[WEB-5917] fix: generate clean plain text from HTML email template #8535

apps/api/plane/utils/email.py

@@ -0,0 +1,42 @@
+# SPDX-FileCopyrightText: 2023-present Plane Software, Inc.
+# SPDX-License-Identifier: LicenseRef-Plane-Commercial
+#
+# Licensed under the Plane Commercial License (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# https://plane.so/legals/eula
+#
+# DO NOT remove or modify this notice.
+# NOTICE: Proprietary and confidential. Unauthorized use or distribution is prohibited.
+
+# Python imports
+import re
+
+# Django imports
+from django.utils.html import strip_tags
+
+
+def generate_plain_text_from_html(html_content):
+    """
+    Generate clean plain text from HTML email template.
+    Removes all HTML tags, CSS styles, and excessive whitespace.
+
+    Args:
+        html_content (str): The HTML content to convert to plain text
+
+    Returns:
+        str: Clean plain text without HTML tags, styles, or excessive whitespace
+    """
+    # Remove style tags and their content
+    html_content = re.sub(r"<style[^>]*>.*?</style>", "", html_content, flags=re.DOTALL | re.IGNORECASE)
+
+    # Strip HTML tags
+    text_content = strip_tags(html_content)
+
+    # Remove excessive empty lines
+    text_content = re.sub(r"\n\s*\n\s*\n+", "\n\n", text_content)
+
+    # Ensure there's a leading and trailing whitespace
+    text_content = "\n\n" + text_content.lstrip().rstrip() + "\n\n"
+
+    return text_content