[scraper] adds timeout to seeders updating

scraper/lib/promises.js

@@ -33,6 +33,20 @@ async function delay(duration) {
   return new Promise((resolve) => setTimeout(resolve, duration));
 }
 
+/**
+ * Timeout promise after a set time in ms
+ */
+async function timeout(timeoutMs, promise, message = 'Timed out') {
+  return Promise.race([
+    promise,
+    new Promise(function (resolve, reject) {
+      setTimeout(function () {
+        reject(message);
+      }, timeoutMs);
+    })
+  ]);
+}
+
 /**
  * Return most common value from given array.
  */
@@ -40,4 +54,4 @@ function mostCommonValue(array) {
   return array.sort((a, b) => array.filter(v => v === a).length - array.filter(v => v === b).length).pop();
 }
 
-module.exports = { sequence, first, delay, mostCommonValue };
+module.exports = { sequence, first, delay, timeout, mostCommonValue };