Add new module for monthly recurring invoices, on month's last day (#25)

[ADD] contract_recurring_invoicing_monthly_last_day

New module for monthly recurring invoices, on month's last day

contract_recurring_invoicing_monthly_last_day/models/contract.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+# © 2016 Binovo IT Human Project SL <elacunza@binovo.es>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+from openerp import models, fields, api
+from dateutil.relativedelta import relativedelta
+import datetime
+import time
+
+
+class AccountAnalyticAccount(models.Model):
+    _inherit = 'account.analytic.account'
+
+    recurring_rule_type = fields.Selection(
+        selection_add=[('monthlylastday', 'Month(s) - Last day')])
+
+    @api.multi
+    def _recurring_create_invoice(self, automatic=False):
+        invoice_ids = []
+        current_date = time.strftime('%Y-%m-%d')
+        if self.ids:
+            contracts = self
+        else:
+            contracts = self.search(
+                [('recurring_next_date', '<=', current_date),
+                 ('state', '=', 'open'),
+                 ('recurring_invoices', '=', True),
+                 ('type', '=', 'contract')])
+        for contract in contracts:
+            is_monthlylastday = False
+            orig_next_date = contract.recurring_next_date
+            if contract.recurring_rule_type == 'monthlylastday':
+                is_monthlylastday = True
+                contract.recurring_rule_type = 'monthly'
+            try:
+                invoice_ids.append(super(AccountAnalyticAccount, contract)
+                                   ._recurring_create_invoice(automatic))
+            finally:
+                if is_monthlylastday:
+                    contract.recurring_rule_type = 'monthlylastday'
+            # Note: recurring_next_day has been already incremented by super if
+            # invoice was created. Adjust it to month's last day
+            if is_monthlylastday \
+                    and contract.recurring_next_date != orig_next_date:
+                next_date = datetime.datetime.strptime(
+                    contract.recurring_next_date,
+                    "%Y-%m-%d")
+                new_date = next_date + relativedelta(day=31)
+                contract.write(
+                    {'recurring_next_date': new_date.strftime('%Y-%m-%d')})
+        return invoice_ids