[Trunk|Library]: Add LayoutService

git-svn-id: https://svn.driver.research-infrastructures.eu/driver/dnet40/modules/uoa-services-library/trunk/ng-openaire-library/src/app@55008 d315682c-612b-4755-9ff5-7f18f6832af3

services/layout.service.ts

@@ -0,0 +1,48 @@
+import {Injectable} from '@angular/core';
+import {Http, Response} from '@angular/http';
+import {DivId} from '../../domain/divId';
+import {Observable} from 'rxjs/Observable';
+import {CustomOptions} from './servicesUtils/customOptions.class';
+
+@Injectable()
+export class LayoutService {
+    constructor(private http: Http) {
+    }
+
+    static removeNulls(obj) {
+        const isArray = obj instanceof Array;
+        for (let k in obj) {
+            if (obj[k] === null || obj[k] === '') {
+                isArray ? obj.splice(k, 1) : delete obj[k];
+            } else if (typeof obj[k] === 'object') {
+                LayoutService.removeNulls(obj[k]);
+            }
+        }
+    }
+
+    saveLayout(pid: string, url: string, layout: any) {
+        LayoutService.removeNulls(layout);
+        return this.http.post(url + 'community/' + pid + '/updateLayout', JSON.stringify(layout), CustomOptions.getAuthOptionsWithBody())
+            .map(res => <DivId> res.json())
+            .catch(this.handleError);
+    }
+
+    getLayout(pid: string, url: string) {
+        return this.http.get(url + 'community/' + pid + '/layout')
+            .map(res => <DivId> res.json())
+            .catch(this.handleError);
+    }
+
+    loadDefaultLayout(pid: string, url: string) {
+        return this.http.post(url + 'community/' + pid + '/resetLayout', null, CustomOptions.getAuthOptionsWithBody())
+            .map(res => <DivId> res.json())
+            .catch(this.handleError);
+    }
+
+    private handleError(error: Response) {
+        // in a real world app, we may send the error to some remote logging infrastructure
+        // instead of just logging it to the console
+        console.error(error);
+        return Observable.throw(error.json().error || 'Server error');
+    }
+}