Uniformize folder structure (#693)

* Uniformize folder structure

* Fix icons

* Fix icons

* Fix tests

* Fix tests

front/src/modules/ui/snack-bar/states/snackBarState.ts

@@ -0,0 +1,39 @@
+import { atom, selector } from 'recoil';
+
+import { SnackbarProps } from '../components/SnackBar';
+
+export type SnackBarOptions = SnackbarProps & {
+  id: string;
+};
+
+export type SnackBarState = {
+  maxQueue: number;
+  queue: SnackBarOptions[];
+};
+
+export const snackBarInternalState = atom<SnackBarState>({
+  key: 'snackBarState',
+  default: {
+    maxQueue: 3,
+    queue: [],
+  },
+});
+
+export const snackBarSetQueueState = selector<SnackBarOptions | null>({
+  key: 'snackBarQueueState',
+  get: ({ get }) => null, // We don't care about getting the value
+  set: ({ set }, newValue) =>
+    set(snackBarInternalState, (prev) => {
+      if (prev.queue.length >= prev.maxQueue) {
+        return {
+          ...prev,
+          queue: [...prev.queue.slice(1), newValue] as SnackBarOptions[],
+        };
+      }
+
+      return {
+        ...prev,
+        queue: [...prev.queue, newValue] as SnackBarOptions[],
+      };
+    }),
+});