[IMP] Allow to attach from compose wizard

By default we checked for an empty data dict in _get_report_values
however the mail template sends a file type and editor key by default.

We now check if the required company_id is in the dictionary. We also support
supplying force_company in context for setting the company for auto generated
emails.

partner_statement/report/activity_statement.py

@@ -138,9 +138,11 @@ class ActivityStatement(models.AbstractModel):
     @api.multi
     def _get_report_values(self, docids, data):
         if not data:
+            data = {}
+        if 'company_id' not in data:
             wiz = self.env["activity.statement.wizard"].with_context(
                 active_ids=docids, model="res.partner"
             )
-            data = wiz.create({})._prepare_statement()
+            data.update(wiz.create({})._prepare_statement())
         data['amount_field'] = 'amount'
         return super()._get_report_values(docids, data)

partner_statement/report/outstanding_statement.py

@@ -117,9 +117,11 @@ class OutstandingStatement(models.AbstractModel):
     @api.multi
     def _get_report_values(self, docids, data):
         if not data:
+            data = {}
+        if 'company_id' not in data:
             wiz = self.env["outstanding.statement.wizard"].with_context(
                 active_ids=docids, model="res.partner"
             )
-            data = wiz.create({})._prepare_statement()
+            data.update(wiz.create({})._prepare_statement())
         data['amount_field'] = 'open_amount'
         return super()._get_report_values(docids, data)

partner_statement/wizard/statement_common.py

@@ -10,10 +10,17 @@ class StatementCommon(models.AbstractModel):
     _name = 'statement.common.wizard'
     _description = 'Statement Reports Common Wizard'
 
+    def _get_company(self):
+        return (
+            self.env['res.company'].browse(
+                self.env.context.get('force_company')) or
+            self.env.user.company_id
+        )
+
     name = fields.Char()
     company_id = fields.Many2one(
         comodel_name='res.company',
-        default=lambda self: self.env.user.company_id,
+        default=_get_company,
         string='Company',
         required=True,
     )