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All rights reserved.\r\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\r\n\r\nimport { ILogger, LogLevel } from \"./ILogger\";\r\nimport { ITransport, TransferFormat } from \"./ITransport\";\r\nimport { Arg, getDataDetail } from \"./Utils\";\r\n\r\n/** @private */\r\nexport class WebSocketTransport implements ITransport {\r\n    private readonly logger: ILogger;\r\n    private readonly accessTokenFactory: () => string | Promise<string>;\r\n    private readonly logMessageContent: boolean;\r\n    private webSocket: WebSocket;\r\n\r\n    constructor(accessTokenFactory: () => string | Promise<string>, logger: ILogger, logMessageContent: boolean) {\r\n        this.logger = logger;\r\n        this.accessTokenFactory = accessTokenFactory || (() => null);\r\n        this.logMessageContent = logMessageContent;\r\n    }\r\n\r\n    public async connect(url: string, transferFormat: TransferFormat): Promise<void> {\r\n        Arg.isRequired(url, \"url\");\r\n        Arg.isRequired(transferFormat, \"transferFormat\");\r\n        Arg.isIn(transferFormat, TransferFormat, \"transferFormat\");\r\n\r\n        if (typeof (WebSocket) === \"undefined\") {\r\n            throw new Error(\"'WebSocket' is not supported in your environment.\");\r\n        }\r\n\r\n        this.logger.log(LogLevel.Trace, \"(WebSockets transport) Connecting\");\r\n\r\n        const token = await this.accessTokenFactory();\r\n        if (token) {\r\n            url += (url.indexOf(\"?\") < 0 ? \"?\" : \"&\") + `access_token=${encodeURIComponent(token)}`;\r\n        }\r\n\r\n        return new Promise<void>((resolve, reject) => {\r\n            url = url.replace(/^http/, \"ws\");\r\n            const webSocket = new WebSocket(url);\r\n            if (transferFormat === TransferFormat.Binary) {\r\n                webSocket.binaryType = \"arraybuffer\";\r\n            }\r\n\r\n            // tslint:disable-next-line:variable-name\r\n            webSocket.onopen = (_event: Event) => {\r\n                this.logger.log(LogLevel.Information, `WebSocket connected to ${url}`);\r\n                this.webSocket = webSocket;\r\n                resolve();\r\n            };\r\n\r\n            webSocket.onerror = (event: ErrorEvent) => {\r\n                reject(event.error);\r\n            };\r\n\r\n            webSocket.onmessage = (message: MessageEvent) => {\r\n                this.logger.log(LogLevel.Trace, `(WebSockets transport) data received. ${getDataDetail(message.data, this.logMessageContent)}.`);\r\n                if (this.onreceive) {\r\n                    this.onreceive(message.data);\r\n                }\r\n            };\r\n\r\n            webSocket.onclose = (event: CloseEvent) => {\r\n                // webSocket will be null if the transport did not start successfully\r\n                this.logger.log(LogLevel.Trace, \"(WebSockets transport) socket closed.\");\r\n                if (this.onclose) {\r\n                    if (event.wasClean === false || event.code !== 1000) {\r\n                        this.onclose(new Error(`Websocket closed with status code: ${event.code} (${event.reason})`));\r\n                    } else {\r\n                        this.onclose();\r\n                    }\r\n                }\r\n            };\r\n        });\r\n    }\r\n\r\n    public send(data: any): Promise<void> {\r\n        if (this.webSocket && this.webSocket.readyState === WebSocket.OPEN) {\r\n            this.logger.log(LogLevel.Trace, `(WebSockets transport) sending data. ${getDataDetail(data, this.logMessageContent)}.`);\r\n            this.webSocket.send(data);\r\n            return Promise.resolve();\r\n        }\r\n\r\n        return Promise.reject(\"WebSocket is not in the OPEN state\");\r\n    }\r\n\r\n    public stop(): Promise<void> {\r\n        if (this.webSocket) {\r\n            this.webSocket.close();\r\n            this.webSocket = null;\r\n        }\r\n        return Promise.resolve();\r\n    }\r\n\r\n    public onreceive: (data: string | ArrayBuffer) => void;\r\n    public onclose: (error?: Error) => void;\r\n}\r\n"]}