export declare const parseFile: (file: File) => Promise<string>;
/**
 *
 * @param contents Windows 风格的换行符是 \r\n，而 Linux 和 macOS 使用的是 \n。
 * @returns   // 统一将行结束符转换为 \n
 */
export declare function uniformedText(contents: any): any;
export declare function extractHeaderAndDelimiter(contents: string): {
    header: any[];
    quoting: boolean;
    delimiter: string;
};
export declare function detectDataTypes(dataLines: any, columnCount: any): any[];
export declare function isBoolean(value: any): boolean;
export declare function isNumber(value: any): boolean;
export declare function getFileSize(size: any): string;
export interface IMeta {
    header: string[];
    delimiter: string;
    size: string;
    name: string;
    type: 'csv' | 'json' | 'sql';
    graphFields: {
        idField: string;
        type: 'Vertex' | 'Edge';
        sourceField?: string;
        targetField?: string;
        nodeLabelField?: string;
        edgeLabelField?: string;
    };
}
export interface ParsedFile {
    id: string;
    meta: IMeta;
    contents: string;
}
export declare const parseCSV: (file: File) => Promise<ParsedFile>;
/**
 *
 * @param contents
 * @param header
 * @param delimiter
 * @returns
 */
export declare function covertCSV2JSON(contents: string, header: string[], delimiter: string): any;