@buka/class-transformer-extra/dist/esm/src/boolean/to-boolean.js

class-transformer-extra contains methods that's aren't included in the class-transform package.

import { Transform } from 'class-transformer';
function matchBasicType(basicType, value) {
    if (typeof basicType === 'function')
        return basicType(value);
    return basicType === value;
}
function matchBasicTypes(basicTypes, value) {
    return basicTypes.some((basicType) => matchBasicType(basicType, value));
}
function buildMapping(falseValuesOrTransformer, options) {
    if (typeof falseValuesOrTransformer === 'function') {
        return (value) => {
            if (options?.optional && value === undefined)
                return undefined;
            return falseValuesOrTransformer(value);
        };
    }
    const falseValues = falseValuesOrTransformer;
    return (value) => {
        if (options?.optional && value === undefined)
            return undefined;
        return !matchBasicTypes(falseValues, value);
    };
}
export function ToBoolean(falseValuesOrTransformer = Boolean, options) {
    if (typeof falseValuesOrTransformer !== 'function' && !Array.isArray(falseValuesOrTransformer)) {
        throw new TypeError('Invalid Parameter');
    }
    const to = buildMapping(falseValuesOrTransformer, options);
    return Transform(function ToBooleanTransform({ value }) {
        return to(value);
    }, options);
}