Add the option to send a message to DEV_CHAT_ID chat when the URL is …

…not filtered.

If the DEV_CHAT_ID environment variable is set, the bot will send a
message to that chat if it fails to filter the URL or the product
code is not found, unless the url is base_url.

README.md

@@ -19,14 +19,18 @@ If you find different URS schemes, they can be added to the regular expression a
 
 ## Env variables
 
-There are 4 required env variables that must be configured in Heroku to work.
+There are 3 required env variables that must be configured in Heroku to work.
 
 * ```affiliate_tag``` : The affiliate tag you want to use for the generated URL.
 
 * ```search_url```: The base URL used for the link. For example "amazon.es" for the Spanish Amazon website products. The URL must be provided without `http`/`https` and without `www.`
 
 * ```TOKEN```: The API Token of the telegram bot. This can be obtained after creating a bot with botFather.
 
+There is an optional variable that can be set with the chat_id of the developer with the bot to receive messages when an URL is not filtered or the product code is not found.
+
+* ```DEV_CHAT_ID```: Telegram chat id of the chat to send the messages 
+
 ## How to create your own bot
 
 If you want to create your own bot, fork or clone this repo and configure it to run locally. 

bot.py

@@ -17,6 +17,7 @@
 
 # Read env variables
 TOKEN = os.environ['TOKEN']
+DEV_CHAT_ID = os.environ['DEV_CHAT_ID'] if 'DEV_CHAT_ID' in os.environ else None
 search_url = os.environ['search_url'] 
 affiliate_tag = os.environ['affiliate_tag']
 
@@ -40,7 +41,7 @@ async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
         update: The incoming update.
         context: The context of the bot.
     """
-    await context.bot.send_message(chat_id=update.effective_chat.id, text="Hola! Este bot responde a los enlaces de amazon añadiendo un codigo de afiliado!")
+    await context.bot.send_message(chat_id=update.effective_chat.id, text=f"Hola! Este bot responde a los enlaces de amazon añadiendo un codigo de afiliado!")
 
 def create_affiliate_url(product_code: str) -> str:
     """Create a new URL with the the product code and the affiliate tag.
@@ -105,9 +106,15 @@ async def filterText(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None
         # Create and send the new url with the affiliate tag
         new_url = create_affiliate_url(pCode)
         logger.info(f"Filtered link: {msg} -> {new_url}" if m != None else f"Product code not found: {msg} -> {new_url}")
+
+        if DEV_CHAT_ID is not None and msg != base_url:
+            await context.bot.sendMessage(chat_id=DEV_CHAT_ID, text=f'Product code not found! Original URL: {msg} ')
+
         await context.bot.sendMessage(chat_id=update.message.chat_id, reply_to_message_id=update.effective_message.id, text=new_url)
     else:
         logger.warning(f'URL not filtered: {msg}')
+        if DEV_CHAT_ID is not None:
+            await context.bot.sendMessage(chat_id=DEV_CHAT_ID, text=f'URL not filtered: {msg}')
 
 def main():
     """Start the bot."""