From 2fe976831201b64b641ff47ded1ae07d3b844838 Mon Sep 17 00:00:00 2001
From: Igor Olszewski <iolszewski@soldevelo.com>
Date: Fri, 17 Apr 2026 12:01:21 +0200
Subject: [PATCH] feat: integrate Google Analytics tracking with configurable
 environment variable

---
 .env.sample                |  4 ++++
 app.py                     |  9 ++++++---
 reporter/html_generator.py |  3 ++-
 templates/index.html       | 11 +++++++++++
 4 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/.env.sample b/.env.sample
index 5874412..f03c57e 100644
--- a/.env.sample
+++ b/.env.sample
@@ -22,3 +22,7 @@ CLEANUP_SCANNED_IMAGES=true
 # SLACK_WEBHOOK_URL=https://hooks.slack.com/services/YOUR/WEBHOOK/URL
 SLACK_WEBHOOK_URL=
 
+
+# Google Analytics Tag ID (gtag.js)
+# Example: G-XXXXXXXXXX
+GOOGLE_TAG_ID=
diff --git a/app.py b/app.py
index 336522d..41d7de9 100644
--- a/app.py
+++ b/app.py
@@ -39,9 +39,12 @@
 os.makedirs(os.path.dirname(app.config['FEEDBACK_FILE']), exist_ok=True)
 
 @app.context_processor
-def inject_static_version():
-    """Make static version available in all templates for cache busting."""
-    return {'static_version': STATIC_VERSION}
+def inject_global_vars():
+    """Make global variables available in all templates."""
+    return {
+        'static_version': STATIC_VERSION,
+        'google_tag_id': os.getenv('GOOGLE_TAG_ID', '')
+    }
 
 def get_slack_webhook_url() -> str:
     return os.getenv('SLACK_WEBHOOK_URL', '').strip()
diff --git a/reporter/html_generator.py b/reporter/html_generator.py
index ab3992e..ae45e57 100644
--- a/reporter/html_generator.py
+++ b/reporter/html_generator.py
@@ -66,9 +66,10 @@ def generate_standalone_html(report_dict):
     js_pattern = r'<script[^>]*src=["\'].*?app\.js.*?["\'][^>]*>\s*</script>'
     html_content = re.sub(js_pattern, js_placeholder, html_content)
 
-    # Clean up ALL remaining Jinja tags (static_version etc)
+    # Clean up ALL remaining Jinja tags (static_version, google_tag_id etc)
     # This must happen before data injection
     html_content = re.sub(r'\{\{\s*.*?\s*\}\}', "", html_content)
+    html_content = re.sub(r'\{%\s*.*?\s*%\}', "", html_content)
     
     # NOW inject the JS content and the actual data
     # Use a safe way to build the script tag without f-string interpolation issues for JS content
diff --git a/templates/index.html b/templates/index.html
index 981df4f..b7bc87b 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -5,6 +5,17 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>InfraScan - Advanced Infrastructure Auditor</title>
+    {% if google_tag_id %}
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id={{ google_tag_id }}"></script>
+    <script>
+        window.dataLayer = window.dataLayer || [];
+        function gtag() { dataLayer.push(arguments); }
+        gtag('js', new Date());
+
+        gtag('config', '{{ google_tag_id }}');
+    </script>
+    {% endif %}
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap" rel="stylesheet">