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import { Injectable } from '@angular/core'
import { Observable } from 'rxjs/Observable'
import { HttpErrorResponse } from '@angular/common/http'
import { Utils } from '../utils'
import { ResultList } from '../../../../../shared'
@Injectable()
export class RestExtractor {
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.call(this, d, 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: object, fieldsToConvert: string[]) {
const source = {}
fieldsToConvert.forEach(field => {
source[field] = Utils.dateToHuman(target[field])
})
return Object.assign(target, source)
}
handleError (err: HttpErrorResponse) {
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 (err.status !== undefined) {
// A server-side error occurred.
if (err.error) {
if (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.error) {
errorMessage = err.error.error
}
}
errorMessage = errorMessage ? errorMessage : 'Unknown error.'
console.error(`Backend returned code ${err.status}, body was: ${errorMessage}`)
} else {
errorMessage = err
}
const errorObj = {
message: errorMessage,
status: undefined,
body: undefined
}
if (err.status) {
errorObj.status = err.status
errorObj.body = err.error
}
return Observable.throw(errorObj)
}
}
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