable();
    }
}