Files
webmail-client/backend/app/providers/base.py
T
lukasandClaude Opus 4.8 49738740c0 M2: Meili search + saved searches, sync windows + backfill progress, threading & image fixes
Search:
- Meilisearch backend (app/search/meili.py) + factory wiring; pinned SDK 2.7
- Search-as-you-type: debounced query + Postgres prefix matching, built from
  the DB tokenizer so full email addresses match (email stays one lexeme)
- Saved searches API + sidebar virtual mailboxes; save affordance in the box

Account sync windows (SPEC §12 M2):
- Choose at setup: All (recent 30d first, then remainder), Last 3 months, New only
- Per-account sync_window + "Sync remaining mail" from settings (idempotent re-run)
- Provider windowed backfill (SINCE/BEFORE), message_count, newest_uid
- migration 0012: accounts.sync_window + backfill_total/backfill_done

Backfill progress UX:
- Floating progress card (auto-dissolves after 10s) + spinning sidebar ring that
  fills with the account colour; driven by sync.progress over WS

Thread list pagination:
- Server-side offset + accurate grand total, with filter/order in SQL; working
  prev/next across all synced mail

Reading panel:
- "Load images" one-off now actually renders images (?images=1) without trusting
  the sender; envelope carries images_allowed so a trusted sender shows no prompt

Threading:
- Subject fallback no longer merges messages that declare an explicit (different)
  parent; true siblings still group via a shared-parent reference match. Fixes
  unrelated auto-replies with the same subject landing in one thread

Backend 257 tests green, ruff + mypy --strict clean; frontend tsc/eslint/vitest clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01U72FZiF1W1pb8XxyWBTREA
2026-07-23 23:00:08 +02:00

132 lines
3.9 KiB
Python

# INTERFACE VERSION: 1
"""MailProvider — the frozen provider contract (SPEC §5.1).
This signature is a frozen contract (SPEC instruction 5): implementations may
evolve, signatures may not without bumping the version comment above.
"""
from __future__ import annotations
from collections.abc import AsyncIterator
from dataclasses import dataclass
from datetime import date, datetime
from typing import Protocol
class ProviderError(Exception):
"""Base class for provider errors; carries a human-readable ``.detail``."""
def __init__(self, detail: str) -> None:
super().__init__(detail)
self.detail = detail
class ProviderAuthError(ProviderError):
"""Authentication failed (bad credentials / token)."""
class ProviderConnectError(ProviderError):
"""Could not connect / TLS / greeting failure."""
class ProviderNotSupported(ProviderError):
"""A capability (e.g. IDLE) is not supported by the server."""
@dataclass(frozen=True)
class RemoteMailbox:
path: str
special_use: str | None # "inbox"|"sent"|"drafts"|"trash"|"junk"|"archive"|None
uidvalidity: int
@dataclass(frozen=True)
class RemoteMessage:
uid: int
raw: bytes # full RFC822
flags: frozenset[str]
internal_date: datetime
@dataclass(frozen=True)
class FlagChange:
uid: int
flags: frozenset[str]
@dataclass(frozen=True)
class MailboxDelta:
new: list[RemoteMessage]
flag_changes: list[FlagChange]
expunged_uids: list[int]
new_uidvalidity: int | None # non-None => UIDVALIDITY changed, caller must full-resync
new_highestmodseq: int | None
class MailProvider(Protocol):
async def verify(self) -> None:
"""Raises ProviderAuthError / ProviderConnectError with a human-readable .detail."""
...
async def list_mailboxes(self) -> list[RemoteMailbox]: ...
def backfill(
self,
mailbox: str,
*,
newest_first: bool = True,
batch_size: int = 200,
since: date | None = None,
before: date | None = None,
) -> AsyncIterator[list[RemoteMessage]]:
"""Yields batches until the mailbox is exhausted. Headers+body in one pass.
``since``/``before`` bound the import by internal date (SPEC §12 M2)."""
...
async def message_count(self, mailbox: str, *, since: date | None = None) -> int:
"""Number of messages to import (progress denominator); whole mailbox or
the ``since`` window."""
...
async def newest_uid(self, mailbox: str) -> int:
"""Current high-water UID; used by the ``new`` window to skip history."""
...
async def poll(
self, mailbox: str, *, last_seen_uid: int, highestmodseq: int | None
) -> MailboxDelta:
"""One reconciliation pass. Uses QRESYNC/CONDSTORE when highestmodseq is not None,
otherwise UID SEARCH + FETCH FLAGS diff."""
...
async def list_uids(self, mailbox: str) -> set[int]:
"""Full set of UIDs currently present in the mailbox (expunge reconciliation)."""
...
async def idle(self, mailbox: str) -> None:
"""Blocks until the server signals change or 25 min elapse (re-issue IDLE). May raise
ProviderNotSupported => sync loop falls back to poll() every POLL_WARM (default 180 s).
"""
...
async def push_flags(
self, mailbox: str, uid: int, add: frozenset[str], remove: frozenset[str]
) -> None: ...
async def move(self, uid: int, src: str, dst: str) -> int: # returns new UID
...
async def delete_messages(self, mailbox: str, uids: list[int]) -> None:
"""Permanently delete messages: set \\Deleted then EXPUNGE (SPEC §6.3)."""
...
async def append(
self, mailbox: str, raw: bytes, flags: frozenset[str]
) -> int: # Sent/Drafts upload
...
async def send(
self, raw: bytes, envelope_from: str, envelope_to: list[str]
) -> None: # SMTP submission
...