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

   1 import { throwError as observableThrowError } from 'rxjs'
   2 import { Injectable } from '@angular/core'
   3 import { dateToHuman } from '@app/shared/misc/utils'
   4 import { ResultList } from '../../../../../shared'
   5 import { Router } from '@angular/router'
   6 import { I18n } from '@ngx-translate/i18n-polyfill'
   7
   8 @Injectable()
   9 export class RestExtractor {
  10
  11   constructor (
  12     private router: Router,
  13     private i18n: I18n
  14   ) { }
  15
  16   extractDataBool () {
  17     return true
  18   }
  19
  20   applyToResultListData <T> (result: ResultList<T>, fun: Function, additionalArgs?: any[]): ResultList<T> {
  21     const data: T[] = result.data
  22     const newData: T[] = []
  23
  24     data.forEach(d => newData.push(fun.apply(this, [ d ].concat(additionalArgs))))
  25
  26     return {
  27       total: result.total,
  28       data: newData
  29     }
  30   }
  31
  32   convertResultListDateToHuman <T> (result: ResultList<T>, fieldsToConvert: string[] = [ 'createdAt' ]): ResultList<T> {
  33     return this.applyToResultListData(result, this.convertDateToHuman, [ fieldsToConvert ])
  34   }
  35
  36   convertDateToHuman (target: { [ id: string ]: string }, fieldsToConvert: string[]) {
  37     fieldsToConvert.forEach(field => target[field] = dateToHuman(target[field]))
  38
  39     return target
  40   }
  41
  42   handleError (err: any) {
  43     let errorMessage
  44
  45     if (err.error instanceof Error) {
  46       // A client-side or network error occurred. Handle it accordingly.
  47       errorMessage = err.error.message
  48       console.error('An error occurred:', errorMessage)
  49     } else if (typeof err.error === 'string') {
  50       errorMessage = err.error
  51     } else if (err.status !== undefined) {
  52       // A server-side error occurred.
  53       if (err.error && err.error.errors) {
  54         const errors = err.error.errors
  55         const errorsArray: string[] = []
  56
  57         Object.keys(errors).forEach(key => {
  58           errorsArray.push(errors[key].msg)
  59         })
  60
  61         errorMessage = errorsArray.join('. ')
  62       } else if (err.error && err.error.error) {
  63         errorMessage = err.error.error
  64       } else if (err.status === 413) {
  65         errorMessage = this.i18n(
  66           'Request is too large for the server. Please contact you administrator if you want to increase the limit size.'
  67         )
  68       } else if (err.status === 429) {
  69         const secondsLeft = err.headers.get('retry-after')
  70         if (secondsLeft) {
  71           const minutesLeft = Math.floor(parseInt(secondsLeft, 10) / 60)
  72           errorMessage = this.i18n('Too many attempts, please try again after {{minutesLeft}} minutes.', { minutesLeft })
  73         } else {
  74           errorMessage = this.i18n('Too many attempts, please try again later.')
  75         }
  76       } else if (err.status === 500) {
  77         errorMessage = this.i18n('Server error. Please retry later.')
  78       }
  79
  80       errorMessage = errorMessage ? errorMessage : 'Unknown error.'
  81       console.error(`Backend returned code ${err.status}, errorMessage is: ${errorMessage}`)
  82     } else {
  83       console.error(err)
  84       errorMessage = err
  85     }
  86
  87     const errorObj: { message: string, status: string, body: string } = {
  88       message: errorMessage,
  89       status: undefined,
  90       body: undefined
  91     }
  92
  93     if (err.status) {
  94       errorObj.status = err.status
  95       errorObj.body = err.error
  96     }
  97
  98     return observableThrowError(errorObj)
  99   }
 100
 101   redirectTo404IfNotFound (obj: { status: number }, status = [ 404 ]) {
 102     if (obj && obj.status && status.indexOf(obj.status) !== -1) {
 103       // Do not use redirectService to avoid circular dependencies
 104       this.router.navigate([ '/404' ], { skipLocationChange: true })
 105     }
 106
 107     return observableThrowError(obj)
 108   }
 109 }