export declare namespace CSV {
    class ParseToArrayDto {
        constructor(csv?: string, rowSeparator?: string, columnSeparator?: string);
        /**
         * CSV text to parse
         * @default name,age\nJohn,30
         */
        csv: string;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
    }
    class ParseToJsonDto {
        constructor(csv?: string, headerRow?: number, dataStartRow?: number, rowSeparator?: string, columnSeparator?: string, numberColumns?: string[]);
        /**
         * CSV text to parse
         * @default name,age\nJohn,30\nJane,25
         */
        csv: string;
        /**
         * Row index where headers are located
         * @default 0
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        headerRow?: number;
        /**
         * Row index where data starts
         * @default 1
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        dataStartRow?: number;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
        /**
         * Column names that should be converted to numbers
         * @default undefined
         * @optional true
         */
        numberColumns?: string[];
    }
    class ParseToJsonWithHeadersDto {
        constructor(csv?: string, headers?: string[], dataStartRow?: number, rowSeparator?: string, columnSeparator?: string, numberColumns?: string[]);
        /**
         * CSV text to parse
         * @default John,30\nJane,25
         */
        csv: string;
        /**
         * Custom header names to use
         * @default ["name", "age"]
         */
        headers: string[];
        /**
         * Row index where data starts
         * @default 0
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        dataStartRow?: number;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
        /**
         * Column names that should be converted to numbers
         * @default undefined
         * @optional true
         */
        numberColumns?: string[];
    }
    class QueryColumnDto {
        constructor(csv?: string, column?: string, headerRow?: number, dataStartRow?: number, rowSeparator?: string, columnSeparator?: string, asNumber?: boolean);
        /**
         * CSV text to query
         * @default name,age\nJohn,30\nJane,25
         */
        csv: string;
        /**
         * Column name to query
         * @default name
         */
        column: string;
        /**
         * Row index where headers are located
         * @default 0
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        headerRow?: number;
        /**
         * Row index where data starts
         * @default 1
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        dataStartRow?: number;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
        /**
         * Convert column values to numbers
         * @default false
         */
        asNumber?: boolean;
    }
    class QueryRowsByValueDto {
        constructor(csv?: string, column?: string, value?: string, headerRow?: number, dataStartRow?: number, rowSeparator?: string, columnSeparator?: string, numberColumns?: string[]);
        /**
         * CSV text to query
         * @default name,age\nJohn,30\nJane,25
         */
        csv: string;
        /**
         * Column name to filter by
         * @default age
         */
        column: string;
        /**
         * Value to match
         * @default 30
         */
        value: string;
        /**
         * Row index where headers are located
         * @default 0
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        headerRow?: number;
        /**
         * Row index where data starts
         * @default 1
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        dataStartRow?: number;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
        /**
         * Column names that should be converted to numbers
         * @default undefined
         * @optional true
         */
        numberColumns?: string[];
    }
    class ArrayToCsvDto {
        constructor(array?: (string | number | boolean | null | undefined)[][], rowSeparator?: string, columnSeparator?: string);
        /**
         * 2D array to convert
         * @default [["name", "age"], ["John", "30"]]
         */
        array: (string | number | boolean | null | undefined)[][];
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
    }
    class JsonToCsvDto<T = Record<string, unknown>> {
        constructor(json?: T[], headers?: string[], includeHeaders?: boolean, rowSeparator?: string, columnSeparator?: string);
        /**
         * Array of JSON objects to convert
         * @default [{"name": "John", "age": "30"}]
         */
        json: T[];
        /**
         * Headers to use (in order)
         * @default ["name", "age"]
         */
        headers: string[];
        /**
         * Whether to include headers in output
         * @default true
         */
        includeHeaders?: boolean;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
    }
    class JsonToCsvAutoDto<T = Record<string, unknown>> {
        constructor(json?: T[], includeHeaders?: boolean, rowSeparator?: string, columnSeparator?: string);
        /**
         * Array of JSON objects to convert
         * @default [{"name": "John", "age": "30"}]
         */
        json: T[];
        /**
         * Whether to include headers in output
         * @default true
         */
        includeHeaders?: boolean;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
    }
    class GetHeadersDto {
        constructor(csv?: string, headerRow?: number, rowSeparator?: string, columnSeparator?: string);
        /**
         * CSV text to get headers from
         * @default name,age\nJohn,30
         */
        csv: string;
        /**
         * Row index where headers are located
         * @default 0
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        headerRow?: number;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
    }
    class GetRowCountDto {
        constructor(csv?: string, hasHeaders?: boolean, dataStartRow?: number, rowSeparator?: string, columnSeparator?: string);
        /**
         * CSV text to count rows
         * @default name,age\nJohn,30\nJane,25
         */
        csv: string;
        /**
         * Whether CSV has headers
         * @default true
         */
        hasHeaders?: boolean;
        /**
         * Row index where data starts (overrides hasHeaders if set)
         * @minimum 0
         * @maximum Infinity
         * @step 1
         */
        dataStartRow?: number;
        /**
         * Row separator (newline character)
         * @default \n
         */
        rowSeparator?: string;
        /**
         * Column separator (delimiter)
         * @default ,
         */
        columnSeparator?: string;
    }
}