class-validator-multi-lang/esm2015/decorator/object/IsInstance.js

Decorator-based property validation for classes.

import { buildMessage, ValidateBy } from '../common/ValidateBy';
import { getText } from '../get-text';
export const IS_INSTANCE = 'isInstance';
/**
 * Checks if the value is an instance of the specified object.
 */
export function isInstance(object, targetTypeConstructor) {
    return (targetTypeConstructor && typeof targetTypeConstructor === 'function' && object instanceof targetTypeConstructor);
}
/**
 * Checks if the value is an instance of the specified object.
 */
export function IsInstance(targetType, validationOptions) {
    return ValidateBy({
        name: IS_INSTANCE,
        constraints: [targetType],
        validator: {
            validate: (value, args) => isInstance(value, args.constraints[0]),
            defaultMessage: buildMessage((eachPrefix, args) => {
                if (args.constraints[0]) {
                    return (eachPrefix +
                        getText(`$property must be an instance of $constraint1name`).replace('$constraint1name', (args && args.constraints && args.constraints[0].name)));
                }
                else {
                    return (eachPrefix +
                        getText(`$IS_INSTANCE decorator expects and object as value, but got falsy value.`).replace('$IS_INSTANCE', IS_INSTANCE));
                }
            }, validationOptions),
        },
    }, validationOptions);
}
//# sourceMappingURL=IsInstance.js.map