Implement issue 1 search, order reuse and tracking

po_app/material_prices.py

@@ -0,0 +1,52 @@
+"""Keep the material catalog's latest approved price and supplier-specific quotes."""
+from decimal import Decimal
+
+from models import Material, Order, OrderItem
+
+
+def remember_approved_prices(db, order):
+    """Update only unambiguous material codes in the approval transaction."""
+    updated = 0
+    for item in order.items:
+        code = (item.material_code or '').strip()
+        if not code or item.price is None or item.price <= 0:
+            continue
+        matches = db.query(Material).filter(Material.code == code).all()
+        exact = [material for material in matches if (material.spec or '').strip() == (item.material_spec or '').strip()]
+        if len(exact) == 1:
+            material = exact[0]
+        elif len(matches) == 1:
+            material = matches[0]
+        elif not matches:
+            material = Material(code=code, spec=item.material_spec or '', unit=item.unit or '', active=True)
+            db.add(material)
+        else:
+            # Duplicate codes with different specs are ambiguous; preserve both records.
+            continue
+        material.price = item.price
+        updated += 1
+    return updated
+
+
+def supplier_price_map(db, supplier_name, supplier_tax_no='', user=None):
+    """Most recent approved unit price for each code from the chosen supplier."""
+    name = (supplier_name or '').strip()
+    if not name:
+        return {}
+    query = (db.query(OrderItem.material_code, OrderItem.price, Order.supplier_tax_no)
+             .join(Order, OrderItem.order_id == Order.id)
+             .filter(Order.status == 'approved', Order.supplier_name == name,
+                     OrderItem.material_code != '')
+             .order_by(Order.approved_at.desc(), Order.id.desc(), OrderItem.seq.desc()))
+    if user and user.role == 'maker':
+        query = query.filter(Order.created_by == user.id)
+    rows = query.all()
+    tax = (supplier_tax_no or '').strip()
+    if tax and any((row.supplier_tax_no or '').strip() == tax for row in rows):
+        rows = [row for row in rows if (row.supplier_tax_no or '').strip() == tax]
+    result = {}
+    for row in rows:
+        code = (row.material_code or '').strip()
+        if code and code not in result and row.price is not None:
+            result[code] = str(Decimal(row.price))
+    return result