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

   1 import { of, 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
   6 @Injectable()
   7 export class RestExtractor {
   8
   9   extractDataBool () {
  10     return true
  11   }
  12
  13   applyToResultListData <T> (result: ResultList<T>, fun: Function, additionalArgs?: any[]): ResultList<T> {
  14     const data: T[] = result.data
  15     const newData: T[] = []
  16
  17     data.forEach(d => newData.push(fun.apply(this, [ d ].concat(additionalArgs))))
  18
  19     return {
  20       total: result.total,
  21       data: newData
  22     }
  23   }
  24
  25   convertResultListDateToHuman <T> (result: ResultList<T>, fieldsToConvert: string[] = [ 'createdAt' ]): ResultList<T> {
  26     return this.applyToResultListData(result, this.convertDateToHuman, [ fieldsToConvert ])
  27   }
  28
  29   convertDateToHuman (target: object, fieldsToConvert: string[]) {
  30     fieldsToConvert.forEach(field => target[field] = dateToHuman(target[field]))
  31
  32     return target
  33   }
  34
  35   handleError (err: any) {
  36     let errorMessage
  37
  38     if (err.error instanceof Error) {
  39       // A client-side or network error occurred. Handle it accordingly.
  40       errorMessage = err.error.message
  41       console.error('An error occurred:', errorMessage)
  42     } else if (typeof err.error === 'string') {
  43       errorMessage = err.error
  44     } else if (err.status !== undefined) {
  45       // A server-side error occurred.
  46       if (err.error && 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 && err.error.error) {
  56         errorMessage = err.error.error
  57       } else if (err.status === 413) {
  58         errorMessage = 'Request is too large for the server. Please contact you administrator if you want to increase the limit size.'
  59       } else if (err.status === 429) {
  60         const secondsLeft = err.headers.get('retry-after')
  61         if (secondsLeft) {
  62           const minutesLeft = Math.floor(parseInt(secondsLeft, 10) / 60)
  63           errorMessage = 'Too many attempts, please try again after ' + minutesLeft + ' minutes.'
  64         } else {
  65           errorMessage = 'Too many attempts, please try again later.'
  66         }
  67       } else if (err.status === 500) {
  68         errorMessage = 'Server error. Please retry later.'
  69       }
  70
  71       errorMessage = errorMessage ? errorMessage : 'Unknown error.'
  72       console.error(`Backend returned code ${err.status}, errorMessage is: ${errorMessage}`)
  73     } else {
  74       errorMessage = err
  75     }
  76
  77     const errorObj = {
  78       message: errorMessage,
  79       status: undefined,
  80       body: undefined
  81     }
  82
  83     if (err.status) {
  84       errorObj.status = err.status
  85       errorObj.body = err.error
  86     }
  87
  88     return observableThrowError(errorObj)
  89   }
  90 }