From 8b11c16d1a7462089de00dc8759e7bb1d253ed08 Mon Sep 17 00:00:00 2001
From: Munyoki Kilyungi
Date: Tue, 30 Apr 2024 13:01:49 +0300
Subject: Create a JWT token when querying a user's role an a resource.

* gn_auth/auth/authorisation/resources/views.py: Import time.
(get_user_roles_on_resource): Add a JWT bearer token to the
responses's header.

Signed-off-by: Munyoki Kilyungi <me@bonfacemunyoki.com>
---
 gn_auth/auth/authorisation/resources/views.py | 46 +++++++++++++++++++++------
 1 file changed, 36 insertions(+), 10 deletions(-)

diff --git a/gn_auth/auth/authorisation/resources/views.py b/gn_auth/auth/authorisation/resources/views.py
index 58adaa2..0200222 100644
--- a/gn_auth/auth/authorisation/resources/views.py
+++ b/gn_auth/auth/authorisation/resources/views.py
@@ -3,12 +3,15 @@ import uuid
 import json
 import operator
 import sqlite3
+import time
 
 from dataclasses import asdict
 from functools import reduce
 
 from authlib.integrations.flask_oauth2.errors import _HTTPException
-from flask import request, jsonify, Response, Blueprint, current_app as app
+from authlib.jose import jwt
+from flask import (make_response, request, jsonify, Response,
+                   Blueprint, current_app as app)
 
 from gn_auth.auth.db import sqlite3 as db
 from gn_auth.auth.db.sqlite3 import with_db_connection
@@ -382,25 +385,48 @@ def get_user_roles_on_resource(name) -> Response:
     resid = with_db_connection(
         lambda conn: get_resource_id(conn, name)
     )
-
     def _extract_privilege_id(privileges):
         return tuple(
             p_.privilege_id for p_ in privileges
         )
 
     with require_oauth.acquire("profile resource") as _token:
-        _resources = with_db_connection(
+        resources_ = with_db_connection(
             lambda conn: user_roles_on_resources(
                 conn, _token.user, (resid,)
             )
         )
-        _roles = tuple(
-            _extract_privilege_id(role.privileges)
+        roles: list = reduce (operator.iconcat,
+                        tuple(
+                            _extract_privilege_id(role.privileges)
             for role in
-            _resources.get(
-                uuid.UUID(resid), {}
-            ).get("roles", tuple()))
-        return jsonify({
+                            resources_.get(
+                                uuid.UUID(resid), {}
+                            ).get("roles", tuple())), [])
+        response = make_response({
             # Flatten this list
-            "roles": reduce(operator.iconcat, _roles, [])
+            "roles": roles,
+            "silly": "ausah",
         })
+        iat = int(time.time())
+        jose_header = {
+            "alg": "RS256",
+            "typ": "jwt",
+            "cty": "json",
+        }
+        payload = {
+            # Registered Claims
+            "iss": request.url,  # Issuer Claim
+            "iat": iat,  # Issued At
+            "sub": name,  # Subject Claim
+            "aud": f"Edit {name}",  # Audience Claim
+            "exp": iat + 300,  # Expiration Time Claim
+            "jti": str(uuid.uuid4()),  # Unique Identifier for this token
+            # Private Claims
+            "account-name": _token.user.name,
+            "email": _token.user.email,
+            "roles": roles,
+        }
+        token = jwt.encode(jose_header, payload, app.config["SSL_PRIVATE_KEY"])
+        response.headers["Authorization"] = f"Bearer {token.decode('utf-8')}"
+        return response
-- 
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