copilot-swe-agent[bot]
9a342af609
Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
604 lines
22 KiB
Python
604 lines
22 KiB
Python
#!/usr/bin/env python3
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import email
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import imaplib
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import json
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import logging
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import os
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import re
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from datetime import datetime, timedelta, timezone
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import redis
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from celery import shared_task
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from app.config import settings
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from app.tasks.convert_to_pdf import convert_to_pdf # new conversion task
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from app.tasks.process_document import process_document # Updated import
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from app.utils.allowed_types import ALLOWED_EXTENSIONS, ALLOWED_MIME_TYPES
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# Database session for per-user IMAP accounts (imported lazily to avoid circular imports)
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_db_session_factory = None
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# Maximum length to store as last_error to prevent DB bloat
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_MAX_ERROR_LENGTH = 500
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def _get_db_session():
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"""Return a new SQLAlchemy session (lazy import to avoid startup issues)."""
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global _db_session_factory # noqa: PLW0603
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if _db_session_factory is None:
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from app.database import SessionLocal
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_db_session_factory = SessionLocal
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return _db_session_factory()
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logger = logging.getLogger(__name__)
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# Initialize Redis connection using Celery's Redis settings
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redis_client = redis.StrictRedis.from_url(settings.redis_url, decode_responses=True)
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def _decrypt_imap_password(password: str | None) -> str | None:
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"""Decrypt an IMAP account password stored in the database.
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Passwords are stored encrypted (Fernet, ``enc:`` prefix) for new records;
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legacy plaintext records are returned unchanged so existing accounts
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continue to work until they are next updated via the API.
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"""
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from app.utils.encryption import decrypt_value
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return decrypt_value(password)
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LOCK_KEY = "imap_lock" # Unique key for locking
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LOCK_EXPIRE = 300 # Lock expires in 5 minutes
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# Local cache file for tracking processed emails
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CACHE_FILE = os.path.join(settings.workdir, "processed_mails.json")
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def acquire_lock():
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"""Attempt to acquire a Redis-based lock. If acquired, set an expiration."""
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lock_acquired = redis_client.setnx(LOCK_KEY, "locked")
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if lock_acquired:
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redis_client.expire(LOCK_KEY, LOCK_EXPIRE)
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logger.info("Lock acquired for IMAP processing.")
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return True
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logger.warning("Lock already held. Skipping this cycle.")
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return False
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def release_lock():
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"""Release the lock by deleting the Redis key."""
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redis_client.delete(LOCK_KEY)
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logger.info("Lock released.")
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def load_processed_emails():
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"""Load the list of already processed emails from a local JSON file."""
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if os.path.exists(CACHE_FILE):
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try:
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with open(CACHE_FILE, "r") as f:
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processed_emails = json.load(f)
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processed_emails = cleanup_old_entries(processed_emails)
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return processed_emails
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except json.JSONDecodeError:
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logger.warning("Failed to decode JSON, resetting processed emails cache.")
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return {}
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return {}
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def save_processed_emails(processed_emails):
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"""Save the processed email IDs to a local JSON file."""
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with open(CACHE_FILE, "w") as f:
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json.dump(processed_emails, f, indent=4)
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def cleanup_old_entries(processed_emails):
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"""Remove entries older than 7 days from the cache to avoid infinite growth."""
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seven_days_ago = datetime.now(timezone.utc) - timedelta(days=7)
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valid_emails = {}
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for msg_id, date_str in processed_emails.items():
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naive_dt = datetime.strptime(date_str, "%Y-%m-%dT%H:%M:%S")
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aware_dt = naive_dt.replace(tzinfo=timezone.utc)
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if aware_dt > seven_days_ago:
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valid_emails[msg_id] = date_str
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return valid_emails
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@shared_task
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def pull_all_inboxes():
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"""
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Periodic Celery task that checks all configured IMAP mailboxes
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and fetches attachments from new emails.
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Ensures only one instance runs at a time using Redis-based locking.
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Processes:
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1. System-level mailboxes configured via environment variables (IMAP1, IMAP2).
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2. Per-user IMAP accounts stored in the ``user_imap_accounts`` database table.
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"""
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if not acquire_lock():
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logger.info("Skipping execution: Another instance is running.")
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return
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try:
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logger.info("Starting pull_all_inboxes")
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# Mailbox #1 (non-Gmail)
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check_and_pull_mailbox(
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mailbox_key="imap1",
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host=settings.imap1_host,
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port=settings.imap1_port,
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username=settings.imap1_username,
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password=settings.imap1_password,
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use_ssl=settings.imap1_ssl,
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delete_after_process=settings.imap1_delete_after_process,
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)
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# Mailbox #2 (Gmail)
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check_and_pull_mailbox(
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mailbox_key="imap2",
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host=settings.imap2_host,
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port=settings.imap2_port,
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username=settings.imap2_username,
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password=settings.imap2_password,
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use_ssl=settings.imap2_ssl,
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delete_after_process=settings.imap2_delete_after_process,
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)
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# Per-user IMAP accounts from the database
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_pull_user_imap_accounts()
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# Per-user IMAP integrations from the UserIntegration model
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_pull_user_integration_imap()
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logger.info("Finished pull_all_inboxes")
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finally:
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release_lock()
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def _pull_user_imap_accounts() -> None:
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"""Iterate over all active per-user IMAP accounts and pull their inboxes."""
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try:
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from app.models import UserImapAccount
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db = _get_db_session()
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try:
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accounts = db.query(UserImapAccount).filter(UserImapAccount.is_active.is_(True)).all()
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logger.info("Processing %d per-user IMAP account(s)", len(accounts))
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for acct in accounts:
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# Use a descriptive identifier for logging and processed-email cache keys
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account_identifier = f"user_{acct.owner_id}_{acct.id}"
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try:
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pull_inbox(
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mailbox_key=account_identifier,
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host=acct.host,
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port=acct.port,
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username=acct.username,
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password=_decrypt_imap_password(acct.password),
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use_ssl=acct.use_ssl,
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delete_after_process=acct.delete_after_process,
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owner_id=acct.owner_id,
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)
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# Record successful poll
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acct.last_checked_at = datetime.now(timezone.utc)
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acct.last_error = None
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db.commit()
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except Exception as exc: # noqa: BLE001
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error_msg = str(exc)[:_MAX_ERROR_LENGTH]
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logger.error(
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"Error pulling user IMAP account %d (%s@%s): %s",
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acct.id,
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acct.username,
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acct.host,
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error_msg,
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)
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try:
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acct.last_checked_at = datetime.now(timezone.utc)
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acct.last_error = error_msg
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db.commit()
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except Exception: # noqa: BLE001
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db.rollback()
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finally:
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db.close()
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except Exception as exc: # noqa: BLE001
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logger.error("Failed to process per-user IMAP accounts: %s", exc)
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def _pull_user_integration_imap() -> None:
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"""Iterate over all active IMAP UserIntegrations and pull their inboxes.
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This polls the ``user_integrations`` table for records with
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``integration_type='IMAP'``, ``direction='SOURCE'``, and ``is_active=True``.
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Each integration's config/credentials are decoded and passed to
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:func:`pull_inbox` with the owning user's ``owner_id`` so that ingested
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documents are correctly attributed.
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Individual connection failures are caught and recorded on the integration
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without crashing the polling loop.
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"""
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try:
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import json as _json
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from app.models import IntegrationDirection, IntegrationType, UserIntegration
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from app.utils.encryption import decrypt_value
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db = _get_db_session()
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try:
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integrations = (
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db.query(UserIntegration)
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.filter(
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UserIntegration.integration_type == IntegrationType.IMAP,
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UserIntegration.direction == IntegrationDirection.SOURCE,
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UserIntegration.is_active.is_(True),
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)
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.all()
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)
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logger.info("Processing %d IMAP UserIntegration(s)", len(integrations))
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for integ in integrations:
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account_identifier = f"integration_{integ.owner_id}_{integ.id}"
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try:
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cfg = _json.loads(integ.config) if integ.config else {}
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raw_creds = decrypt_value(integ.credentials) if integ.credentials else None
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creds = _json.loads(raw_creds) if raw_creds else {}
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host = cfg.get("host")
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port = int(cfg.get("port", 993))
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username = cfg.get("username")
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password = creds.get("password")
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use_ssl = cfg.get("use_ssl", True)
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delete_after = cfg.get("delete_after_process", False)
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gmail_labels = cfg.get("gmail_apply_labels", True)
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if not (host and username and password):
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logger.warning(
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"IMAP integration %d (owner %s) has incomplete config — skipping.",
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integ.id,
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integ.owner_id,
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)
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continue
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pull_inbox(
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mailbox_key=account_identifier,
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host=host,
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port=port,
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username=username,
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password=password,
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use_ssl=use_ssl,
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delete_after_process=delete_after,
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owner_id=integ.owner_id,
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gmail_apply_labels=gmail_labels,
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)
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integ.last_used_at = datetime.now(timezone.utc)
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integ.last_error = None
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db.commit()
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except Exception as exc: # noqa: BLE001
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error_msg = str(exc)[:_MAX_ERROR_LENGTH]
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logger.error(
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"Error pulling IMAP integration %d (owner %s): %s",
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integ.id,
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integ.owner_id,
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error_msg,
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)
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try:
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integ.last_used_at = datetime.now(timezone.utc)
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integ.last_error = error_msg
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db.commit()
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except Exception: # noqa: BLE001
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db.rollback()
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finally:
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db.close()
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except Exception as exc: # noqa: BLE001
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logger.error("Failed to process IMAP UserIntegrations: %s", exc)
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def check_and_pull_mailbox(
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mailbox_key: str,
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host: str | None,
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port: int | None,
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username: str | None,
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password: str | None,
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use_ssl: bool,
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delete_after_process: bool,
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):
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"""Validates config and invokes pulling from the mailbox if valid."""
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if not (host and port and username and password):
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logger.warning(f"Mailbox {mailbox_key} is missing config, skipping.")
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return
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logger.info(f"Checking mailbox: {mailbox_key}")
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pull_inbox(
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mailbox_key=mailbox_key,
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host=host,
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port=port,
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username=username,
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password=password,
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use_ssl=use_ssl,
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delete_after_process=delete_after_process,
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)
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def pull_inbox(
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mailbox_key,
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host,
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port,
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username,
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password,
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use_ssl,
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delete_after_process,
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owner_id=None,
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gmail_apply_labels=True,
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):
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"""
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Connects to the IMAP inbox, fetches new unread emails from the last 3 days,
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and processes attachments while preserving the original unread status.
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For Gmail:
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- Attempts to select the localized All Mail folder.
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- Runs an X-GM-RAW query: "in:anywhere in:unread newer_than:3d has:attachment".
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For non-Gmail mailboxes, it falls back to selecting the INBOX with a SINCE/UNSEEN filter.
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Args:
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owner_id: Optional user identifier. When provided, ingested documents are
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attributed to this user via ``process_document`` / ``convert_to_pdf``.
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gmail_apply_labels: Whether to apply Gmail-specific labels and stars to
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processed emails. Only relevant for Gmail hosts. Defaults to True.
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"""
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logger.info("Connecting to %s at %s:%s (SSL=%s)", mailbox_key, host, port, use_ssl)
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processed_emails = load_processed_emails()
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try:
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mail = imaplib.IMAP4_SSL(host, port) if use_ssl else imaplib.IMAP4(host, port)
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mail.login(username, password)
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is_gmail_host = "gmail" in host.lower()
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if is_gmail_host:
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# For Gmail, try to select the localized All Mail folder.
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all_mail_folder = find_all_mail_folder(mail)
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if all_mail_folder:
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logger.info("Using Gmail All Mail folder: %s", all_mail_folder)
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mail.select(f'"{all_mail_folder}"')
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else:
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logger.warning("Gmail All Mail folder not found, falling back to INBOX.")
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mail.select("INBOX")
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# Use the X-GM-RAW query for Gmail.
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raw_query = "in:anywhere in:unread newer_than:3d has:attachment"
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status, search_data = mail.search(None, "X-GM-RAW", f'"{raw_query}"')
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else:
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# For non-Gmail, select INBOX and use SINCE/UNSEEN query.
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mail.select("INBOX")
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since_date = (datetime.now(timezone.utc) - timedelta(days=3)).strftime("%d-%b-%Y")
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status, search_data = mail.search(None, f"(SINCE {since_date} UNSEEN)")
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if status != "OK":
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logger.warning("Search failed on mailbox %s. Status=%s", mailbox_key, status)
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mail.close()
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mail.logout()
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return
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msg_numbers = search_data[0].split()
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logger.info("Found %d unread emails in %s.", len(msg_numbers), mailbox_key)
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for num in msg_numbers:
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status, msg_data = mail.fetch(num, "(RFC822)")
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if status != "OK":
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logger.warning("Failed to fetch message %s in %s. Status=%s", num, mailbox_key, status)
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continue
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raw_email = msg_data[0][1]
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email_message = email.message_from_bytes(raw_email)
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msg_id = email_message.get("Message-ID")
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if not msg_id:
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logger.warning("Skipping email without Message-ID in %s", mailbox_key)
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continue
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if msg_id in processed_emails:
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logger.info("Skipping already processed email %s in %s", msg_id, mailbox_key)
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continue
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# For Gmail, check if the email already has the "Ingested" label.
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if is_gmail_host and gmail_apply_labels:
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if email_already_has_label(mail, num, "Ingested"):
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logger.info("Skipping email %s in %s, already labeled 'Ingested'.", msg_id, mailbox_key)
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continue
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# Process attachments (and convert non-PDF files).
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# We call the function without assigning its return value since it is not used.
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fetch_attachments_and_enqueue(email_message, owner_id=owner_id)
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if settings.imap_readonly_mode:
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logger.info("Readonly mode: skipping mailbox modifications for %s in %s", msg_id, mailbox_key)
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else:
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if is_gmail_host and gmail_apply_labels:
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mark_as_processed_with_star(mail, num)
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mark_as_processed_with_label(mail, num, label="Ingested")
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if delete_after_process:
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logger.info("Deleting message %s from %s", num.decode(), mailbox_key)
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mail.store(num, "+FLAGS", "\\Deleted")
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else:
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mail.store(num, "-FLAGS", "\\Seen")
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processed_emails[msg_id] = datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%S")
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save_processed_emails(processed_emails)
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if not settings.imap_readonly_mode and delete_after_process:
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mail.expunge()
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mail.close()
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mail.logout()
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logger.info("Finished processing mailbox %s", mailbox_key)
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except Exception as e:
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logger.exception("Error pulling mailbox %s: %s", mailbox_key, e)
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def fetch_attachments_and_enqueue(email_message, owner_id: str | None = None):
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"""
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Extracts attachments from the email and processes only allowed file types.
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Files are accepted if either:
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1. They have a MIME type from the ALLOWED_MIME_TYPES set, OR
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2. They have a '.pdf' file extension (regardless of MIME type)
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Allowed file types include:
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- PDF: application/pdf or *.pdf extension
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- Microsoft Office files:
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- Word: application/msword,
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application/vnd.openxmlformats-officedocument.wordprocessingml.document
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- Excel: application/vnd.ms-excel,
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application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
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- PowerPoint: application/vnd.ms-powerpoint,
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application/vnd.openxmlformats-officedocument.presentationml.presentation
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- Other meaningful attachments:
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- Plain text: text/plain
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- CSV: text/csv
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- Rich Text Format: application/rtf, text/rtf
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If the attachment is a PDF (by extension or MIME type), it is enqueued for upload;
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any other allowed file is enqueued for conversion to PDF.
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Args:
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email_message: The parsed email message to extract attachments from.
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owner_id: Optional user identifier forwarded to ``process_document`` /
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``convert_to_pdf`` for multi-tenant attribution.
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Returns True if at least one allowed attachment was processed.
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"""
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has_attachment = False
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for part in email_message.walk():
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if part.get_content_maintype() == "multipart":
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continue
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filename = part.get_filename()
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if not filename:
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continue
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# Check if it's a PDF file by extension, regardless of MIME type
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is_pdf_by_extension = filename.lower().endswith(".pdf")
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mime_type = part.get_content_type()
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file_ext = os.path.splitext(filename)[1].lower()
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# Accept file if it has an allowed MIME type, an allowed extension, OR is a PDF by extension
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if mime_type not in ALLOWED_MIME_TYPES and file_ext not in ALLOWED_EXTENSIONS and not is_pdf_by_extension:
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logger.info("Skipping attachment %s with MIME type %s", filename, mime_type)
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continue
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file_path = os.path.join(settings.workdir, filename)
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with open(file_path, "wb") as f:
|
|
f.write(part.get_payload(decode=True))
|
|
|
|
# If it's a PDF by MIME type or extension, process it directly
|
|
if mime_type == "application/pdf" or is_pdf_by_extension:
|
|
process_document.delay(file_path, owner_id=owner_id)
|
|
logger.info("Enqueued PDF for upload: %s (MIME: %s)", filename, mime_type)
|
|
elif mime_type in ALLOWED_MIME_TYPES:
|
|
# Other allowed files are sent for conversion
|
|
convert_to_pdf.delay(file_path, owner_id=owner_id)
|
|
logger.info("Enqueued file for conversion to PDF: %s", filename)
|
|
|
|
has_attachment = True
|
|
return has_attachment
|
|
|
|
|
|
def email_already_has_label(mail, msg_id, label="Ingested"):
|
|
"""
|
|
Checks if the given message (msg_id) has the specified Gmail label.
|
|
Returns True if the label is found, False otherwise.
|
|
"""
|
|
try:
|
|
# Convert msg_id to bytes if it's an integer
|
|
if isinstance(msg_id, int):
|
|
msg_id = str(msg_id).encode()
|
|
|
|
label_status, label_data = mail.fetch(msg_id, "(X-GM-LABELS)")
|
|
if label_status == "OK" and label_data and len(label_data) > 0:
|
|
raw_labels = label_data[0][1].decode("utf-8", errors="ignore")
|
|
if label in raw_labels:
|
|
return True
|
|
except Exception as e:
|
|
logger.error("Failed to fetch labels for msg_id=%s: %s", msg_id, e)
|
|
return False
|
|
|
|
|
|
def mark_as_processed_with_star(mail, msg_id):
|
|
"""Stars the email in Gmail."""
|
|
try:
|
|
mail.store(msg_id, "+FLAGS", "\\Flagged")
|
|
logger.info("Email %s starred in Gmail.", msg_id)
|
|
except Exception as e:
|
|
logger.error("Failed to star email %s: %s", msg_id, e)
|
|
|
|
|
|
def mark_as_processed_with_label(mail, msg_id, label="Ingested"):
|
|
"""Adds a custom label to the email in Gmail."""
|
|
try:
|
|
mail.store(msg_id, "+X-GM-LABELS", label)
|
|
logger.info("Email %s labeled '%s' in Gmail.", msg_id, label)
|
|
except Exception as e:
|
|
logger.error("Failed to label email %s with %s: %s", msg_id, label, e)
|
|
|
|
|
|
def find_all_mail_folder(mail):
|
|
"""
|
|
Attempts to select the Gmail All Mail folder using known localized names.
|
|
Falls back to using XLIST if needed.
|
|
Returns the folder name if found, otherwise None.
|
|
"""
|
|
COMMON_ALL_MAIL_NAMES = [
|
|
"[Gmail]/Alle Nachrichten",
|
|
"[Gmail]/All Mail",
|
|
"[Gmail]/Todos",
|
|
"[Gmail]/Tutte le mail",
|
|
"[Gmail]/Tous les messages",
|
|
]
|
|
for candidate in COMMON_ALL_MAIL_NAMES:
|
|
status, _ = mail.select(f'"{candidate}"', readonly=True)
|
|
if status == "OK":
|
|
return candidate
|
|
|
|
capabilities = get_capabilities(mail)
|
|
if "XLIST" in capabilities:
|
|
candidate = find_all_mail_xlist(mail)
|
|
if candidate:
|
|
return candidate
|
|
return None
|
|
|
|
|
|
def get_capabilities(mail):
|
|
"""Returns a list of capabilities supported by the IMAP server."""
|
|
typ, data = mail.capability()
|
|
if typ == "OK" and data:
|
|
caps = data[0].decode("utf-8", errors="ignore").upper().split()
|
|
return caps
|
|
return []
|
|
|
|
|
|
def find_all_mail_xlist(mail):
|
|
"""
|
|
Uses XLIST to discover the mailbox flagged as All Mail.
|
|
Returns the folder name if found, otherwise None.
|
|
"""
|
|
tag = mail._new_tag().decode("ascii")
|
|
command_str = f'{tag} XLIST "" "*"'
|
|
mail.send((command_str + "\r\n").encode("utf-8"))
|
|
|
|
all_mail_folder = None
|
|
while True:
|
|
line = mail.readline()
|
|
if not line:
|
|
break
|
|
line_str = line.decode("utf-8", errors="ignore").strip()
|
|
if line_str.upper().startswith("* XLIST ") and "\\ALLMAIL" in line_str.upper():
|
|
match = re.search(r'"([^"]+)"$', line_str)
|
|
if match:
|
|
candidate = match.group(1)
|
|
logger.info("Found All Mail folder via XLIST: %s", candidate)
|
|
all_mail_folder = candidate
|
|
if line_str.startswith(tag):
|
|
break
|
|
return all_mail_folder
|