import type { LocationQueryValue } from 'vue-router';
import type { Id } from '~/shared/types/common';

export function queryToString(item?: null | LocationQueryValue | LocationQueryValue[]) {
	if (item === null)
		return "";
	if (item instanceof Array)
		return queryToString(item[0])
	return item;
}

export function queryToNumber(item?: null | LocationQueryValue | LocationQueryValue[]) {
	if (item === null || item === undefined)
		return undefined;
	if (item instanceof Array)
		return queryToNumber(item[0])
	return Number.parseInt(item, 10);
}

export function idMap<T extends { id: Id }>(entities: T[]) {
	return new Map(entities.map(entity => [entity.id, entity]));
}