client/src/app/shared/rest/rest-extractor.service.ts

   1 import { Injectable } from '@angular/core'
   2 import { Response } from '@angular/http'
   3 import { Observable } from 'rxjs/Observable'
   4
   5 export interface ResultList {
   6   data: any[]
   7   total: number
   8 }
   9
  10 @Injectable()
  11 export class RestExtractor {
  12
  13   extractDataBool (res: Response) {
  14     return true
  15   }
  16
  17   extractDataList (res: Response) {
  18     const body = res.json()
  19
  20     const ret: ResultList = {
  21       data: body.data,
  22       total: body.total
  23     }
  24
  25     return ret
  26   }
  27
  28   extractDataGet (res: Response) {
  29     return res.json()
  30   }
  31
  32   handleError (res: Response) {
  33     let text = 'Server error: '
  34     text += res.text()
  35     let json = ''
  36
  37     try {
  38       json = res.json()
  39     } catch (err) {
  40       console.error('Cannot get JSON from response.')
  41     }
  42
  43     const error = {
  44       json,
  45       text
  46     }
  47
  48     console.error(error)
  49
  50     return Observable.throw(error)
  51   }
  52 }