Initial Release (Cloudflare Workers)

service/src/Utils.ts

@@ -0,0 +1,75 @@
+import Fax from "./commands/Fax";
+import Realtalk from "./commands/Realtalk";
+import { InteractionResponse } from "./typings";
+
+export const CacheTTL = 60 * 60 * 24 * 7   // 1 Week
+export const Commands = [
+    Realtalk,
+    Fax,
+]
+
+/**
+ * Returns a Response for a JSON Object with Headers and custom Status if given
+ * @param body - Response Body
+ * @param statusCode - Status Code
+ * @returns {Response}
+ */
+export function ToJSONResponse(statusCode: number, body: any): Response {
+    return new Response(
+        JSON.stringify(body),
+        {
+            status: statusCode,
+            headers: {
+                "Content-Type": "application/json"
+            }
+        }
+    )
+}
+
+/**
+ * Converts an Interaction to a JSON Response accepted by Discord
+ * @param response - Interaction Response
+ * @returns {Response}
+ */
+export function ToInteractionResponse(response: InteractionResponse): Response {
+    return ToJSONResponse(200, response)
+}
+
+
+/**
+ * 
+ * @param env 
+ * @returns {string} - The Access Token
+ */
+export async function GetAccessToken(env: Env): Promise<string> {
+    return new Promise(async ok => {
+        // Check cache for the current token
+        let kvkey = "app_token"
+        let token = await env.CFKV.get(kvkey, "text")
+        if (token) return ok(token.toString())
+
+        // Get frehs access token from discord
+        const resp = await fetch(
+            "https://discord.com/api/v8/oauth2/token",
+            {
+                method: "POST",
+                headers: {
+                    "content-type": "application/x-www-form-urlencoded",
+                    "authorization": `Basic ${btoa(`${env.APPLICATION_ID}:${env.APPLICATION_SECRET}`)}`
+                },
+                body: new URLSearchParams({
+                    grant_type: "client_credentials",
+                    scope: "applications.commands.update"
+                }),
+            }
+        )
+        const Body: {
+            access_token: string
+            expires_in: number
+        } = await resp.json() as any
+
+        // Store token in cache
+        env.CFKV.put(kvkey, Body.access_token, { expirationTtl: Body.expires_in })
+        return ok(Body.access_token)
+    });
+}