[ADD] unpublish_product: auto unpublish products when free_qty is zero

unpublish_product/__init__.py

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+from . import models

unpublish_product/__manifest__.py

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+{
+    "name": "auto unpublish product",
+    "version": "1.0.0",
+    "depends": ["base", "product", "website_sale", "stock"],
+    "author": "Mehul Kotak",
+    "category": "Task-3",
+    "description": "eCommerce",
+    "license": "LGPL-3",
+    "auto_install": True,
+    "installable": True,
+    "data": ["views/res_config_settings_view.xml"],
+}

unpublish_product/models/__init__.py

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+from . import res_config_settings
+from . import product_template
+from . import stock_quant

unpublish_product/models/product_template.py

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+from odoo import models
+
+
+class ProductTemplate(models.Model):
+    _inherit = "product.template"
+
+    def check_and_unpublish(self):
+        enabled = (
+            self.env["ir.config_parameter"]
+            .sudo()
+            .get_param("unpublish_product.auto_unpublish_out_of_stock")
+        )
+
+        if not enabled:
+            return
+
+        for template in self:
+            if all(variant.free_qty <= 0 for variant in template.product_variant_ids):
+                template.website_published = False

unpublish_product/models/res_config_settings.py

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+from odoo import fields, models
+
+
+class ResConfigSettings(models.TransientModel):
+    _inherit = "res.config.settings"
+
+    auto_unpublish_out_of_stock = fields.Boolean(
+        string="Auto Unpublish Out-of-Stock Products",
+        config_parameter="unpublish_product.auto_unpublish_out_of_stock",
+    )

unpublish_product/models/stock_quant.py

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+from odoo import models
+
+
+class StockQuant(models.Model):
+    _inherit = "stock.quant"
+
+    def write(self, vals):
+        res = super().write(vals)
+
+        products = self.mapped("product_id.product_tmpl_id")
+        products.check_and_unpublish()
+
+        return res

unpublish_product/views/res_config_settings_view.xml

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+<?xml version="1.0"?>
+<odoo>
+    <record id="res_config_settings_view_form" model="ir.ui.view">
+        <field name="name">res.config.settings.view.form.inherit</field>
+        <field name="model">res.config.settings</field>
+        <field name="inherit_id" ref="website_sale.res_config_settings_view_form"/>
+        <field name="arch" type="xml">
+
+            <setting id="product_attributes_setting" position="before">
+                <setting string="Unpublish out-of-stock products" id="unpublish_products" help="Unpublish/Republish product based on stock availability">
+                    <field name="auto_unpublish_out_of_stock"/>
+                </setting>
+            </setting>
+
+        </field>
+    </record>
+</odoo>