[ADD] sale_extension: add module to distribute cost over other sales lines

- add wizard to list order lines to distribute the cost

task-4496358

Author: kiga-odoo

sale_extension/__init__.py

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+from . import models
+from . import wizard

sale_extension/__manifest__.py

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+{
+    'name': 'Sale Extension',
+    'version': '1.0',
+    'depends': ['base', 'sale', 'sale_management'],
+    'author': "Kishan B. Gajera",
+    'category': 'Sale/Sale',
+    'description': """
+        A sample sale extension
+    """,
+
+    'application': True,
+    'installable': True,
+
+    'data': [
+        'security/ir.model.access.csv',
+        'views/sale_order_views.xml',
+        'wizard/cost_distribution_wizard.xml',
+    ],
+
+    'license':'LGPL-3',
+}

sale_extension/models/__init__.py

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+from . import sale_order_line

sale_extension/models/sale_order_line.py

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+from odoo import models, fields
+
+class SaleOrderLine(models.Model):
+    _inherit = 'sale.order.line'
+
+    distributed_cost = fields.Float("Distributed Cost")
+
+    def action_distribute_cost(self):
+        return {
+            'type': 'ir.actions.act_window',
+            'name': 'Distribute Cost',
+            'res_model': 'cost.distribution.wizard',
+            'view_mode': 'form',
+            'target': 'new',
+            'context': {
+                'order_id': self.order_id.id,
+                'default_order_line_id': self.id,
+                'default_price_subtotal': self.price_subtotal,
+            }
+        }

sale_extension/security/ir.model.access.csv

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+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+sale_extension.access_cost_distribution_wizard,access_cost_distribution_wizard,sale_extension.model_cost_distribution_wizard,base.group_user,1,1,1,1

sale_extension/views/sale_order_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="view_order_form_inherit" model="ir.ui.view">
+        <field name="name">sale.order.view.form.inherit</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_order_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='product_template_id']" position="after">
+                <button icon="fa-share-alt" string=" " type="object" name="action_distribute_cost"></button>
+            </xpath>
+            <xpath expr="//field[@name='price_total'][@invisible='is_downpayment']" position="after">
+                <field name="distributed_cost"></field>
+            </xpath>
+        </field>
+    </record>
+
+</odoo>

sale_extension/wizard/__init__.py

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+from . import cost_distribution_wizard

sale_extension/wizard/cost_distribution_wizard.py

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+from odoo import models, fields, api
+from odoo.exceptions import UserError
+
+class CostDistributionWizard(models.TransientModel):
+    _name = "cost.distribution.wizard"
+    _description = "A Wizard to distribute cost over other sales order lines."
+
+    order_line_id = fields.Many2one("sale.order.line", string="Order Line")
+    order_line_ids = fields.Many2many("sale.order.line", string="Order Lines")
+    order_line_cost = fields.Float(string="Cost to Distribute")
+    order_id = fields.Many2one("sale.order")
+    price_subtotal = fields.Float("Price Subtotal")
+
+    @api.model
+    def default_get(self, fields_list):
+        res = super(CostDistributionWizard, self).default_get(fields_list)
+        order_id = self.env.context.get("order_id")
+        default_order_line_id = self.env.context.get("default_order_line_id")
+        default_price_subtotal = self.env.context.get("default_price_subtotal", 0)
+
+        if order_id:
+            order = self.env["sale.order"].browse(order_id)
+            order_line_ids = order.order_line.ids
+            if default_order_line_id in order_line_ids:
+                order_line_ids.remove(default_order_line_id)
+
+            res.update({
+                "order_id": order_id,
+                "order_line_ids": [(6, 0, order_line_ids)],
+                "order_line_cost": default_price_subtotal,
+            })
+
+            distributed_cost = round(default_price_subtotal / len(order_line_ids), 2) if order_line_ids else 0
+            for line in self.env["sale.order.line"].browse(order_line_ids):
+                line.write({"distributed_cost": distributed_cost})
+
+        return res
+
+    def distribute_cost(self):
+        total_cost_distributed = sum(line.distributed_cost for line in self.order_line_ids)
+
+        if total_cost_distributed > self.price_subtotal:
+            raise UserError("Distributed price is greater than the distributable price.")
+
+        for line in self.order_line_ids:
+            line.price_subtotal += line.distributed_cost
+
+        original_order_line = self.env["sale.order.line"].browse(self.env.context.get("default_order_line_id"))
+        original_order_line.price_subtotal -= total_cost_distributed
+
+        if total_cost_distributed == original_order_line.price_subtotal:
+            pass

sale_extension/wizard/cost_distribution_wizard.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="cost_distribution_wizard" model="ir.ui.view">
+        <field name="name">cost.distribution.wizard.form</field>
+        <field name="model">cost.distribution.wizard</field>
+        <field name="arch" type="xml">
+            <form>
+                <sheet>
+                    <group style="text-align: right;">
+                        <field name="order_line_cost" readonly="1"/>
+                    </group>
+                    <field name="order_line_ids" invisible="price_subtotal == 0">
+                        <list editable="bottom">
+                            <field name="product_id" readonly="1" />
+                            <field name="price_subtotal" string="Current Cost" readonly="1" />
+                            <field name="distributed_cost" />
+                        </list>
+                    </field>
+                    <footer>
+                        <button string="Distribute" type="object" name="distribute_cost" class="btn-primary"/>
+                        <button string="Cancel" class="btn-secondary" special="cancel"/>
+                    </footer>
+                </sheet>
+            </form>
+        </field>
+    </record>
+</odoo>