copilot-swe-agent[bot]
88fac1d8dd
Agent-Logs-Url: https://github.com/christianlouis/InboxConverge/sessions/3f1ca3bd-627e-4c78-a652-0262d63638fc Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
635 lines
28 KiB
Python
635 lines
28 KiB
Python
"""
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Celery tasks for background email processing.
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"""
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import asyncio
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import email as email_lib
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import time
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from datetime import datetime, timedelta, timezone
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from celery import Task
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import logging
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from app.workers.celery_app import celery_app
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from app.core.database import async_session_maker, engine
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from app.core.security import decrypt_credential, encrypt_credential
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from app.core.metrics import (
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MAIL_PROCESSING_RUNS_TOTAL,
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MAIL_PROCESSING_EMAILS_TOTAL,
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MAIL_PROCESSING_DURATION_SECONDS,
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ACTIVE_MAIL_ACCOUNTS,
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GMAIL_CREDENTIALS_INVALIDATED_TOTAL,
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CELERY_TASKS_TOTAL,
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CELERY_TASK_DURATION_SECONDS,
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)
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from app.models.database_models import (
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MailAccount,
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ProcessingRun,
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ProcessingLog,
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AccountStatus,
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DeliveryMethod,
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GmailCredential,
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DownloadedMessageId,
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UserSmtpConfig,
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)
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from app.services.mail_processor import MailProcessor
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from app.services.gmail_service import GmailService
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from app.services.config_service import ConfigService
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from app.services.notification_service import send_user_notification
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from app.core.config import settings
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from sqlalchemy import select, delete
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logger = logging.getLogger(__name__)
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def _as_utc(dt: datetime) -> datetime:
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"""Return *dt* with UTC tzinfo, attaching it if the datetime is naive."""
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if dt.tzinfo is None:
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return dt.replace(tzinfo=timezone.utc)
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return dt
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class AsyncTask(Task):
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"""Base task class that handles async operations"""
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def __call__(self, *args, **kwargs):
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"""Run async task in event loop"""
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async def _run():
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try:
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return await self.run(*args, **kwargs)
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finally:
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# Dispose the connection pool before the event loop closes.
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# Each asyncio.run() creates a fresh event loop; if pooled
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# asyncpg connections are still open when the loop is torn
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# down, asyncpg raises "Exception terminating connection".
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# Disposing the engine here closes those connections cleanly
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# inside the same loop, before asyncio.run() shuts it down.
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await engine.dispose()
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return asyncio.run(_run())
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@celery_app.task(base=AsyncTask, name="app.workers.tasks.process_mail_account")
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async def process_mail_account(account_id: int):
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"""
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Process a single mail account - fetch and forward emails.
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Args:
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account_id: ID of mail account to process
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"""
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_task_start = time.monotonic()
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async with async_session_maker() as db:
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try:
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# Get account
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result = await db.execute(
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select(MailAccount).where(MailAccount.id == account_id)
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)
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account = result.scalar_one_or_none()
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if not account or not account.is_enabled:
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logger.warning(f"Account {account_id} not found or disabled")
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return
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# Capture start time in a local variable so the error handler can
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# compute duration_seconds without touching the (expired) ORM
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# attribute after a session rollback.
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_run_started_at = datetime.now(timezone.utc)
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# Create processing run
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run = ProcessingRun(
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mail_account_id=account.id,
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started_at=_run_started_at,
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status="running",
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)
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db.add(run)
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await db.commit()
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await db.refresh(run)
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# Decrypt password
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password = decrypt_credential(account.encrypted_password) # type: ignore[arg-type]
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# Load already-downloaded UIDs to prevent re-processing
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seen_result = await db.execute(
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select(DownloadedMessageId.message_uid).where(
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DownloadedMessageId.mail_account_id == account.id
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)
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)
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already_seen_uids = set(seen_result.scalars().all())
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# Create processor
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processor = MailProcessor(account, password)
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# Fetch emails (returns raw bytes + new UIDs)
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emails, new_uids = await processor.fetch_emails(
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account.max_emails_per_check, # type: ignore[arg-type]
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already_seen_uids=already_seen_uids,
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)
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run.emails_fetched = len(emails) # type: ignore[assignment]
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MAIL_PROCESSING_EMAILS_TOTAL.labels(operation="fetched").inc(len(emails))
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# Forward emails
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emails_forwarded = 0
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emails_failed = 0
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# Determine delivery method
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use_gmail_api = account.delivery_method == DeliveryMethod.GMAIL_API
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gmail_service = None
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smtp_config = None
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if use_gmail_api:
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# Get user's Gmail credentials
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gmail_cred_result = await db.execute(
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select(GmailCredential).where(
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GmailCredential.user_id == account.user_id,
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GmailCredential.is_valid == True, # noqa: E712
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)
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)
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gmail_cred = gmail_cred_result.scalar_one_or_none()
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if gmail_cred:
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access_token = decrypt_credential(gmail_cred.encrypted_access_token) # type: ignore[arg-type]
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refresh_token = (
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decrypt_credential(gmail_cred.encrypted_refresh_token) # type: ignore[arg-type]
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if gmail_cred.encrypted_refresh_token
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else None
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)
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gmail_service = GmailService(
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access_token=access_token,
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refresh_token=refresh_token,
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client_id=settings.GOOGLE_CLIENT_ID,
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client_secret=settings.GOOGLE_CLIENT_SECRET,
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)
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else:
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logger.warning(
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f"Gmail API credentials not found for user {account.user_id}, "
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f"falling back to SMTP for account {account.id}"
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)
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use_gmail_api = False # type: ignore[assignment]
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if not use_gmail_api:
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# Fall back to SMTP – check per-user config first, then global
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user_smtp_result = await db.execute(
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select(UserSmtpConfig).where(
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UserSmtpConfig.user_id == account.user_id
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)
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)
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user_smtp = user_smtp_result.scalar_one_or_none()
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if user_smtp and user_smtp.username and user_smtp.encrypted_password:
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smtp_config = {
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"host": user_smtp.host,
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"port": user_smtp.port,
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"username": user_smtp.username,
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"password": decrypt_credential(user_smtp.encrypted_password), # type: ignore[arg-type]
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"use_tls": user_smtp.use_tls,
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}
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else:
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smtp_config = await ConfigService.get_smtp_config(db=db)
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if not smtp_config["username"] or not smtp_config["password"]:
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logger.error(
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f"SMTP credentials not configured for account {account.id}"
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)
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run.status = "failed" # type: ignore[assignment]
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run.error_message = "No delivery method configured (SMTP credentials missing and Gmail API not set up)" # type: ignore[assignment]
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run.completed_at = datetime.now(timezone.utc) # type: ignore[assignment]
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run.duration_seconds = ( # type: ignore[assignment]
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run.completed_at - _run_started_at
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).total_seconds()
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account.last_check_at = datetime.now(timezone.utc) # type: ignore[assignment]
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await db.commit()
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return
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successfully_forwarded_uids: list[str] = []
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if len(emails) != len(new_uids):
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logger.error(
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f"emails/uids length mismatch ({len(emails)} vs {len(new_uids)}) "
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f"for account {account.id}; truncating to shorter list"
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)
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# Field length limits matching the DB column definitions
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_MAX_SUBJECT_LEN = 500
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_MAX_FROM_LEN = 255
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for email_data, uid in zip(emails, new_uids):
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# ── Parse email metadata for logging ───────────────────────
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email_subject: str | None = None
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email_from: str | None = None
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try:
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msg = email_lib.message_from_bytes(email_data)
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raw_subject = msg.get("Subject", "") or ""
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email_subject = (
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raw_subject[:_MAX_SUBJECT_LEN] if raw_subject else None
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)
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raw_from = msg.get("From", "") or ""
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email_from = raw_from[:_MAX_FROM_LEN] if raw_from else None
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except (ValueError, TypeError, UnicodeDecodeError) as exc:
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logger.debug(
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"Could not parse email headers for account %s: %s",
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account.id,
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exc,
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)
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email_size_bytes = len(email_data)
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forwarded_ok = False
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error_msg: str | None = None
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try:
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if use_gmail_api and gmail_service:
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# Inject via Gmail API (preferred)
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label_ids = await gmail_service.build_import_label_ids(
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import_label_templates=gmail_cred.import_label_templates,
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source_email=account.email_address, # type: ignore[arg-type]
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)
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await gmail_service.inject_email(
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raw_email=email_data,
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label_ids=label_ids,
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source_account_name=account.name, # type: ignore[arg-type]
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)
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forwarded_ok = True
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emails_forwarded += 1
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successfully_forwarded_uids.append(uid)
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else:
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# Forward via SMTP (fallback)
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success = await MailProcessor.forward_email(
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email_data, account.name, account.forward_to, smtp_config # type: ignore[arg-type]
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)
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if success:
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forwarded_ok = True
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emails_forwarded += 1
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successfully_forwarded_uids.append(uid)
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else:
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emails_failed += 1
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except Exception as e:
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error_str = str(e).lower()
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# If Gmail returns 401/403 the refresh token was revoked –
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# mark credentials invalid so the user gets notified.
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if (
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use_gmail_api
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and gmail_cred
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and (
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"401" in error_str
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or "403" in error_str
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or "invalid_grant" in error_str
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)
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):
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gmail_cred.is_valid = False # type: ignore[assignment]
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GMAIL_CREDENTIALS_INVALIDATED_TOTAL.inc()
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logger.warning(
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f"Gmail credentials revoked for user {account.user_id}. "
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"User must re-authorise."
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)
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try:
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await send_user_notification(
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db=db,
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user_id=account.user_id,
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title="InboxRescue: Gmail Authorization Expired",
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body=f"Your Gmail credentials for account '{account.name}' have been revoked. Please re-authorize Gmail access in Settings.",
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notify_on_error=True,
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)
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except Exception as notify_exc:
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logger.warning(
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f"Failed to send revocation notification: {notify_exc}"
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)
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logger.error(f"Error delivering email: {e}")
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error_msg = str(e)
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emails_failed += 1
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# ── Write per-email ProcessingLog entry ─────────────────────
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db.add(
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ProcessingLog(
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user_id=account.user_id,
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mail_account_id=account.id,
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processing_run_id=run.id,
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level="INFO" if forwarded_ok else "ERROR",
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message=(
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f"Forwarded: {email_subject or '(no subject)'}"
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if forwarded_ok
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else f"Failed: {error_msg or 'delivery error'}"
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),
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email_subject=email_subject,
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email_from=email_from,
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email_size_bytes=email_size_bytes,
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success=forwarded_ok,
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error_details={"error": error_msg} if error_msg else None,
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)
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)
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# Persist new message UIDs so they are not processed again
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for uid in successfully_forwarded_uids:
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if uid not in already_seen_uids:
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db.add(
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DownloadedMessageId(
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mail_account_id=account.id,
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message_uid=uid,
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)
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)
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# If Gmail API was used, persist any refreshed access token back to
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# the DB so the next run doesn't need an extra token-refresh call.
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if use_gmail_api and gmail_service and gmail_cred:
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refreshed = gmail_service.get_refreshed_token()
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if refreshed and refreshed["access_token"] != access_token:
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gmail_cred.encrypted_access_token = encrypt_credential(refreshed["access_token"]) # type: ignore[assignment]
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if refreshed.get("expiry"):
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gmail_cred.token_expiry = refreshed["expiry"] # type: ignore[assignment]
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gmail_cred.last_verified_at = datetime.now(timezone.utc) # type: ignore[assignment]
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logger.info(
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f"Persisted refreshed Gmail access token for user {account.user_id}"
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)
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# Update run
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run.emails_forwarded = emails_forwarded # type: ignore[assignment]
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run.emails_failed = emails_failed # type: ignore[assignment]
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run.completed_at = datetime.now(timezone.utc) # type: ignore[assignment]
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run.duration_seconds = (
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run.completed_at - _as_utc(run.started_at)
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).total_seconds()
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run.status = "completed" if emails_failed == 0 else "partial_failure" # type: ignore[assignment]
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# Update account
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account.total_emails_processed += emails_forwarded # type: ignore[assignment]
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account.total_emails_failed += emails_failed # type: ignore[assignment]
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account.last_check_at = datetime.now(timezone.utc) # type: ignore[assignment]
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if emails_failed == 0:
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account.last_successful_check_at = datetime.now(timezone.utc) # type: ignore[assignment]
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account.status = AccountStatus.ACTIVE # type: ignore[assignment]
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else:
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account.status = AccountStatus.ERROR # type: ignore[assignment]
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account.last_error_at = datetime.now(timezone.utc) # type: ignore[assignment]
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account.last_error_message = f"{emails_failed} emails failed to forward" # type: ignore[assignment]
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try:
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await send_user_notification(
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db=db,
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user_id=account.user_id,
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title="InboxRescue: Mail Forwarding Failures",
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body=f"Mail account '{account.name}': {emails_failed} email(s) failed to forward.",
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notify_on_error=True,
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)
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except Exception as notify_exc:
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logger.warning(f"Failed to send notification: {notify_exc}")
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await db.commit()
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# Record Prometheus metrics for this completed run
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_run_status = "completed" if emails_failed == 0 else "partial_failure"
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MAIL_PROCESSING_RUNS_TOTAL.labels(status=_run_status).inc()
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MAIL_PROCESSING_EMAILS_TOTAL.labels(operation="forwarded").inc(
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emails_forwarded
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)
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MAIL_PROCESSING_EMAILS_TOTAL.labels(operation="failed").inc(emails_failed)
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_task_duration = time.monotonic() - _task_start
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MAIL_PROCESSING_DURATION_SECONDS.observe(_task_duration)
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CELERY_TASKS_TOTAL.labels(
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task_name="process_mail_account", status="success"
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).inc()
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CELERY_TASK_DURATION_SECONDS.labels(
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task_name="process_mail_account"
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).observe(_task_duration)
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logger.info(
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f"Processed account {account.id}: "
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f"{emails_forwarded} forwarded, {emails_failed} failed"
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)
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except Exception as e:
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logger.error(f"Error processing account {account_id}: {e}")
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# Record failure metric
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_task_duration = time.monotonic() - _task_start
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MAIL_PROCESSING_RUNS_TOTAL.labels(status="failed").inc()
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CELERY_TASKS_TOTAL.labels(
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task_name="process_mail_account", status="failure"
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).inc()
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CELERY_TASK_DURATION_SECONDS.labels(
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task_name="process_mail_account"
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).observe(_task_duration)
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# Mark run as failed – roll back any pending/broken transaction first
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# so the session is in a clean state before we write the failure status.
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try:
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await db.rollback()
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except Exception as rb_exc:
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logger.warning(f"Rollback failed during error handler: {rb_exc}")
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if "run" in locals():
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run.status = "failed" # type: ignore[assignment]
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run.error_message = str(e) # type: ignore[assignment]
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run.completed_at = datetime.now(timezone.utc) # type: ignore[assignment]
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# Use the locally-captured start time to avoid accessing an
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# expired ORM attribute after the session rollback above.
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run.duration_seconds = ( # type: ignore[assignment]
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run.completed_at - _run_started_at
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).total_seconds()
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# Update account error status
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if "account" in locals() and account is not None:
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account.status = AccountStatus.ERROR # type: ignore[assignment]
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account.last_error_at = datetime.now(timezone.utc) # type: ignore[assignment]
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account.last_error_message = str(e) # type: ignore[assignment]
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# Always update last_check_at so process_all_enabled_accounts
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# throttles re-dispatch instead of queuing a new task every cycle.
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account.last_check_at = datetime.now(timezone.utc) # type: ignore[assignment]
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# Notify user about the error
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try:
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await send_user_notification(
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db=db,
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user_id=account.user_id,
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title="InboxRescue: Mail Processing Error",
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body=f"Error processing mail account '{account.name}': {e}",
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notify_on_error=True,
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)
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except Exception as notify_exc:
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logger.warning(
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f"Failed to send error notification: {notify_exc}"
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)
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try:
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await db.commit()
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except Exception as commit_exc:
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logger.error(
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f"Failed to persist failed status for run of account "
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f"{account_id}: {commit_exc}"
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)
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|
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@celery_app.task(base=AsyncTask, name="app.workers.tasks.process_all_enabled_accounts")
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async def process_all_enabled_accounts():
|
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"""
|
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Process all enabled mail accounts.
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This task is scheduled to run periodically.
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"""
|
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_task_start = time.monotonic()
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async with async_session_maker() as db:
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try:
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# Mark stale "running" runs as failed. A run is considered stale
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# when it has been in the "running" state longer than the Celery
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# hard time limit (30 min) plus a small buffer – this recovers from
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# worker crashes or SIGKILL events faster than waiting for the
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# daily cleanup_old_logs task.
|
||
stale_threshold = datetime.now(timezone.utc) - timedelta(minutes=35)
|
||
stale_result = await db.execute(
|
||
select(ProcessingRun).where(
|
||
ProcessingRun.status == "running",
|
||
ProcessingRun.started_at < stale_threshold,
|
||
)
|
||
)
|
||
stale_runs = stale_result.scalars().all()
|
||
for stale_run in stale_runs:
|
||
stale_run.status = "failed" # type: ignore[assignment]
|
||
stale_run.error_message = ( # type: ignore[assignment]
|
||
"Run timed out or worker was killed before completion"
|
||
)
|
||
stale_run.completed_at = datetime.now(timezone.utc) # type: ignore[assignment]
|
||
stale_run.duration_seconds = ( # type: ignore[assignment]
|
||
stale_run.completed_at - _as_utc(stale_run.started_at)
|
||
).total_seconds()
|
||
if stale_runs:
|
||
await db.commit()
|
||
logger.info(f"Marked {len(stale_runs)} stale processing runs as failed")
|
||
|
||
# Fetch all enabled accounts regardless of operational status so
|
||
# that accounts in ERROR state are retried automatically.
|
||
result = await db.execute(
|
||
select(MailAccount).where(
|
||
MailAccount.is_enabled == True, # noqa: E712
|
||
)
|
||
)
|
||
accounts = result.scalars().all()
|
||
|
||
logger.info(f"Processing {len(accounts)} enabled mail accounts")
|
||
ACTIVE_MAIL_ACCOUNTS.set(len(accounts))
|
||
|
||
# Process each account
|
||
for account in accounts:
|
||
# Check if it's time to check this account
|
||
if account.last_check_at:
|
||
time_since_last_check = (
|
||
datetime.now(timezone.utc) - account.last_check_at
|
||
)
|
||
if time_since_last_check.total_seconds() < (
|
||
account.check_interval_minutes * 60
|
||
):
|
||
logger.debug(f"Skipping account {account.id} - not time yet")
|
||
continue
|
||
|
||
# Queue processing task
|
||
process_mail_account.delay(account.id)
|
||
|
||
_task_duration = time.monotonic() - _task_start
|
||
CELERY_TASKS_TOTAL.labels(
|
||
task_name="process_all_enabled_accounts", status="success"
|
||
).inc()
|
||
CELERY_TASK_DURATION_SECONDS.labels(
|
||
task_name="process_all_enabled_accounts"
|
||
).observe(_task_duration)
|
||
|
||
except Exception as e:
|
||
logger.error(f"Error processing accounts: {e}")
|
||
_task_duration = time.monotonic() - _task_start
|
||
CELERY_TASKS_TOTAL.labels(
|
||
task_name="process_all_enabled_accounts", status="failure"
|
||
).inc()
|
||
CELERY_TASK_DURATION_SECONDS.labels(
|
||
task_name="process_all_enabled_accounts"
|
||
).observe(_task_duration)
|
||
|
||
|
||
@celery_app.task(base=AsyncTask, name="app.workers.tasks.cleanup_old_logs")
|
||
async def cleanup_old_logs(days_to_keep: int = 30):
|
||
"""
|
||
Clean up old processing logs, runs, and downloaded message ID records.
|
||
Also marks stale "running" runs (older than the Celery task time-limit)
|
||
as "failed" to recover from worker crashes or SIGKILL events.
|
||
|
||
Args:
|
||
days_to_keep: Number of days of data to retain
|
||
"""
|
||
_task_start = time.monotonic()
|
||
async with async_session_maker() as db:
|
||
try:
|
||
cutoff_date = datetime.now(timezone.utc) - timedelta(days=days_to_keep)
|
||
|
||
# Mark stale "running" runs as "failed".
|
||
# A run is considered stale when it has been in the "running" state
|
||
# for longer than the Celery hard time limit (30 min) plus a small
|
||
# buffer – meaning the worker was likely killed before it could write
|
||
# the final status (OOM kill, container restart, SIGKILL, etc.).
|
||
stale_threshold = datetime.now(timezone.utc) - timedelta(minutes=35)
|
||
stale_result = await db.execute(
|
||
select(ProcessingRun).where(
|
||
ProcessingRun.status == "running",
|
||
ProcessingRun.started_at < stale_threshold,
|
||
)
|
||
)
|
||
stale_runs = stale_result.scalars().all()
|
||
for stale_run in stale_runs:
|
||
stale_run.status = "failed" # type: ignore[assignment]
|
||
stale_run.error_message = ( # type: ignore[assignment]
|
||
"Run timed out or worker was killed before completion"
|
||
)
|
||
stale_run.completed_at = datetime.now(timezone.utc) # type: ignore[assignment]
|
||
stale_run.duration_seconds = ( # type: ignore[assignment]
|
||
stale_run.completed_at - _as_utc(stale_run.started_at)
|
||
).total_seconds()
|
||
|
||
if stale_runs:
|
||
logger.info(f"Marked {len(stale_runs)} stale processing runs as failed")
|
||
|
||
# Delete old processing runs
|
||
result = await db.execute(
|
||
select(ProcessingRun).where(ProcessingRun.started_at < cutoff_date)
|
||
)
|
||
old_runs = result.scalars().all()
|
||
|
||
for run in old_runs:
|
||
await db.delete(run)
|
||
|
||
# Delete old processing logs
|
||
result = await db.execute(
|
||
select(ProcessingLog).where(ProcessingLog.timestamp < cutoff_date)
|
||
)
|
||
old_logs = result.scalars().all()
|
||
|
||
for log in old_logs:
|
||
await db.delete(log)
|
||
|
||
# Delete old downloaded message ID records so the table doesn't
|
||
# grow unboundedly for accounts that never delete messages.
|
||
await db.execute(
|
||
delete(DownloadedMessageId).where(
|
||
DownloadedMessageId.downloaded_at < cutoff_date
|
||
)
|
||
)
|
||
|
||
await db.commit()
|
||
|
||
logger.info(
|
||
f"Cleaned up {len(old_runs)} old processing runs and "
|
||
f"{len(old_logs)} old logs"
|
||
)
|
||
|
||
_task_duration = time.monotonic() - _task_start
|
||
CELERY_TASKS_TOTAL.labels(
|
||
task_name="cleanup_old_logs", status="success"
|
||
).inc()
|
||
CELERY_TASK_DURATION_SECONDS.labels(task_name="cleanup_old_logs").observe(
|
||
_task_duration
|
||
)
|
||
|
||
except Exception as e:
|
||
logger.error(f"Error cleaning up logs: {e}")
|
||
_task_duration = time.monotonic() - _task_start
|
||
CELERY_TASKS_TOTAL.labels(
|
||
task_name="cleanup_old_logs", status="failure"
|
||
).inc()
|
||
CELERY_TASK_DURATION_SECONDS.labels(task_name="cleanup_old_logs").observe(
|
||
_task_duration
|
||
)
|