client/src/app/shared/rest/rest-data-source.ts

   1 import { Http, RequestOptionsArgs, URLSearchParams,  } from '@angular/http';
   2
   3 import { ServerDataSource } from 'ng2-smart-table';
   4
   5 export class RestDataSource extends ServerDataSource {
   6  constructor(http: Http, endpoint: string) {
   7    const options = {
   8      endPoint: endpoint,
   9      sortFieldKey: 'sort',
  10      dataKey: 'data'
  11    };
  12
  13    super(http, options);
  14  }
  15
  16  protected extractTotalFromResponse(res) {
  17     const rawData = res.json();
  18     return rawData ? parseInt(rawData.total) : 0;
  19   }
  20
  21  protected addSortRequestOptions(requestOptions: RequestOptionsArgs) {
  22     let searchParams: URLSearchParams = <URLSearchParams> requestOptions.search;
  23
  24     if (this.sortConf) {
  25       this.sortConf.forEach((fieldConf) => {
  26         const sortPrefix = fieldConf.direction === 'desc' ? '-' : '';
  27
  28         searchParams.set(this.conf.sortFieldKey, sortPrefix + fieldConf.field);
  29       });
  30     }
  31
  32     return requestOptions;
  33   }
  34
  35   protected addPagerRequestOptions(requestOptions: RequestOptionsArgs) {
  36     let searchParams: URLSearchParams = <URLSearchParams> requestOptions.search;
  37
  38     if (this.pagingConf && this.pagingConf['page'] && this.pagingConf['perPage']) {
  39       const perPage = this.pagingConf['perPage'];
  40       const page = this.pagingConf['page'];
  41
  42       const start = (page - 1) * perPage;
  43       const count = perPage;
  44
  45       searchParams.set('start', start.toString());
  46       searchParams.set('count', count.toString());
  47     }
  48
  49     return requestOptions;
  50   }
  51 }