From 2617618cef93a4484eaf691aa5158b0351168892 Mon Sep 17 00:00:00 2001
From: Dan <14043624+delivrance@users.noreply.github.com>
Date: Thu, 23 Aug 2018 21:21:27 +0200
Subject: [PATCH] Add support for Document message edits

---
 .../methods/messages/edit_message_media.py    | 50 ++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

diff --git a/pyrogram/client/methods/messages/edit_message_media.py b/pyrogram/client/methods/messages/edit_message_media.py
index 086d8dc2..7bf66d5e 100644
--- a/pyrogram/client/methods/messages/edit_message_media.py
+++ b/pyrogram/client/methods/messages/edit_message_media.py
@@ -26,7 +26,7 @@ from pyrogram.api.errors import FileIdInvalid
 from pyrogram.client.ext import BaseClient, utils
 from pyrogram.client.types import (
     InputMediaPhoto, InputMediaVideo, InputMediaAudio,
-    InputMediaAnimation
+    InputMediaAnimation, InputMediaDocument
 )
 
 
@@ -245,6 +245,54 @@ class EditMessageMedia(BaseClient):
                         )
                     )
 
+        if isinstance(media, InputMediaDocument):
+            if os.path.exists(media.media):
+                media = self.send(
+                    functions.messages.UploadMedia(
+                        peer=self.resolve_peer(chat_id),
+                        media=types.InputMediaUploadedDocument(
+                            mime_type=mimetypes.types_map.get("." + media.media.split(".")[-1], "text/plain"),
+                            file=self.save_file(media.media),
+                            attributes=[
+                                types.DocumentAttributeFilename(os.path.basename(media.media))
+                            ]
+                        )
+                    )
+                )
+
+                media = types.InputMediaDocument(
+                    id=types.InputDocument(
+                        id=media.document.id,
+                        access_hash=media.document.access_hash
+                    )
+                )
+            elif media.media.startswith("http"):
+                media = types.InputMediaDocumentExternal(
+                    url=media.media
+                )
+            else:
+                try:
+                    decoded = utils.decode(media.media)
+                    fmt = "<iiqqqqi" if len(decoded) > 24 else "<iiqq"
+                    unpacked = struct.unpack(fmt, decoded)
+                except (AssertionError, binascii.Error, struct.error):
+                    raise FileIdInvalid from None
+                else:
+                    if unpacked[0] not in (5, 10):
+                        media_type = BaseClient.MEDIA_TYPE_ID.get(unpacked[0], None)
+
+                        if media_type:
+                            raise FileIdInvalid("The file_id belongs to a {}".format(media_type))
+                        else:
+                            raise FileIdInvalid("Unknown media type: {}".format(unpacked[0]))
+
+                    media = types.InputMediaDocument(
+                        id=types.InputDocument(
+                            id=unpacked[2],
+                            access_hash=unpacked[3]
+                        )
+                    )
+
         r = self.send(
             functions.messages.EditMessage(
                 peer=self.resolve_peer(chat_id),