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

resources/scripts/state/admin/users.ts

@@ -0,0 +1,29 @@
+import type { Action } from 'easy-peasy';
+import { action } from 'easy-peasy';
+
+interface AdminUserStore {
+    selectedUsers: number[];
+
+    setSelectedUsers: Action<AdminUserStore, number[]>;
+    appendSelectedUser: Action<AdminUserStore, number>;
+    removeSelectedUser: Action<AdminUserStore, number>;
+}
+
+const users: AdminUserStore = {
+    selectedUsers: [],
+
+    setSelectedUsers: action((state, payload) => {
+        state.selectedUsers = payload;
+    }),
+
+    appendSelectedUser: action((state, payload) => {
+        state.selectedUsers = state.selectedUsers.filter(id => id !== payload).concat(payload);
+    }),
+
+    removeSelectedUser: action((state, payload) => {
+        state.selectedUsers = state.selectedUsers.filter(id => id !== payload);
+    }),
+};
+
+export type { AdminUserStore };
+export default users;