[ADD] product_contract: Create module

* Add contract functionality to `product.templates`
* Add logic to create contracts from `sale.order` that contains contract products.

product_contract/models/__init__.py

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+# Copyright 2017 LasLabs Inc.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from . import product_template
+from . import sale_order
+from . import sale_order_line

product_contract/models/product_template.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+# Copyright 2017 LasLabs Inc.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo import api, fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    is_contract = fields.Boolean('Is a contract')
+    contract_template_id = fields.Many2one(
+        comodel_name='account.analytic.contract',
+        string='Contract Template',
+    )
+
+    @api.onchange('is_contract')
+    def _change_is_contract(self):
+        """ Clear the relation to contract_template_id when downgrading
+        product from contract
+        """
+        if not self.is_contract:
+            self.contract_template_id = False

product_contract/models/sale_order.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+# Copyright 2017 LasLabs Inc.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo import api, models
+
+
+class SaleOrder(models.Model):
+    _inherit = 'sale.order'
+
+    @api.multi
+    def action_confirm(self):
+        """ If we have a contract in the order, set it up """
+        for rec in self:
+            order_lines = self.mapped('order_line').filtered(
+                lambda r: r.product_id.is_contract
+            )
+            for line in order_lines:
+                contract_tmpl = line.product_id.contract_template_id
+                contract = self.env['account.analytic.account'].create({
+                    'name': '%s Contract' % rec.name,
+                    'partner_id': rec.partner_id.id,
+                    'contract_template_id': contract_tmpl.id,
+                })
+                line.contract_id = contract.id
+                contract.recurring_create_invoice()
+        return super(SaleOrder, self).action_confirm()

product_contract/models/sale_order_line.py

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+# Copyright 2017 LasLabs Inc.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from odoo import fields, models
+
+
+class SaleOrderLine(models.Model):
+    _inherit = 'sale.order.line'
+
+    contract_id = fields.Many2one(
+        comodel_name='account.analytic.account',
+        string='Contract'
+    )