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     // empty
  16   }
  17
  18   extractDataBool () {
  19     return true
  20   }
  21
  22   applyToResultListData <T> (result: ResultList<T>, fun: Function, additionalArgs?: any[]): ResultList<T> {
  23     const data: T[] = result.data
  24     const newData: T[] = []
  25
  26     data.forEach(d => newData.push(fun.apply(this, [ d ].concat(additionalArgs))))
  27
  28     return {
  29       total: result.total,
  30       data: newData
  31     }
  32   }
  33
  34   convertResultListDateToHuman <T> (result: ResultList<T>, fieldsToConvert: string[] = [ 'createdAt' ]): ResultList<T> {
  35     return this.applyToResultListData(result, this.convertDateToHuman, [ fieldsToConvert ])
  36   }
  37
  38   convertDateToHuman (target: object, fieldsToConvert: string[]) {
  39     fieldsToConvert.forEach(field => target[field] = dateToHuman(target[field]))
  40
  41     return target
  42   }
  43
  44   handleError (err: any) {
  45     let errorMessage
  46
  47     if (err.error instanceof Error) {
  48       // A client-side or network error occurred. Handle it accordingly.
  49       errorMessage = err.error.message
  50       console.error('An error occurred:', errorMessage)
  51     } else if (typeof err.error === 'string') {
  52       errorMessage = err.error
  53     } else if (err.status !== undefined) {
  54       // A server-side error occurred.
  55       if (err.error && err.error.errors) {
  56         const errors = err.error.errors
  57         const errorsArray: string[] = []
  58
  59         Object.keys(errors).forEach(key => {
  60           errorsArray.push(errors[key].msg)
  61         })
  62
  63         errorMessage = errorsArray.join('. ')
  64       } else if (err.error && err.error.error) {
  65         errorMessage = err.error.error
  66       } else if (err.status === 413) {
  67         errorMessage = this.i18n(
  68           'Request is too large for the server. Please contact you administrator if you want to increase the limit size.'
  69         )
  70       } else if (err.status === 429) {
  71         const secondsLeft = err.headers.get('retry-after')
  72         if (secondsLeft) {
  73           const minutesLeft = Math.floor(parseInt(secondsLeft, 10) / 60)
  74           errorMessage = this.i18n('Too many attempts, please try again after {{minutesLeft}} minutes.', { minutesLeft })
  75         } else {
  76           errorMessage = this.i18n('Too many attempts, please try again later.')
  77         }
  78       } else if (err.status === 500) {
  79         errorMessage = this.i18n('Server error. Please retry later.')
  80       }
  81
  82       errorMessage = errorMessage ? errorMessage : 'Unknown error.'
  83       console.error(`Backend returned code ${err.status}, errorMessage is: ${errorMessage}`)
  84     } else {
  85       errorMessage = err
  86     }
  87
  88     const errorObj = {
  89       message: errorMessage,
  90       status: undefined,
  91       body: undefined
  92     }
  93
  94     if (err.status) {
  95       errorObj.status = err.status
  96       errorObj.body = err.error
  97     }
  98
  99     return observableThrowError(errorObj)
 100   }
 101
 102   redirectTo404IfNotFound (obj: { status: number }, status = [ 404 ]) {
 103     if (obj && obj.status && status.indexOf(obj.status) !== -1) {
 104       // Do not use redirectService to avoid circular dependencies
 105       this.router.navigate([ '/404' ], { skipLocationChange: true })
 106     }
 107
 108     return observableThrowError(obj)
 109   }
 110 }