From d099951883f2a602f1facf5ef6d13e5e05882449 Mon Sep 17 00:00:00 2001
From: beatz174-bit <beatz174@gmail.com>
Date: Fri, 21 Nov 2025 18:20:26 +1000
Subject: [PATCH] Enhance barcode scanner lookup

---
 src/screens/BarcodeScannerScreen.tsx | 127 +++++++++++++++++++++++++--
 1 file changed, 120 insertions(+), 7 deletions(-)

diff --git a/src/screens/BarcodeScannerScreen.tsx b/src/screens/BarcodeScannerScreen.tsx
index 1f5aedc..2d7c056 100644
--- a/src/screens/BarcodeScannerScreen.tsx
+++ b/src/screens/BarcodeScannerScreen.tsx
@@ -1,9 +1,58 @@
-import { Container, Typography } from '@mui/material';
-import { useState } from 'react';
+import { Alert, Card, CardContent, Chip, Container, Divider, Stack, Typography } from '@mui/material';
+import { liveQuery } from 'dexie';
+import { useEffect, useMemo, useState } from 'react';
 import { BarcodeScannerView } from '../components/BarcodeScannerView';
+import { useDatabase } from '../context/DBProvider';
+import { Area } from '../models/Area';
+import { PickList } from '../models/PickList';
+import { Product } from '../models/Product';
+
+interface ProductLookup {
+  product?: Product | null;
+  pickLists: { list: PickList; area?: Area }[];
+}
 
 export const BarcodeScannerScreen = () => {
+  const db = useDatabase();
   const [lastCode, setLastCode] = useState('');
+  const [lookup, setLookup] = useState<ProductLookup>({ pickLists: [] });
+
+  useEffect(() => {
+    if (!lastCode) {
+      setLookup({ pickLists: [] });
+      return undefined;
+    }
+
+    const subscription = liveQuery(async () => {
+      const product = await db.products.where('barcode').equals(lastCode).first();
+
+      if (!product) {
+        return { product: null, pickLists: [] } satisfies ProductLookup;
+      }
+
+      const pickItems = await db.pickItems.where('product_id').equals(product.id).toArray();
+      const pickListIds = Array.from(new Set(pickItems.map((item) => item.pick_list_id)));
+      const pickLists = (await db.pickLists.bulkGet(pickListIds)).filter(
+        (list): list is PickList => Boolean(list),
+      );
+      const areas = await db.areas.bulkGet(pickLists.map((list) => list.area_id));
+      const areaMap = new Map<string, Area>();
+      areas.forEach((area) => {
+        if (area) areaMap.set(area.id, area);
+      });
+
+      return {
+        product,
+        pickLists: pickLists.map((list) => ({ list, area: areaMap.get(list.area_id) })),
+      } satisfies ProductLookup;
+    }).subscribe({
+      next: setLookup,
+    });
+
+    return () => subscription.unsubscribe();
+  }, [db, lastCode]);
+
+  const hasProduct = useMemo(() => lookup.product && lookup.product !== null, [lookup.product]);
 
   return (
     <Container sx={{ py: 4 }}>
@@ -11,11 +60,75 @@ export const BarcodeScannerScreen = () => {
         Barcode Scanner
       </Typography>
       <BarcodeScannerView onDetected={(code) => setLastCode(code)} />
-      {lastCode ? (
-        <Typography variant="body2" color="text.secondary" sx={{ mt: 2 }}>
-          Last detected: {lastCode}
-        </Typography>
-      ) : null}
+      <Stack spacing={2} sx={{ mt: 2 }}>
+        {lastCode ? (
+          <Card variant="outlined">
+            <CardContent>
+              <Stack direction="row" justifyContent="space-between" alignItems="center" spacing={1}>
+                <Typography variant="subtitle1">Last detected</Typography>
+                <Chip
+                  color={hasProduct ? 'success' : 'default'}
+                  label={hasProduct ? 'Product found' : 'Not linked to a product'}
+                  size="small"
+                />
+              </Stack>
+              <Typography variant="h6" sx={{ mt: 1 }}>
+                {lastCode}
+              </Typography>
+              {lookup.product === null ? (
+                <Alert severity="warning" sx={{ mt: 2 }}>
+                  This barcode is not present in the product list.
+                </Alert>
+              ) : null}
+            </CardContent>
+          </Card>
+        ) : null}
+
+        {lookup.product ? (
+          <Card variant="outlined">
+            <CardContent>
+              <Typography variant="subtitle1" gutterBottom>
+                Product
+              </Typography>
+              <Typography variant="h6">{lookup.product.name}</Typography>
+              <Typography variant="body2" color="text.secondary">
+                Category: {lookup.product.category}
+              </Typography>
+              {lookup.product.barcode ? (
+                <Typography variant="body2" color="text.secondary">
+                  Barcode: {lookup.product.barcode}
+                </Typography>
+              ) : null}
+            </CardContent>
+          </Card>
+        ) : null}
+
+        {hasProduct ? (
+          <Card variant="outlined">
+            <CardContent>
+              <Typography variant="subtitle1" gutterBottom>
+                Pick lists containing this product
+              </Typography>
+              {lookup.pickLists.length === 0 ? (
+                <Typography variant="body2" color="text.secondary">
+                  This product is not in any pick lists yet.
+                </Typography>
+              ) : (
+                <Stack divider={<Divider flexItem />} spacing={1}>
+                  {lookup.pickLists.map(({ list, area }) => (
+                    <Stack key={list.id} spacing={0.25}>
+                      <Typography variant="body1">Pick List #{list.id.slice(0, 8)}</Typography>
+                      <Typography variant="body2" color="text.secondary">
+                        Area: {area?.name ?? 'Unknown area'}
+                      </Typography>
+                    </Stack>
+                  ))}
+                </Stack>
+              )}
+            </CardContent>
+          </Card>
+        ) : null}
+      </Stack>
     </Container>
   );
 };