Load limiting safeguards

dashboard/src/todo.md

@@ -3,23 +3,24 @@ title: Todo
 ---
 
 ```js
-import {API, POLL} from "./components/config.js";
+import {API, POLL_HEAVY, apiFetch, pollDelay, sleep} from "./components/config.js";
 const THIS_REPO = "the-custodian";
 ```
 
 ```js
 // Live poll: tasks + workstreams + topics + contributions
 const todoState = (async function*() {
+  let failures = 0;
   while (true) {
     let tasks = [], contribs = [], improvements = [], wsMap = {}, ok = false;
     try {
       const [rt, rw, rto, rr, rc, ri] = await Promise.all([
-        fetch(`${API}/tasks/?limit=500`),
-        fetch(`${API}/workstreams/`),
-        fetch(`${API}/topics/`),
-        fetch(`${API}/repos/`),
-        fetch(`${API}/contributions/`),
-        fetch(`${API}/technical-debt/?debt_type=dashboard-improvement`),
+        apiFetch("/tasks/?limit=500"),
+        apiFetch("/workstreams/"),
+        apiFetch("/topics/"),
+        apiFetch("/repos/"),
+        apiFetch("/contributions/"),
+        apiFetch("/technical-debt/?debt_type=dashboard-improvement"),
       ]);
       ok = rt.ok && rw.ok && rto.ok && rr.ok && rc.ok;
       if (ok) {
@@ -42,8 +43,9 @@ const todoState = (async function*() {
         improvements = ri.ok ? (await ri.json()).filter(t => t.debt_type === "dashboard-improvement" && !CLOSED.has(t.status)) : [];
       }
     } catch {}
+    failures = ok ? 0 : failures + 1;
     yield {tasks, contribs, improvements, ok, ts: new Date()};
-    await new Promise(res => setTimeout(res, POLL));
+    await sleep(pollDelay({ok, base: POLL_HEAVY, failures}));
   }
 })();
 ```