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

   1 import { HttpErrorResponse } from '@angular/common/http'
   2 import { Injectable } from '@angular/core'
   3 import { dateToHuman } from '@app/shared/misc/utils'
   4 import { Observable } from 'rxjs/Observable'
   5 import { ResultList } from '../../../../../shared'
   6
   7 @Injectable()
   8 export class RestExtractor {
   9
  10   extractDataBool () {
  11     return true
  12   }
  13
  14   applyToResultListData <T> (result: ResultList<T>, fun: Function, additionalArgs?: any[]): ResultList<T> {
  15     const data: T[] = result.data
  16     const newData: T[] = []
  17
  18     data.forEach(d => newData.push(fun.apply(this, [ d ].concat(additionalArgs))))
  19
  20     return {
  21       total: result.total,
  22       data: newData
  23     }
  24   }
  25
  26   convertResultListDateToHuman <T> (result: ResultList<T>, fieldsToConvert: string[] = [ 'createdAt' ]): ResultList<T> {
  27     return this.applyToResultListData(result, this.convertDateToHuman, [ fieldsToConvert ])
  28   }
  29
  30   convertDateToHuman (target: object, fieldsToConvert: string[]) {
  31     fieldsToConvert.forEach(field => target[field] = dateToHuman(target[field]))
  32
  33     return target
  34   }
  35
  36   handleError (err: HttpErrorResponse) {
  37     let errorMessage
  38
  39     if (err.error instanceof Error) {
  40       // A client-side or network error occurred. Handle it accordingly.
  41       errorMessage = err.error.message
  42       console.error('An error occurred:', errorMessage)
  43     } else if (err.status !== undefined) {
  44       // A server-side error occurred.
  45       if (err.error) {
  46         if (err.error.errors) {
  47           const errors = err.error.errors
  48           const errorsArray: string[] = []
  49
  50           Object.keys(errors).forEach(key => {
  51             errorsArray.push(errors[key].msg)
  52           })
  53
  54           errorMessage = errorsArray.join('. ')
  55         } else if (err.error.error) {
  56           errorMessage = err.error.error
  57         }
  58       } else if (err.status === 413) {
  59         errorMessage = 'Request is too large for the server. Please contact you administrator if you want to increase the limit size.'
  60       }
  61
  62       errorMessage = errorMessage ? errorMessage : 'Unknown error.'
  63       console.error(`Backend returned code ${err.status}, body was: ${errorMessage}`)
  64     } else {
  65       errorMessage = err
  66     }
  67
  68     const errorObj = {
  69       message: errorMessage,
  70       status: undefined,
  71       body: undefined
  72     }
  73
  74     if (err.status) {
  75       errorObj.status = err.status
  76       errorObj.body = err.error
  77     }
  78
  79     return Observable.throw(errorObj)
  80   }
  81 }