update stream card, update leaderboards on match finished webhook

src/lib/events.ts

@@ -0,0 +1,56 @@
+import { EventEmitter } from 'node:events'
+export const globalEmitter = new EventEmitter()
+export function createEventIterator<T>(
+  emitter: EventEmitter,
+  eventName: string,
+  opts?: { signal?: AbortSignal }
+): AsyncIterableIterator<[T]> {
+  const events: [T][] = []
+  let resolvePromise: (() => void) | null = null
+  let done = false
+
+  const push = (data: T) => {
+    events.push([data])
+    if (resolvePromise) {
+      resolvePromise()
+      resolvePromise = null
+    }
+  }
+
+  const cleanup = () => {
+    done = true
+    emitter.off(eventName, push)
+    if (resolvePromise) {
+      resolvePromise()
+    }
+  }
+
+  emitter.on(eventName, push)
+  opts?.signal?.addEventListener('abort', cleanup)
+
+  return {
+    [Symbol.asyncIterator]() {
+      return this
+    },
+    async next() {
+      if (events.length > 0) {
+        return { value: events.shift()!, done: false }
+      }
+      if (done) {
+        return { value: undefined, done: true }
+      }
+      await new Promise<void>((resolve) => {
+        resolvePromise = resolve
+      })
+      return this.next()
+    },
+    async return() {
+      cleanup()
+      return { value: undefined, done: true }
+    },
+    async throw(error) {
+      cleanup()
+      throw error
+    },
+  }
+}