[ADD] add_product_warranty: allow adding warranty lines to sale orders

add_product_warranty/__init__.py

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+from . import models
+from . import wizard

add_product_warranty/__manifest__.py

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+{
+    "name": "Product Warranty",
+    "description": "Adds functionality to manage product warranties in sales orders and linking warranties to products",
+    "depends": ["sale_management"],
+    "data": [
+        "security/ir.model.access.csv",
+        "wizard/sale_order_add_warranty_views.xml",
+        "views/product_template_views.xml",
+        "views/sale_order_views.xml",
+        "views/warranty_configuration_views.xml",
+        "views/warranty_configuration_menus.xml",
+    ],
+    "installable": True,
+    "license": "LGPL-3",
+}

add_product_warranty/models/__init__.py

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+from . import warranty_configuration
+from . import product_template
+from . import sale_order_line
+from . import sale_order

add_product_warranty/models/product_template.py

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+from odoo import fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = "product.template"
+
+    is_warranty_available = fields.Boolean(
+        help="Indicates if the product has an associated warranty option.",
+    )

add_product_warranty/models/sale_order.py

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+from odoo import api, fields, models
+
+
+class SaleOrder(models.Model):
+    _inherit = "sale.order"
+
+    show_warranty_button = fields.Boolean(
+        string="Show Warranty Button",
+        compute="_compute_show_warranty_button",
+        store=True
+    )
+
+    @api.depends("order_line")
+    def _compute_show_warranty_button(self):
+        for order in self:
+            show_button = False
+            for line in order.order_line:
+                # Check if this product has warranty available
+                if line.product_template_id.is_warranty_available:
+                    # And there is no other line that links to this line as warranty
+                    linked_as_warranty = any(
+                        l.warranty_line_linked_with_so_line == line
+                        for l in order.order_line
+                    )
+                    if not linked_as_warranty:
+                        show_button = True
+                        break  # We can stop early if condition is satisfied
+
+            order.show_warranty_button = show_button
+
+    @api.onchange("order_line")
+    def _onchange_order_line(self):
+        original_line_ids = self._origin.order_line.ids
+
+        current_line_ids = self.order_line.ids
+
+        deleted_line_ids = list(set(original_line_ids) - set(current_line_ids))
+
+        if deleted_line_ids:
+            # Remove warranty lines linked to deleted lines
+            self.order_line = [
+                (
+                    6,
+                    0,
+                    self.order_line.filtered(
+                        lambda line: line.warranty_line_linked_with_so_line.id
+                        not in deleted_line_ids
+                    ).ids,
+                )
+            ]

add_product_warranty/models/sale_order_line.py

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+from odoo import fields, models
+
+
+class SaleOrderLine(models.Model):
+    _inherit = "sale.order.line"
+
+    warranty_line_linked_with_so_line = fields.Many2one(
+        "sale.order.line", ondelete="cascade"
+    )

add_product_warranty/models/warranty_configuration.py

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+from odoo import fields, models
+
+
+class WarrantyConfiguration(models.Model):
+    _name = "warranty.configuration"
+    _description = "Warranty configuration for all products"
+
+    name = fields.Char(required=True)
+    period = fields.Integer(
+        string="Warranty Period (years)",
+        default=1,
+        help="Duration of the warranty period in year.",
+    )
+    percentage = fields.Float(
+        required=True,
+        help="Percentage of the product price to be charged for the warranty.",
+    )
+    product_id = fields.Many2one(
+        comodel_name="product.product",
+        string="Product",
+        required=True,
+        help="Product used to represent the warranty service.",
+    )

add_product_warranty/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
+access_warranty_configuration,warranty.configuration,model_warranty_configuration,base.group_user,1,1,1,1
+access_sale_order_add_warranty,sale.order.add.warranty,model_sale_order_add_warranty,base.group_user,1,1,1,1
+access_sale_order_add_warranty_line,sale.order.add.warranty.line,model_sale_order_add_warranty_line,base.group_user,1,1,1,1

add_product_warranty/views/product_template_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="product_template_form_view" model="ir.ui.view">
+        <field name="name">product.template.form.view.inherit.add.prodcut.warranty</field>
+        <field name="model">product.template</field>
+        <field name="inherit_id" ref="product.product_template_form_view"/>
+        <field name="arch" type="xml">
+            <xpath expr="//page[@name='sales']" position="inside">
+                <group>
+                    <field name="is_warranty_available"/>
+                </group>
+            </xpath>
+        </field>
+    </record>
+</odoo>

add_product_warranty/views/sale_order_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="view_order_form" model="ir.ui.view">
+        <field name="name">view.order.form.inherit.add.product.warranty</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_order_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//page[@name='order_lines']//button[@name='action_open_discount_wizard']" position="before">
+                <button name="add_product_warranty.action_open_warranty_wizard" string="Add Warranty" 
+                class="btn btn-secondary" type="action" invisible="not show_warranty_button"/>
+            </xpath>
+        </field>
+    </record>
+</odoo>

add_product_warranty/views/warranty_configuration_menus.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <menuitem id="warranty_configuration_menu"
+        name="Warranty Configuration"
+        sequence="25"
+        parent="sale.menu_sale_config"
+        action="warranty_configuration_action"/>
+</odoo>

add_product_warranty/views/warranty_configuration_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="warranty_configuration_action" model="ir.actions.act_window">
+        <field name="name">Warranty Configuration</field>
+        <field name="res_model">warranty.configuration</field>
+        <field name="view_mode">list,form</field>
+        <field name="help" type="html">
+            <p class="o_view_nocontent_smiling_face">
+                Create a warranty
+            </p>
+            <p>
+                Create warranty configurations to manage product warranties effectively.
+            </p>
+        </field>
+    </record>
+
+    <record id="warranty_configuration_view_list" model="ir.ui.view">
+        <field name="name">warranty.configuration.view.list</field>
+        <field name="model">warranty.configuration</field>
+        <field name="arch" type="xml">
+            <list string="Warranty Configurations" editable="bottom">
+                <field name="name"/>
+                <field name="product_id"/>
+                <field name="percentage"/>
+                <field name="period"/>
+            </list>
+        </field>
+    </record>
+</odoo>

add_product_warranty/wizard/__init__.py

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+from . import sale_order_add_warranty_line
+from . import sale_order_add_warranty

add_product_warranty/wizard/sale_order_add_warranty.py

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+from odoo import api, Command, fields, models
+
+
+class SaleOrderAddWarranty(models.TransientModel):
+    _name = "sale.order.add.warranty"
+    _description = "Wizard to add warranty to sale order"
+
+    warranty_line_ids = fields.One2many(
+        comodel_name="sale.order.add.warranty.line",
+        inverse_name="wizard_id",
+        string="Warranty Lines",
+        help="Lines representing the warranties to be added to the sale order.",
+    )
+    sale_order_id = fields.Many2one(
+        comodel_name="sale.order",
+        string="Sale Order",
+        required=True,
+    )
+
+    @api.model
+    def default_get(self, fields):
+        res = super().default_get(fields)
+        sale_order = self.env["sale.order"].browse(self.env.context.get("active_id"))
+
+        warranty_lines = []
+        for line in sale_order.order_line:
+            has_warranty = (
+                self.env["sale.order.line"].search_count(
+                    [("warranty_line_linked_with_so_line", "=", line.id)]
+                )
+                > 0
+            )
+            if line.product_template_id.is_warranty_available and not has_warranty:
+                warranty_lines.append(
+                    {
+                        "sale_order_line_id": line.id,
+                        "product_id": line.product_id.id,
+                    }
+                )
+
+        res.update(
+            {
+                "sale_order_id": sale_order.id,
+                "warranty_line_ids": [Command.clear()]
+                + [Command.create(vals) for vals in warranty_lines],
+            }
+        )
+        return res
+
+    def action_add_warranty(self):
+        sale_order_lines = []
+        warranty_lines = self.warranty_line_ids.filtered(lambda l: l.warranty_id)
+
+        for line in warranty_lines:
+            sale_order_lines.append(
+                {
+                    "order_id": self.sale_order_id.id,
+                    "product_id": line.warranty_id.product_id.id,
+                    "name": f" Extended Warranty, \n End Date: {line.end_date}",
+                    "warranty_line_linked_with_so_line": line.sale_order_line_id.id,
+                    "price_unit": (
+                        line.sale_order_line_id.price_unit
+                        * line.warranty_id.percentage
+                        / 100
+                    ),
+                    "product_uom_qty": line.sale_order_line_id.product_uom_qty,
+                    "sequence": line.sale_order_line_id.sequence,
+                }
+            )
+        if sale_order_lines:
+            self.env["sale.order.line"].create(sale_order_lines)
+        return

add_product_warranty/wizard/sale_order_add_warranty_line.py

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+from datetime import timedelta
+
+from odoo import api, fields, models
+
+
+class SaleOrderAddWarrantyLine(models.TransientModel):
+    _name = "sale.order.add.warranty.line"
+    _description = "Line representing a warranty to be added to the sale order"
+
+    wizard_id = fields.Many2one(
+        comodel_name="sale.order.add.warranty",
+        required=True,
+        ondelete="cascade",
+    )
+    sale_order_line_id = fields.Many2one(
+        comodel_name="sale.order.line",
+        required=True,
+        ondelete="cascade",
+    )
+    product_id = fields.Many2one(
+        comodel_name="product.product",
+        string="Product",
+    )
+    warranty_id = fields.Many2one(
+        comodel_name="warranty.configuration",
+        string="Warranty Configuration",
+    )
+    end_date = fields.Date(
+        string="End Date",
+        compute="_compute_end_date",
+    )
+
+    @api.depends("warranty_id")
+    def _compute_end_date(self):
+        for record in self:
+            if record.warranty_id:
+                record.end_date = fields.Date.context_today(record) + timedelta(
+                    days=record.warranty_id.period * 365
+                )
+            else:
+                record.end_date = False

add_product_warranty/wizard/sale_order_add_warranty_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="action_open_warranty_wizard" model="ir.actions.act_window">
+        <field name="name">Add Warranty</field>
+        <field name="res_model">sale.order.add.warranty</field>
+        <field name="view_mode">form</field>
+        <field name="target">new</field>
+    </record> 
+
+    <record id="sale_order_add_warranty_view_form" model="ir.ui.view">
+        <field name="name">sale.order.add.warranty.view.form</field>
+        <field name="model">sale.order.add.warranty</field>
+        <field name="arch" type="xml">
+            <form string="Add Warranty">
+                <group>
+                    <field name="warranty_line_ids" nolabel="1">
+                        <list editable="bottom" create="0">
+                            <field name="sale_order_line_id" column_invisible="1"/>
+                            <field name="product_id" readonly="1"/>
+                            <field name="warranty_id" required="1"/>
+                            <field name="end_date" readonly="1"/>
+                        </list>
+                    </field>
+                </group>
+                <footer>
+                    <button string="Add" type="object" name="action_add_warranty" class="btn-primary"/>
+                    <button string="Cancel" class="btn-secondary" special="cancel"/>
+                </footer>
+            </form>
+        </field>
+    </record>
+</odoo>