statement.base.service.ts
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import { Headers, Http, Response } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/toPromise';
import 'rxjs/add/operator/map';
export abstract class StatementBaseService {
protected abstract url: string;
protected headers: Headers = new Headers({'Content-Type': 'application/json'});
constructor(protected http: Http) { }
getData(from: number = 0, to: number = 100, sort: string = null): Promise<any[]> {
let url: string = this.url;
url += '?from=' + from + '&to=' + to;
if (sort) {
url += '&sort=' + sort;
}
return this.http.get(url)
.toPromise()
.then((response: Response) => this.parseModels(response.json()))
.catch(this.handleError);
}
// search(term: string): Observable<any[]> {
// return this.http
// .get(`app/heroes/?name=${term}`)
// .map(response => response.json().data as any[]);
// }
update(id: number, data: string): Promise<any> {
return this.http.post(this.url + '/update?id=' + id, data, { headers: this.headers })
.toPromise()
.then((response: Response) => response.json())
.catch(this.handleError);
}
create(data: string): Promise<any> {
return this.http.post(this.url + '/create', data, { headers: this.headers })
.toPromise()
.then((response: Response) => this.parseModel(response.json()))
.catch(this.handleError);
}
delete(id: number): Promise<any> {
return this.http.delete(this.url + '/delete?id=' + id, { headers: this.headers })
.toPromise()
.then((response: Response) => response.json())
.catch(this.handleError);
}
public abstract createModel(): Object;
protected handleError(error: any): Promise<any> {
console.error('An error occured', error);
return Promise.reject(error.message || error);
}
protected abstract parseModels(json: any): any[];
protected abstract parseModel(json: any): any;
}