SAMPLE of using rocket chat API from Google Apps Script

https://rocket.chat/docs/developer-guides/rest-api/

rocketchat_api.gs

• login_rocketchat()
  • login to rocketchat
• get_channel_id(channel)
  • get channnel ID
• post_message(channel, text)
  • send message to specified channel
• post_file(channel, file)
  • send file to specified channel
• get_channel_history(channel)
  • get specified channel history
• delete_message(channel, message_id)
  • delete message
• delete_latest_message(channel)
  • delete latest message

Please see the code for details!

get sheet pdf -> png function

https://www.convertapi.com/pdf-to-png
send_images.gs

• pdf2png(pdf)
  • convert pdf to png using convertapi
• get_sheet_image()
  • get specified sheet image
• send_sheet_image()
  • send sheet image