openaire-library/utils/properties/environment-specific.servic...

89 lines
2.9 KiB
TypeScript

import { Injectable, OnInit, PLATFORM_ID, Inject,InjectionToken , Optional } from '@angular/core';
import { isPlatformBrowser} from '@angular/common';
import { Http, Response, Headers, RequestOptions } from '@angular/http';
import { Observable, Subscription, BehaviorSubject } from 'rxjs/Rx';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/toPromise';
import { EnvProperties } from './env-properties';
import { DOCUMENT } from '@angular/platform-browser';
@Injectable()
export class EnvironmentSpecificService {
public envSpecific: EnvProperties;
public envSpecificNull: EnvProperties = null;
testBrowser: boolean;
private envSpecificSubject: BehaviorSubject<EnvProperties> = new BehaviorSubject<EnvProperties>(null);
private propertiesUrl = "/assets/env-properties.json";
private serverUrl = "http://scoobydoo.di.uoa.gr:4000";
// private serverUrl = "https://beta.explore.openaire.eu";
// private serverUrl = "https://beta.connect.openaire.eu";
constructor(private http: Http, @Inject(PLATFORM_ID) private platformId: string) {
this.testBrowser = isPlatformBrowser(platformId);
if (this.testBrowser) {
//this is only executed on the browser
}
}
public loadEnvironment() {
// Only want to do this once - if root page is revisited, it calls this again.
if (this.envSpecific === null || this.envSpecific === undefined) {
var location = this.propertiesUrl;
if(typeof document == 'undefined'){
location = this.serverUrl + this.propertiesUrl;
}else{
location = document.location.protocol +"//" + document.location.host+this.propertiesUrl;
}
console.log('Loading '+ location);
return this.http.get(location)
.map((data) => data.json())
.toPromise<EnvProperties>();
}
return Promise.resolve(this.envSpecificNull);
}
public subscribeEnvironment() {
// Only want to do this once - if root page is revisited, it calls this again.
if (this.envSpecific === null || this.envSpecific === undefined) {
console.log('Loading env-properties.json');
return this.http.get(this.propertiesUrl)
.map((data) => data.json());
}
return Observable.of(this.envSpecific);
}
public setEnvProperties(es: EnvProperties) {
// This has already been set so bail out.
if (es === null || es === undefined) {
return;
}
this.envSpecific = es;
console.log(this.envSpecific);
if (this.envSpecificSubject) {
this.envSpecificSubject.next(this.envSpecific);
}
}
/*
Call this if you want to know when EnvProperties is set.
*/
public subscribe(caller: any, callback: (caller: any, es: EnvProperties) => void) {
this.envSpecificSubject
.subscribe((es) => {
if (es === null) {
return;
}
callback(caller, es);
});
}
}