import type Slugger from 'github-slugger';
import type { Lexer, Tokens, TokensList } from 'marked';
/**
 * A markdown header
 */
export type MarkdownHeader = {
    id: string;
    depth: number;
    text: string;
};
export declare enum IndexableMarkdownType {
    SECTION = "section",
    HEADER = "header"
}
/**
 * A section of text that is indexed. This is everything that is found under a title or that has no title at all.
 */
export type IndexableMarkdownSection = {
    type: IndexableMarkdownType.SECTION;
    /***
     * The header list leading to this markdown section. They will be in order of depth.
     */
    headers: MarkdownHeader[];
    /**
     * The content used for the full text search in this section.
     */
    content: string;
};
/**
 * A markdown header that is indexed. Headers receive a higher scoring than sections.
 */
export type IndexableMarkdownHeader = {
    type: IndexableMarkdownType.HEADER;
    /**
     * The path that leads to this header.
     */
    path: MarkdownHeader[];
    /**
     * The title of this header.
     */
    title: string;
};
export type IndexableMarkdownPart = IndexableMarkdownSection | IndexableMarkdownHeader;
export type TextExtractor = (token: Tokens.Generic, extract: ExtractFunction) => string;
export type ExtractFunction = (tokens: Tokens.Generic[]) => string;
export type TextExtractors = Record<string, TextExtractor>;
export type Options = {
    slugger: Slugger;
    lexer: Lexer;
    extractors: TextExtractors;
};
export declare function extract(source: string, options: Options): IndexableMarkdownPart[];
export declare function extractTokens(tokens: TokensList, options: Options): IndexableMarkdownPart[];
export declare function extractFunction(extractors: TextExtractors): ExtractFunction;