import { ValidationOptions } from "../ValidationOptions";
import { buildMessage, ValidateBy } from "../common/ValidateBy";

export const ARRAY_NOT_EMPTY = "arrayNotEmpty";

/**
 * Checks if given array is not empty.
 * If null or undefined is given then this function returns false.
 */
export function arrayNotEmpty(array: unknown): boolean {
    return array instanceof Array && array.length > 0;
}

/**
 * Checks if given array is not empty.
 * If null or undefined is given then this function returns false.
 */
export function ArrayNotEmpty(validationOptions?: ValidationOptions): PropertyDecorator {
    return ValidateBy(
        {
            name: ARRAY_NOT_EMPTY,
            validator: {
                validate: (value, args): boolean => arrayNotEmpty(value),
                defaultMessage: buildMessage(
                    (eachPrefix) => eachPrefix + "$property should not be empty",
                    validationOptions
                )
            }
        },
        validationOptions
    );
}