Fix .gitignore, add secure pairing key route, and fix template errors

py_app/app/routes.py

@@ -1,3 +1,17 @@
+import json
+from flask import Blueprint
+bp = Blueprint('main', __name__)
+@bp.route('/get_pairing_keys')
+def get_pairing_keys():
+    """Return all pairing keys as JSON for client selection."""
+    keys_path = os.path.join(current_app.instance_path, 'pairing_keys.json')
+    try:
+        with open(keys_path, 'r') as f:
+            keys = json.load(f)
+    except Exception as e:
+        print(f"Error loading pairing keys: {e}")
+        return jsonify({'success': False, 'error': str(e), 'pairing_keys': []}), 500
+    return jsonify({'success': True, 'pairing_keys': keys})
 import os
 import mariadb
 from datetime import datetime, timedelta
@@ -932,10 +946,65 @@ def upload_data():
 def print_module():
     return render_template('print_module.html')
 
+
+import secrets
+from datetime import datetime, timedelta
+
+@bp.route('/generate_pairing_key', methods=['POST'])
+def generate_pairing_key():
+    """Generate a secure pairing key for a printer and store it."""
+    printer_name = request.form.get('printer_name', '').strip()
+    if not printer_name:
+        flash('Printer name is required.', 'danger')
+        return redirect(url_for('main.download_extension'))
+
+    # Generate a secure random key
+    pairing_key = secrets.token_urlsafe(32)
+    warranty_until = (datetime.utcnow() + timedelta(days=365)).strftime('%Y-%m-%d')
+
+    # Load existing keys
+    keys_path = os.path.join(current_app.instance_path, 'pairing_keys.json')
+    try:
+        if os.path.exists(keys_path):
+            with open(keys_path, 'r') as f:
+                keys = json.load(f)
+        else:
+            keys = []
+    except Exception as e:
+        keys = []
+
+    # Add new key
+    keys.append({
+        'printer_name': printer_name,
+        'pairing_key': pairing_key,
+        'warranty_until': warranty_until
+    })
+
+    # Save updated keys
+    with open(keys_path, 'w') as f:
+        json.dump(keys, f, indent=2)
+
+    # Pass new key and all keys to template
+    return render_template('download_extension.html',
+                           pairing_key=pairing_key,
+                           printer_name=printer_name,
+                           warranty_until=warranty_until,
+                           pairing_keys=keys)
+
 @bp.route('/download_extension')
 def download_extension():
     """Route for downloading the Chrome extension"""
-    return render_template('download_extension.html')
+    # Load all pairing keys for display
+    keys_path = os.path.join(current_app.instance_path, 'pairing_keys.json')
+    try:
+        if os.path.exists(keys_path):
+            with open(keys_path, 'r') as f:
+                keys = json.load(f)
+        else:
+            keys = []
+    except Exception as e:
+        keys = []
+    return render_template('download_extension.html', pairing_keys=keys)
 
 @bp.route('/extension_files/<path:filename>')
 def extension_files(filename):