[ADD] delivery_stock_picking_batch: Add carrier & weight to autobatch

Improves the auto-batcher, allowing it to also group by :
 - Carrier
While adding a new restriction on the batch size as well :
 - Max weight per batch

Task-2670580

Part-of: odoo/odoo#81533

addons/delivery_stock_picking_batch/__init__.py

@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import models

addons/delivery_stock_picking_batch/__manifest__.py

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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+{
+    'name': 'Delivery Stock Picking Batch',
+    'version': '1.0',
+    'category': 'Hidden',
+    'summary': 'Batch Transfer, Carrier',
+    'description': """
+This module makes the link between the batch pickings and carrier applications.
+
+Allows to prepare batches depending on their carrier
+""",
+    'depends': ['delivery', 'stock_picking_batch'],
+    'data': [
+        'views/stock_picking_type_views.xml',
+    ],
+    'installable': True,
+    'auto_install': True,
+    'license': 'LGPL-3',
+}

addons/delivery_stock_picking_batch/models/__init__.py

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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import stock_picking
+from . import stock_picking_batch

addons/delivery_stock_picking_batch/models/stock_picking.py

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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, fields, models
+from odoo.osv import expression
+
+
+class StockPickingType(models.Model):
+    _inherit = "stock.picking.type"
+
+    def _get_default_weight_uom(self):
+        return self.env['product.template']._get_weight_uom_name_from_ir_config_parameter()
+
+    batch_group_by_carrier = fields.Boolean('Carrier', help="Automatically group batches by carriers")
+    batch_max_weight = fields.Integer("Maximum weight per batch",
+                                      help="A transfer will not be automatically added to batches that will exceed this weight if the transfer is added to it.\n"
+                                           "Leave this value as '0' if no weight limit.")
+    weight_uom_name = fields.Char(string='Weight unit of measure label', compute='_compute_weight_uom_name', readonly=True, default=_get_default_weight_uom)
+
+    def _compute_weight_uom_name(self):
+        for picking_type in self:
+            picking_type.weight_uom_name = self.env['product.template']._get_weight_uom_name_from_ir_config_parameter()
+
+    @api.model
+    def _get_batch_group_by_keys(self):
+        return super()._get_batch_group_by_keys() + ['batch_group_by_carrier']
+
+
+class StockPicking(models.Model):
+    _inherit = "stock.picking"
+
+    def _get_possible_pickings_domain(self):
+        domain = super()._get_possible_pickings_domain()
+        if self.picking_type_id.batch_group_by_carrier:
+            domain = expression.AND([domain, [('carrier_id', '=', self.carrier_id.id if self.carrier_id else False)]])
+
+        return domain
+
+    def _get_possible_batches_domain(self):
+        domain = super()._get_possible_batches_domain()
+        if self.picking_type_id.batch_group_by_carrier:
+            domain = expression.AND([domain, [('picking_ids.carrier_id', '=', self.carrier_id.id if self.carrier_id else False)]])
+
+        return domain
+
+    def _is_auto_batchable(self, picking=None):
+        """ Verifies if a picking can be put in a batch with another picking without violating auto_batch constrains.
+        """
+        res = super()._is_auto_batchable(picking)
+        if self.picking_type_id.batch_max_weight:
+            res = res and (self.weight + picking.weight <= self.picking_type_id.batch_max_weight)
+        return res

addons/delivery_stock_picking_batch/models/stock_picking_batch.py

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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import models
+
+class StockPickingBatch(models.Model):
+    _inherit = "stock.picking.batch"
+
+    def _is_picking_auto_mergeable(self, picking):
+        """ Verifies if a picking can be safely inserted into the batch without violating auto_batch_constrains.
+        """
+        res = super()._is_picking_auto_mergeable(picking)
+        if self.picking_type_id.batch_max_weight:
+            batch_weight = sum(self.picking_ids.mapped('weight'))
+            res = res and (batch_weight + picking.weight <= self.picking_type_id.batch_max_weight)
+        return res

addons/delivery_stock_picking_batch/views/stock_picking_type_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="view_picking_type_form_inherit" model="ir.ui.view">
+        <field name="name">stock.picking.type.form.inherit</field>
+        <field name="model">stock.picking.type</field>
+        <field name="inherit_id" ref="stock_picking_batch.view_picking_type_form_inherit"/>
+        <field name="arch" type="xml">
+            <div name="batch_contact" position="after">
+                <span attrs="{'invisible':[('auto_batch', '=', False)]}"/>
+                <div name="batch_carrier" class="o_row" attrs="{'invisible':[('auto_batch', '=', False)]}">
+                    <field name="batch_group_by_carrier"/>
+                    <label for="batch_group_by_carrier"/>
+                </div>
+            </div>
+            <field name="batch_auto_confirm" position="before">
+                <label for="batch_max_weight" attrs="{'invisible': [('auto_batch', '=', False)]}"/>
+                <div class="o_row" name="batch_max_weight" attrs="{'invisible': [('auto_batch', '=', False)]}">
+                    <field name="batch_max_weight"/>
+                    <span><field name="weight_uom_name"/></span>
+                </div>
+            </field>
+        </field>
+    </record>
+</odoo>