From b3b780331387901091ebf176061b832116af53b5 Mon Sep 17 00:00:00 2001
From: laurentbarontini <l.barontini@open-squared.ch>
Date: Sun, 7 Jun 2026 07:23:32 +0200
Subject: [PATCH] Link to transport

---
 modules/purchase_trade/lot.py               | 56 ++++++++++++++++++---
 modules/purchase_trade/tests/test_module.py | 27 ++++++++++
 2 files changed, 75 insertions(+), 8 deletions(-)

diff --git a/modules/purchase_trade/lot.py b/modules/purchase_trade/lot.py
index 975ae5c..06c21ff 100755
--- a/modules/purchase_trade/lot.py
+++ b/modules/purchase_trade/lot.py
@@ -2954,14 +2954,16 @@ class LotShipping(Wizard):
 
     start = StateTransition()
 
-    ship = StateView(
-        'lot.shipping.start',
-        'purchase_trade.shipping_view_form', [
-        Button("Cancel", 'end', 'tryton-cancel'),
-        Button("Link", 'shipping', 'tryton-ok', default=True),
-        ])
-    
-    shipping = StateTransition()
+    ship = StateView(
+        'lot.shipping.start',
+        'purchase_trade.shipping_view_form', [
+        Button("Cancel", 'end', 'tryton-cancel'),
+        Button("Create shipment", 'create_shipment', 'tryton-add'),
+        Button("Link", 'shipping', 'tryton-ok', default=True),
+        ])
+    
+    create_shipment = StateTransition()
+    shipping = StateTransition()
 
     def transition_start(self):
         if self.model.__name__ == 'lot.report':
@@ -2980,6 +2982,44 @@ class LotShipping(Wizard):
             values['planned_to_location'] = record.r_planned_to_location.id
         return values
 
+    @staticmethod
+    def _record_id(record):
+        return record.id if record else None
+
+    def _unique_supplier(self):
+        suppliers = {}
+        for record in self.records:
+            supplier = getattr(record, 'r_supplier', None)
+            if supplier:
+                suppliers[supplier.id] = supplier
+        if len(suppliers) == 1:
+            return next(iter(suppliers.values()))
+        if not suppliers:
+            raise UserError("Supplier is required to create a shipment.")
+        raise UserError(
+            "Please select lots with the same supplier to create a shipment.")
+
+    def _shipment_in_create_values(self):
+        if self.ship.shipment != 'in':
+            raise UserError("Shipment creation is only available for Shipment In.")
+        supplier = self._unique_supplier()
+        values = {
+            'supplier': self._record_id(supplier),
+            }
+        if self.ship.planned_from_location:
+            values['from_location'] = self.ship.planned_from_location.id
+        if self.ship.planned_to_location:
+            values['to_location'] = self.ship.planned_to_location.id
+        return values
+
+    def transition_create_shipment(self):
+        ShipmentIn = Pool().get('stock.shipment.in')
+        if self.ship.shipment_in:
+            return 'ship'
+        shipment, = ShipmentIn.create([self._shipment_in_create_values()])
+        self.ship.shipment_in = shipment
+        return 'ship'
+
     def transition_shipping(self):
         Lot = Pool().get('lot.lot')
         LotQt = Pool().get('lot.qt')
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index a4c57c7..5e5b1f4 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -219,6 +219,33 @@ class PurchaseTradeTestCase(ModuleTestCase):
             'planned_to_location': 20,
         })
 
+    def test_lot_shipping_create_shipment_uses_planned_locations(self):
+        'link to transport creates shipment in from planned locations'
+        wizard = lot_module.LotShipping()
+        supplier = Mock(id=30)
+        created_shipment = Mock()
+        ShipmentIn = Mock()
+        ShipmentIn.create.return_value = [created_shipment]
+        wizard.records = [Mock(r_supplier=supplier)]
+        wizard.ship = Mock(
+            shipment='in',
+            shipment_in=None,
+            planned_from_location=Mock(id=10),
+            planned_to_location=Mock(id=20),
+        )
+
+        with patch('trytond.modules.purchase_trade.lot.Pool') as PoolMock:
+            PoolMock.return_value.get.return_value = ShipmentIn
+            state = wizard.transition_create_shipment()
+
+        self.assertEqual(state, 'ship')
+        ShipmentIn.create.assert_called_once_with([{
+            'supplier': 30,
+            'from_location': 10,
+            'to_location': 20,
+        }])
+        self.assertEqual(wizard.ship.shipment_in, created_shipment)
+
     @with_transaction()
     def test_get_mtm_applies_component_ratio_as_percentage(self):
         'get_mtm treats component ratio as a percentage'