Remove unused class

I managed to lose this deletion in a merge.

src/browser/socket.ts

@@ -1,204 +0,0 @@
-import { field, logger, Logger } from "@coder/logger"
-import { Emitter } from "../common/emitter"
-import { generateUuid } from "../common/util"
-
-const decoder = new TextDecoder("utf8")
-export const decode = (buffer: string | ArrayBuffer): string => {
-  return typeof buffer !== "string" ? decoder.decode(buffer) : buffer
-}
-
-/**
- * A web socket that reconnects itself when it closes. Sending messages while
- * disconnected will throw an error.
- */
-export class ReconnectingSocket {
-  protected readonly _onMessage = new Emitter<string | ArrayBuffer>()
-  public readonly onMessage = this._onMessage.event
-  protected readonly _onDisconnect = new Emitter<number | undefined>()
-  public readonly onDisconnect = this._onDisconnect.event
-  protected readonly _onClose = new Emitter<number | undefined>()
-  public readonly onClose = this._onClose.event
-  protected readonly _onConnect = new Emitter<void>()
-  public readonly onConnect = this._onConnect.event
-
-  // This helps distinguish messages between sockets.
-  private readonly logger: Logger
-
-  private socket?: WebSocket
-  private connecting?: Promise<void>
-  private closed = false
-  private readonly openTimeout = 10000
-
-  // Every time the socket fails to connect, the retry will be increasingly
-  // delayed up to a maximum.
-  private readonly retryBaseDelay = 1000
-  private readonly retryMaxDelay = 10000
-  private retryDelay?: number
-  private readonly retryDelayFactor = 1.5
-
-  // The socket must be connected for this amount of time before resetting the
-  // retry delay. This prevents rapid retries when the socket does connect but
-  // is closed shortly after.
-  private resetRetryTimeout?: NodeJS.Timeout
-  private readonly resetRetryDelay = 10000
-
-  private _binaryType: typeof WebSocket.prototype.binaryType = "arraybuffer"
-
-  public constructor(private path: string, public readonly id: string = generateUuid(4)) {
-    // On Firefox the socket seems to somehow persist a page reload so the close
-    // event runs and we see "attempting to reconnect".
-    if (typeof window !== "undefined") {
-      window.addEventListener("beforeunload", () => this.close())
-    }
-    this.logger = logger.named(this.id)
-  }
-
-  public set binaryType(b: typeof WebSocket.prototype.binaryType) {
-    this._binaryType = b
-    if (this.socket) {
-      this.socket.binaryType = b
-    }
-  }
-
-  /**
-   * Permanently close the connection. Will not attempt to reconnect. Will
-   * remove event listeners.
-   */
-  public close(code?: number): void {
-    if (this.closed) {
-      return
-    }
-
-    if (code) {
-      this.logger.info(`closing with code ${code}`)
-    }
-
-    if (this.resetRetryTimeout) {
-      clearTimeout(this.resetRetryTimeout)
-    }
-
-    this.closed = true
-
-    if (this.socket) {
-      this.socket.close()
-    } else {
-      this._onClose.emit(code)
-    }
-  }
-
-  public dispose(): void {
-    this._onMessage.dispose()
-    this._onDisconnect.dispose()
-    this._onClose.dispose()
-    this._onConnect.dispose()
-    this.logger.debug("disposed handlers")
-  }
-
-  /**
-   * Send a message on the socket. Logs an error if currently disconnected.
-   */
-  public send(message: string | ArrayBuffer): void {
-    this.logger.trace(() => ["sending message", field("message", decode(message))])
-    if (!this.socket) {
-      return logger.error("tried to send message on closed socket")
-    }
-    this.socket.send(message)
-  }
-
-  /**
-   * Connect to the socket. Can also be called to wait until the connection is
-   * established in the case of disconnections. Multiple calls will be handled
-   * correctly.
-   */
-  public async connect(): Promise<void> {
-    if (!this.connecting) {
-      this.connecting = new Promise((resolve, reject) => {
-        const tryConnect = (): void => {
-          if (this.closed) {
-            return reject(new Error("disconnected")) // Don't keep trying if we've closed permanently.
-          }
-          if (typeof this.retryDelay === "undefined") {
-            this.retryDelay = 0
-          } else {
-            this.retryDelay = this.retryDelay * this.retryDelayFactor || this.retryBaseDelay
-            if (this.retryDelay > this.retryMaxDelay) {
-              this.retryDelay = this.retryMaxDelay
-            }
-          }
-          this._connect()
-            .then((socket) => {
-              this.logger.info("connected")
-              this.socket = socket
-              this.socket.binaryType = this._binaryType
-              if (this.resetRetryTimeout) {
-                clearTimeout(this.resetRetryTimeout)
-              }
-              this.resetRetryTimeout = setTimeout(() => (this.retryDelay = undefined), this.resetRetryDelay)
-              this.connecting = undefined
-              this._onConnect.emit()
-              resolve()
-            })
-            .catch((error) => {
-              this.logger.error(`failed to connect: ${error.message}`)
-              tryConnect()
-            })
-        }
-        tryConnect()
-      })
-    }
-    return this.connecting
-  }
-
-  private async _connect(): Promise<WebSocket> {
-    const socket = await new Promise<WebSocket>((resolve, _reject) => {
-      if (this.retryDelay) {
-        this.logger.info(`retrying in ${this.retryDelay}ms...`)
-      }
-      setTimeout(() => {
-        this.logger.info("connecting...", field("path", this.path))
-        const socket = new WebSocket(this.path)
-
-        const reject = (): void => {
-          _reject(new Error("socket closed"))
-        }
-
-        const timeout = setTimeout(() => {
-          // eslint-disable-next-line @typescript-eslint/no-use-before-define
-          socket.removeEventListener("open", open)
-          socket.removeEventListener("close", reject)
-          _reject(new Error("timeout"))
-        }, this.openTimeout)
-
-        const open = (): void => {
-          clearTimeout(timeout)
-          socket.removeEventListener("close", reject)
-          resolve(socket)
-        }
-
-        socket.addEventListener("open", open)
-        socket.addEventListener("close", reject)
-      }, this.retryDelay)
-    })
-
-    socket.addEventListener("message", (event) => {
-      this.logger.trace(() => ["got message", field("message", decode(event.data))])
-      this._onMessage.emit(event.data)
-    })
-    socket.addEventListener("close", (event) => {
-      this.socket = undefined
-      if (!this.closed) {
-        this._onDisconnect.emit(event.code)
-        // It might be closed in the event handler.
-        if (!this.closed) {
-          this.logger.info("connection closed; attempting to reconnect")
-          this.connect()
-        }
-      } else {
-        this._onClose.emit(event.code)
-        this.logger.info("connection closed permanently")
-      }
-    })
-
-    return socket
-  }
-}