Configured collections list and barchart (PP-1535, PP-1536 & PP-1537) (…

…#124)

* Restrict roles to allowed values.

* Add some business rule hooks.

* Configured collections refactor.

* Factor out a StatsGroup component.

* Update patron stats and factor out more components.

src/businessRules/roleBasedAccess.ts

@@ -0,0 +1,27 @@
+import { useAppAdmin, useAppFeatureFlags } from "../context/appContext";
+
+// Not all methods taking this type will use the specified properties.
+// The type is here to ensure that the call site provides the right
+// properties, in case the rules change in the future.
+type HasLibraryKeyProps = {
+  library: string; // library "key" or "short name"
+  [key: string]: unknown;
+};
+
+// If the `reportsOnlyForSysadmins` feature flag is set, only system admins
+// may request inventory reports.
+export const useMayRequestInventoryReports = (
+  _: HasLibraryKeyProps
+): boolean => {
+  const admin = useAppAdmin();
+  const onlyForSysAdmins = useAppFeatureFlags().reportsOnlyForSysadmins;
+  return !onlyForSysAdmins || admin.isSystemAdmin();
+};
+
+// Only system admins may view the collection statistics barchart.
+export const useMayViewCollectionBarChart = (
+  _: HasLibraryKeyProps
+): boolean => {
+  const admin = useAppAdmin();
+  return admin.isSystemAdmin();
+};