schemas.ts

import { z } from 'zod';

/**
 * Zod schema to parse strings that are booleans.
 * Use to parse <input type="hidden" value="true" /> values.
 * @example
 * ```ts
 * BoolAsString.parse('true') -> true
 * ```
 */
export const BoolAsString = z
  .string()
  .regex(/^(true|false)$/, 'Must be a boolean string ("true" or "false")')
  .transform((value) => value === 'true');

/**
 * Zod schema to parse checkbox formdata.
 * Use to parse <input type="checkbox" /> values.
 * @example
 * ```ts
 * CheckboxAsString.parse('on') -> true
 * CheckboxAsString.parse(undefined) -> false
 * ```
 */
export const CheckboxAsString = z
  .literal('on')
  .optional()
  .transform((value) => value === 'on');

/**
 * Zod schema to parse strings that are integers.
 * Use to parse  <input type="number" /> values.
 * @example
 * ```ts
 * IntAsString.parse('3') -> 3
 * ```
 */
export const IntAsString = z
  .string()
  .regex(/^-?\d+$/, 'Must be an integer string')
  .transform((val) => parseInt(val, 10));

/**
 * Zod schema to parse strings that are numbers.
 * Use to parse <input type="number" step="0.1" /> values.
 * @example
 * ```ts
 * NumAsString.parse('3.14') -> 3.14
 * ```
 */
export const NumAsString = z
  .string()
  .regex(/^-?\d*\.?\d+$/, 'Must be a number string')
  .transform(Number);