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import { throwError as observableThrowError } from 'rxjs'
import { Injectable } from '@angular/core'
import { dateToHuman } from '@app/shared/misc/utils'
import { ResultList } from '../../../../../shared'
import { Router } from '@angular/router'
import { I18n } from '@ngx-translate/i18n-polyfill'
@Injectable()
export class RestExtractor {
constructor (
private router: Router,
private i18n: I18n
) { }
extractDataBool () {
return true
}
applyToResultListData <T> (result: ResultList<T>, fun: Function, additionalArgs?: any[]): ResultList<T> {
const data: T[] = result.data
const newData: T[] = []
data.forEach(d => newData.push(fun.apply(this, [ d ].concat(additionalArgs))))
return {
total: result.total,
data: newData
}
}
convertResultListDateToHuman <T> (result: ResultList<T>, fieldsToConvert: string[] = [ 'createdAt' ]): ResultList<T> {
return this.applyToResultListData(result, this.convertDateToHuman, [ fieldsToConvert ])
}
convertDateToHuman (target: { [ id: string ]: string }, fieldsToConvert: string[]) {
fieldsToConvert.forEach(field => target[field] = dateToHuman(target[field]))
return target
}
handleError (err: any) {
let errorMessage
if (err.error instanceof Error) {
// A client-side or network error occurred. Handle it accordingly.
errorMessage = err.error.message
console.error('An error occurred:', errorMessage)
} else if (typeof err.error === 'string') {
errorMessage = err.error
} else if (err.status !== undefined) {
// A server-side error occurred.
if (err.error && err.error.errors) {
const errors = err.error.errors
const errorsArray: string[] = []
Object.keys(errors).forEach(key => {
errorsArray.push(errors[key].msg)
})
errorMessage = errorsArray.join('. ')
} else if (err.error && err.error.error) {
errorMessage = err.error.error
} else if (err.status === 413) {
errorMessage = this.i18n(
'Request is too large for the server. Please contact you administrator if you want to increase the limit size.'
)
} else if (err.status === 429) {
const secondsLeft = err.headers.get('retry-after')
if (secondsLeft) {
const minutesLeft = Math.floor(parseInt(secondsLeft, 10) / 60)
errorMessage = this.i18n('Too many attempts, please try again after {{minutesLeft}} minutes.', { minutesLeft })
} else {
errorMessage = this.i18n('Too many attempts, please try again later.')
}
} else if (err.status === 500) {
errorMessage = this.i18n('Server error. Please retry later.')
}
errorMessage = errorMessage ? errorMessage : 'Unknown error.'
console.error(`Backend returned code ${err.status}, errorMessage is: ${errorMessage}`)
} else {
console.error(err)
errorMessage = err
}
const errorObj: { message: string, status: string, body: string } = {
message: errorMessage,
status: undefined,
body: undefined
}
if (err.status) {
errorObj.status = err.status
errorObj.body = err.error
}
return observableThrowError(errorObj)
}
redirectTo404IfNotFound (obj: { status: number }, status = [ 404 ]) {
if (obj && obj.status && status.indexOf(obj.status) !== -1) {
// Do not use redirectService to avoid circular dependencies
this.router.navigate([ '/404' ], { skipLocationChange: true })
}
return observableThrowError(obj)
}
}
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