import Validator from './Validator';
export default class ValidatorRules {
    private validator;
    private paramName;
    /**
     * Constructor
     */
    constructor(validator: Validator, paramName: string);
    /**
     * Ensures the parameter is present and not undefined.
     */
    required(customErrorMessage?: string): this;
    /**
     * A placeholder for future validation that may be conditionally applied.
     */
    sometimes(): this;
    /**
     * Validates the minimum value or length of the parameter.
     * Supports strings, numbers, and arrays.
     */
    min(num: number, customErrorMessage?: string): this;
    /**
     * Validates the maximum value or length of the parameter.
     * Supports strings, numbers, and arrays.
     */
    max(num: number, customErrorMessage?: string): this;
    /**
     * Ensures the parameter is not null.
     */
    notNullable(customErrorMessage?: string): this;
    /**
     * Checks if the parameter value is of type string.
     */
    shouldBeString(customErrorMessage?: string): this;
    /**
     * Checks if the parameter value is of type string or null
     */
    shouldBeStringOrNull(customErrorMessage?: string): this;
    /**
     * Checks if the parameter value is of type number
     */
    shouldBeNumber(customErrorMessage?: string): this;
    /**
     * Checks if the parameter value is of type number or null
     */
    shouldBeNumberOrNull(customErrorMessage?: string): this;
    /**
     * Checks if the parameter value is of type boolean.
     */
    shouldBeBoolean(customErrorMessage?: string): this;
    /**
     * Checks if the parameter value is of type boolean or null
     */
    shouldBeBooleanOrNull(customErrorMessage?: string): this;
    /**
     * Checks if the parameter value is an array.
     */
    shouldBeArray(customErrorMessage?: string): this;
    /**
     * Checks if the parameter value is an object (and not null or an array).
     */
    shouldBeObject(customErrorMessage?: string): this;
    /**
     * Validates a single nested object using provided validation rules.
     */
    validateObject(validationRules: (validator: Validator) => void): this;
    /**
     * Validates each object in an array of objects using provided validation rules.
     */
    validateArrayOfObjects(validationRules: (validator: Validator) => void): this;
    /**
     * Validates each value to be a string in an array of strings
     */
    validateArrayOfStrings(customErrorMessage?: string): this;
    /**
     * Validates each value to be a string in an array of strings
     */
    validateArrayOfNumbers(customErrorMessage?: string): this;
    /**
     * Validates a value to ensure it is a valid email address.
     * Uses a regular expression to check the format of the value.
     */
    email(customErrorMessage?: string): this;
    /**
     * Validates a value to ensure it is a valid email address or null.
     * Uses a regular expression to check the format of the value.
     */
    emailOrNull(customErrorMessage?: string): this;
    /**
     * Validates that the value is within a predefined list of values.
     */
    inList(values: any[], customErrorMessage?: string): this;
    /**
     * Validates the value against a custom regular expression pattern.
     */
    regex(pattern: RegExp, customErrorMessage?: string): this;
    /**
     * Validates that the value of the current field is different from another field's value.
     */
    different(otherParamName: string, customErrorMessage?: string): this;
    /**
     * Validates that the value is one of the enum's values.
     * Useful for ensuring a value matches one of the predefined options in an enumeration.
     */
    enum(enumObject: object, customErrorMessage?: string): this;
    /**
     * Validates that the value is one of the enum's values or null.
     * Useful for ensuring a value matches one of the predefined options in an enumeration.
     */
    enumOrNull(enumObject: object, customErrorMessage?: string): this;
    /**
     * Allows for custom validation logic defined by the user.
     * The custom function provided should return true if the value passes the validation,
     * and false otherwise. An optional custom error message can be provided.
     */
    customValidation(validationFunction: (value: any) => boolean, customErrorMessage?: string): this;
    /**
     * Merges errors from a child validator into the current validator, optionally with an index for array elements.
     */
    private mergeErrors;
    /**
     * Sets an error message in the validator, allowing for an optional custom error message.
     */
    private setError;
}