Add HTTP interaction handler

discordbot.cfg

@@ -3,3 +3,6 @@
 # - copy this file elsewhere, modify, and execute it from another cfg file;
 # - copy and modify the individual convars you wish to configure;
 # - or modify this file, and execute it directly from another cfg file via the command `exec @discordbot/discordbot.cfg`.
+
+# The bot token to use for Discord API authentication.
+set discordbot:botToken "YOUR_BOT_TOKEN_HERE"

package.json

@@ -8,6 +8,11 @@
     "typecheck": "tsc -p server",
     "build": "npm run typecheck && rimraf dist && node build.js"
   },
+  "dependencies": {
+    "@discordjs/core": "1.0.0",
+    "@discordjs/rest": "2.0.0",
+    "tweetnacl": "^1.0.3"
+  },
   "devDependencies": {
     "@citizenfx/server": "^2.0.9780-1",
     "@types/node": "16.9.1",

server/http/handler.ts

@@ -0,0 +1,39 @@
+import {
+    APIInteraction,
+    APIInteractionResponse,
+    InteractionResponseType,
+    InteractionType,
+} from '@discordjs/core/http-only';
+import { HttpHandlerRequest, HttpHandlerResponse } from './types.js';
+import { verifyDiscordRequest } from './verify.js';
+
+async function handleInteraction(
+    interaction: APIInteraction,
+): Promise<APIInteractionResponse | void> {
+    switch (interaction.type) {
+        case InteractionType.Ping:
+            return { type: InteractionResponseType.Pong };
+    }
+}
+
+export function setupHttpHandler(verifyKey: string) {
+    const verify = verifyDiscordRequest(verifyKey);
+
+    async function handler(
+        request: HttpHandlerRequest,
+        response: HttpHandlerResponse,
+    ) {
+        request.setDataHandler(async (body) => {
+            if (!verify(request, body)) {
+                response.writeHead(401);
+                return response.send('invalid request signature');
+            }
+
+            const interaction = JSON.parse(body) as APIInteraction;
+            const result = await handleInteraction(interaction);
+            result && response.send(JSON.stringify(result));
+        });
+    }
+
+    SetHttpHandler(handler);
+}

server/http/types.d.ts

@@ -0,0 +1,18 @@
+export interface HttpHandlerRequest {
+    address: string;
+    headers: Record<string, string>;
+    method: string;
+    path: string;
+    setDataHandler(handler: (data: string) => void): void;
+    setDataHandler(
+        handler: (data: ArrayBuffer) => void,
+        binary: 'binary',
+    ): void;
+    setCancelHandler(handler: () => void): void;
+}
+
+export interface HttpHandlerResponse {
+    writeHead(code: number, headers?: Record<string, string | string[]>): void;
+    write(data: string): void;
+    send(data?: string): void;
+}