[FIX] account,snailmail_account: fix methods depends on env

Some methods were using the `self.env` to decide users/partners while
those methods can also be called from Cron, thus the user would end up to
be OdooBot instead of the partner that initiated the async sending.

closes odoo/odoo#157991

Signed-off-by: Laurent Smet (las) <las@odoo.com>

addons/account/wizard/account_move_send.py

@@ -142,6 +142,8 @@ class AccountMoveSend(models.TransientModel):
         self.ensure_one()
         return {
             'mail_template_id': self.mail_template_id.id,
+            'sp_partner_id': self.env.user.partner_id.id,
+            'sp_user_id': self.env.user.id,
             'download': self.checkbox_download,
             'send_mail': self.checkbox_send_mail,
         }
@@ -452,11 +454,12 @@ class AccountMoveSend(models.TransientModel):
     def _send_mail(self, move, mail_template, **kwargs):
         """ Send the journal entry passed as parameter by mail. """
         partner_ids = kwargs.get('partner_ids', [])
+        author_id = kwargs.pop('author_id')
 
         new_message = move\
             .with_context(
                 no_new_invoice=True,
-                mail_notify_author=self.env.user.partner_id.id in partner_ids,
+                mail_notify_author=author_id in partner_ids,
             ).message_post(
                 message_type='comment',
                 **kwargs,
@@ -503,6 +506,7 @@ class AccountMoveSend(models.TransientModel):
             'subject': move_data['mail_subject'],
             'partner_ids': move_data['mail_partner_ids'].ids,
             'attachments': mail_attachments,
+            'author_id': move_data['sp_partner_id'],
         }
 
     @api.model
@@ -707,7 +711,7 @@ class AccountMoveSend(models.TransientModel):
         if process_later:
             # Set sending information on moves
             for move in self.move_ids:
-                move.send_and_print_values = {'sp_partner_id': self.env.user.partner_id.id, **self._get_wizard_values()}
+                move.send_and_print_values = self._get_wizard_values()
             self.env.ref('account.ir_cron_account_move_send')._trigger()
             return {
                 'type': 'ir.actions.client',

addons/snailmail_account/wizard/account_move_send.py

@@ -67,7 +67,6 @@ class AccountMoveSend(models.TransientModel):
             'partner_id': move.partner_id.id,
             'model': 'account.move',
             'res_id': move.id,
-            'user_id': self.env.user.id,
             'company_id': move.company_id.id,
             'report_template': self.env['ir.actions.report']._get_report('account.account_invoices').id
         }
@@ -77,16 +76,17 @@ class AccountMoveSend(models.TransientModel):
         # EXTENDS 'account'
         super()._hook_if_success(moves_data, from_cron=from_cron, allow_fallback_pdf=allow_fallback_pdf)
 
-        moves = self.env['account.move']
-        for move, move_data in moves_data.items():
-            if move_data.get('send_by_post') and move.invoice_pdf_report_id:
-                moves |= move
-        if not moves:
-            return
-
-        self.env['snailmail.letter']\
-            .create([
-                self._prepare_snailmail_letter_values(move)
-                for move in moves
+        to_send = {
+            move: move_data
+            for move, move_data in moves_data.items()
+            if move_data.get('send_by_post') and move.invoice_pdf_report_id
+        }
+        if to_send:
+            self.env['snailmail.letter'].create([
+                {
+                    'user_id': move_data.get('sp_user_id', self.env.user.id),
+                    **self._prepare_snailmail_letter_values(move),
+                }
+                for move, move_data in to_send.items()
             ])\
             ._snailmail_print(immediate=False)