[IMP] contract: Add contract modification

contract/models/__init__.py

@@ -6,6 +6,7 @@ from . import contract_template
 from . import contract
 from . import contract_template_line
 from . import contract_line
+from . import contract_modification
 from . import account_invoice
 from . import account_invoice_line
 from . import res_partner

contract/models/contract.py

@@ -123,6 +123,49 @@ class ContractContract(models.Model):
         copy=False,
         track_visibility="onchange",
     )
+    modification_ids = fields.One2many(
+        comodel_name='contract.modification',
+        inverse_name='contract_id',
+        string='Modifications',
+    )
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        records = super().create(vals_list)
+        records._set_start_contract_modification()
+        return records
+
+    @api.model
+    def _set_start_contract_modification(self):
+        for record in self:
+            if record.contract_line_ids:
+                date_start = min(record.contract_line_ids.mapped('date_start'))
+            else:
+                date_start = record.create_date
+            record.write({
+                'modification_ids': [
+                    (0, 0, {'date': date_start, 'description': _('Contract start')})
+                ]
+            })
+
+    @api.model
+    def _modification_mail_send(self):
+        modification_ids_not_sent = self.modification_ids.filtered(
+            lambda x: not x.sent
+        )
+        if modification_ids_not_sent:
+            contract_modification_subtype = self.sudo().env.ref(
+                'contract.mail_message_subtype_contract_modification'
+            )
+            notified_partners = self.message_follower_ids.filtered(
+                lambda x: contract_modification_subtype in x.subtype_ids
+            ).mapped('partner_id')
+            if notified_partners:
+                self.message_post_with_view(
+                    'mail.email_contract_modification_template',
+                    partner_ids=notified_partners.ids,
+                )
+            modification_ids_not_sent.write({'sent': True})
 
     @api.multi
     def _inverse_partner_id(self):

contract/models/contract_modification.py

@@ -0,0 +1,48 @@
+# Copyright 2020 Tecnativa - Víctor Martínez
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models
+
+
+class ContractModification(models.Model):
+
+    _name = 'contract.modification'
+    _description = 'Contract Modification'
+    _order = 'date desc'
+
+    date = fields.Date(
+        required=True,
+        string='Date'
+    )
+    description = fields.Text(
+        required=True,
+        string='Description'
+    )
+    contract_id = fields.Many2one(
+        string='Contract',
+        comodel_name='contract.contract',
+        required=True,
+        ondelete='cascade',
+        index=True
+    )
+    sent = fields.Boolean(
+        string='Sent',
+        default=False,
+        readonly=True,
+    )
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        records = super().create(vals_list)
+        records.check_modification_ids_need_sent()
+        return records
+
+    def write(self, vals):
+        res = super().write(vals)
+        self.check_modification_ids_need_sent()
+        return res
+
+    def check_modification_ids_need_sent(self):
+        records_not_sent = self.filtered(lambda x: not x.sent)
+        if records_not_sent:
+            records_not_sent.mapped('contract_id')._modification_mail_send()