[ADD] account_reversal_usability

This commit adds the account_reversal_usability module which purpose is to
improve the usability of the move line reverse functionality by adding:

* a field that allows tagging a move line as needing to be reversed.
  The value of the field gets automatically set to False once a reversed
  entry is made.
* a filter in the search view that allows selecting the moves that are
  flagged as needing to be reversed.
* the reverse move in the form view

account_reversal_usability/README.rst

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+==========================
+Account Reversal Usability
+==========================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:8b502ce8cfa5dece8b35d1663dc4e88804b5b55dca7650403dc67286aeb197ab
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/licence-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Faccount--financial--tools-lightgray.png?logo=github
+    :target: https://github.com/OCA/account-financial-tools/tree/16.0/account_reversal_usability
+    :alt: OCA/account-financial-tools
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/account-financial-tools-16-0/account-financial-tools-16-0-account_reversal_usability
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
+    :target: https://runboat.odoo-community.org/builds?repo=OCA/account-financial-tools&target_branch=16.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+This module purpose is to improve the usability of the move line reverse functionality by adding:
+
+* a field that allows tagging a move line as needing to be reversed. The value of the field gets automatically set to False once a reversed entry is made.
+* a filter in the search view that allows selecting the moves that are flagged as needing to be reversed.
+* the reverse move in the form view
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/account-financial-tools/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/account-financial-tools/issues/new?body=module:%20account_reversal_usability%0Aversion:%2016.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+~~~~~~~
+
+* ACSONE SA/NV
+
+Contributors
+~~~~~~~~~~~~
+
+* Stéphane Bidoul <[email protected]>
+* Laurent Stukkens <[email protected]>
+
+Maintainers
+~~~~~~~~~~~
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+This module is part of the `OCA/account-financial-tools <https://github.com/OCA/account-financial-tools/tree/16.0/account_reversal_usability>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

account_reversal_usability/__init__.py

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+from . import models

account_reversal_usability/__manifest__.py

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+# Copyright 2023 ACSONE SA/NV
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+{
+    "name": "Account Reversal Usability",
+    "summary": """
+        This module purpose is to improve the usability of the move line reverse functionality
+        by adding:
+
+            * a field that allows tagging a move line as needing to be reversed. The value of
+              the field gets automatically set to False once a reversed entry is made.
+            * a filter in the search view that allows selecting the moves that are flagged as
+              needing to be reversed.
+            * the reverse move in the form view""",
+    "version": "16.0.1.0.0",
+    "license": "AGPL-3",
+    "author": "ACSONE SA/NV,Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/account-financial-tools",
+    "depends": [
+        "account",
+    ],
+    "data": [
+        "views/account_move.xml",
+    ],
+    "demo": [],
+}

account_reversal_usability/models/__init__.py

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+from . import account_move

account_reversal_usability/models/account_move.py

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+# Copyright 2023 ACSONE SA/NV
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from setuptools.config._validate_pyproject import ValidationError
+
+from odoo import _, api, fields, models
+
+
+class MoveAlreadyReversedValidationError(ValidationError):
+    pass
+
+
+class AccountMove(models.Model):
+
+    _inherit = "account.move"
+
+    to_be_reversed = fields.Boolean(
+        compute="_compute_to_be_reversed",
+        copy=False,
+        default=False,
+        readonly=False,
+        store=True,
+    )
+    reversal_id = fields.Many2one(
+        "account.move", compute="_compute_reversal_id", string="Reversal Entry"
+    )
+
+    @api.depends("reversal_move_id")
+    def _compute_to_be_reversed(self):
+        # Although the field is stored, and as there is a default value,
+        # we don't need to provide a value for every record.
+        self.filtered("reversal_move_id").to_be_reversed = False
+
+    @api.depends("reversal_move_id")
+    def _compute_reversal_id(self):
+        for move in self:
+            move.reversal_id = move._get_reversal_id()
+
+    @api.constrains("to_be_reversed", "reversal_move_id")
+    def check_to_be_reversed(self):
+        for move in self:
+            if move.to_be_reversed and move._get_reversal_id():
+                raise MoveAlreadyReversedValidationError(
+                    _(
+                        "The move has already been reversed, "
+                        "so you are not allowed to mark it as to be reversed."
+                    )
+                )
+
+    def _get_reversal_id(self):
+        # Although theoretically a o2o, reversal_move_id is technically a o2m,
+        # which does not prevent having more than one record. That is why we are using
+        # a slicing in order to get the first record or an empty recordset.
+        self.ensure_one()
+        return self.reversal_move_id[:1]

account_reversal_usability/readme/CONTRIBUTORS.rst

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+* Stéphane Bidoul <[email protected]>
+* Laurent Stukkens <[email protected]>

account_reversal_usability/readme/DESCRIPTION.rst

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+This module purpose is to improve the usability of the move line reverse functionality by adding:
+
+* a field that allows tagging a move line as needing to be reversed. The value of the field gets automatically set to False once a reversed entry is made.
+* a filter in the search view that allows selecting the moves that are flagged as needing to be reversed.
+* the reverse move in the form view