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server/services/flows/flow_utils.js

@@ -0,0 +1,27 @@
+export async function sleep_ms(ms) {
+  await new Promise((resolve) => setTimeout(resolve, ms));
+}
+
+export async function map_limit(items, limit, worker) {
+  const list = Array.isArray(items) ? items : [];
+  const n = Math.max(1, Number(limit || 1));
+
+  const res = new Array(list.length);
+  let idx = 0;
+
+  async function run_one() {
+    while (idx < list.length) {
+      const cur = idx;
+      idx += 1;
+      res[cur] = await worker(list[cur], cur);
+    }
+  }
+
+  const runners = [];
+  for (let i = 0; i < Math.min(n, list.length); i += 1) {
+    runners.push(run_one());
+  }
+
+  await Promise.all(runners);
+  return res;
+}