import DataSource from "./DataSource";
import LRU from "lru-cache";
import { JsonQLQuery } from "@mwater/jsonql";
import { Row } from "./types";
/** Caching data source for mWater. Requires jQuery. require explicitly: require('@mwater/expressions/lib/MWaterDataSource') */
export default class MWaterDataSource extends DataSource {
    apiUrl: string;
    client: string | null | undefined;
    cacheExpiry: number;
    options: {
        serverCaching?: boolean;
        localCaching?: boolean;
        imageApiUrl?: string;
        source?: string;
    };
    cache?: LRU<string, Row[]>;
    origin: string | undefined;
    /**
     * @param apiUrl
     * @param options serverCaching: allows server to send cached results. default true
     * localCaching allows local MRU cache. default true
     * imageApiUrl: overrides apiUrl for images
     */
    constructor(apiUrl: string, client?: string | null, 
    /**
     * @param options Configuration options
     * @param options.serverCaching Allows server to send cached results. Default true.
     * @param options.localCaching Allows local MRU cache. Default true.
     * @param options.imageApiUrl Overrides apiUrl for images.
     * @param options.origin Origin of usage. e.g. "dashboards:43445364..."
     */
    options?: {
        serverCaching?: boolean;
        localCaching?: boolean;
        imageApiUrl?: string;
        origin?: string;
    });
    performQuery(query: JsonQLQuery): Promise<Row[]>;
    performQuery(query: JsonQLQuery, cb: (error: any, rows: Row[]) => void): void;
    getCacheExpiry(): number;
    clearCache(): void;
    /** Get the url to download an image (by id from an image or imagelist column)
     * Height, if specified, is minimum height needed. May return larger image
     */
    getImageUrl(imageId: string, height?: number): string;
    /** Get the url to upload an image (by id from an image or imagelist column)
      POST to upload
    */
    getImageUploadUrl(imageId: string): string;
    /** Get the url to download a file (by id from a file or filelist column).
     * filename optionally overrides the downloaded filename.
     */
    getFileUrl(fileId: string, filename?: string): string;
    /** Get the url to upload a file (by id from a file or filelist column). POST to upload. */
    getFileUploadUrl(fileId: string): string;
}