import { CreatedByEntity } from '../models';
import { AttributesOf } from '../types/attributes-of.type';

export function defaultUpdateAssociationComparisonFunction<T extends CreatedByEntity<T>, S extends { id: number }>(
    childForeignKey: keyof AttributesOf<T>
) {
    return (existingRecords: T[], newChild: S) => {
        return existingRecords.findIndex(
            (existingGroup) => (existingGroup[childForeignKey] as unknown as number) === newChild.id
        );
    };
}