From df77ee2436a23a17149c531af727018f8e01a7a5 Mon Sep 17 00:00:00 2001
From: Alex Root Junior <jroot.junior@gmail.com>
Date: Mon, 21 Aug 2023 02:22:39 +0300
Subject: [PATCH] #1277 Add custom types for datetime in Telegram API

This commit adds a new file `custom_types.py` in the aiogram directory.
The inclusion of `DateTime` type ensures better compatibility with the Telegram Bot API. `DateTime` type is further enhanced to work with unixtime.
---
 aiogram/custom_types.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 aiogram/custom_types.py

diff --git a/aiogram/custom_types.py b/aiogram/custom_types.py
new file mode 100644
index 00000000..cc600b63
--- /dev/null
+++ b/aiogram/custom_types.py
@@ -0,0 +1,17 @@
+import datetime
+from typing import Annotated
+
+from pydantic import PlainSerializer
+
+# Make datetime compatible with Telegram Bot API (unixtime)
+DateTime = Annotated[
+    datetime,
+    PlainSerializer(
+        func=lambda dt: int(dt.timestamp()),
+        return_type=int,
+        when_used="json-unless-none",
+    ),
+]
+
+# Make string compatible with custom lazy proxy
+# String = Union[str, LazyProxy]