Add support for restricted privacy user forwards

README.md

@@ -21,6 +21,14 @@ TELEGRAM_SUPPORT_CHAT_ID=  # chat_id where the bot will forward all incoming mes
 # optional params
 HEROKU_APP_NAME=  # name of your Heroku app for webhook setup
 WELCOME_MESSAGE=  # text of a message that bot will write on /start command
+
+# If user don't allow forward his messages Bot adds his comment with thue user_id to reply
+# Support team must reply to "bot reply", not to original user forwarded message
+# Customize message for support team here:
+REPLY_TO_THIS_MESSAGE=User above don't allow forward his messages. Reply to this message.
+# If support reply to forwarded messages with hidded sender, bor warns with next error:
+WRONG_REPLY=User above don't allow forward his messages. You must reply to bot reply under user forwarded message.
+
 ```
 
 ## Run bot locally

handlers.py

@@ -1,7 +1,8 @@
 import os
 from telegram.ext import CommandHandler, MessageHandler, Filters
 
-from settings import WELCOME_MESSAGE, TELEGRAM_SUPPORT_CHAT_ID
+from settings import WELCOME_MESSAGE, TELEGRAM_SUPPORT_CHAT_ID, REPLY_TO_THIS_MESSAGE, WRONG_REPLY
+
 
 def start(update, context):
     update.message.reply_text(WELCOME_MESSAGE)
@@ -24,7 +25,13 @@ def forward_to_chat(update, context):
         'text': 'TEST QOO', 'entities': [], 'caption_entities': [], 'photo': [], 'new_chat_members': [], 'new_chat_photo': [], 'delete_chat_photo': False, 'group_chat_created': False, 'supergroup_chat_created': False, 'channel_chat_created': False, 
         'from': {'id': 49820636, 'first_name': 'Daniil', 'is_bot': False, 'last_name': 'Okhlopkov', 'username': 'danokhlopkov', 'language_code': 'en'}
     }"""
-    update.message.forward(chat_id=TELEGRAM_SUPPORT_CHAT_ID)
+    forwarded = update.message.forward(chat_id=TELEGRAM_SUPPORT_CHAT_ID)
+    if not forwarded.forward_from:
+        context.bot.send_message(
+            chat_id=TELEGRAM_SUPPORT_CHAT_ID,
+            reply_to_message_id=forwarded.message_id,
+            text=f'{update.message.from_user.id}\n{REPLY_TO_THIS_MESSAGE}'
+        )
 
 
 def forward_to_user(update, context):
@@ -44,12 +51,25 @@ def forward_to_user(update, context):
         'group_chat_created': False, 'supergroup_chat_created': False, 'channel_chat_created': False, 
         'from': {'id': 49820636, 'first_name': 'Daniil', 'is_bot': False, 'last_name': 'Okhlopkov', 'username': 'danokhlopkov', 'language_code': 'en'}
     }"""
-    user_id = update.message.reply_to_message.forward_from.id
-    context.bot.copy_message(
-        message_id=update.message.message_id,
-        chat_id=user_id,
-        from_chat_id=update.message.chat_id
-    )
+    user_id = None
+    if update.message.reply_to_message.forward_from:
+        user_id = update.message.reply_to_message.forward_from.id
+    elif REPLY_TO_THIS_MESSAGE in update.message.reply_to_message.text:
+        try:
+            user_id = int(update.message.reply_to_message.text.split('\n')[0])
+        except ValueError:
+            user_id = None
+    if user_id:
+        context.bot.copy_message(
+            message_id=update.message.message_id,
+            chat_id=user_id,
+            from_chat_id=update.message.chat_id
+        )
+    else:
+        context.bot.send_message(
+            chat_id=TELEGRAM_SUPPORT_CHAT_ID,
+            text=WRONG_REPLY
+        )
 
 
 def setup_dispatcher(dp):

settings.py

@@ -18,3 +18,5 @@
 
 
 WELCOME_MESSAGE = os.getenv("WELCOME_MESSAGE", "👋")
+REPLY_TO_THIS_MESSAGE = os.getenv("REPLY_TO_THIS_MESSAGE", "REPLY_TO_THIS")
+WRONG_REPLY = os.getenv("WRONG_REPLY", "WRONG_REPLY")