/**
 * @packageDocumentation
 *
 * This module provides utility functions for processing and managing YAML front matter in Obsidian notes.
 */
import type { GenericObject } from '../ObjectUtils.cjs';
/**
 * A combined front matter of a document.
 * It is a union of custom front matter, Obsidian front matter, and additional properties.
 *
 * @typeParam CustomFrontmatter - The type of custom front matter.
 */
export type CombinedFrontmatter<CustomFrontmatter> = CustomFrontmatter & GenericObject & ObsidianFrontmatter;
/**
 * A front matter of an Obsidian file.
 *
 * @see {@link https://help.obsidian.md/Editing+and+formatting/Properties#Default+properties}
 */
export interface ObsidianFrontmatter {
    /**
     * An array of aliases for the note.
     */
    aliases?: string[];
    /**
     * An array of CSS classes to apply to the note.
     */
    cssclasses?: string[];
    /**
     * An array of tags for the note.
     */
    tags?: string[];
}
/**
 * A front matter for publishing in Obsidian.
 *
 * @see {@link https://help.obsidian.md/Editing+and+formatting/Properties#Properties+for+Obsidian+Publish}
 */
export interface ObsidianPublishFrontmatter {
    /**
     * A cover image for the note.
     */
    cover?: string;
    /**
     * A description for the note.
     */
    description?: string;
    /**
     * An image for the note.
     */
    image?: string;
    /**
     * A permanent link for the note.
     */
    permalink?: string;
    /**
     * Whether the note is published.
     */
    publish?: boolean;
}
/**
 * Parses the front matter of a given content string.
 *
 * @param content - The content string to parse.
 * @returns The parsed front matter.
 */
export declare function parseFrontmatter<CustomFrontmatter = unknown>(content: string): CombinedFrontmatter<CustomFrontmatter>;
/**
 * Sets the front matter of a given content string.
 *
 * @param content - The content string to set the front matter in.
 * @param newFrontmatter - The new front matter to set.
 * @returns The new content string with the front matter set.
 */
export declare function setFrontmatter(content: string, newFrontmatter: object): string;