From d7d6997ebb2320aaa5c919b2c6b4d6a5050b4c26 Mon Sep 17 00:00:00 2001
From: Egor <egor.birdi7@gmail.com>
Date: Tue, 9 Jun 2020 20:13:03 +0300
Subject: [PATCH] feat: ForwardedMessage filter

---
 aiogram/dispatcher/dispatcher.py       |  8 +++++++-
 aiogram/dispatcher/filters/__init__.py |  3 ++-
 aiogram/dispatcher/filters/builtin.py  | 10 ++++++++++
 docs/source/dispatcher/filters.rst     |  8 ++++++++
 tests/test_utils/test_markdown.py      |  0
 5 files changed, 27 insertions(+), 2 deletions(-)
 create mode 100644 tests/test_utils/test_markdown.py

diff --git a/aiogram/dispatcher/dispatcher.py b/aiogram/dispatcher/dispatcher.py
index b485fa49..164d6aad 100644
--- a/aiogram/dispatcher/dispatcher.py
+++ b/aiogram/dispatcher/dispatcher.py
@@ -10,7 +10,7 @@ from aiohttp.helpers import sentinel
 
 from aiogram.utils.deprecated import renamed_argument
 from .filters import Command, ContentTypeFilter, ExceptionsFilter, FiltersFactory, HashTag, Regexp, \
-    RegexpCommandsFilter, StateFilter, Text, IDFilter, AdminFilter, IsReplyFilter
+    RegexpCommandsFilter, StateFilter, Text, IDFilter, AdminFilter, IsReplyFilter, ForwardedMessageFilter
 from .filters.builtin import IsSenderContact
 from .handler import Handler
 from .middlewares import MiddlewareManager
@@ -160,6 +160,12 @@ class Dispatcher(DataMixin, ContextInstanceMixin):
             self.channel_post_handlers,
             self.edited_channel_post_handlers,
         ])
+        filters_factory.bind(ForwardedMessageFilter, event_handlers=[
+            self.message_handlers,
+            self.edited_channel_post_handlers,
+            self.channel_post_handlers,
+            self.edited_channel_post_handlers
+        ])
 
     def __del__(self):
         self.stop_polling()
diff --git a/aiogram/dispatcher/filters/__init__.py b/aiogram/dispatcher/filters/__init__.py
index 6de3cc7a..edd1959a 100644
--- a/aiogram/dispatcher/filters/__init__.py
+++ b/aiogram/dispatcher/filters/__init__.py
@@ -1,6 +1,6 @@
 from .builtin import Command, CommandHelp, CommandPrivacy, CommandSettings, CommandStart, ContentTypeFilter, \
     ExceptionsFilter, HashTag, Regexp, RegexpCommandsFilter, StateFilter, \
-    Text, IDFilter, AdminFilter, IsReplyFilter, IsSenderContact
+    Text, IDFilter, AdminFilter, IsReplyFilter, IsSenderContact, ForwardedMessageFilter
 from .factory import FiltersFactory
 from .filters import AbstractFilter, BoundFilter, Filter, FilterNotPassed, FilterRecord, execute_filter, \
     check_filters, get_filter_spec, get_filters_spec
@@ -32,4 +32,5 @@ __all__ = [
     'get_filters_spec',
     'execute_filter',
     'check_filters',
+    'ForwardedMessageFilter',
 ]
diff --git a/aiogram/dispatcher/filters/builtin.py b/aiogram/dispatcher/filters/builtin.py
index 5fe01dde..c40546a6 100644
--- a/aiogram/dispatcher/filters/builtin.py
+++ b/aiogram/dispatcher/filters/builtin.py
@@ -681,3 +681,13 @@ class IsReplyFilter(BoundFilter):
             return {'reply': msg.reply_to_message}
         elif not msg.reply_to_message and not self.is_reply:
             return True
+
+
+class ForwardedMessageFilter(BoundFilter):
+    key = 'is_forward'
+
+    def __init__(self, is_forward: bool):
+        self.is_forward = is_forward
+
+    async def check(self, message: Message):
+        return bool(getattr(message, "forward_date")) is self.is_forward
diff --git a/docs/source/dispatcher/filters.rst b/docs/source/dispatcher/filters.rst
index af06b73e..3681dfcb 100644
--- a/docs/source/dispatcher/filters.rst
+++ b/docs/source/dispatcher/filters.rst
@@ -141,6 +141,14 @@ IsReplyFilter
     :show-inheritance:
 
 
+ForwardedMessageFilter
+-------------
+
+.. autoclass:: aiogram.dispatcher.filters.filters.ForwardedMessageFilter
+    :members:
+    :show-inheritance:
+
+
 Making own filters (Custom filters)
 ===================================
 
diff --git a/tests/test_utils/test_markdown.py b/tests/test_utils/test_markdown.py
new file mode 100644
index 00000000..e69de29b