import type { Session } from './index.js';
import type { Attributions, Encoding, LayerDefinition, LayersMetaData, Projection, Scheme, SourceMetadata, SourceType } from 'style/style.spec.js';
import type { SourceFlushMessage, TileRequest } from '../worker.spec.js';
/**
 * # Generic Data Source Container
 *
 * This class is wrapped by many other source types. It serves to handle all the generic cases
 * of data sources like fetching metadata, handling flushes, and so on.
 */
export default class Source {
    #private;
    active: boolean;
    /** Resolver letting us know when the source is built */
    resolve: (value: void | PromiseLike<void>) => void;
    ready: Promise<void>;
    name: string;
    path: string;
    type: SourceType;
    extension: string;
    encoding: Encoding;
    scheme: Scheme;
    projection: Projection;
    isTimeFormat: boolean;
    attributions: Attributions;
    styleLayers: LayerDefinition[];
    layers?: LayersMetaData;
    minzoom: number;
    maxzoom: number;
    size: number;
    faces: Set<number>;
    needsToken: boolean;
    time?: number;
    session: Session;
    textEncoder: TextEncoder;
    /**
     * @param name - name of the source
     * @param projection - the projection used
     * @param layers - the style layers that are associated with this source
     * @param path - the path to the source to fetch data
     * @param needsToken - flag indicating if the source requires a token in the fetch
     * @param session - the session that works with the token to make valid fetch requests on source data behind an API
     */
    constructor(name: string, projection: Projection, layers: LayerDefinition[], path: string, needsToken: boolean | undefined, session: Session);
    /**
     * If this function runs, we assume a default quad-tree tile source
     * @param mapID - the id of the map that is requesting data
     * @param metadata - the metadata for the source
     */
    build(mapID: string, metadata?: SourceMetadata): Promise<void>;
    /**
     * Internal tool to builds the metadata for the source
     * @param metadata - the source metadata
     * @param mapID - the id of the map that we will be shipping the render data to
     */
    _buildMetadata(metadata: SourceMetadata, mapID: string): void;
    /**
     * All tile requests undergo a basic check on whether that data exists
     * within the metadata boundaries. layerIndexes exists to set a boundary
     * of what layers the map is interested in (caused by style change add/edit layer)
     * @param mapID - the id of the map
     * @param tile - the tile
     * @param flushMessage - the flush message
     */
    tileRequest(mapID: string, tile: TileRequest, flushMessage: SourceFlushMessage): Promise<void>;
    /**
     * If this function runs, we assume default quad-tree tile source.
     * In the default case, we want the worker to process the data
     * @param mapID - the id of the map to ship the eventual render data back to
     * @param tile - the tile request
     * @param sourceName - the source name the data to belongs to
     */
    _tileRequest(mapID: string, tile: TileRequest, sourceName: string): Promise<void>;
    /**
     * If no data, we still have to let the tile worker know so it can prepare a proper flush
     * as well as manage cases like "invert" type data.
     * @param mapID - the id of the map
     * @param tile - the tile request
     * @param sourceName - the source name the data to belongs to
     */
    _flush(mapID: string, tile: TileRequest, sourceName: string): void;
    /**
     * Fetch a tile
     * @param path - the base path to the tile data
     * @param mapID - the id of the map
     * @param json - flag indicating if the data is json
     * @returns the raw data or JSON metadata if found
     */
    _fetch<T>(path: string, mapID: string, json?: boolean): Promise<T | undefined>;
}