refactor: Restructure project into a scalable package layout

This commit undertakes a major architectural refactoring to improve project organization, scalability, and maintainability

interbend/auth.py

@@ -0,0 +1,35 @@
+from functools import wraps
+from flask import request, jsonify, current_app
+import jwt
+from datetime import datetime, timedelta, timezone
+
+def _getconfig():
+    jwt_key = current_app.config['JWT_KEY']
+    jwt_expire = current_app.config['JWT_EXPIRE']  # In days
+    return jwt_key, jwt_expire
+
+def jwt_required(f):
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        jwt_key, _ = _getconfig()
+        token = request.cookies.get("token")
+        if not token:
+            return jsonify({"error": "Authentication token missing"}), 400
+        try:
+            payload = jwt.decode(token, jwt_key, algorithms=["HS256"])
+            request.bid = payload["bid"]
+        except jwt.ExpiredSignatureError:
+            return jsonify({"error": "Token expired"}), 401
+        except jwt.InvalidTokenError:
+            return jsonify({"error": "Invalid token"}), 401
+        return f(*args, **kwargs)
+    return decorated_function
+
+def token_gen(bid):
+    jwt_key, jwt_expire = _getconfig()
+    exptime = datetime.now(timezone.utc) + timedelta(days=jwt_expire)
+    token = jwt.encode(
+        {"bid": bid, "exp": exptime},
+        jwt_key,
+        algorithm="HS256")
+    return token