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// Copyright 2018-2019 the oak authors. All rights reserved. MIT license.
import { Application } from "./application.ts";import { ServerRequest } from "./deps.ts";import { createHttpError } from "./httpError.ts";import { Request } from "./request.ts";import { Response } from "./response.ts";import { ErrorStatus } from "./types.ts";
export class Context<S extends object = { [key: string]: any }> {  /** A reference to the current application */  app: Application<any>;
  /** The request object */  request: Request;
  /** The response object */  response = new Response();
  /** The object to pass state to front-end views.  This can be typed by   * supplying the generic state argument when creating a new app.  For   * example:   *   *       const app = new Application<{ foo: string }>();   *   */  state: S;
  constructor(app: Application<S>, serverRequest: ServerRequest) {    this.app = app;    this.state = app.state;    this.request = new Request(serverRequest);  }
  /** Create and throw an HTTP Error, which can be used to pass status   * information which can be caught by other middleware to send more   * meaningful error messages back to the client.   */  throw(errorStatus: ErrorStatus, message?: string, props?: object): never {    const err = createHttpError(errorStatus, message);    if (props) {      Object.assign(err, props);    }    throw err;  }}