import { HypermediaAction } from 'first-npm-package-nicule/core';

export function hideFieldIfNotNull(fieldName: string): (hypermediaAction: HypermediaAction) => HypermediaAction {
    return (hypermediaAction: HypermediaAction) => {
        const { fields: oldFields, ...rest } = hypermediaAction;
        const fields = oldFields.map(({ name, type, value, ...restField }) => {
            if (name === fieldName && (value !== undefined && value !== null)) {
                type = 'hidden';
            }

            return { name, type, value, ...restField };
        });

        return {
            ...rest,
            fields
        };
    };
}