fix: more imports

packages/core/src/blitz/fetchBlitz.ts

@@ -0,0 +1,88 @@
+import { assertSecret, EventManager, Region } from '@blitzkit/core';
+import { patientFetch } from '../../../website/src/core/blitzkit/patientFetch';
+
+const RETRY_ERRORS = ['REQUEST_LIMIT_EXCEEDED', 'SOURCE_NOT_AVAILABLE'];
+
+export const retryAbleBlitzFetchEvent = new EventManager();
+export const blitzFetchQueueAvailableEvent = new EventManager();
+
+type BlitzResponse<Data extends object> =
+  | {
+      status: 'error';
+      error: { field: string; message: string; code: 402; value: null };
+    }
+  | {
+      status: 'ok';
+      data: Data;
+    };
+
+const MAX_CALLS_PER_SECOND = 10;
+
+const queue: { url: string; resolve: (data: object) => void }[] = [];
+let inProgress = 0;
+
+function decrement() {
+  inProgress--;
+  blitzFetchQueueAvailableEvent.emit(undefined);
+  manageQueue();
+}
+
+async function manageQueue() {
+  if (queue.length > 0 && inProgress < MAX_CALLS_PER_SECOND) {
+    inProgress++;
+
+    const timeout = setTimeout(decrement, 1000);
+    const request = queue.shift()!;
+    const data = (await patientFetch(request.url)
+      .then((response) => response.json())
+      .catch((error) => ({ status: 'error', error }))) as BlitzResponse<
+      typeof request.resolve
+    >;
+
+    if (data.status === 'ok') {
+      request.resolve(data.data);
+    } else {
+      if (RETRY_ERRORS.includes(data.error.message)) {
+        retryAbleBlitzFetchEvent.emit(undefined);
+        clearTimeout(timeout);
+        setTimeout(() => {
+          queue.push(request);
+          decrement();
+        }, 1000 / MAX_CALLS_PER_SECOND);
+      } else {
+        clearTimeout(timeout);
+        decrement();
+
+        throw new Error(`Wargaming response error status: "${data.status}"`, {
+          cause: `Message: "${data.error.message}"\nURL: "${request.url}"`,
+        });
+      }
+    }
+  }
+}
+
+export type FetchBlitzParams = Record<string, string | number | undefined>;
+
+export function fetchBlitz<Data extends object>(
+  region: Region,
+  path: string,
+  params: FetchBlitzParams = {},
+) {
+  return new Promise<Data>((resolve) => {
+    queue.push({
+      url: `https://api.wotblitz.${region}/wotb/${path}/?${Object.entries({
+        application_id: assertSecret(
+          process.env.NEXT_PUBLIC_WARGAMING_APPLICATION_ID,
+        ),
+        ...params,
+      })
+        .filter(([_, value]) => value !== undefined)
+        .map(([key, value]) => `${key}=${encodeURIComponent(value!)}`)
+        .join('&')}`,
+      resolve(data) {
+        resolve(data as Data);
+      },
+    });
+    manageQueue();
+  });
+}