[ADD] membership_custom_date

This module is needed for memberships that have a custom date range for
every individual.

The normal workflow when clicking on 'Buy Membership' does not involve
specifying the start and end dates. Rather, those dates are calculated
from the membership product. This calculation happens _after_ clicking
on 'Invoice Membership' in the wizard UI.

If we want to include the dates in the wizard UI, we disrupt this
workflow, and override the default behaviour of using the dates
configured in the membership product.

We circumvent this by only breaking the workflow for membership products
of type 'custom', which would be expected. We keep the workflow for
other types.

An alternative method is to calculate the dates from the product
selected in the wizard (onchange), but this is UX-wise incompatible with
the a downstream (non-OCA) requirement that the dates be changed to the
dates specified on another model (also onchange). So depending on which
field you changed last (product or project); that's the dates you get.
This is strange and unexpected behaviour.

Signed-off-by: Carmen Bianca BAKKER <[email protected]>

membership_custom_date/README.rst

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+===========================
+Custom date for memberships
+===========================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:1408ca166babe4521d36b67e7ebf366a2d53122b83aec7ca454397aed5a3163d
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |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%2Fvertical--association-lightgray.png?logo=github
+    :target: https://github.com/OCA/vertical-association/tree/16.0/membership_custom_date
+    :alt: OCA/vertical-association
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/vertical-association-16-0/vertical-association-16-0-membership_custom_date
+    :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/vertical-association&target_branch=16.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+Memberships with custom dates have their dates specified on a
+subscription-by-subscription basis.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/vertical-association/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/vertical-association/issues/new?body=module:%20membership_custom_date%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
+~~~~~~~
+
+* Coop IT Easy SC
+
+Contributors
+~~~~~~~~~~~~
+
+* `Coop IT Easy SC <https://coopiteasy.be>`_:
+
+  * Carmen Bianca Bakker
+
+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.
+
+.. |maintainer-carmenbianca| image:: https://github.com/carmenbianca.png?size=40px
+    :target: https://github.com/carmenbianca
+    :alt: carmenbianca
+
+Current `maintainer <https://odoo-community.org/page/maintainer-role>`__:
+
+|maintainer-carmenbianca| 
+
+This module is part of the `OCA/vertical-association <https://github.com/OCA/vertical-association/tree/16.0/membership_custom_date>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

membership_custom_date/__init__.py

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+# SPDX-FileCopyrightText: 2022 Coop IT Easy SC
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+from . import models
+from . import wizard

membership_custom_date/__manifest__.py

@@ -0,0 +1,27 @@
+# SPDX-FileCopyrightText: 2022 Coop IT Easy SC
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+{
+    "name": "Custom date for memberships",
+    "summary": """
+        Memberships with custom dates have their dates specified on a
+        subscription-by-subscription basis.""",
+    "version": "16.0.1.0.0",
+    "category": "Association",
+    "website": "https://github.com/OCA/vertical-association",
+    "author": "Coop IT Easy SC, Odoo Community Association (OCA)",
+    "maintainers": ["carmenbianca"],
+    "license": "AGPL-3",
+    "application": False,
+    "depends": [
+        "membership_extension",
+        "membership_type",
+    ],
+    "excludes": [],
+    "data": [
+        "wizard/membership_invoice_views.xml",
+    ],
+    "demo": [],
+    "qweb": [],
+}

membership_custom_date/i18n/fr.po

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* membership_custom_date
+# Carmen Bianca Bakker <[email protected]>, 2022.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 16.0beta\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: \n"
+"PO-Revision-Date: 2022-10-04 14:34+0200\n"
+"Last-Translator: Carmen Bianca Bakker <[email protected]>\n"
+"Language-Team: French <[email protected]>\n"
+"Language: fr\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+"X-Generator: Poedit 3.0.1\n"
+
+#. module: membership_custom_date
+#: model:ir.model.fields.selection,name:membership_custom_date.selection__product_template__membership_type__custom
+msgid "Custom dates"
+msgstr "Dates personnalisées"
+
+#. module: membership_custom_date
+#: model:ir.model.fields,field_description:membership_custom_date.field_membership_invoice__date_to
+msgid "End Date"
+msgstr "Date de fin"
+
+#. module: membership_custom_date
+#: model:ir.model,name:membership_custom_date.model_membership_invoice
+msgid "Membership Invoice"
+msgstr "Facture d'adhésion"
+
+#. module: membership_custom_date
+#: model:ir.model.fields,field_description:membership_custom_date.field_membership_invoice__product_id_type
+#: model:ir.model.fields,field_description:membership_custom_date.field_product_product__membership_type
+#: model:ir.model.fields,field_description:membership_custom_date.field_product_template__membership_type
+msgid "Membership Type"
+msgstr "Type d'adhésion"
+
+#. module: membership_custom_date
+#: model:ir.model,name:membership_custom_date.model_product_template
+msgid "Product"
+msgstr "Produit"
+
+#. module: membership_custom_date
+#: model:ir.model.fields,field_description:membership_custom_date.field_membership_invoice__date_from
+msgid "Start Date"
+msgstr "Date de début"

membership_custom_date/i18n/membership_custom_date.pot

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* membership_custom_date
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 16.0\n"
+"Report-Msgid-Bugs-To: \n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: membership_custom_date
+#: model:ir.model,name:membership_custom_date.model_membership_invoice
+msgid "Membership Invoice"
+msgstr ""
+
+#. module: membership_custom_date
+#: model:ir.model,name:membership_custom_date.model_product_template
+msgid "Product"
+msgstr ""

membership_custom_date/models/__init__.py

@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2022 Coop IT Easy SC
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+from . import product_template

membership_custom_date/models/product_template.py

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+# SPDX-FileCopyrightText: 2022 Coop IT Easy SC
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+from odoo import api, fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = "product.template"
+
+    membership_type = fields.Selection(
+        selection_add=[
+            ("custom", "Custom dates"),
+        ],
+        ondelete={"custom": "set default"},
+    )
+
+    @api.model
+    def _correct_vals_membership_type(self, vals):
+        vals = super()._correct_vals_membership_type(vals)
+        if vals.get("membership_type") == "custom":
+            vals["membership_date_from"] = vals["membership_date_to"] = False
+        return vals

membership_custom_date/readme/CONTRIBUTORS.rst

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+* `Coop IT Easy SC <https://coopiteasy.be>`_:
+
+  * Carmen Bianca Bakker

membership_custom_date/readme/DESCRIPTION.rst

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+Memberships with custom dates have their dates specified on a
+subscription-by-subscription basis.