/**
 * Manages shared strings in an Excel workbook
 * Handles deduplication and XML generation for the shared strings table
 * Used to optimize file size by storing repeated strings only once
 */
export default class SharedStrings {
    /** Array of unique strings in the workbook */
    private strings;
    /** Map of strings to their indices for quick lookup */
    private stringIndexMap;
    /** Temporary file path for the shared strings XML */
    private file;
    /**
     * Creates a new SharedStrings instance
     * Initializes a temporary file for XML generation
     */
    constructor();
    /**
     * Adds a string to the shared strings table
     * If the string already exists, returns its index
     * If the string is new, adds it and returns the new index
     *
     * @param str - String to add to the shared strings table
     * @returns Index of the string in the shared strings table
     */
    add(str: string): number;
    /**
     * Generates the shared strings XML file
     * Creates an XML file containing all unique strings in the workbook
     * Processes strings in chunks to manage memory usage
     *
     * @returns Promise that resolves to the path of the generated XML file
     */
    generateSharedStringsXML(): Promise<string>;
    /**
     * Gets the total number of unique strings in the table
     * @returns Number of unique strings
     */
    size(): number;
    /**
     * Clears all strings and mappings from memory
     * Should be called when the shared strings table is no longer needed
     */
    destroy(): void;
}