Intlayer

type ElementType = 'string' | 'number' | 'boolean' | 'object' | 'array'; type ElementValidator<T> = (value: T) => boolean | string[]; /** * Validates a email field. * @param value The value to validate. * @param entityName The name of the entity being validated. * @param minLength The minimum length of the string. * @param maxLength The maximum length of the string. * @returns An array of validation errors. */ export const validateArray = <T = unknown>( value: T[], entityName = 'Array', elementType?: ElementType, elementValidator?: ElementValidator<T>, minLength = 0, maxLength = undefined ): string[] => { const errors: string[] = []; if (!Array.isArray(value)) { errors.push(`${entityName} must be an array.`); } else if (minLength && value.length < minLength) { errors.push(`${entityName} must be at least ${minLength} items long.`); } else if (maxLength && value.length > maxLength) { errors.push(`${entityName} must be at most ${maxLength} items long.`); } else if (elementType) { const isValid = value.every((element) => { return typeof element === elementType; }); if (!isValid) { errors.push(`${entityName} must contain only ${elementType} elements.`); } } else if (elementValidator) { const isValidOrErrorList = value.every(elementValidator); if (Array.isArray(isValidOrErrorList)) { const isValid = isValidOrErrorList.length > 0; if (!isValid) { errors.push(...isValidOrErrorList); } } else { const isValid = isValidOrErrorList; if (!isValid) { errors.push(`${entityName} must contain valid elements.`); } } } return errors; };