[18.0][ADD] mail_composer_cc_bcc_mail_tracking: Show recipients of messages in chatter

mail_composer_cc_bcc_mail_tracking/README.rst

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+================================
+Email CC and BCC - Mail Tracking
+================================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:9bb139a8dbb259124cce7e434cd4dd8bb1248d51cc15b6d5f31af3a81e8684bd
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Alpha-red.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Alpha
+.. |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%2Fmail-lightgray.png?logo=github
+    :target: https://github.com/OCA/mail/tree/18.0/mail_composer_cc_bcc_mail_tracking
+    :alt: OCA/mail
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/mail-18-0/mail-18-0-mail_composer_cc_bcc_mail_tracking
+    :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/mail&target_branch=18.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+Glue module between
+
+- `mail_composer_cc_bcc <../mail_composer_cc_bcc>`__
+- `mail_tracking <../mail_tracking>`__.
+
+It shows, in the chatter, which recipients were in To, Cc and Bcc for
+each sent message, reusing mail_tracking's clickable recipient widget.
+
+Features
+--------
+
+- The "To" line rendered by mail_tracking becomes collapsible:
+
+  - shows all recipients
+  - expanding it splits them into To / Cc / Bcc
+
+- Global setting to choose which one is the default (collapsed or
+  expanded)
+- Global setting to choose whether or not we can collapse from one mode
+  to the other
+
+.. IMPORTANT::
+   This is an alpha version, the data model and design can change at any time without warning.
+   Only for development or testing purpose, do not use in production.
+   `More details on development status <https://odoo-community.org/page/development-status>`_
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/mail/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/mail/issues/new?body=module:%20mail_composer_cc_bcc_mail_tracking%0Aversion:%2018.0%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
+-------
+
+* Camptocamp
+
+Contributors
+------------
+
+- `Camptocamp <https://www.camptocamp.com>`__:
+
+  - David Gallay <david.gallay@camptocamp.com>
+
+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/mail <https://github.com/OCA/mail/tree/18.0/mail_composer_cc_bcc_mail_tracking>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

mail_composer_cc_bcc_mail_tracking/__init__.py

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+from . import models

mail_composer_cc_bcc_mail_tracking/__manifest__.py

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+# Copyright 2026 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+{
+    "name": "Email CC and BCC - Mail Tracking",
+    "summary": "Show Cc/Bcc recipients below the To line in the chatter.",
+    "version": "18.0.1.0.0",
+    "development_status": "Alpha",
+    "category": "Social",
+    "website": "https://github.com/OCA/mail",
+    "author": "Camptocamp, Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "application": False,
+    "installable": True,
+    "auto_install": True,
+    "depends": [
+        "mail_composer_cc_bcc",
+        "mail_tracking",
+    ],
+    "data": [
+        "views/res_config_settings_views.xml",
+    ],
+    "assets": {
+        "web.assets_backend": [
+            "mail_composer_cc_bcc_mail_tracking/static/src/message_model.esm.js",
+            "mail_composer_cc_bcc_mail_tracking/static/src/message.esm.js",
+            "mail_composer_cc_bcc_mail_tracking/static/src/message.xml",
+        ],
+    },
+}

mail_composer_cc_bcc_mail_tracking/models/__init__.py

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+from . import res_company
+from . import res_config_settings
+from . import mail_message

mail_composer_cc_bcc_mail_tracking/models/mail_message.py

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+# Copyright 2026 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+from odoo.addons.mail.tools.discuss import Store
+
+
+class MailMessage(models.Model):
+    _inherit = "mail.message"
+
+    def tracking_status(self):
+        res = super().tracking_status()
+
+        # Flag each recipient as Cc/Bcc using the
+        # partner-based recipient_cc_ids / recipient_bcc_ids
+        # (authoritative, set by the mail composer).
+        # Recipients themselves are already listed
+        # by super() through notified_partner_ids.
+        to_ids = set(self.partner_ids.ids)
+        cc_ids = set(self.recipient_cc_ids.ids)
+        bcc_ids = set(self.recipient_bcc_ids.ids)
+        for tracking in res:
+            pid = tracking.get("partner_id")
+            is_cc = pid in cc_ids
+            is_bcc = pid in bcc_ids
+            # A recipient is "To" when explicitly in partner_ids, or when it is
+            # neither Cc nor Bcc (followers / notified partners). A partner may
+            # belong to several lists at once.
+            tracking.update(
+                {
+                    "isTo": pid in to_ids or not (is_cc or is_bcc),
+                    "isCc": is_cc,
+                    "isBcc": is_bcc,
+                }
+            )
+        return res
+
+    def _recipients_display_company(self):
+        """Company whose settings drive the chatter recipients display."""
+        self.ensure_one()
+        return self.record_company_id or self.env.company
+
+    def _recipients_default_expanded(self):
+        """Whether the To/Cc/Bcc split is shown by default (else single 'To')."""
+        self.ensure_one()
+        company = self._recipients_display_company()
+        return company.chatter_recipients_default_display == "expanded"
+
+    def _recipients_allow_toggle(self):
+        """Whether the user may switch between the collapsed and expanded views."""
+        self.ensure_one()
+        return self._recipients_display_company().chatter_recipients_allow_toggle
+
+    def _extras_to_store(self, store: Store, format_reply):
+        res = super()._extras_to_store(store, format_reply=format_reply)
+        for message in self:
+            store.add(
+                message,
+                {
+                    "recipientsDefaultExpanded": message._recipients_default_expanded(),
+                    "recipientsAllowToggle": message._recipients_allow_toggle(),
+                },
+            )
+        return res

mail_composer_cc_bcc_mail_tracking/models/res_company.py

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+# Copyright 2026 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class ResCompany(models.Model):
+    _inherit = "res.company"
+
+    chatter_recipients_default_display = fields.Selection(
+        selection=[
+            ("collapsed", "Single 'To' line"),
+            ("expanded", "To / Cc / Bcc split"),
+        ],
+        string="Default recipient display",
+        default="collapsed",
+        required=True,
+        help="How chatter recipients are shown by default: a single collapsed "
+        "'To' line, or the full To/Cc/Bcc split.",
+    )
+    chatter_recipients_allow_toggle = fields.Boolean(
+        string="Allow toggling chatter recipients",
+        default=True,
+        help="Let users switch between the single 'To' line and the full "
+        "To/Cc/Bcc display. When disabled, only the default display is shown.",
+    )

mail_composer_cc_bcc_mail_tracking/models/res_config_settings.py

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+# Copyright 2026 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class ResConfigSettings(models.TransientModel):
+    _inherit = "res.config.settings"
+
+    chatter_recipients_default_display = fields.Selection(
+        related="company_id.chatter_recipients_default_display",
+        readonly=False,
+        required=True,
+    )
+    chatter_recipients_allow_toggle = fields.Boolean(
+        related="company_id.chatter_recipients_allow_toggle",
+        readonly=False,
+    )

mail_composer_cc_bcc_mail_tracking/pyproject.toml

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+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"

mail_composer_cc_bcc_mail_tracking/readme/CONTRIBUTORS.md

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+- [Camptocamp](https://www.camptocamp.com):
+  - David Gallay \<<david.gallay@camptocamp.com>\>

mail_composer_cc_bcc_mail_tracking/readme/DESCRIPTION.md

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+Glue module between
+- [mail_composer_cc_bcc](../mail_composer_cc_bcc)
+- [mail_tracking](../mail_tracking).
+
+It shows, in the chatter, which recipients were in To, Cc and Bcc for each
+sent message, reusing mail_tracking's clickable recipient widget.
+
+## Features
+
+- The "To" line rendered by mail_tracking becomes collapsible:
+  - shows all recipients
+  - expanding it splits them into To / Cc / Bcc
+- Global setting to choose which one is the default (collapsed or expanded)
+- Global setting to choose whether or not we can collapse from one mode to the other