Add oca-purchase submodule with 96 purchase modules moved from oca-workflow-process

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

odoo-bringout-oca-purchase-workflow-supplier_calendar/supplier_calendar/models/res_partner.py

@@ -0,0 +1,53 @@
+# Copyright 2020 ForgeFlow S.L.
+# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl.html).
+
+from datetime import datetime, timedelta
+
+from odoo import api, fields, models
+
+
+class ResPartner(models.Model):
+    _inherit = "res.partner"
+
+    factory_calendar_id = fields.Many2one(comodel_name="resource.calendar")
+    delay_calendar_type = fields.Selection(
+        [("natural", "Natural days"), ("supplier_calendar", "Supplier Calendar")],
+        default="natural",
+        required=True,
+    )
+
+    @api.onchange("delay_calendar_type")
+    def _onchange_delay_calendar_type(self):
+        for rec in self:
+            if rec.delay_calendar_type == "natural":
+                rec.factory_calendar_id = False
+
+    def supplier_plan_days(self, date_from, delta):
+        """Helper method to calculate supplier delay based on its
+        working days (if set).
+
+        :param datetime date_from: reference date.
+        :param integer delta: delay established.
+        :return: datetime: resulting date.
+        """
+        self.ensure_one()
+        if isinstance(delta, float):
+            delta = round(delta)
+        if not isinstance(date_from, datetime):
+            date_from = fields.Datetime.to_datetime(date_from)
+        if delta == 0:
+            return date_from
+        if self.factory_calendar_id:
+            if delta < 0:
+                # We force the date planned to be at the beginning of the day.
+                # So no work intervals are found in the reference date.
+                dt_planned = date_from.replace(hour=0)
+            else:
+                # We force the date planned at the end of the day.
+                dt_planned = date_from.replace(hour=23)
+            date_result = self.factory_calendar_id.plan_days(
+                delta, dt_planned, compute_leaves=True
+            )
+        else:
+            date_result = date_from + timedelta(days=delta)
+        return date_result