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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | 10x 20x 44x 44x 44x 9x | import { Validator } from "../types";
import { isValid } from "../utils";
/**
* Combines several validators and returns a composed validator
* that applies all given validators one by one.
*
* Stops at first validator returning errors, so you can guard yourself
* by placing less strict rules first.
*
* @example
*
* ```ts
* import { compose, string, minLength } from 'compose-validators';
*
* const validate = compose(string, minLength(3));
*
* validate([]) // => { type: "string" }
* validate("") // => { minLength: 3 }
* validate("abc") // => {}
* ```
*
* @typeParam T expected value type
*
* @param validators
*/
export const compose = <T>(...validators: Validator<T>[]): Validator<T> => (
value: T
) => {
for (const validator of validators) {
const result = validator(value);
if (!isValid(result)) return result;
}
return {};
};
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