ngrx-forms/esm2015/src/update-function/set-errors.js

Proper integration of forms in Angular 4 applications using ngrx

import { SetErrorsAction } from '../actions';
import { formStateReducer } from '../reducer';
import { isFormState } from '../state';
import { ensureState } from './util';
export function setErrors(errorsOrErrorsArrayOrState, errorsOrErrorsArray, ...rest) {
    if (isFormState(errorsOrErrorsArrayOrState)) {
        const state = errorsOrErrorsArrayOrState;
        const errorsArray = Array.isArray(errorsOrErrorsArray) ? errorsOrErrorsArray : [errorsOrErrorsArray];
        const errors = errorsArray.concat(...rest).reduce((agg, err) => Object.assign(agg, err), {});
        return formStateReducer(state, new SetErrorsAction(state.id, errors));
    }
    let errorsArray = Array.isArray(errorsOrErrorsArrayOrState) ? errorsOrErrorsArrayOrState : [errorsOrErrorsArrayOrState];
    errorsArray = errorsOrErrorsArray === undefined ? errorsArray : errorsArray.concat(errorsOrErrorsArray);
    return (s) => setErrors(ensureState(s), errorsArray.concat(rest));
}
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