Update telegram library, add docs

campcam.py

@@ -1,39 +1,52 @@
-import telegram
-from telegram.ext import CommandHandler, Updater
+import logging
 import picamera
 import time
-import os
+
+from telegram import ForceReply, Update
+from telegram.ext import Application, CommandHandler, ContextTypes, MessageHandler, filters
+
 import secrets
 
-bot = telegram.Bot(token=secrets.API_TOKEN)
+logging.basicConfig(
+    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', level=logging.INFO
+)
+logging.getLogger('httpx').setLevel(logging.WARNING)
 
-def send_photo(update, context):
-    # Take a photo with the Raspberry Pi camera
+logger = logging.getLogger(__name__)
 
+
+async def start(update, context):
+    user = update.effective_user
+    await update.message.reply_html(
+        rf'Hi {user.mention_html()}!',
+        reply_markup=ForceReply(selective=True),
+    )
+
+async def campcam(update, context):
     print('Got campcam command')
 
     with picamera.PiCamera() as camera:
         camera.resolution = (2592, 1944)
         camera.start_preview()
-        # Camera warm-up time
         time.sleep(5)
-        # Save the photo to a file
         filename = 'data/' + str(int(time.time())) + '.jpg'
         camera.capture(filename)
 
     print('Saved file to', filename)
 
-    chat_id = update.message.chat_id
-    message_id = update.message.message_id
-    bot.send_photo(chat_id=chat_id, photo=open(filename, 'rb'), reply_to_message_id=message_id)
+    await update.message.reply_photo(photo=open(filename, 'rb'), connect_timeout=300, write_timeout=300, read_timeout=300)
 
     print('Sent to chat')
 
-send_photo_handler = CommandHandler('campcam', send_photo)
-updater = Updater(bot=bot, workers=1)
-dispatcher = updater.dispatcher
-dispatcher.add_handler(send_photo_handler)
 
-print('Loaded.')
+def main():
+    application = Application.builder().token(secrets.API_TOKEN).build()
 
-updater.start_polling()
+    application.add_handler(CommandHandler('start', start))
+    application.add_handler(CommandHandler('campcam', campcam))
+
+    application.run_polling(allowed_updates=Update.ALL_TYPES)
+
+
+if __name__ == '__main__':
+    main()