Added errorboundary, memoized items for performance.

src/App.js

@@ -8,6 +8,7 @@ import Items from './components/Items';
 import Navbar from './components/Navbar';  // Correct import here
 import Admin from './components/Admin';  // Correct import here
 import { createContext } from 'react';
+import ErrorBoundary from './components/ErrorBoundary';
 import './styles.css'
 
 export const AppContext = createContext();
@@ -26,10 +27,12 @@ function App() {
 
   return (
     <AppContext.Provider value={{ token, setToken }}>
-      <Router>
+      <ErrorBoundary>
-        <Navbar />
+        <Router>
-        <AppRoutes token={token} setToken={setToken} />
+          <Navbar />
-      </Router>
+          <AppRoutes token={token} setToken={setToken} />
+        </Router>
+      </ErrorBoundary>
     </AppContext.Provider>
   );
 }

src/components/ErrorBoundary.js

@@ -0,0 +1,36 @@
+import React from 'react';
+import { Alert, Button, Container } from '@mui/material';
+
+class ErrorBoundary extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = { hasError: false, error: null };
+  }
+
+  static getDerivedStateFromError(error) {
+    return { hasError: true, error };
+  }
+
+  render() {
+    if (this.state.hasError) {
+      return (
+        <Container>
+          <Alert severity="error" sx={{ mt: 2 }}>
+            Something went wrong
+            <Button 
+              onClick={() => window.location.reload()}
+              variant="outlined" 
+              size="small"
+              sx={{ ml: 2 }}
+            >
+              Reload Page
+            </Button>
+          </Alert>
+        </Container>
+      );
+    }
+    return this.props.children;
+  }
+}
+
+export default ErrorBoundary;

src/components/Items.js

@@ -1,4 +1,4 @@
-import React, { useEffect, useState, useRef } from 'react';
+import React, { useEffect, useState, useRef, useCallback, useMemo } from 'react';
 import { 
   Container, 
   Button,
@@ -27,6 +27,30 @@ import { useApiCall } from './hooks/useApiCall';
 import { api } from '../services/api';
 import ItemDetails from './ItemDetails';
 
+const Item = React.memo(({ item, onDelete, onEdit, itemImages }) => (
+  <TableRow>
+    <TableCell>
+      <Avatar src={itemImages[item.ID] || '/images/default.jpg'} />
+    </TableCell>
+    <TableCell>{item.name}</TableCell>
+    <TableCell>{item.description}</TableCell>
+    <TableCell>
+      <Box display="flex" justifyContent="space-between" width="100%">
+        <Tooltip title="Edit Item">
+          <IconButton onClick={() => onEdit(item)} size="large" sx={{ mr: 1 }}>
+            <EditIcon />
+          </IconButton>
+        </Tooltip>
+        <Tooltip title="Delete Item">
+          <IconButton onClick={() => onDelete(item.ID)} size="large" color="error">
+            <DeleteIcon />
+          </IconButton>
+        </Tooltip>
+      </Box>
+    </TableCell>
+  </TableRow>
+));
+
 export default function Items({ token }) {
   const { id: boxId } = useParams();
   const [items, setItems] = useState([]);
@@ -53,7 +77,7 @@ export default function Items({ token }) {
     const getItems = async () => {
       try {
         const response = await fetchItems(() => 
-          api.items.getAll(token, boxId)
+          boxId ? api.items.getByBox(token, boxId) : api.items.getAll(token)
         );
         setItems(response.data);
 
@@ -103,7 +127,7 @@ export default function Items({ token }) {
     return imageName;
   };
 
-  const handleSaveNewItem = async () => {
+  const handleSaveNewItem = useCallback(async () => {
     try {
       const newItemResponse = await createItem(() => 
         api.items.create(token, {
@@ -112,7 +136,7 @@ export default function Items({ token }) {
           box_id: parseInt(boxId, 10)
         })
       );
-
+  
       if (newItemResponse.status === 200 && fileInputRef.current?.files?.[0]) {
         const imageFile = fileInputRef.current.files[0];
         const newImageName = generateUniqueImageName(imageFile.name);
@@ -120,34 +144,49 @@ export default function Items({ token }) {
         formData.append('image', new File([imageFile], newImageName, {
           type: imageFile.type,
         }));
-
+  
         await uploadImage(() => 
           api.items.uploadImage(token, newItemResponse.data.id, formData)
         );
+        if (newItemResponse.data.id) {
+          try {
+            const imageResponse = await api.items.getImage(token, newItemResponse.data.id);
+            const reader = new FileReader();
+            reader.onload = () => {
+              setItemImages(prev => ({
+                ...prev,
+                [newItemResponse.data.id]: reader.result
+              }));
+            };
+            reader.readAsDataURL(imageResponse.data);
+          } catch (err) {
+            setItemImages(prev => ({
+              ...prev,
+              [newItemResponse.data.id]: '/default.jpg'
+            }));
+          }
+        }
       }
-
+  
       handleCloseAddItemDialog();
       
-      // Refresh items list
       const response = await fetchItems(() => 
-        api.items.getAll(token, boxId)
+        boxId ? api.items.getByBox(token, boxId) : api.items.getAll(token)
       );
       setItems(response.data);
     } catch (err) {}
-  };
+  }, [token, boxId, newItemName, newItemDescription, createItem, uploadImage, fetchItems]);
 
-  const handleDeleteItem = async (itemId) => {
+  const handleDeleteItem = useCallback(async (itemId) => {
     try {
-      await deleteItem(() => 
+      await deleteItem(() => api.items.delete(token, itemId));
-        api.items.delete(token, itemId)
+      setItems(prev => prev.filter(item => item.ID !== itemId));
-      );
-      setItems(items.filter(item => item.ID !== itemId));
     } catch (err) {}
-  };
+  }, [token, deleteItem]);
 
-  const handleEditItem = (item) => {
+  const handleEditItem = useCallback((item) => {
     setEditingItem(item);
-  };
+  }, []);
 
   const handleSaveEdit = async () => {
     setEditingItem(null);
@@ -157,9 +196,12 @@ export default function Items({ token }) {
     setItems(response.data);
   };
 
-  const filteredItems = items.filter(item =>
+  const filteredItems = useMemo(() => 
-    item.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
+    items.filter(item =>
-    item.description.toLowerCase().includes(searchQuery.toLowerCase())
+      item.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
+      item.description.toLowerCase().includes(searchQuery.toLowerCase())
+    ),
+    [items, searchQuery]
   );
 
   return (
@@ -251,40 +293,17 @@ export default function Items({ token }) {
                 <TableCell>Actions</TableCell>
               </TableRow>
             </TableHead>
-            <TableBody>
+              <TableBody>
-              {filteredItems.map((item) => (
+                {filteredItems.map((item) => (
-                <TableRow key={item.ID}>
+                  <Item 
-                  <TableCell>
+                    key={item.ID}
-                    <Avatar src={itemImages[item.ID] || '/images/default.jpg'} />
+                    item={item}
-                  </TableCell>
+                    itemImages={itemImages}
-                  <TableCell>{item.name}</TableCell>
+                    onDelete={handleDeleteItem}
-                  <TableCell>{item.description}</TableCell>
+                    onEdit={handleEditItem}
-                  <TableCell>
+                  />
-                    <Box display="flex" justifyContent="space-between" width="100%">
+                ))}
-                      <Tooltip title="Edit Item">
+              </TableBody>
-                        <IconButton 
-                          onClick={() => handleEditItem(item)}
-                          size="large"
-                          sx={{ mr: 1 }}
-                        >
-                          <EditIcon />
-                        </IconButton>
-                      </Tooltip>
-                      <Tooltip title="Delete Item">
-                        <IconButton 
-                          onClick={() => handleDeleteItem(item.ID)}
-                          size="large"
-                          color="error"
-                          disabled={deletingItem}
-                        >
-                          {deletingItem ? <CircularProgress size={20} /> : <DeleteIcon />}
-                        </IconButton>
-                      </Tooltip>
-                    </Box>
-                  </TableCell>
-                </TableRow>
-              ))}
-            </TableBody>
           </Table>
         </TableContainer>
       )}