[Glitch] Fix ValidationError when loading many collections at once

Port 2b6b2fcb6f to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/utils/batch_array.ts

@@ -0,0 +1,15 @@
+/**
+ * Splits a long array so that the resulting nested arrays
+ * never exceed the `maxLength` provided.
+ * Useful when dealing with endpoints that accept a limited number
+ * of parameters
+ */
+export function batchArray<T>(array: T[], maxLength: number) {
+  const result: T[][] = [];
+
+  for (let i = 0; i < array.length; i += maxLength) {
+    result.push(array.slice(i, i + maxLength));
+  }
+
+  return result;
+}