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