Fix: bot not notifying new articles + minor refactor

managers/telegram_manager.py

@@ -0,0 +1,45 @@
+import asyncio
+import yaml
+import telegram
+import re
+
+ITEM_TEXT = "- *Artículo*: {}\n" \
+            "- *Descripción*: {}\n" \
+            "- *Localidad*: {}\n" \
+            "- *Precio*: {} {}\n" \
+            "- *Acepta envíos*: {}\n" \
+            "[Ir al anuncio](https://es.wallapop.com/item/{})"
+
+
+class TelegramManager:
+    def __init__(self):
+        token, channel = self.get_config()
+        self._channel = channel
+        self._bot = telegram.Bot(token=token)
+        self._loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self._loop)
+
+    def get_config(self):
+        config_file = 'config.yaml'
+        with open(config_file, 'r') as file:
+            config = yaml.safe_load(file)
+            token = config['telegram_token']
+            telegram_channel = config['telegram_channel']
+        return token, telegram_channel
+
+    
+    def escape_markdown(self, text):
+        special_chars = r'_[\]()~`>#\+\-=|{}.!]'
+        escaped_text = re.sub(f'([{re.escape(special_chars)}])', r'\\\1', text)
+        return escaped_text
+
+    def send_telegram_article(self, article):
+        self._loop.run_until_complete(self.send_telegram_article_async(article))
+
+    async def send_telegram_article_async(self, article):
+        message = ITEM_TEXT.format(article.get_title(), self.escape_markdown(article.get_description()),
+                                   self.escape_markdown(article.get_location()), article.get_price(), 
+                                   article.get_currency(), article.get_allows_shipping(),
+                                   article.get_url())
+        escaped_message = self.escape_markdown(message)
+        await self._bot.send_message(self._channel, text=escaped_message, parse_mode="MarkdownV2")