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src/services/statement.base.service.ts 1.7 KB
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1392e7de   Yarik   Awesome 
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  import { Headers, Http, Response } from '@angular/http';
  
  import 'rxjs/add/operator/toPromise';
  
  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);
    }
  
    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);
    }
026fffbd   Yarik   Awesome 
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    public abstract createModel(): Object;
1392e7de   Yarik   Awesome 
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    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;
  }