@coven/cron@0.3.3

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import { every } from "jsr:@coven/iterables@^0.3.3";
import { isArray, isNumber } from "jsr:@coven/predicates@^0.3.3";
import type { Field } from "./Field.ts";
import { isRangeField } from "./isRangeField.ts";
import type { ListField } from "./ListField.ts";
import type { ValueOrRangeField } from "./ValueOrRangeField.ts";

const everyIsNumberOrRangeField = every<
	ValueOrRangeField<number>,
	ValueOrRangeField<number>
>((
	item,
) => isNumber(item) || isRangeField(item));

/**
 * Predicate checking if given value is a {@linkcode ListField}.
 *
 * @see {@linkcode ListField}
 * @see {@linkcode isRangeField}
 */
export const isListField = (value: Field<number>): value is ListField<number> =>
	isArray(value) &&
	everyIsNumberOrRangeField(value);