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@@ -0,0 +1,624 @@
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+from google.auth.transport.requests import Request
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+from google_auth_oauthlib.flow import InstalledAppFlow
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+from googleapiclient.discovery import build
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+from email.mime.text import MIMEText
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+from email.mime.multipart import MIMEMultipart
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+from email.mime.base import MIMEBase
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+from email import encoders
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+
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+from bs4 import BeautifulSoup
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+import os
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+import pytz
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+import base64
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+import pickle
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+from datetime import datetime, timezone
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+import json
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+import ollama
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+from pypdf import PdfReader
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+from pathlib import Path
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+
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+SCOPES = ['https://www.googleapis.com/auth/gmail.readonly', 'https://www.googleapis.com/auth/gmail.compose']
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+
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+def authenticate_gmail(user_email):
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+ creds = None
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+ token_file = f'token_{user_email}.pickle' # Unique token file for each user
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+
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+ # Load the user's token if it exists
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+ if os.path.exists(token_file):
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+ with open(token_file, 'rb') as token:
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+ creds = pickle.load(token)
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+
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+ # If no valid credentials, prompt the user to log in
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+ if not creds or not creds.valid:
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+ if creds and creds.expired and creds.refresh_token:
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+ creds.refresh(Request())
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+ else:
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+ flow = InstalledAppFlow.from_client_secrets_file('credentials.json', SCOPES)
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+ creds = flow.run_console()
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+
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+ # Save the new credentials to a user-specific token file
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+ with open(token_file, 'wb') as token:
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+ pickle.dump(creds, token)
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+
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+ # Build the Gmail API service
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+ service = build('gmail', 'v1', credentials=creds)
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+ return service
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+
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+
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+def num_of_emails(query=''):
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+ response = service.users().messages().list(
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+ userId='me',
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+ q=query,
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+ maxResults=1).execute()
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+ return response.get('resultSizeEstimate', 0)
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+
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+
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+def list_emails(query='', max_results=100):
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+ emails = []
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+ next_page_token = None
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+
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+ while True:
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+ response = service.users().messages().list(
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+ userId=user_id,
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+ maxResults=max_results,
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+ pageToken=next_page_token,
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+ q=query
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+ ).execute()
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+
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+ if 'messages' in response:
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+ for msg in response['messages']:
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+ sender, subject, received_time = get_email_info(msg['id'])
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+ emails.append(
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+ {
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+ "message_id": msg['id'],
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+ "sender": sender,
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+ "subject": subject,
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+ "received_time": received_time
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+ }
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+ )
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+
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+ next_page_token = response.get('nextPageToken')
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+
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+ if not next_page_token:
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+ break
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+
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+ return emails
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+
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+def get_email_detail(detail, which=''):
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+ if detail == 'body':
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+ return get_email_body(which)
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+ elif detail == 'attachment':
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+ return get_email_attachments(which)
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+
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+
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+def get_email_body(message_id):
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+ try:
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+ message = service.users().messages().get(
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+ userId=user_id,
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+ id=message_id,
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+ format='full').execute()
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+
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+ # Recursive function to extract the parts
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+ def extract_parts(payload):
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+ text_body = ""
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+ if 'parts' in payload:
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+ for part in payload['parts']:
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+ return extract_parts(part)
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+ else:
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+ mime_type = payload.get('mimeType')
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+ body = payload.get('body', {}).get('data')
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+ if mime_type == 'text/html':
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+ decoded_body = base64.urlsafe_b64decode(body).decode('utf-8')
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+ soup = BeautifulSoup(decoded_body, 'html.parser')
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+ text_body = soup.get_text().strip()
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+ elif mime_type == 'text/plain':
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+ decoded_body = base64.urlsafe_b64decode(body).decode('utf-8')
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+ text_body = decoded_body
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+
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+ return text_body
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+
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+ return extract_parts(message['payload'])
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+
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+ except Exception as e:
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+ print(f"An error occurred: {e}")
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+ return None
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+
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+
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+def parse_message(message):
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+ payload = message['payload']
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+ headers = payload.get("headers")
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+
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+ subject = None
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+ sender = None
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+ for header in headers:
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+ if header['name'] == 'Subject':
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+ subject = header['value']
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+ elif header['name'] == 'From':
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+ sender = header['value']
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+
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+ internal_date = message.get('internalDate')
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+ utc_time = datetime.fromtimestamp(int(internal_date) / 1000, tz=timezone.utc)
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+
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+ # Convert UTC to the specified timezone
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+ local_timezone = pytz.timezone("America/Los_Angeles")
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+ local_time = utc_time.astimezone(local_timezone)
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+
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+ # Format the local time as a string
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+ received_time = local_time.strftime('%Y-%m-%d %H:%M:%S %Z')
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+
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+ # Check if the email is plain text or multipart
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+ if 'parts' in payload:
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+ # Multipart message - find the text/plain or text/html part
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+ for part in payload['parts']:
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+ if part['mimeType'] == 'text/plain' or part['mimeType'] == 'text/html': # You can also look for 'text/html'
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+ data = part['body']['data']
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+ body = base64.urlsafe_b64decode(data).decode('utf-8')
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+ return sender, subject, received_time, body
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+ elif part['mimeType'] in ['multipart/related', 'multipart/mixed', 'multipart/alternative']:
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+ return sender, subject, received_time, get_email_body(message.get('id'))
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+ else:
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+ # Single part message
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+ data = payload['body']['data']
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+ body = base64.urlsafe_b64decode(data).decode('utf-8')
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+ return sender, subject, received_time, body
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+
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+
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+def get_email_info(msg_id):
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+ message = service.users().messages().get(
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+ userId=user_id,
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+ id=msg_id,
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+ format='full').execute()
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+
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+ sender, subject, received_time, body = parse_message(message)
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+
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+ return sender, subject, received_time
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+
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+
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+def reply_email(message_id, reply_text):
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+ # Fetch the original message
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+ original_message = service.users().messages().get(
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+ userId=user_id,
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+ id=message_id,
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+ format='full').execute()
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+
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+ # Get headers
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+ headers = original_message['payload']['headers']
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+ subject = None
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+ to = None
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+ for header in headers:
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+ if header['name'] == 'Subject':
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+ subject = header['value']
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+ if header['name'] == 'From':
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+ to = header['value']
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+
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+ # Create the reply subject
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+ if not subject.startswith("Re: "):
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+ subject = "Re: " + subject
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+
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+ # Compose the reply message
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+ reply_message = MIMEText(reply_text)
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+ reply_message['to'] = to
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+ reply_message['from'] = user_id
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+ reply_message['subject'] = subject
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+ reply_message['In-Reply-To'] = message_id
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+
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+ # Encode and send the message
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+ raw_message = base64.urlsafe_b64encode(reply_message.as_bytes()).decode("utf-8")
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+ body = {'raw': raw_message,
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+ 'threadId': original_message['threadId']}
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+ sent_message = service.users().messages().send(
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+ userId=user_id,
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+ body=body).execute()
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+ print("Reply sent. Message ID:", sent_message['id'])
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+
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+
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+def forward_email(message_id, forward_to, email_body=None):
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+ """
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+ Forwards an email, preserving the original MIME type, including multipart/related.
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+ """
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+ # Get the original message in 'full' format
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+ original_message = service.users().messages().get(
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+ userId=user_id,
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+ id=message_id,
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+ format='full').execute()
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+
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+ # Extract the payload and headers
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+ payload = original_message.get('payload', {})
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+ headers = payload.get('headers', [])
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+ parts = payload.get('parts', [])
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+ # Get the Subject
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+ subject = next((header['value'] for header in headers if header['name'].lower() == 'subject'), 'No Subject')
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+
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+ # Create a new MIME message for forwarding
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+ mime_message = MIMEMultipart(payload.get('mimeType', 'mixed').split('/')[-1])
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+ mime_message['To'] = forward_to
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+ mime_message['Subject'] = f"Fwd: {subject}"
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+
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+ # Add the optional custom email body
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+ if email_body:
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+ mime_message.attach(MIMEText(email_body, 'plain'))
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+
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+ # Function to fetch attachment data by attachmentId
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+ def fetch_attachment_data(attachment_id, message_id):
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+ attachment = service.users().messages().attachments().get(
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+ userId=user_id, messageId=message_id, id=attachment_id
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+ ).execute()
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+ return base64.urlsafe_b64decode(attachment['data'])
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+
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+ # Rebuild MIME structure
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+ def rebuild_parts(parts):
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+ """
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+ Recursively rebuild MIME parts.
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+ """
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+ if not parts:
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+ return None
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+
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+ for part in parts:
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+ part_mime_type = part.get('mimeType', 'text/plain')
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+ part_body = part.get('body', {})
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+ part_data = part_body.get('data', '')
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+ part_parts = part.get('parts', []) # Sub-parts for multipart types
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+ filename = part.get('filename')
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+ attachment_id = part_body.get('attachmentId')
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+
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+ if part_mime_type.startswith('multipart/'):
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+ # Rebuild nested multipart
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+ sub_multipart = MIMEMultipart(part_mime_type.split('/')[-1])
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+ sub_parts = rebuild_parts(part_parts)
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+ if sub_parts:
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+ for sub_part in sub_parts:
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+ sub_multipart.attach(sub_part)
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+ yield sub_multipart
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+ elif filename and attachment_id:
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+ # Handle attachments
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+ decoded_data = fetch_attachment_data(attachment_id, message_id)
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+ attachment = MIMEBase(*part_mime_type.split('/'))
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+ attachment.set_payload(decoded_data)
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+ encoders.encode_base64(attachment)
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+ attachment.add_header('Content-Disposition', f'attachment; filename="{filename}"')
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+ yield attachment
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+ else:
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+ if part_data:
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+ # Decode and attach non-multipart parts
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+ decoded_data = base64.urlsafe_b64decode(part_data)
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+
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+ if part_mime_type == 'text/plain':
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+ yield MIMEText(decoded_data.decode('utf-8'), 'plain')
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+ elif part_mime_type == 'text/html':
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+ yield MIMEText(decoded_data.decode('utf-8'), 'html')
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+
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+ # Rebuild the main MIME structure
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+ rebuilt_parts = rebuild_parts(parts)
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+ if rebuilt_parts:
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+ for rebuilt_part in rebuilt_parts:
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+ mime_message.attach(rebuilt_part)
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+
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+ # Encode the MIME message to base64
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+ raw = base64.urlsafe_b64encode(mime_message.as_bytes()).decode('utf-8')
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+
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+ # Send the email
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+ forward_body = {'raw': raw}
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+ sent_message = service.users().messages().send(userId=user_id, body=forward_body).execute()
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+
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+ print(f"Message forwarded successfully! Message ID: {sent_message['id']}")
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+
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+
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+def send_email(action, to, subject, body="", email_id=""):
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+ if action == "compose":
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+ message = MIMEText(body)
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+ message['to'] = to
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+ message['from'] = user_id
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+ message['subject'] = subject
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+
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+ # Encode and send the message
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+ raw_message = base64.urlsafe_b64encode(message.as_bytes()).decode("utf-8")
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+ body = {'raw': raw_message}
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+ sent_message = service.users().messages().send(
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+ userId=user_id,
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+ body=body).execute()
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+ return sent_message['id']
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+ elif action == "reply": # reply or forward; a message id is needed
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+ reply_email(email_id, body)
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+ elif action == "forward":
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+ forward_email(email_id, to, body)
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+
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+
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+def create_draft(action, to, subject, body="", email_id=""):
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+ if action == "new":
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+ message = MIMEText(body)
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+ message['to'] = to
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+ message['from'] = user_id
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+ message['subject'] = subject
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+
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+ encoded_message = base64.urlsafe_b64encode(message.as_bytes()).decode()
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+ draft_body = {'message': {'raw': encoded_message}}
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+ draft = service.users().drafts().create(
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+ userId=user_id,
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+ body=draft_body).execute()
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+ print(f"Draft created with ID: {draft['id']}")
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+ return draft['id']
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+ elif action == "reply":
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+ return create_reply_draft(email_id, body)
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+ elif action == "forward":
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+ return create_forward_draft(email_id, to, body)
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+ else:
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+ return
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+
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+
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+
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+def create_reply_draft(message_id, reply_text):
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+ # Fetch the original message
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+ original_message = service.users().messages().get(
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+ userId=user_id,
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+ id=message_id,
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+ format='full').execute()
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+
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+ # Get headers
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+ headers = original_message['payload']['headers']
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+ subject = None
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+ to = None
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+ for header in headers:
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+ if header['name'] == 'Subject':
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+ subject = header['value']
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+ if header['name'] == 'From':
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+ to = header['value']
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+
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+ # Create the reply subject
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+ if not subject.startswith("Re: "):
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+ subject = "Re: " + subject
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+
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+ # Compose the reply message
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+ reply_message = MIMEText(reply_text)
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+ reply_message['to'] = to
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+ reply_message['from'] = user_id
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+ reply_message['subject'] = subject
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+ reply_message['In-Reply-To'] = message_id
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+
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+ encoded_message = base64.urlsafe_b64encode(reply_message.as_bytes()).decode()
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+ draft_body = {'message': {'raw': encoded_message, 'threadId': original_message['threadId']}}
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+ draft = service.users().drafts().create(userId=user_id, body=draft_body).execute()
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+ return draft['id']
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+
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+
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+def create_forward_draft(message_id, recipient_email, custom_message=None):
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+ # Get the original message
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+ original_message = service.users().messages().get(
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+ userId=user_id,
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+ id=message_id,
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+ format='raw').execute()
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+
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+ # Decode the raw message
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+ raw_message = base64.urlsafe_b64decode(original_message['raw'].encode('utf-8'))
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+
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+ # Prepare the forward header and optional custom message
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+ forward_header = f"----- Forwarded message -----\nFrom: {recipient_email}\n\n"
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+ if custom_message:
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+ forward_header += f"{custom_message}\n\n"
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+
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+ # Combine the forward header with the original message
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+ new_message = forward_header + raw_message.decode('utf-8')
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+
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+ # Encode the combined message into base64 format
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+ encoded_message = base64.urlsafe_b64encode(new_message.encode('utf-8')).decode('utf-8')
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+
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+ draft_body = {'message': {'raw': encoded_message, 'threadId': original_message['threadId']}}
|
|
|
+ draft = service.users().drafts().create(userId=user_id, body=draft_body).execute()
|
|
|
+ print(f"Forward draft created with ID: {draft['id']}")
|
|
|
+ return draft['id']
|
|
|
+
|
|
|
+
|
|
|
+def send_draft(id):
|
|
|
+ sent_message = service.users().drafts().send(
|
|
|
+ userId=user_id,
|
|
|
+ body={'id': id}
|
|
|
+ ).execute()
|
|
|
+ return f"Draft sent with email ID: {sent_message['id']}"
|
|
|
+
|
|
|
+
|
|
|
+def get_pdf_summary(file_name):
|
|
|
+ text = pdf2text(file_name)
|
|
|
+ print("Calling Llama to generate a summary...")
|
|
|
+ response = llama31(text, "Generate a summary of the input text in 5 sentences.")
|
|
|
+ return response
|
|
|
+
|
|
|
+
|
|
|
+def get_email_attachments(message_id, mime_type='application/pdf'):
|
|
|
+ attachments = []
|
|
|
+
|
|
|
+ # Helper function to process email parts
|
|
|
+ def process_parts(parts):
|
|
|
+ for part in parts:
|
|
|
+ if part['mimeType'] in ['multipart/related', 'multipart/mixed', 'multipart/alternative']:
|
|
|
+ # Recursively process nested parts
|
|
|
+ if 'parts' in part:
|
|
|
+ process_parts(part['parts'])
|
|
|
+ elif 'filename' in part and part['filename']:
|
|
|
+ if part['mimeType'] == mime_type: # Check for the desired MIME type
|
|
|
+ attachment_id = part['body'].get('attachmentId')
|
|
|
+ if attachment_id:
|
|
|
+ # Get the attachment data
|
|
|
+ attachment = service.users().messages().attachments().get(
|
|
|
+ userId=user_id,
|
|
|
+ messageId=message_id,
|
|
|
+ id=attachment_id
|
|
|
+ ).execute()
|
|
|
+
|
|
|
+ # Decode the attachment content
|
|
|
+ file_data = base64.urlsafe_b64decode(attachment['data'].encode('UTF-8'))
|
|
|
+
|
|
|
+ with open(part['filename'], "wb") as f:
|
|
|
+ f.write(file_data)
|
|
|
+
|
|
|
+ # Save the attachment information
|
|
|
+ attachments.append(
|
|
|
+ {'filename': part['filename'],
|
|
|
+ 'data': file_data,
|
|
|
+ 'size': attachment.get('size', 0)
|
|
|
+ })
|
|
|
+
|
|
|
+ # Retrieve the email message
|
|
|
+ message = service.users().messages().get(
|
|
|
+ userId=user_id,
|
|
|
+ id=message_id,
|
|
|
+ format='full').execute()
|
|
|
+ payload = message['payload']
|
|
|
+
|
|
|
+ # Start processing the parts
|
|
|
+ if 'parts' in payload:
|
|
|
+ process_parts(payload['parts'])
|
|
|
+
|
|
|
+ rslt = ""
|
|
|
+ for a in attachments:
|
|
|
+ rslt += f"{a['filename']} - {a['size']} bytes\n"
|
|
|
+ return rslt #attachments
|
|
|
+
|
|
|
+
|
|
|
+def pdf2text(file):
|
|
|
+ text = ''
|
|
|
+ try:
|
|
|
+ with Path(file).open("rb") as f:
|
|
|
+ reader = PdfReader(f)
|
|
|
+ text = "\n\n".join([page.extract_text() for page in reader.pages])
|
|
|
+ except Exception as e:
|
|
|
+ raise f"Error reading the PDF file: {str(e)}"
|
|
|
+
|
|
|
+ print(f"\nPDF text length: {len(text)}\n")
|
|
|
+
|
|
|
+ return text
|
|
|
+
|
|
|
+
|
|
|
+user_email = None
|
|
|
+service = None
|
|
|
+user_id = 'me'
|
|
|
+
|
|
|
+def set_email_service(email):
|
|
|
+ global user_email
|
|
|
+ global service
|
|
|
+
|
|
|
+ user_email = email
|
|
|
+ service = authenticate_gmail(user_email)
|
|
|
+
|
|
|
+class Agent:
|
|
|
+ def __init__(self, system_prompt=""):
|
|
|
+ self.system_prompt = system_prompt
|
|
|
+ self.messages = []
|
|
|
+
|
|
|
+ # Gmagent-specific short term memory, used to answer follow up questions AFTER a list of emails is found matching user's query
|
|
|
+ self.emails = []
|
|
|
+ self.draft_id = None
|
|
|
+
|
|
|
+ if self.system_prompt:
|
|
|
+ self.messages.append({"role": "system", "content": system_prompt})
|
|
|
+
|
|
|
+ def __call__(self, user_prompt_or_tool_result, is_tool_call=False):
|
|
|
+ # if it's tool call result, use "ipython" instead of "user" for the role
|
|
|
+ self.messages.append({"role": ("ipython" if is_tool_call else "user"), "content": user_prompt_or_tool_result})
|
|
|
+ result = self.llama()
|
|
|
+ print(f"\nLlama returned: {result}.")
|
|
|
+ if type(result) == dict: # result is a dict only if it's a tool call spec
|
|
|
+ function_name = result["function_name"]
|
|
|
+ func = globals()[function_name]
|
|
|
+ parameters = result["parameters"]
|
|
|
+ if function_name == "get_email_detail":
|
|
|
+ # TODO: parse which - valid values are first, second,
|
|
|
+ # third, fourth, last, from xxx
|
|
|
+ if 'id' in parameters.keys():
|
|
|
+ parameters['which'] = parameters['id']
|
|
|
+ del parameters['id'] # per the function spec
|
|
|
+ elif 'which' in parameters.keys():
|
|
|
+ if 'from ' in parameters['which']:
|
|
|
+ sender = parameters['which'].split('from ')[-1]
|
|
|
+ for email in self.emails:
|
|
|
+ if email['sender'].find(sender) != -1:
|
|
|
+ parameters['which'] = email['message_id']
|
|
|
+ break
|
|
|
+ if 'subject ' in parameters['which']:
|
|
|
+ subject = parameters['which'].split('subject ')[-1]
|
|
|
+ # exact match beats substring
|
|
|
+ for email in self.emails:
|
|
|
+ if email['subject'].upper() == subject.upper():
|
|
|
+ parameters['which'] = email['message_id']
|
|
|
+ break
|
|
|
+ elif email['subject'].upper().find(subject.upper()) != -1:
|
|
|
+ parameters['which'] = email['message_id']
|
|
|
+
|
|
|
+ elif 'id_' in parameters['which']:
|
|
|
+ parameters['which'] = parameters['which'].split('id_')[-1]
|
|
|
+ else:
|
|
|
+ parameters['which'] = self.emails[-1]['message_id']
|
|
|
+ elif function_name == "send_draft":
|
|
|
+ parameters['id'] = self.draft_id
|
|
|
+
|
|
|
+ print(f"\nCalling tool to access Gmail API: {function_name}, {parameters}...")
|
|
|
+ result = func(**parameters)
|
|
|
+ print(f"\nTool calling returned: {result}")
|
|
|
+
|
|
|
+ # convert function calling result to concise summary, offering interactive follow ups,
|
|
|
+ # for smooth and user friendly experience
|
|
|
+ if function_name == 'list_emails':
|
|
|
+ self.emails = result
|
|
|
+ num = len(result)
|
|
|
+ if num == 0:
|
|
|
+ output = "I couldn't find any such emails. What else would you like to do?"
|
|
|
+ elif num <= 5:
|
|
|
+ output = f"I found {num} email{'s' if num > 1 else ''} matching your query:\n"
|
|
|
+ for i, email in enumerate(result, start=1):
|
|
|
+ output += f"{i}. From: {email['sender']}, Subject: {email['subject']}, Received on: {email['received_time']}\n"
|
|
|
+ else:
|
|
|
+ output = f"I found {num} emails matching your query. Here are the first 5 emails:\n"
|
|
|
+ for i in range(1, 6):
|
|
|
+ output += f"{i}. From: {result[i-1]['sender']}, Subject: {result[i-1]['subject']}, Received on: {result[i-1]['received_time']}\n"
|
|
|
+ elif function_name == "get_email_detail":
|
|
|
+ output = result
|
|
|
+ elif function_name == "get_pdf_summary":
|
|
|
+ output = result
|
|
|
+ elif function_name == "send_email":
|
|
|
+ output = "Email sent."
|
|
|
+ elif function_name == "create_draft":
|
|
|
+ output = "Draft created."
|
|
|
+ self.draft_id = result
|
|
|
+ elif function_name == "send_draft":
|
|
|
+ output = result
|
|
|
+
|
|
|
+ print(f"\n-------------------------\n\nGmagent: {output}\n")
|
|
|
+ else:
|
|
|
+ output = result # direct text, not JSON, response by Llama
|
|
|
+
|
|
|
+ # adding this may cause Llama to hallucinate when answering
|
|
|
+ # follow up questions. e.g. "do i have emails with attachments
|
|
|
+ # larger than 20mb" got right tool calling response, then
|
|
|
+ # follow up "larger than 10mb" got hallucinated response.
|
|
|
+ # self.messages.append({"role": "assistant", "content": output})
|
|
|
+
|
|
|
+ # this mitigates the hallucination
|
|
|
+ self.messages.append({"role": "assistant", "content": str(result)})
|
|
|
+
|
|
|
+ return output
|
|
|
+
|
|
|
+ def llama(self):
|
|
|
+ response = ollama.chat(model='llama3.1',
|
|
|
+ messages = self.messages,
|
|
|
+ options = {
|
|
|
+ "temperature": 0.0
|
|
|
+ }
|
|
|
+ )
|
|
|
+ result = response['message']['content']
|
|
|
+
|
|
|
+ try:
|
|
|
+ res = json.loads(result.split("<|python_tag|>")[-1])
|
|
|
+ function_name = res['name']
|
|
|
+ parameters = res['parameters']
|
|
|
+ return {"function_name": function_name,
|
|
|
+ "parameters": parameters}
|
|
|
+ except:
|
|
|
+ return result
|
|
|
+
|
|
|
+
|
|
|
+def llama31(user_prompt: str, system_prompt = ""):
|
|
|
+ response = ollama.chat(model='llama3.1',
|
|
|
+ messages=[
|
|
|
+ {"role": "system", "content": system_prompt},
|
|
|
+ {"role": "user", "content": user_prompt},
|
|
|
+ ],
|
|
|
+ )
|
|
|
+ return response['message']['content']
|
Jeff Tang