add /api/v1/sim-cards GET endpoint

app.py

@@ -24,6 +24,8 @@ file_handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s: %(messag
 app.logger.addHandler(file_handler)
 app.logger.setLevel(logging.INFO)
 
+msg_403_not_primary = "Only a PRIMARY device can perform this action"
+
 
 @app.route("/api/v1/login", methods=["POST"])
 def login():
@@ -69,5 +71,19 @@ def refresh_token():
 @jwt_required()
 def get_all_devices():
     if get_jwt()["typ"] != "PRIMARY":
-        return make_response(jsonify(msg="Only a PRIMARY device can list all devices"), 403)
+        return make_response(jsonify(msg=msg_403_not_primary), 403)
     return make_response(jsonify([d.to_dict() for d in db.get_all_devices(cur)]), 200)
+
+
+@app.route("/api/v1/sim-cards", methods=["GET"])
+@jwt_required()
+def get_sim_cards_by_device():
+    if not is_primary(get_jwt()):
+        return make_response(jsonify(msg=msg_403_not_primary), 403)
+
+    access_key = request.args.get('access_key', None)
+    return make_response(jsonify([s.to_dict() for s in db.get_sim_cards_by_device(cur, access_key)]), 200)
+
+
+def is_primary(jwt):
+    return jwt["typ"] == "PRIMARY"