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main.py

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+import requests, json, os
+from bs4 import BeautifulSoup
+from datetime import datetime
+
+# Config
+
+URL = os.environ.get('VODOKANAL_URL', 'http://www.tgnvoda.ru/avarii.php')
+SEND_SILENT = os.environ.get('SEND_SILENT', False)
+TELEGRAM_TOKEN = os.environ.get('TELEGRAM_TOKEN', '')
+TELEGRAM_CHANNEL = os.environ.get('TELEGRAM_CHANNEL', '')
+
+if TELEGRAM_TOKEN == '':
+    print("Telegram token is not set")
+    exit()
+
+if TELEGRAM_CHANNEL == '':
+    print("Telegram channel is not set")
+    exit()
+
+# Load database
+
+db = None
+if (os.path.isfile('db.json')):
+    with open('db.json', 'r', encoding='utf-8') as f:
+        db = json.load(f)
+else:
+    print("Database not loaded")
+
+# Get data
+
+req = requests.get(URL)
+
+if (req.status_code != 200):
+    print("Request error: " + str(req.status_code))
+    exit()
+
+soup = BeautifulSoup(req.content, "html.parser")
+
+elements = []
+for tag in soup.find_all('font', size='2', face='VERDANA'):
+    date = tag.select_one('font:nth-of-type(1)').b.text
+    if not(date.split('.')[0] == str(datetime.today().day).zfill(2) and date.split('.')[1] == str(datetime.today().month).zfill(2)):
+        continue
+    elements.append(tag.select_one('font:nth-of-type(2)').text.replace('\n', ''))
+
+if elements == []:
+    print("No posts")
+    exit()
+
+print("The number of posts for this day:", len(elements))
+
+# Send telegram message
+
+def send_message(message):
+    req = requests.get("https://api.telegram.org/bot" + TELEGRAM_TOKEN + "/sendMessage?chat_id=" + TELEGRAM_CHANNEL + "&disable_notification=" + str(SEND_SILENT) + "&text=" + message)
+    if (req.status_code != 200):
+        print("Telegram request error: " + str(req.status_code))
+        exit()
+    else:
+        print("Telegram message sent, mess id: " + str(req.json()['result']['message_id']))
+
+# Compare db and elements
+
+if db is not None:
+    diff = list(set(elements).symmetric_difference(set(db)))
+    for i in diff:
+        send_message(i)
+else:
+    for element in elements:
+        send_message(element)
+
+# Save database
+
+with open('db.json', 'w', encoding='utf-8') as f:
+    json.dump(elements, f, ensure_ascii=False)
+    print("Database updated")