refactor: migrate to TypeScript

2026-04-30 03:00:39 -04:00 · 2020-09-23 23:27:16 +02:00
parent 130f28a43c
commit b52b4ef49e
7 changed files with 80 additions and 533 deletions
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,4 +0,0 @@
-{
-  "extends": "prettier",
-  "parser": "babel-eslint"
-}
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules
 .nyc_output/
+dist/
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -1,28 +1,45 @@
-const EventEmitter = require("events");
+import { EventEmitter } from "events";
+
+export type SocketId = string;
+export type Room = string;
+
+export interface BroadcastFlags {
+  volatile?: boolean;
+  compress?: boolean;
+  local?: boolean;
+  broadcast?: boolean;
+  binary?: boolean;
+}
+
+export interface BroadcastOptions {
+  rooms: Set<Room>;
+  except?: Set<SocketId>;
+  flags?: BroadcastFlags;
+}
+
+export class Adapter extends EventEmitter {
+  protected rooms: Map<Room, Set<SocketId>> = new Map();
+  protected sids: Map<SocketId, Set<Room>> = new Map();
+  private readonly encoder;

-class Adapter extends EventEmitter {
  /**
   * In-memory adapter constructor.
   *
   * @param {Namespace} nsp
-   * @public
   */
-  constructor(nsp) {
+  constructor(readonly nsp: any) {
    super();
-    this.nsp = nsp;
-    this.rooms = new Map(); // Map<Room, Set<SocketId>>
-    this.sids = new Map(); // Map<SocketId, Set<Room>>
    this.encoder = nsp.server.encoder;
  }

  /**
   * Adds a socket to a list of room.
   *
-   * @param {string}      id      the socket id
-   * @param {Set<string>} rooms   a set of rooms
+   * @param {SocketId}  id      the socket id
+   * @param {Set<Room>} rooms   a set of rooms
   * @public
   */
-  addAll(id, rooms) {
+  public addAll(id: SocketId, rooms: Set<Room>): void {
    for (const room of rooms) {
      if (!this.sids.has(id)) {
        this.sids.set(id, new Set());
@@ -39,11 +56,10 @@ class Adapter extends EventEmitter {
  /**
   * Removes a socket from a room.
   *
-   * @param {string} id     the socket id
-   * @param {string} room   the room name
-   * @public
+   * @param {SocketId} id     the socket id
+   * @param {Room}     room   the room name
   */
-  del(id, room) {
+  public del(id: SocketId, room: Room): void {
    if (this.sids.has(id)) {
      this.sids.get(id).delete(room);
    }
@@ -57,10 +73,9 @@ class Adapter extends EventEmitter {
  /**
   * Removes a socket from all rooms it's joined.
   *
-   * @param {string} id   the socket id
-   * @public
+   * @param {SocketId} id   the socket id
   */
-  delAll(id) {
+  public delAll(id: SocketId): void {
    if (!this.sids.has(id)) {
      return;
    }
@@ -87,9 +102,9 @@ class Adapter extends EventEmitter {
   * @param {Object} opts     the options
   * @public
   */
-  broadcast(packet, opts) {
+  public broadcast(packet: any, opts: BroadcastOptions): void {
    const rooms = opts.rooms;
-    const except = opts.except || [];
+    const except = opts.except || new Set();
    const flags = opts.flags || {};
    const packetOpts = {
      preEncoded: true,
@@ -105,7 +120,7 @@ class Adapter extends EventEmitter {
          if (!this.rooms.has(room)) continue;

          for (const id of this.rooms.get(room)) {
-            if (ids.has(id) || ~except.indexOf(id)) continue;
+            if (ids.has(id) || except.has(id)) continue;
            const socket = this.nsp.connected.get(id);
            if (socket) {
              socket.packet(encodedPackets, packetOpts);
@@ -115,7 +130,7 @@ class Adapter extends EventEmitter {
        }
      } else {
        for (const [id] of this.sids) {
-          if (~except.indexOf(id)) continue;
+          if (except.has(id)) continue;
          const socket = this.nsp.connected.get(id);
          if (socket) socket.packet(encodedPackets, packetOpts);
        }
@@ -126,11 +141,10 @@ class Adapter extends EventEmitter {
  /**
   * Gets a list of sockets by sid.
   *
-   * @param {Set<string>} rooms   the explicit set of rooms to check.
-   * @public
+   * @param {Set<Room>} rooms   the explicit set of rooms to check.
   */
-  sockets(rooms) {
-    const sids = new Set();
+  public sockets(rooms: Set<Room>): Promise<Set<SocketId>> {
+    const sids = new Set<SocketId>();

    if (rooms.size) {
      for (const room of rooms) {
@@ -148,18 +162,15 @@ class Adapter extends EventEmitter {
      }
    }

-    return sids;
+    return Promise.resolve(sids);
  }

  /**
   * Gets the list of rooms a given socket has joined.
   *
-   * @param {String} id   the socket id
-   * @public
+   * @param {SocketId} id   the socket id
   */
-  socketRooms(id) {
+  public socketRooms(id: SocketId): Set<Room> | undefined {
    return this.sids.get(id);
  }
 }
-
-module.exports = Adapter;
--- a/package-lock.json
+++ b/package-lock.json
@@ -243,24 +243,6 @@
        "to-fast-properties": "^2.0.0"
      }
    },
-    "@eslint/eslintrc": {
-      "version": "0.1.3",
-      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.1.3.tgz",
-      "integrity": "sha512-4YVwPkANLeNtRjMekzux1ci8hIaH5eGKktGqR0d3LWsKNn5B2X/1Z6Trxy7jQXl9EBGE6Yj02O+t09FMeRllaA==",
-      "dev": true,
-      "requires": {
-        "ajv": "^6.12.4",
-        "debug": "^4.1.1",
-        "espree": "^7.3.0",
-        "globals": "^12.1.0",
-        "ignore": "^4.0.6",
-        "import-fresh": "^3.2.1",
-        "js-yaml": "^3.13.1",
-        "lodash": "^4.17.19",
-        "minimatch": "^3.0.4",
-        "strip-json-comments": "^3.1.1"
-      }
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    "@istanbuljs/load-nyc-config": {
      "version": "1.1.0",
      "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz",
@@ -331,16 +313,10 @@
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      "dev": true
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-    "acorn": {
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-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.0.tgz",
-      "integrity": "sha512-+G7P8jJmCHr+S+cLfQxygbWhXy+8YTVGzAkpEbcLo2mLoL7tij/VG41QSHACSf5QgYRhMZYHuNc6drJaO0Da+w==",
-      "dev": true
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-    "acorn-jsx": {
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-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.3.1.tgz",
-      "integrity": "sha512-K0Ptm/47OKfQRpNQ2J/oIN/3QYiK6FwW+eJbILhsdxh2WTLdl+30o8aGdTbm5JbffpFFAg/g+zi1E+jvJha5ng==",
+    "@types/node": {
+      "version": "14.11.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.11.2.tgz",
+      "integrity": "sha512-jiE3QIxJ8JLNcb1Ps6rDbysDhN4xa8DJJvuC9prr6w+1tIh+QAbYyNF3tyiZNLDBIuBCf4KEcV2UvQm/V60xfA==",
      "dev": true
    },
    "aggregate-error": {
@@ -353,18 +329,6 @@
        "indent-string": "^4.0.0"
      }
    },
-    "ajv": {
-      "version": "6.12.5",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.5.tgz",
-      "integrity": "sha512-lRF8RORchjpKG50/WFf8xmg7sgCLFiYNNnqdKflk63whMQcWR5ngGjiSXkL9bjxy6B2npOK2HSMN49jEBMSkag==",
-      "dev": true,
-      "requires": {
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@@ -432,26 +396,6 @@
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-      "dev": true
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@@ -501,12 +445,6 @@
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@@ -685,12 +623,6 @@
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@@ -715,30 +647,12 @@
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      "version": "3.0.3",
      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
--- a/package.json
+++ b/package.json
@@ -6,20 +6,23 @@
    "type": "git",
    "url": "git://github.com/socketio/socket.io-adapter.git"
  },
+  "files": [
+    "dist/"
+  ],
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
  "description": "default socket.io in-memory adapter",
  "devDependencies": {
-    "babel-eslint": "^10.1.0",
-    "eslint": "^7.9.0",
-    "eslint-config-prettier": "^6.11.0",
+    "@types/node": "^14.11.2",
    "expect.js": "^0.3.1",
    "mocha": "^8.1.3",
    "nyc": "^15.1.0",
-    "prettier": "^1.19.1"
+    "prettier": "^1.19.1",
+    "typescript": "^4.0.3"
  },
  "scripts": {
-    "lint": "eslint index.js",
-    "test": "npm run lint && npm run format:check && nyc mocha test/index.js",
-    "format:check": "prettier --check index.js 'test/**/*.js'",
-    "format:fix": "prettier --write index.js 'test/**/*.js'"
+    "test": "npm run format:check && tsc && nyc mocha test/index.js",
+    "format:check": "prettier --parser typescript --check 'lib/**/*.ts' 'test/**/*.js'",
+    "format:fix": "prettier --parser typescript --write 'lib/**/*.ts' 'test/**/*.js'"
  }
 }
--- a/test/index.js
+++ b/test/index.js
@@ -1,4 +1,4 @@
-const Adapter = require("..");
+const { Adapter } = require("..");
 const expect = require("expect.js");

 describe("socket.io-adapter", () => {
@@ -26,7 +26,7 @@ describe("socket.io-adapter", () => {
    expect(adapter.sids.has("s2")).to.be(false);
  });

-  it("should return a list of sockets", () => {
+  it("should return a list of sockets", async () => {
    const adapter = new Adapter({
      server: { encoder: null },
      connected: new Map([
@@ -39,11 +39,11 @@ describe("socket.io-adapter", () => {
    adapter.addAll("s2", new Set(["r2", "r3"]));
    adapter.addAll("s3", new Set(["r3"]));

-    const sockets = adapter.sockets(new Set());
+    const sockets = await adapter.sockets(new Set());
    expect(sockets).to.be.a(Set);
    expect(sockets.size).to.be(3);
-    expect(adapter.sockets(new Set(["r2"])).size).to.be(2);
-    expect(adapter.sockets(new Set(["r4"])).size).to.be(0);
+    expect((await adapter.sockets(new Set(["r2"]))).size).to.be(2);
+    expect((await adapter.sockets(new Set(["r4"]))).size).to.be(0);
  });

  it("should return a list of rooms", () => {
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "outDir": "./dist",
+    "allowJs": false,
+    "target": "es2017",
+    "module": "commonjs",
+    "declaration": true
+  },
+  "include": [
+    "./lib/**/*"
+  ]
+}