Artikel-Verwaltung und responsive Tiles

- Admin: Artikel löschen (min. 1 erforderlich)
- Admin: Neue Artikel hinzufügen
- Admin: Update-Logik für variable Artikelanzahl
- Kasse: Dynamische items/Session pro Produkt
- Kasse: CSS Grid Layout - alle Artikel fit auf einen Bildschirm
- Kasse: Leerzustand wenn keine Artikel

Made-with: Cursor

app.py

@@ -1,3 +1,4 @@
+import math
 import os
 import time
 import logging
@@ -110,7 +111,7 @@ def index(instance_id):
     gesamtwert = session.get(f'{session_prefix}gesamtwert', 0.0)
     change = session.get(f'{session_prefix}change', "0.00")
     givenfloat = session.get(f'{session_prefix}given', 0.0)
-    items = {i: session.get(f'{session_prefix}item{i}', 0) for i in range(1, 7)}
+    items = {p: session.get(f'{session_prefix}item{p}', 0) for p in products}
     
     background = "bg-white"
     
@@ -122,7 +123,7 @@ def index(instance_id):
             gesamtwert = 0.0
             change = "0.00"
             givenfloat = 0.0
-            items = {i: 0 for i in range(1, 7)}
+            items = {p: 0 for p in products}
             background = "bg-white"
         elif action == "calculate_change":
             given = request.form.get('given', "0", type=float)
@@ -138,15 +139,21 @@ def index(instance_id):
         session[f'{session_prefix}gesamtwert'] = round(gesamtwert, 2)
         session[f'{session_prefix}change'] = change
         session[f'{session_prefix}given'] = round(givenfloat, 2)
-        for i in range(1, 7):
-            session[f'{session_prefix}item{i}'] = items[i]
+        for p in products:
+            session[f'{session_prefix}item{p}'] = items[p]
             
         # Update our local variables after processing so they reflect what is rendered
         gesamtwert = round(gesamtwert, 2)
 
+    n = len(products)
+    grid_cols = math.ceil(math.sqrt(n)) if n else 1
+    grid_rows = math.ceil(n / grid_cols) if n else 1
+
     return render_template("index.html", 
         instance_id=instance_id,
         products=products,
+        grid_cols=grid_cols,
+        grid_rows=grid_rows,
         gesamtwert=f"{gesamtwert:.2f}",
         change=change,
         given=f"{givenfloat:.2f}" if givenfloat > 0 else "0",
@@ -202,19 +209,49 @@ def admin(instance_id):
             conn.close()
             session.pop(auth_key, None)
             return redirect(url_for('landing'))
+
+        for key in request.form:
+            if key.startswith('delete_') and request.form[key]:
+                pos = int(key.split('_')[1])
+                conn.execute('DELETE FROM products WHERE instance_id = ? AND position = ?',
+                             (instance_id, pos))
+                conn.commit()
+                conn.close()
+                return redirect(url_for('admin', instance_id=instance_id))
+
+        if action == "add_product":
+            name = request.form.get('add_name', '').strip()
+            price = request.form.get('add_price', type=float)
+            icon = request.form.get('add_icon', '🛒').strip() or '🛒'
+            color = request.form.get('add_color', 'btn-primary')
+            if name and price is not None:
+                max_pos = conn.execute(
+                    'SELECT COALESCE(MAX(position), 0) FROM products WHERE instance_id = ?',
+                    (instance_id,)
+                ).fetchone()[0]
+                conn.execute(
+                    'INSERT INTO products (instance_id, position, name, price, icon, color_class) VALUES (?, ?, ?, ?, ?, ?)',
+                    (instance_id, max_pos + 1, name, price, icon, color)
+                )
+            conn.commit()
+            conn.close()
+            return redirect(url_for('admin', instance_id=instance_id))
             
-        # Additional safety: Ensure that the post request isn't processed if not authenticated
-        # (Though we checked above, this is for the product update form submission)
-        for i in range(1, 7):
-            name = request.form.get(f'name_{i}')
-            price = request.form.get(f'price_{i}', type=float)
-            icon = request.form.get(f'icon_{i}')
-            color = request.form.get(f'color_{i}')
+        # Update existing products
+        products_rows = conn.execute(
+            'SELECT position FROM products WHERE instance_id = ?', (instance_id,)
+        ).fetchall()
+        for row in products_rows:
+            pos = row['position']
+            name = request.form.get(f'name_{pos}')
+            price = request.form.get(f'price_{pos}', type=float)
+            icon = request.form.get(f'icon_{pos}')
+            color = request.form.get(f'color_{pos}')
             if name is not None and price is not None:
                 conn.execute('''
                     UPDATE products SET name = ?, price = ?, icon = ?, color_class = ?
                     WHERE instance_id = ? AND position = ?
-                ''', (name, price, icon, color, instance_id, i))
+                ''', (name, price, icon, color, instance_id, pos))
         conn.commit()
         conn.close()
         return redirect(url_for('index', instance_id=instance_id))