/**

* -------------------------------------------------------------------------------------------

* Copyright (c) Microsoft Corporation. All Rights Reserved. Licensed under the MIT License.

* See License in the project root for license information.

* -------------------------------------------------------------------------------------------

*/

/**

* @module HTTPClient

*/

import { Context } from "./IContext";

import { Middleware } from "./middleware/IMiddleware";

/**

* @class

* Class representing HTTPClient

*/

export class HTTPClient {

/**

* @private

* A member holding first middleware of the middleware chain

*/

private middleware: Middleware;

/**

* @public

* @constructor

* Creates an instance of a HTTPClient

* @param {Middleware} middleware - The first middleware of the middleware chain

*/

public constructor(middleware: Middleware) {

this.middleware = middleware;

}

/**

* @public

* @async

* To send the request through the middleware chain

* @param {Context} context - The context of a request

* @returns A promise that resolves to the Context

*/

public async sendRequest(context: Context): Promise<Context> {

try {

if (!(context.request instanceof Request) && context.options === undefined) {

const error = new Error();

error.name = "InvalidRequestOptions";

error.message = "Unable to execute the middleware, Please provide valid options for a request";

throw error;

}

await this.middleware.execute(context);

return context;

} catch (error) {

throw error;

}

}

}