import { Writable, Readable } from 'stream';
import { IUser, ILibraryDetailedDataForClient, IHubInfo, ContentId, IContentMetadata, ContentParameters, ILibraryOverviewForClient, IFileStats, IAjaxResponse } from './types';
import H5PEditor from './H5PEditor';
import AjaxSuccessResponse from './helpers/AjaxSuccessResponse';
/**
 * Each method in this class corresponds to a route that is called by the H5P
 * client. Normally, the implementation must call them and send back the
 * return values as a JSON body in the HTTP response.
 *
 * If something goes wrong, the methods throw H5pErrors, which include HTTP
 * status codes. Send back these status codes in your HTTP response.
 *
 * Remarks:
 * - Most of the route names can be configured in the IH5PConfig object and thus
 *   might have different names in your case!
 * - The GET /content/<contentId>/<file> and GET /temp-files/<file> routes
 *   should support partials for the Interactive Video editor to work. This
 *   means that the response with HTTP 200 must send back the header
 *   'Accept-Ranges: bytes' and must send back status code 206 for partials.
 *   Check out the documentation of the methods `getContentFile` and
 *   `getTemporaryFile` for more details.
 */
export default class H5PAjaxEndpoint {
    private h5pEditor;
    constructor(h5pEditor: H5PEditor);
    private semanticsEnforcer;
    /**
     * This method must be called by the GET route at the Ajax URL, e.g. GET
     * /ajax. This route must be implemented for editor to work.
     * @param action This is the sub action that should be executed. It is part
     * of the query like this: GET /ajax?action=xyz Possible values:
     *   - content-type-cache: Requests information about available content
     *     types from the server. The user parameter must be set, as the
     *     accessible content types and possible actions (update, etc.) can vary
     *     from user to user
     *   - content-hub-metadata-cache: Requests information about the metadata
     *     currently in use by the H5P Content Hub.
     *   - libraries: Requests detailed data about a single library. The
     *     parameters machineName, majorVersion, minorVersion and language must
     *     be set in this case. Queries look like this: GET
     *     /ajax?action=libraries?machineName=<machine_name>&majorVersion=<major_version>&minorVersion=<minor_version>
     * @param machineName (need if action == 'libraries') The machine name of
     * the library about which information is requested, e.g. 'H5P.Example'. It
     * is part of the query, e.g. +machineName=H5P.Example
     * @param majorVersion (need if action == 'libraries') The major version of
     * the library about which information is requested, e.g. '1'.
     * @param minorVersion (need if action == 'libraries') The minor version of
     * the library about which information is requested, e.g. '0'.
     * @param language (can be set if action == 'libraries') The language in
     * which the editor is currently displayed, e.g. 'en'. Will default to
     * English if unset.
     * @param user (needed if action == 'content-type-cache') The user who is
     * displaying the H5P Content Type Hub. It is the job of the implementation
     * to inject this object.
     * @returns an object which must be sent back in the response as JSON with
     * HTTP status code 200
     * @throws H5pErrors with HTTP status codes, which you must catch and then
     * send back in the response
     */
    getAjax: (action: "content-type-cache" | "libraries" | string, machineName?: string, majorVersion?: number | string, minorVersion?: number | string, language?: string, user?: IUser) => Promise<IHubInfo | ILibraryDetailedDataForClient | IAjaxResponse>;
    /**
     * The method must be called by the GET /content/<contentId>/<filename>
     * route.
     * As it is necessary for the method to know about a possible range start
     * and end, you need to pass in a callback function that returns the range
     * specified in the http request. The start and end of the range cannot be
     * passed to this method directly, as you need to know the file size to
     * calculate the correct range. That's why we use the callback.
     *
     * Note: You can also use a status route to serve content files, but then
     * you lose the rights and permission check.
     *
     * @param contentId the contentId of the resource
     * @param filename the filename of the resource
     * @param user the user who is requesting the resource
     * @param getRangeCallback a function that can be called to retrieve the
     * start and end of a range; if the request doesn't specify a range, simply
     * return undefined; if you do not specify getRangeCallback, the method
     * will simply always use the whole file.
     * @returns mimetype: the mimetype of the file, the range (undefined if
     * unused), stats about the file and a readable. Do this with the response:
     * - Pipe back the readable as the response with status code 200.
     * - Set this HTTP header in the response: "Content-Type: <mimetype>"
     * - If range is undefined:
     *    - Return status code 200
     *    - Set this HTTP header in the response: 'Accept-Ranges: bytes'
     * - If range is defined:
     *    - Return status code 206
     *    - Set these HTTP headers in the response: 'Content-Length: <end - start + 1>'
     *                                              'Content-Range': `bytes <start-end>/<totalLength>`
     * **IMPORTANT:** You must subscribe to the error event of the readable and
     * send back a 404 status code if an error occurs. This is necessary as the
     * AWS S3 library doesn't throw proper 404 errors.
     * @throws H5pErrors with HTTP status codes, which you must catch and then
     * send back in the response
     */
    getContentFile: (contentId: ContentId, filename: string, user: IUser, getRangeCallback?: (fileSize: number) => {
        end: number;
        start: number;
    } | undefined) => Promise<{
        mimetype: string;
        range: {
            end: number;
            start: number;
        };
        stats: IFileStats;
        stream: Readable;
    }>;
    /**
     * This method must be called when the editor requests the parameters
     * (= content.json) of a piece of content, which is done with
     * GET /params/<contentId>
     * This route must be implemented for the editor to work.
     * @param contentId the content id of the piece of content; it is part of
     * the requests URL (see above)
     * @param user the user who is using the editor. It is the job of the
     * implementation to inject this object.
     * @returns an object which must be sent back in the response as JSON with
     * HTTP status code 200
     * @throws H5pErrors with HTTP status codes, which you must catch and then
     * send back in the response
     */
    getContentParameters: (contentId: ContentId, user: IUser) => Promise<{
        h5p: IContentMetadata;
        library: string;
        params: {
            metadata: IContentMetadata;
            params: ContentParameters;
        };
    }>;
    /**
     * This method must be called when the user downloads a H5P package (the
     * .h5p file containing all libraries and content files). The route is
     * GET /download/<contentId>
     * @param contentId the id of the content object. It is part of the request
     * URL (see above).
     * @param user the user who wants to download the package. It is the job of
     * the implementation to inject this object.
     * @param outputWritable a Writable to which the file contents are piped.
     * @returns no return value; the result is directly piped to the Writable,
     * which is the Response object in Express, for instance. Note that you must
     * set the HTTP Header 'Content-disposition: attachment; filename=xyz.h5p'
     * in your response!
     * @throws H5pErrors with HTTP status codes, which you must catch and then
     * send back in the response
     */
    getDownload: (contentId: ContentId, user: IUser, outputWritable: Writable) => Promise<void>;
    /**
     * This method must be called when the client requests a library file with
     * GET /libraries/<uberName>/<filename>.
     *
     * Note: You can also use a static route to serve library files.
     *
     * @param ubername the ubername of the library (e.g. H5P.Example-1.0). This
     * is the first component of the path after /libraries/
     * @param filename the filename of the requested file, e.g. xyz.js. This is the
     * rest of the path after the uberName.
     * @returns all the values that must be send back with HTTP status code 200.
     * You should send back:
     *   - status code 200
     *   - the mimetype
     *   - the file size (in stats)
     * @throws H5pErrors with HTTP status codes, which you must catch and then
     * send back in the response
     */
    getLibraryFile: (ubername: string, filename: string) => Promise<{
        mimetype: string;
        stats: IFileStats;
        stream: Readable;
    }>;
    /**
     * The method must be called by the GET /temp-files/<filename> route.
     * As it is necessary for the method to know about a possible range start
     * and end, you need to pass in a callback function that returns the range
     * specified in the http request. The start and end of the range cannot be
     * passed to this method directly, as you need to know the file size to
     * calculate the correct range. That's why we use the callback.
     * @param filename the filename of the resource
     * @param user the user who is requesting the resource
     * @param getRangeCallback a function that can be called to retrieve the
     * start and end of a range; if the request doesn't specify a range, simply
     * return undefined; if you do not specify getRangeCallback, the method
     * will simply always use the whole file.
     * @returns mimetype: the mimetype of the file, the range (undefined if
     * unused), stats about the file and a readable. Do this with the response:
     * - Pipe back the readable as the response with status code 200.
     * - Set this HTTP header in the response: "Content-Type: <mimetype>"
     * - If range is undefined:
     *    - Return status code 200
     *    - Set this HTTP header in the response: 'Accept-Ranges': 'bytes'
     * - If range is defined:
     *    - Return status code 206
     *    - Set these HTTP headers in the response: 'Content-Length: <end - start + 1>'
     *                                              'Content-Range': `bytes <start-end>/<totalLength>`
     * **IMPORTANT:** You must subscribe to the error event of the readable and
     * send back a 404 status code if an error occurs. This is necessary as the
     * AWS S3 library doesn't throw proper 404 errors.
     * @throws H5pErrors with HTTP status codes, which you must catch and then
     * send back in the response
     */
    getTemporaryFile: (filename: string, user: IUser, getRangeCallback?: (fileSize: number) => {
        end: number;
        start: number;
    }) => Promise<{
        mimetype: string;
        range: {
            end: number;
            start: number;
        };
        stats: IFileStats;
        stream: Readable;
    }>;
    /**
     * Implements the POST /ajax route. Performs various actions. Don't be
     * confused by the fact that many of the requests dealt with here are not
     * really POST requests, but look more like GET requests. This is simply how
     * the H5P client works and we can't change it.
     * @param action This is the sub action that should be executed. It is part
     * of the query like this: POST /ajax?action=xyz Possible values:
     *   - libraries:       returns basic information about a list of libraries
     *   - translations:    returns translation data about a list of libraries
     *                      in a specific language
     *   - files:           uploads a resource file (image, video, ...) into
     *                      temporary storage
     *   - filter:          cleans the parameters passed to it to avoid XSS
     *                      attacks and schema violations (currently only
     *                      implemented as a stub)
     *   - library-install: downloads an installs content types from the H5P Hub
     *   - library-upload:  uploads a h5p package from the user's computer and
     *                      installs the libraries in it; returns the parameters
     *                      and metadata in it
     * @param body the parsed JSON content of the request body
     * @param language (needed for 'translations' and optionally possible for
     * 'libraries') the language code for which the translations should be
     * retrieved, e.g. 'en'. This paramter is part of the query URL, e.g. POST
     * /ajax?action=translations&language=en
     * @param user (needed for 'files', 'library-install' and 'get-content') the
     * user who is performing the action. It is the job of the implementation to
     * inject this object.
     * @param filesFile (needed for 'files') the file uploaded to the server;
     * this file is part of the HTTP request and has the name 'file'.
     * @param id (needed for 'library-install') the machine name of the library
     * to  install. The id is part of the query URL, e.g. POST
     * /ajax?action=library-install&id=H5P.Example
     * @param translate (needed for 'library-install' and 'library-upload') a
     * translation function used to localize messages
     * @param filesFile (needed for 'library-upload') the file uploaded to the
     * server; this file is part of the HTTP request and has the name 'h5p'.
     * @param hubId (need for 'get-content') the id of a content object on the
     * H5P Content Hub
     * @returns an object which must be sent back in the response as JSON with
     * HTTP status code 200
     * @throws H5pErrors with HTTP status codes, which you must catch and then
     * send back in the response
     */
    postAjax: (action: "libraries" | "translations" | "files" | "filter" | "library-install" | "library-upload" | "content-hub-metadata-cache" | "get-content" | string, body?: {
        libraries: string[];
    } | {
        contentId: string;
        field: string;
    } | {
        libraryParameters: string;
    }, language?: string, user?: IUser, filesFile?: {
        data?: Buffer;
        mimetype: string;
        name: string;
        size: number;
        tempFilePath?: string;
    }, id?: string, translate?: (stringId: string, replacements: {
        [key: string]: any;
    }) => string, libraryUploadFile?: {
        data?: Buffer;
        mimetype: string;
        name: string;
        size: number;
        tempFilePath?: string;
    }, hubId?: string) => Promise<AjaxSuccessResponse | {
        height?: number;
        mime: string;
        path: string;
        width?: number;
    } | ILibraryOverviewForClient[]>;
}