import type { IconifyInfo } from '@iconify/types';
import type { CollectionInfo, LegacyIconifyInfo } from './info';
/**
 * List of collections, sorted by category and by prefix
 */
export declare type VisibleCollectionsList = Record<string, Record<string, CollectionInfo>>;
export declare type HiddenCollectionsList = Record<string, CollectionInfo>;
export interface ExtendedCollectionsList {
    visible: VisibleCollectionsList;
    hidden: HiddenCollectionsList;
}
/**
 * Callback for filtering collections list
 */
export interface CollectionsListFilterCallback {
    (item: CollectionInfo, category: string, prefix: string): boolean;
}
/**
 * Interface for data provided by API
 */
export declare type CollectionsListRawData = Record<string, Partial<IconifyInfo> | LegacyIconifyInfo>;
/**
 * Convert data from API to CollectionsList
 */
export declare function dataToCollections(data: CollectionsListRawData): ExtendedCollectionsList;
/**
 * Get collection prefixes from converted collections list
 */
export declare function collectionsPrefixes(collections: ExtendedCollectionsList): string[];
/**
 * Filter collections
 */
export declare function filterCollections(collections: ExtendedCollectionsList, callback: CollectionsListFilterCallback, keepEmptyCategories?: boolean): ExtendedCollectionsList;
/**
 * Add indexes to all collections
 */
export declare function autoIndexCollections(collections: ExtendedCollectionsList, start?: number): void;
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