Load limiting safeguards

dashboard/src/ui-feedback.md

@@ -3,7 +3,7 @@ title: UI Feedback
 ---
 
 ```js
-import {API, POLL} from "./components/config.js";
+import {API, POLL_HEAVY, apiFetch, pollDelay, sleep} from "./components/config.js";
 ```
 
 ```js
@@ -47,10 +47,11 @@ function nextStep(current) {
 
 ```js
 const feedbackState = (async function*() {
+  let failures = 0;
   while (true) {
     let data = [], ok = false;
     try {
-      const r = await fetch(`${API}/technical-debt/?debt_type=dashboard-improvement`);
+      const r = await apiFetch("/technical-debt/?debt_type=dashboard-improvement");
       ok = r.ok;
       if (ok) {
         const items = await r.json();
@@ -62,8 +63,9 @@ const feedbackState = (async function*() {
           });
       }
     } catch {}
+    failures = ok ? 0 : failures + 1;
     yield {data, ok, ts: new Date()};
-    await new Promise(res => setTimeout(res, POLL));
+    await sleep(pollDelay({ok, base: POLL_HEAVY, failures}));
   }
 })();
 ```