Slack Bot

# Import Slack Client
from slackclient import SlackClient
## Import Time
import time


#Set Bot Name
BOT_NAME = ''

#We will give the token in a moment
SLACK_BOT_TOKEN = ""
CHANNEL_ID = ""
BOT_ID = ""
AT_BOT = '<@' + BOT_ID + '>'


### OUR FIRST COMMAND ####
EXAMPLE_COMMAND = 'hello'

# This is for communicating with the Slack API
slack_client = SlackClient(SLACK_BOT_TOKEN)


### This is the command Parser that many start bots use for Slack
def parse_slack_output(slack_rtm_output):
    """
        The Slack Real Time Messaging API is an events firehose.
        this parsing function returns None unless a message is
        directed at the Bot, based on its ID.
    """

    output_list = slack_rtm_output
    if output_list and len(output_list) > 0:
        for output in output_list:
            if output and 'text' in output and AT_BOT in output['text']:

                # return text after the @ mention, whitespace removed

                return (output['text'
                        ].split(AT_BOT)[1].strip().lower(),
                        output['channel'])
    return (None, None)

def handle_command(command, channel):
    """
        Receives commands directed at the bot and determines if they
        are valid commands. If so, then acts on the commands. If not,
        returns back what it needs for clarification.
    """

    response = 'Not sure what you mean. Use the *' + EXAMPLE_COMMAND \
        + '* command with numbers, delimited by spaces.'
    if command.startswith(EXAMPLE_COMMAND):
        response = 'Greetings, and Congratulations'
        slack_client.api_call('chat.postMessage', channel=channel,
                              text=response, as_user=True)
    
    else:
        response = 'Channel: ' + channel \
            + 'I do not understand this command!!'
        slack_client.api_call('chat.postMessage', channel=channel,
                              text=response, as_user=True)

## __main__ is default for the top level .py being run in all py programs
if __name__ == '__main__':
   ## Setting a delay for how quickly to check for commands
   READ_WEBSOCKET_DELAY = 1  # 1 second delay between reading from firehose
   if slack_client.rtm_connect():
       print ('Bot connected and running!')
       while True:
           (command, channel) = \
               parse_slack_output(slack_client.rtm_read())
           if command and channel:
               handle_command(command, channel)
           time.sleep(READ_WEBSOCKET_DELAY)
   else:
       print ('Connection failed. Invalid Slack token or bot ID?')