Refactor the rqbit-web file by breaking it down into components and helper functions. Improve code organization and maintainability

crates/librqbit/webui/src/helper/customSetInterval.ts

@@ -0,0 +1,29 @@
+// Run a function with initial interval, then run it forever with the interval that the
+// callback returns.
+// Returns a callback to clear it.
+
+export function customSetInterval(
+  asyncCallback: () => Promise<number>,
+  initialInterval: number
+): () => void {
+  let timeoutId: number;
+  let currentInterval: number = initialInterval;
+
+  const executeCallback = async () => {
+    currentInterval = await asyncCallback();
+    if (currentInterval === null || currentInterval === undefined) {
+      throw "asyncCallback returned null or undefined";
+    }
+    scheduleNext();
+  };
+
+  let scheduleNext = () => {
+    timeoutId = setTimeout(executeCallback, currentInterval);
+  };
+
+  scheduleNext();
+
+  return () => {
+    clearTimeout(timeoutId);
+  };
+}