Widgets work

frontend/app/services/Campaign.js

@@ -1,12 +1,41 @@
+import Server from './Server';
+
+const SELECTED_CAMPAIGN_KEY = 'selectedCampaignId';
+
 export const useCampaignService = () => {
   const Campaign = useState('campaign', () => null)
 
   const SetCampaign = (data) => {
     Campaign.value = data;
+    if (data?._id) {
+      localStorage.setItem(SELECTED_CAMPAIGN_KEY, data._id);
+    } else {
+      localStorage.removeItem(SELECTED_CAMPAIGN_KEY);
+    }
+  }
+
+  const RestoreCampaign = async () => {
+    const campaignId = localStorage.getItem(SELECTED_CAMPAIGN_KEY);
+    if (!campaignId) return false;
+
+    try {
+      const response = await Server().get(`/campaign/retrieve/${campaignId}`);
+      if (response.data.status !== 'ok') {
+        SetCampaign(null);
+        return false;
+      }
+
+      SetCampaign(response.data.campaign);
+      return true;
+    } catch (error) {
+      SetCampaign(null);
+      return false;
+    }
   }
 
   return {
     Campaign,
-    SetCampaign
+    SetCampaign,
+    RestoreCampaign
   }
-}
+}