[IMP] energy_selfconsumption: invoicing energy delivered

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Changelog

• [IMP] energy_selfconsumption: new wizard invoicing_wizard to manually generate the invoices for the energy delivered selfconsumption projects.
• [IMP] energy_selfconsumption: action to invoice energy delivered contracts, can only be applied to the same period (start and end)
• [IMP] energy_selfconsumption: view of contracts grouped by period (start and end)
• [IMP] energy_selfconsumption: contract io.cron will not get contracts related to energy delivered projects.
• [IMP] energy_selfconsumption: contract.contract will now save last period invoiced.

energy_selfconsumption/wizards/invoicing_wizard.py

@@ -7,6 +7,27 @@ class InvoicingWizard(models.TransientModel):
 
     power = fields.Float(string="Total Energy Generated (kWh)")
     contract_ids = fields.Many2many("contract.contract", readonly=True)
+    next_period_date_start = fields.Date(
+        string="Next Period Start",
+        compute="_compute_next_period_date_start_and_end",
+        readonly=True,
+    )
+    next_period_date_end = fields.Date(
+        string="Next Period End",
+        compute="_compute_next_period_date_start_and_end",
+        readonly=True,
+    )
+
+    @api.depends("contract_ids")
+    def _compute_next_period_date_start_and_end(self):
+        for record in self:
+            if len(record.contract_ids) > 0:
+                record.next_period_date_start = record.contract_ids[
+                    0
+                ].next_period_date_start
+                record.next_period_date_end = record.contract_ids[
+                    0
+                ].next_period_date_end
 
     @api.constrains("contract_ids")
     def constraint_contract_ids(self):