Sending: a send the server could not take (unreachable, timeout, 4xx) is no
longer failed at once. It waits in Scheduled ("retrying") and is tried again
after 1, 2, 5, 10, 30 min, then hourly, for 24 hours — on the server, so it
works with the browser closed. A permanent refusal (5xx, wrong password) is
"failed" at once, with the server's reason. GET /outbox lists both;
POST /outbox/{id}/retry (Retry now) and /cancel (Edit, Delete) act on them,
and they are left out of Drafts. Mail delivered but not filed in Sent now
counts as sent, and a conditional claim keeps two jobs from sending one
message twice. The app says when a send failed and when it finally went.
Actions: arq retries a job only on Retry, never on a plain exception, so the
"retry x5, then revert" for flags and moves never happened. Flag, move,
archive, restore, delete and empty-folder jobs now raise Retry while the
server is unreachable (~24 hours of growing gaps), skip a change a later one
replaced, stop at the first connection failure instead of 20 s per message,
and delete/empty keep the rows until the server has the messages gone.
Account health: 3 failed connections in a row mark an account unreachable
(amber in the sidebar and Settings, cleared on the next success); 3 refused
sign-ins stop its syncing as auth_failed until the password is entered
again, so the provider does not lock the account. Sync loops back off 30 s
doubling to 10 min and log one line per expected failure; a refused
connection fails at once with its reason (the connect task is kept), and a
silently dead IDLE connection is noticed within ~11 min instead of ~29.
Also: the empty reading pane is clipped to its width when dragged very
narrow; tests no longer leave live accounts and outbox rows in the database.
Migration 0021: outbox attempts / next_attempt_at / retry_until, accounts
sync_error / sync_error_since.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
601 lines
25 KiB
Python
601 lines
25 KiB
Python
"""Outbound user actions: flag changes and moves (SPEC §6.3).
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The API writes the change to the DB first, then enqueues a job here to push it to
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the mail server. While the server cannot be reached the job is retried (arq
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``Retry``) with growing gaps for about 24 hours (``ACTION_MAX_TRIES``); a flag
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change that still cannot be pushed is then reverted in the DB and announced with
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``flags.changed`` / ``reverted=true`` so the UI rolls back. A plain exception does
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NOT make arq retry — only ``Retry`` does.
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"""
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from __future__ import annotations
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import logging
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import uuid
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from collections import defaultdict
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from collections.abc import Iterable
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from datetime import UTC, datetime, timedelta
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from typing import Any
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from arq import Retry
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from sqlalchemy import delete, func, select, update
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.config import get_settings
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from app.db import session_scope
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from app.events import get_event_bus
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from app.models import Account, Draft, Mailbox, Message, Thread
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from app.sync.health import is_temporary
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from app.sync.provider_factory import build_provider
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from app.threading_.threader import denormalize_thread
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logger = logging.getLogger(__name__)
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# User-settable IMAP flags (SPEC §8.2 is:read/starred/answered). \Deleted/\Draft
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# are managed by move/expunge and drafts, not this surface.
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ALLOWED_FLAGS = frozenset({"\\Seen", "\\Flagged", "\\Answered"})
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# Gaps between tries while the server is unreachable: ~24 hours in all.
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_RETRY_DEFERS_S = (30, 60, 120, 300, 600, 1800, 3600, 7200, 14400, 28800, 28800)
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ACTION_MAX_TRIES = len(_RETRY_DEFERS_S) + 1
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def _retry_later(ctx: dict[str, Any], exc: BaseException) -> Retry | None:
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"""A ``Retry`` for a temporary failure while tries remain, else None (give up)."""
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if not is_temporary(exc):
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return None
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attempt = int(ctx.get("job_try", 1))
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if attempt >= ACTION_MAX_TRIES:
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return None
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logger.info(
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"server unreachable (try %d), retrying in %ds: %s",
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attempt,
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_RETRY_DEFERS_S[attempt - 1],
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exc,
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)
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return Retry(defer=_RETRY_DEFERS_S[attempt - 1])
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# Folder names to create when a target special-use folder is missing on the server.
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_DEFAULT_FOLDER_NAME = {"archive": "Archive", "trash": "Trash", "junk": "Spam"}
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# Moves into these folders record where the message came from (restore_mailbox_id)
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# so the Restore action can return it to its original folder.
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_REMOVAL_FOLDERS = frozenset({"archive", "trash", "junk"})
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def sanitize_flags(flags: Iterable[str]) -> frozenset[str]:
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return frozenset(f for f in flags if f in ALLOWED_FLAGS)
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async def apply_flags_to_messages(
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session: AsyncSession, messages: list[Message], add: frozenset[str], remove: frozenset[str]
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) -> set[uuid.UUID]:
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"""Apply a flag delta to messages in the DB and re-denormalize their threads."""
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thread_ids: set[uuid.UUID] = set()
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for message in messages:
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message.flags = sorted((set(message.flags) | add) - remove)
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if message.thread_id is not None:
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thread_ids.add(message.thread_id)
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await session.flush()
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for tid in thread_ids:
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await denormalize_thread(session, tid)
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return thread_ids
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# --- worker jobs -------------------------------------------------------------
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async def push_flags_job(
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ctx: dict[str, Any], message_id: str, add: list[str], remove: list[str]
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) -> None:
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"""Push a flag change to the mail server; revert the DB on final failure."""
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mid = uuid.UUID(message_id)
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async with session_scope() as session:
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message = await session.get(Message, mid)
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if message is None:
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return
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if _superseded(message.flags, add, remove):
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return # changed again since: that later change's own job pushes it
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account = await session.get(Account, message.account_id)
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mailbox = await session.get(Mailbox, message.mailbox_id)
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if account is None or mailbox is None:
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return
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user_id, uid, path = message.user_id, message.uid, mailbox.path
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provider = build_provider(account)
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try:
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await provider.push_flags(path, uid, frozenset(add), frozenset(remove))
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except Exception as exc:
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retry = _retry_later(ctx, exc)
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if retry is not None:
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raise retry from exc
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logger.warning("flag change for message %s could not be pushed: %s", mid, exc)
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await _revert_flags(mid, user_id, add, remove)
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finally:
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await provider.close()
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def _superseded(flags: list[str], add: list[str], remove: list[str]) -> bool:
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"""The message's flags no longer show this change: a later one replaced it
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(e.g. read, then unread again while the server was unreachable)."""
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now = set(flags)
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return not set(add) <= now or bool(set(remove) & now)
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async def _revert_flags(
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message_id: uuid.UUID, user_id: uuid.UUID, add: list[str], remove: list[str]
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) -> None:
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async with session_scope() as session:
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message = await session.get(Message, message_id)
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if message is None or _superseded(message.flags, add, remove):
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return
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# Undo the change: remove what we added, add back what we removed.
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message.flags = sorted((set(message.flags) - set(add)) | set(remove))
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await session.flush()
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if message.thread_id is not None:
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await denormalize_thread(session, message.thread_id)
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flags = list(message.flags)
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await get_event_bus().publish(
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"flags.changed",
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{"user_id": str(user_id), "message_id": str(message_id), "flags": flags, "reverted": True},
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)
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logger.warning("reverted flag change for message %s after push failures", message_id)
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async def move_job(
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ctx: dict[str, Any], message_id: str, dst_mailbox_id: str, src_mailbox_id: str
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) -> None:
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"""Move a message on the server; update its uid, or revert the DB on failure."""
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mid = uuid.UUID(message_id)
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dst_id = uuid.UUID(dst_mailbox_id)
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async with session_scope() as session:
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message = await session.get(Message, mid)
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if message is None:
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return
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account = await session.get(Account, message.account_id)
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dst = await session.get(Mailbox, dst_id)
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src = await session.get(Mailbox, uuid.UUID(src_mailbox_id))
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if account is None or dst is None or src is None:
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return
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src_path = src.path
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uid, dst_path, user_id = message.uid, dst.path, message.user_id
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# Carried into the event below: a consumer usually cares about the
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# transition, not the destination. "Now in Spam" and "moved out of Spam"
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# are different facts, and only the pair distinguishes them.
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src_special, dst_special = src.special_use, dst.special_use
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# The open reading panel is keyed by thread: without this the UI
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# invalidates the message list but never refetches the thread the user is
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# looking at, so a moved message stays on screen.
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thread_id = message.thread_id
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provider = build_provider(account)
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try:
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new_uid = await provider.move(uid, src_path, dst_path)
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except Exception as exc:
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retry = _retry_later(ctx, exc)
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if retry is not None:
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raise retry from exc
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logger.warning("move failed for message %s; leaving optimistic state: %s", mid, exc)
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return
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finally:
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await provider.close()
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async with session_scope() as session:
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message = await session.get(Message, mid)
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if message is not None:
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message.uid = new_uid
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message.mailbox_id = dst_id
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await get_event_bus().publish(
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"message.changed",
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{
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"user_id": str(user_id),
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"message_id": str(mid),
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"thread_id": str(thread_id) if thread_id else None,
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"mailbox_id": str(dst_id),
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"previous_mailbox_id": src_mailbox_id,
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"special_use": dst_special,
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"previous_special_use": src_special,
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},
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)
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async def move_thread_to_folder_job(ctx: dict[str, Any], thread_id: str, special_use: str) -> None:
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"""Move every message in a thread to each account's special-use folder.
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Creates the target folder (e.g. Archive) if the account doesn't have one.
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Used by the Archive and Delete (-> Trash) thread actions.
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"""
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tid = uuid.UUID(thread_id)
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async with session_scope() as session:
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messages = list(await session.scalars(select(Message).where(Message.thread_id == tid)))
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if not messages:
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return
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user_id = messages[0].user_id
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account_ids = list({m.account_id for m in messages})
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accounts = {
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a.id: a
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for a in await session.scalars(select(Account).where(Account.id.in_(account_ids)))
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}
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mailboxes = list(
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await session.scalars(select(Mailbox).where(Mailbox.account_id.in_(account_ids)))
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)
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path_by_id = {mb.id: mb.path for mb in mailboxes}
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target_by_account = {mb.account_id: mb for mb in mailboxes if mb.special_use == special_use}
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target_id_path = {mb.account_id: (mb.id, mb.path) for mb in target_by_account.values()}
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snapshot = [(m.id, m.account_id, m.mailbox_id, m.uid) for m in messages]
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# (message_id, account_id, target_path, new_uid) applied after the network moves.
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moves: list[tuple[uuid.UUID, uuid.UUID, str, int]] = []
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to_create: list[tuple[uuid.UUID, str, int]] = [] # account_id, path, uidvalidity
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unreachable: BaseException | None = None # set: retry the moves that did not happen
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for account_id in account_ids:
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provider = build_provider(accounts[account_id])
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try:
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try:
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if account_id in target_id_path:
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target_id, target_path = target_id_path[account_id]
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else:
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target_id, target_path = (
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None,
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_DEFAULT_FOLDER_NAME.get(special_use, special_use),
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)
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await provider.create_mailbox(target_path)
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remote = await provider.list_mailboxes()
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uidv = next((r.uidvalidity for r in remote if r.path == target_path), 0)
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to_create.append((account_id, target_path, uidv))
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for mid, m_account, m_mailbox, m_uid in snapshot:
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if m_account != account_id or m_mailbox == target_id:
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continue
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src_path = path_by_id.get(m_mailbox, "INBOX")
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try:
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new_uid = await provider.move(m_uid, src_path, target_path)
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except Exception as exc:
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if is_temporary(exc):
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raise # the server is gone: stop this account, retry it later
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logger.exception("move failed for message %s -> %s", mid, target_path)
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continue
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moves.append((mid, account_id, target_path, new_uid))
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except Exception as exc:
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if not is_temporary(exc):
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raise
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unreachable = exc
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finally:
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await provider.close()
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async with session_scope() as session:
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created: dict[tuple[uuid.UUID, str], uuid.UUID] = {}
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for account_id, path, uidv in to_create:
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mailbox = Mailbox(
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account_id=account_id,
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user_id=user_id,
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path=path,
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special_use=special_use,
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uidvalidity=uidv,
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)
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session.add(mailbox)
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await session.flush()
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created[(account_id, path)] = mailbox.id
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for mid, account_id, target_path, new_uid in moves:
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resolved = target_id_path.get(account_id, (None, ""))[0] or created.get(
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(account_id, target_path)
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)
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message = await session.get(Message, mid)
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if message is not None and resolved is not None:
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# Remember where it came from so Restore returns it there, not the Inbox.
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if special_use in _REMOVAL_FOLDERS and message.mailbox_id != resolved:
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message.restore_mailbox_id = message.mailbox_id
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message.mailbox_id = resolved
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message.uid = new_uid
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await get_event_bus().publish(
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"thread.updated", {"user_id": str(user_id), "thread_id": str(tid)}
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)
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# What moved is recorded; the rest goes again once the server is back (the
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# re-run skips messages already in the target folder).
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if unreachable is not None and (retry := _retry_later(ctx, unreachable)) is not None:
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raise retry from unreachable
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async def restore_thread_job(ctx: dict[str, Any], thread_id: str) -> None:
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"""Move every message in a thread back to its original folder (Restore action).
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Each message returns to ``restore_mailbox_id`` (the folder it was in before it
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was archived/trashed) — e.g. a deleted Sent message goes back to Sent. Messages
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with no recorded origin fall back to the account's Inbox.
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"""
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tid = uuid.UUID(thread_id)
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async with session_scope() as session:
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messages = list(await session.scalars(select(Message).where(Message.thread_id == tid)))
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if not messages:
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return
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user_id = messages[0].user_id
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account_ids = list({m.account_id for m in messages})
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accounts = {
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a.id: a
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for a in await session.scalars(select(Account).where(Account.id.in_(account_ids)))
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}
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mailboxes = list(
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await session.scalars(select(Mailbox).where(Mailbox.account_id.in_(account_ids)))
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)
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path_by_id = {mb.id: mb.path for mb in mailboxes}
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inbox_by_account = {mb.account_id: mb.id for mb in mailboxes if mb.special_use == "inbox"}
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# (message_id, account_id, source_path, target_id) — resolve the target now.
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plan: list[tuple[uuid.UUID, uuid.UUID, str, uuid.UUID, int]] = []
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for m in messages:
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target_id = m.restore_mailbox_id
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if target_id is None or target_id not in path_by_id:
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target_id = inbox_by_account.get(m.account_id)
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if target_id is None or target_id == m.mailbox_id:
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continue # nowhere to restore to, or already there
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plan.append(
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(m.id, m.account_id, path_by_id.get(m.mailbox_id, "INBOX"), target_id, m.uid)
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)
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# (message_id, target_id, new_uid) applied after the network moves.
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moves: list[tuple[uuid.UUID, uuid.UUID, int]] = []
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unreachable: BaseException | None = None
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for account_id in account_ids:
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provider = build_provider(accounts[account_id])
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try:
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for mid, m_account, src_path, target_id, uid in plan:
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if m_account != account_id:
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continue
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target_path = path_by_id[target_id]
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try:
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new_uid = await provider.move(uid, src_path, target_path)
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except Exception as exc:
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if is_temporary(exc):
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unreachable = exc # the server is gone: stop this account
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break
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logger.exception("restore move failed for message %s -> %s", mid, target_path)
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continue
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moves.append((mid, target_id, new_uid))
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finally:
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await provider.close()
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async with session_scope() as session:
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for mid, target_id, new_uid in moves:
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message = await session.get(Message, mid)
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if message is not None:
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message.mailbox_id = target_id
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message.uid = new_uid
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message.restore_mailbox_id = None
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await get_event_bus().publish(
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"thread.updated", {"user_id": str(user_id), "thread_id": str(tid)}
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)
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if unreachable is not None and (retry := _retry_later(ctx, unreachable)) is not None:
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raise retry from unreachable
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async def delete_thread_job(ctx: dict[str, Any], thread_id: str) -> None:
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"""Permanently delete every message in a thread (server EXPUNGE + DB rows).
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Used by the Trash folder's Delete action. Best-effort per message on the
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server; the DB rows (and cascaded attachments/body parts) are always removed.
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"""
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tid = uuid.UUID(thread_id)
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async with session_scope() as session:
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messages = list(await session.scalars(select(Message).where(Message.thread_id == tid)))
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if not messages:
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return
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user_id = messages[0].user_id
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account_ids = list({m.account_id for m in messages})
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accounts = {
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a.id: a
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for a in await session.scalars(select(Account).where(Account.id.in_(account_ids)))
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}
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mailboxes = list(
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await session.scalars(select(Mailbox).where(Mailbox.account_id.in_(account_ids)))
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)
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path_by_id = {mb.id: mb.path for mb in mailboxes}
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# (account_id, mailbox_path) -> [uids] to expunge on the server.
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by_box: dict[tuple[uuid.UUID, str], list[int]] = {}
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for m in messages:
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by_box.setdefault((m.account_id, path_by_id.get(m.mailbox_id, "INBOX")), []).append(
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m.uid
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)
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for account_id in account_ids:
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provider = build_provider(accounts[account_id])
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try:
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for (acct, path), uids in by_box.items():
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if acct != account_id:
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continue
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try:
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await provider.delete_messages(path, uids)
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except Exception as exc:
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# Keep the rows while the server is away: deleted here but
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|
# not there, the next sync would bring the messages back.
|
|
if (retry := _retry_later(ctx, exc)) is not None:
|
|
raise retry from exc
|
|
logger.warning("expunge failed for %s in %s: %s", uids, path, exc)
|
|
finally:
|
|
await provider.close()
|
|
|
|
async with session_scope() as session:
|
|
msgs = list(await session.scalars(select(Message).where(Message.thread_id == tid)))
|
|
msg_ids = [m.id for m in msgs]
|
|
# Drop draft references to the thread/messages (FKs lack ON DELETE CASCADE).
|
|
if msg_ids:
|
|
await session.execute(
|
|
update(Draft)
|
|
.where(Draft.reply_to_message_id.in_(msg_ids))
|
|
.values(reply_to_message_id=None)
|
|
)
|
|
await session.execute(update(Draft).where(Draft.thread_id == tid).values(thread_id=None))
|
|
for m in msgs:
|
|
await session.delete(m)
|
|
thread = await session.get(Thread, tid)
|
|
if thread is not None:
|
|
await session.delete(thread)
|
|
|
|
await get_event_bus().publish(
|
|
"thread.updated", {"user_id": str(user_id), "thread_id": str(tid)}
|
|
)
|
|
|
|
|
|
async def empty_folder_job(ctx: dict[str, Any], user_id: str, special_use: str) -> None:
|
|
"""Permanently delete every message in the user's folder of this special-use.
|
|
|
|
Backs the Trash/Spam/Archive "Empty" action: EXPUNGE on the server, drop the DB
|
|
rows, and re-denormalize (or delete) affected threads.
|
|
"""
|
|
uid = uuid.UUID(user_id)
|
|
async with session_scope() as session:
|
|
mailboxes = list(
|
|
await session.scalars(
|
|
select(Mailbox).where(Mailbox.user_id == uid, Mailbox.special_use == special_use)
|
|
)
|
|
)
|
|
if not mailboxes:
|
|
return
|
|
mb_ids = [mb.id for mb in mailboxes]
|
|
path_by_id = {mb.id: mb.path for mb in mailboxes}
|
|
messages = list(
|
|
await session.scalars(
|
|
select(Message).where(Message.user_id == uid, Message.mailbox_id.in_(mb_ids))
|
|
)
|
|
)
|
|
if not messages:
|
|
return
|
|
account_ids = list({m.account_id for m in messages})
|
|
accounts = {
|
|
a.id: a
|
|
for a in await session.scalars(select(Account).where(Account.id.in_(account_ids)))
|
|
}
|
|
thread_ids = list({m.thread_id for m in messages if m.thread_id is not None})
|
|
by_box: dict[tuple[uuid.UUID, str], list[int]] = {}
|
|
for m in messages:
|
|
by_box.setdefault((m.account_id, path_by_id[m.mailbox_id]), []).append(m.uid)
|
|
|
|
for account_id in account_ids:
|
|
provider = build_provider(accounts[account_id])
|
|
try:
|
|
for (acct, path), uids in by_box.items():
|
|
if acct != account_id:
|
|
continue
|
|
try:
|
|
await provider.delete_messages(path, uids)
|
|
except Exception as exc:
|
|
# As for a thread: keep the rows until the server has them gone.
|
|
if (retry := _retry_later(ctx, exc)) is not None:
|
|
raise retry from exc
|
|
logger.warning("empty folder: expunge failed for %s in %s: %s", uids, path, exc)
|
|
finally:
|
|
await provider.close()
|
|
|
|
async with session_scope() as session:
|
|
msgs = list(
|
|
await session.scalars(
|
|
select(Message).where(Message.user_id == uid, Message.mailbox_id.in_(mb_ids))
|
|
)
|
|
)
|
|
msg_ids = [m.id for m in msgs]
|
|
if msg_ids:
|
|
await session.execute(
|
|
update(Draft)
|
|
.where(Draft.reply_to_message_id.in_(msg_ids))
|
|
.values(reply_to_message_id=None)
|
|
)
|
|
for m in msgs:
|
|
await session.delete(m)
|
|
await session.flush()
|
|
# Threads with no messages left get dropped (drafts un-linked first); the
|
|
# rest are re-denormalized so their counts/snippet reflect the removal.
|
|
for tid in thread_ids:
|
|
remaining = await session.scalar(
|
|
select(func.count()).select_from(Message).where(Message.thread_id == tid)
|
|
)
|
|
if not remaining:
|
|
await session.execute(
|
|
update(Draft).where(Draft.thread_id == tid).values(thread_id=None)
|
|
)
|
|
await denormalize_thread(session, tid)
|
|
|
|
await get_event_bus().publish("message.deleted", {"user_id": str(uid)})
|
|
|
|
|
|
async def autopurge_trash_spam(ctx: dict[str, Any]) -> None:
|
|
"""Cron: permanently delete Trash/Spam messages older than the retention window.
|
|
|
|
Same mechanics as :func:`empty_folder_job` (server EXPUNGE, drop rows, re-denorm
|
|
threads) but scoped to messages whose internal date predates
|
|
``TRASH_RETENTION_DAYS`` — across every user/account. A no-op when retention is 0.
|
|
"""
|
|
days = get_settings().trash_retention_days
|
|
if days <= 0:
|
|
return
|
|
cutoff = datetime.now(UTC) - timedelta(days=days)
|
|
|
|
async with session_scope() as session:
|
|
stale = (
|
|
await session.execute(
|
|
select(
|
|
Message.id,
|
|
Message.user_id,
|
|
Message.account_id,
|
|
Message.uid,
|
|
Message.thread_id,
|
|
Mailbox.path,
|
|
)
|
|
.join(Mailbox, Mailbox.id == Message.mailbox_id)
|
|
.where(Mailbox.special_use.in_(_REMOVAL_FOLDERS), Message.internal_date < cutoff)
|
|
)
|
|
).all()
|
|
if not stale:
|
|
return
|
|
account_ids = {r.account_id for r in stale}
|
|
accounts = {
|
|
a.id: a
|
|
for a in await session.scalars(select(Account).where(Account.id.in_(account_ids)))
|
|
}
|
|
|
|
# Server-side EXPUNGE, grouped by (account, mailbox path).
|
|
by_box: dict[tuple[uuid.UUID, str], list[int]] = defaultdict(list)
|
|
for r in stale:
|
|
by_box[(r.account_id, r.path)].append(r.uid)
|
|
for account_id in account_ids:
|
|
account = accounts.get(account_id)
|
|
if account is None:
|
|
continue
|
|
provider = build_provider(account)
|
|
try:
|
|
for (acct, path), uids in by_box.items():
|
|
if acct != account_id:
|
|
continue
|
|
try:
|
|
await provider.delete_messages(path, uids)
|
|
except Exception:
|
|
logger.exception("autopurge: expunge failed for %s in %s", uids, path)
|
|
finally:
|
|
await provider.close()
|
|
|
|
# Drop the local rows and re-denormalize (or delete) affected threads.
|
|
msg_ids = [r.id for r in stale]
|
|
thread_ids = {r.thread_id for r in stale if r.thread_id is not None}
|
|
user_ids = {r.user_id for r in stale}
|
|
async with session_scope() as session:
|
|
await session.execute(
|
|
update(Draft)
|
|
.where(Draft.reply_to_message_id.in_(msg_ids))
|
|
.values(reply_to_message_id=None)
|
|
)
|
|
await session.execute(delete(Message).where(Message.id.in_(msg_ids)))
|
|
await session.flush()
|
|
for tid in thread_ids:
|
|
remaining = await session.scalar(
|
|
select(func.count()).select_from(Message).where(Message.thread_id == tid)
|
|
)
|
|
if not remaining:
|
|
await session.execute(
|
|
update(Draft).where(Draft.thread_id == tid).values(thread_id=None)
|
|
)
|
|
await denormalize_thread(session, tid)
|
|
|
|
bus = get_event_bus()
|
|
for user_id in user_ids:
|
|
await bus.publish("message.deleted", {"user_id": str(user_id)})
|
|
logger.info("autopurge: removed %d Trash/Spam message(s) older than %dd", len(msg_ids), days)
|