ngrx-forms/esm2015/src/group/reducer/set-value.js

Proper integration of forms in Angular 4 applications using ngrx

import { SetValueAction } from '../../actions';
import { formStateReducer } from '../../reducer';
import { computeGroupState, createChildState } from '../../state';
import { childReducer } from './util';
export function setValueReducer(state, action) {
    if (action.type !== SetValueAction.TYPE) {
        return state;
    }
    if (action.controlId !== state.id) {
        return childReducer(state, action);
    }
    if (state.value === action.value) {
        return state;
    }
    if (action.value instanceof Date) {
        throw new Error('Date values are not supported. Please used serialized strings instead.');
    }
    const value = action.value;
    const controls = Object.keys(value)
        .reduce((c, key) => {
        // tslint:disable-next-line:prefer-conditional-expression
        if (!state.controls[key]) {
            Object.assign(c, { [key]: createChildState(`${state.id}.${key}`, value[key]) });
        }
        else {
            Object.assign(c, { [key]: formStateReducer(state.controls[key], new SetValueAction(state.controls[key].id, value[key])) });
        }
        return c;
    }, {});
    return computeGroupState(state.id, controls, value, state.errors, state.pendingValidations, state.userDefinedProperties, {
        wasOrShouldBeDirty: state.isDirty,
        wasOrShouldBeEnabled: state.isEnabled,
        wasOrShouldBeTouched: state.isTouched,
        wasOrShouldBeSubmitted: state.isSubmitted,
    });
}
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