61 lines
1.8 KiB
TypeScript
61 lines
1.8 KiB
TypeScript
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import { Injectable, OnInit } from '@angular/core';
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import { Http, Response, Headers, RequestOptions } from '@angular/http';
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import { Observable, Subscription, BehaviorSubject } from 'rxjs/Rx';
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import 'rxjs/add/operator/map';
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import 'rxjs/add/operator/catch';
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import 'rxjs/add/operator/toPromise';
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import { EnvProperties } from './env-properties';
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@Injectable()
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export class EnvironmentSpecificService {
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public envSpecific: EnvProperties;
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public envSpecificNull: EnvProperties = null;
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private envSpecificSubject: BehaviorSubject<EnvProperties> = new BehaviorSubject<EnvProperties>(null);
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constructor(private http: Http) {
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console.log('EnvironmentSpecificService created');
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}
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public loadEnvironment() {
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// Only want to do this once - if root page is revisited, it calls this again.
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if (this.envSpecific === null || this.envSpecific === undefined) {
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console.log('Loading env-properties.json');
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return this.http.get('./assets/env-properties.json')
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.map((data) => data.json())
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.toPromise<EnvProperties>();
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}
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return Promise.resolve(this.envSpecificNull);
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}
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public setEnvProperties(es: EnvProperties) {
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// This has already been set so bail out.
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if (es === null || es === undefined) {
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return;
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}
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this.envSpecific = es;
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console.log(this.envSpecific);
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if (this.envSpecificSubject) {
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this.envSpecificSubject.next(this.envSpecific);
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}
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}
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/*
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Call this if you want to know when EnvProperties is set.
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*/
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public subscribe(caller: any, callback: (caller: any, es: EnvProperties) => void) {
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this.envSpecificSubject
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.subscribe((es) => {
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if (es === null) {
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return;
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}
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callback(caller, es);
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});
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}
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}
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