[ADD] mail_external_cleaner

mail_external_cleaner/README.rst

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+.. image:: https://odoo-community.org/readme-banner-image
+   :target: https://odoo-community.org/get-involved?utm_source=readme
+   :alt: Odoo Community Association
+
+=====================
+Mail External Cleaner
+=====================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:1c85e0de80c033bfd956777cbb17624817cc912e71041b8bda835cbcc1d1b0ca
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |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/license-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/16.0/mail_external_cleaner
+    :alt: OCA/mail
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/mail-16-0/mail-16-0-mail_external_cleaner
+    :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=16.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+This module removes all the link images on the mail and replaces it by
+the source image.
+
+This has sense when Our Odoo instance is not open to our customers.
+
+Also removes portal headers and so on and keeps it only for internal
+users.
+
+**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_external_cleaner%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
+-------
+
+* Dixmit
+* CreuBlanca
+
+Contributors
+------------
+
+- `Dixmit <https://www.dixmit.com>`__
+
+  - Enric Tobella
+
+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/16.0/mail_external_cleaner>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

mail_external_cleaner/__init__.py

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+from . import models

mail_external_cleaner/__manifest__.py

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+# Copyright 2025 Dixmit
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+{
+    "name": "Mail External Cleaner",
+    "summary": """
+    Clean up email content by removing unnecessary external resources.
+    Makes sense for isolated environments with emails.
+    """,
+    "version": "16.0.1.0.0",
+    "license": "AGPL-3",
+    "author": "Dixmit,CreuBlanca,Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/mail",
+    "depends": [
+        "mail",
+        "portal",
+    ],
+    "data": [],
+    "demo": [],
+}

mail_external_cleaner/models/__init__.py

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+from . import mail_mail
+from . import mail_thread
+from . import ir_mail_server

mail_external_cleaner/models/ir_mail_server.py

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+import base64
+import itertools
+import mimetypes
+import re
+
+from odoo import models
+
+_DATA_URI_RE = re.compile(
+    r'src=(["\'])data:(?P<mime>[^;]+);base64,(?P<b64>[A-Za-z0-9+/=\s]+)\1',
+    re.IGNORECASE,
+)
+
+
+def extract_inline_images_from_html(html, existing_names=()):
+    """
+    Finds <img src="data:...base64,..."> and returns:
+      new_html, inline_attachments, inline_names
+    where:
+      - inline_attachments: list of (filename, bytes, mime) to append to your attachments
+      - inline_names: set of the filenames we generated (these will become CIDs)
+    """
+    counter = itertools.count(1)
+    existing = {n for n in existing_names if n}
+    inline_attachments = []
+    inline_names = set()
+
+    def repl(m):
+        mime = m.group("mime").strip().lower()
+        ext = mimetypes.guess_extension(mime) or ".bin"
+        # unique filename we’ll also use as the CID
+        while True:
+            name = f"inline-{next(counter)}{ext}"
+            if name not in existing:
+                break
+        b64 = re.sub(r"\s+", "", m.group("b64"))
+        data = base64.b64decode(b64)
+        inline_attachments.append((name, data, mime))
+        inline_names.add(name)
+        return f'src="cid:{name}"'  # noqa: E231
+
+    new_html = _DATA_URI_RE.sub(repl, html)
+    return new_html, inline_attachments, inline_names
+
+
+class IrMailServer(models.Model):
+    _inherit = "ir.mail_server"
+
+    def build_email(
+        self,
+        email_from,
+        email_to,
+        subject,
+        body,
+        email_cc=None,
+        email_bcc=None,
+        reply_to=False,
+        attachments=None,
+        message_id=None,
+        references=None,
+        object_id=False,
+        subtype="plain",
+        headers=None,
+        body_alternative=None,
+        subtype_alternative="plain",
+    ):
+        existing_names = [
+            a[0] for a in (attachments or []) if isinstance(a, (list, tuple)) and a
+        ]
+        if subtype == "html" and body:
+            body, inline_atts, inline_names = extract_inline_images_from_html(
+                body, existing_names
+            )
+        else:
+            inline_atts, inline_names = [], set()
+        # Append our inline attachments to your normal attachments (no function change)
+        attachments = (attachments or []) + inline_atts
+        msg = super().build_email(
+            email_from,
+            email_to,
+            subject,
+            body,
+            email_cc=email_cc,
+            email_bcc=email_bcc,
+            reply_to=reply_to,
+            attachments=attachments,
+            message_id=message_id,
+            references=references,
+            object_id=object_id,
+            subtype=subtype,
+            headers=headers,
+            body_alternative=body_alternative,
+            subtype_alternative=subtype_alternative,
+        )
+        for part in msg.iter_attachments():
+            fname = part.get_filename()
+            if fname and fname in inline_names:
+                # Content-ID used by <img src="cid:...">
+                if "Content-ID" in part:
+                    del part["Content-ID"]
+                part.add_header("Content-ID", f"<{fname}>")
+
+                # Inline disposition so clients don’t show them as regular downloads
+                if part.get("Content-Disposition"):
+                    part.replace_header(
+                        "Content-Disposition",
+                        f'inline; filename="{fname}"',  # noqa: E702
+                    )
+                else:
+                    part.add_header(
+                        "Content-Disposition",
+                        f'inline; filename="{fname}"',  # noqa: E702
+                    )
+
+                # Ensure base64 transfer encoding (usually already set by add_attachment)
+                cte = (part.get("Content-Transfer-Encoding") or "").lower()
+                if cte != "base64":
+                    payload = part.get_payload(decode=True)
+                    part.set_payload(base64.b64encode(payload).decode("ascii"))
+                    if cte:
+                        part.replace_header("Content-Transfer-Encoding", "base64")
+                    else:
+                        part.add_header("Content-Transfer-Encoding", "base64")
+        return msg

mail_external_cleaner/models/mail_mail.py

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+# Copyright 2025 Dixmit
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+import base64
+import io
+import re
+
+from odoo import models
+from odoo.tools.mimetypes import guess_mimetype
+
+IMAGE_REGEX = r"(\<img [\w\b =\-\":;,.%]*src=\")(https?:\/\/[\w.:]+)((?:\/[\w@:%.+&~#=\/-]+)?(?:\?\S+)?)(\"[\w\b =\-\":;,.%]+\/?\>)"  # noqa: B950
+
+
+class MailMail(models.Model):
+
+    _inherit = "mail.mail"
+
+    def _send_prepare_body(self):
+        body = super()._send_prepare_body()
+        return self._embed_images(body)
+
+    def _get_image_attachment(self, path):
+        if m := re.match(r"\/logo\.png\?company=(\d+)", path):
+            company = self.env["res.company"].browse(int(m.group(1)))
+            image_base64 = base64.b64decode(company.logo_web)
+            io.BytesIO(image_base64)
+            mimetype = guess_mimetype(image_base64, default="image/png")
+            imgext = "." + mimetype.split("/")[1]
+            if imgext == ".svg+xml":
+                imgext = ".svg"
+            return mimetype, company.logo_web.decode("utf-8")
+        if m := re.match(r"\/web\/image\/(\d+)", path):
+            image = self.env["ir.attachment"].browse(int(m.group(1)))
+            if image.exists():
+                return image.mimetype, image.datas.decode("utf-8")
+
+    def _embed_images(self, body):
+        base_url = (
+            self.env["ir.config_parameter"]
+            .sudo()
+            .get_param("web.base.url", default="http://localhost:8069")
+        )
+        for data in set(
+            re.findall(
+                IMAGE_REGEX,
+                body,
+            )
+        ):
+            pre_data, url, path, post_data = data
+            if url == base_url:
+                img_data = f"{pre_data}{url}{path}{post_data}"
+                attachment = self._get_image_attachment(path)
+                if attachment:
+                    body = body.replace(
+                        img_data,
+                        f"{pre_data}data:{attachment[0]};base64,{attachment[1]}{post_data}",  # noqa: E231, E702, B950
+                    )
+        return body

mail_external_cleaner/models/mail_thread.py

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+# Copyright 2025 Dixmit
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class MailThread(models.AbstractModel):
+
+    _inherit = "mail.thread"
+
+    def _notify_get_recipients_groups(self, msg_vals=None):
+        """
+        Override to disable portal customer button access in email notifications.
+        """
+        groups = super()._notify_get_recipients_groups(msg_vals=msg_vals)
+        for group, _group_func, group_vals in groups:
+            if group == "portal_customer":
+                group_vals["has_button_access"] = False
+        return groups

mail_external_cleaner/readme/CONTRIBUTORS.md

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+- [Dixmit](https://www.dixmit.com)
+  - Enric Tobella
+

mail_external_cleaner/readme/DESCRIPTION.md

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+This module removes all the link images on the mail and replaces it by the source image.
+
+This has sense when Our Odoo instance is not open to our customers.
+
+Also removes portal headers and so on and keeps it only for internal users.