ui(admin): add "working" React admin ui

resources/scripts/state/admin/allocations.ts

@@ -0,0 +1,29 @@
+import type { Action } from 'easy-peasy';
+import { action } from 'easy-peasy';
+
+interface AdminAllocationStore {
+    selectedAllocations: number[];
+
+    setSelectedAllocations: Action<AdminAllocationStore, number[]>;
+    appendSelectedAllocation: Action<AdminAllocationStore, number>;
+    removeSelectedAllocation: Action<AdminAllocationStore, number>;
+}
+
+const allocations: AdminAllocationStore = {
+    selectedAllocations: [],
+
+    setSelectedAllocations: action((state, payload) => {
+        state.selectedAllocations = payload;
+    }),
+
+    appendSelectedAllocation: action((state, payload) => {
+        state.selectedAllocations = state.selectedAllocations.filter(id => id !== payload).concat(payload);
+    }),
+
+    removeSelectedAllocation: action((state, payload) => {
+        state.selectedAllocations = state.selectedAllocations.filter(id => id !== payload);
+    }),
+};
+
+export type { AdminAllocationStore };
+export default allocations;