gmail-total-unread-emails-multi.py

from __future__ import print_function
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
import paho.mqtt.client as paho

### BEGIN Editable Vars
MQTT_BROKER = "192.168.1.125"
MQTT_PORT = 1883
MQTT_TOPIC = "test" # keep as-is this for now unless you know what you're doing
MQTT_CLIENT_NAME = "control1" # no need to alter this
MQTT_USER = "justin" 
MQTT_PASS = "<password>"
MQTT_MESSAGE_APPEND = " Emails" # Append " Emails" to the message. The response will look like "7 Emails"
### END Editable Vars

# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/gmail.readonly']

class GmailMessagesUnreadCount:

		def __init__(self, cred, token):
			self.cred = cred
			self.token = token
			self.run()

		def ListMessagesMatchingQuery(self, service, user_id, query=''):
			"""List all Messages of the user's mailbox matching the query.

			Args:
				service: Authorized Gmail API service instance.
				user_id: User's email address. The special value "me"
				can be used to indicate the authenticated user.
				query: String used to filter messages returned.
				Eg.- 'from:user@some_domain.com' for Messages from a particular sender.

			Returns:
				List of Messages that match the criteria of the query. Note that the
				returned list contains Message IDs, you must use get with the
				appropriate ID to get the details of a Message.
			"""
			try:
				response = service.users().messages().list(userId=user_id,
																									 q=query).execute()
				messages = []
				if 'messages' in response:
					messages.extend(response['messages'])

				while 'nextPageToken' in response:
					page_token = response['nextPageToken']
					response = service.users().messages().list(userId=user_id, q=query,
																						 pageToken=page_token).execute()
					messages.extend(response['messages'])

				return messages
			except:
				print('An error occurred:')

		def run(self):
				"""Shows basic usage of the Gmail API.
				Lists the user's Gmail labels.
				"""
				creds = None
				# The file token.pickle stores the user's access and refresh tokens, and is
				# created automatically when the authorization flow completes for the first
				# time.
				if os.path.exists(self.token):
						with open(self.token, 'rb') as token:
								creds = pickle.load(token)
				# If there are no (valid) credentials available, let the user log in.
				if not creds or not creds.valid:
						if creds and creds.expired and creds.refresh_token:
								creds.refresh(Request())
						else:
								flow = InstalledAppFlow.from_client_secrets_file(
										self.cred, SCOPES)
								creds = flow.run_local_server(port=0)
						# Save the credentials for the next run
						with open('token.pickle', 'wb') as token:
								pickle.dump(creds, token)

				service = build('gmail', 'v1', credentials=creds)
				
				email_count = len(self.ListMessagesMatchingQuery(service, "me", "label:unread label:inbox"))

				print("Email count:", email_count)

				try:
						broker=MQTT_BROKER
						port=MQTT_PORT
						def on_publish(client,userdata,result):
								print("data published \n")
								pass
						client1= paho.Client(MQTT_CLIENT_NAME)
						client1.on_publish = on_publish
						client1.username_pw_set(MQTT_USER, password=MQTT_PASS)
						client1.connect(broker,port)
						ret= client1.publish(MQTT_TOPIC,str(email_count)+MQTT_MESSAGE_APPEND)
				except:
						print("something went wrong")

				return email_count

gmail_one = GmailMessagesUnreadCount("credentials.json", "token.pickle")
gmail_two = GmailMessagesUnreadCount("credentials.json", "token.pickle")
gmail_three = GmailMessagesUnreadCount("credentials.json", "token.pickle")

Get the total unread email message count via the gmail api and forward to MQTT (example for multiple gmail accounts).