82 lines
2.9 KiB
Python
82 lines
2.9 KiB
Python
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"""GET /api/messages — chat timeline list (WeChat + WhatsApp).
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Read-only query over the mirrored ``message`` table. Filters:
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* ``channel`` — ``wechat`` / ``whatsapp``.
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* ``owner_account_id`` — owning staff account (wxId / uid).
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* ``talker_id`` (1:1) OR ``room_id`` (group) — the conversation anchor. Both
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may be supplied (AND), but typically the frontend sends exactly one.
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* ``start`` / ``end`` — ms-epoch window compared against ``timestamp``
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(inclusive on both ends).
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Ordered by ``timestamp asc`` so the timeline renders oldest-first. The index
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``ix_message_channel_owner_talker_time`` covers the hot path
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``(channel, owner_account_id, talker_id, timestamp)``.
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"""
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from __future__ import annotations
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from typing import Annotated
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import sqlalchemy as sa
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from fastapi import APIRouter, Depends, Query
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.api.deps import get_session
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from app.api.schemas import MessageOut, Page
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from app.db.models import Message
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router = APIRouter(prefix="/api", tags=["messages"])
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SessionDep = Annotated[AsyncSession, Depends(get_session)]
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PageParam = Annotated[int, Query(ge=1)]
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PageSizeParam = Annotated[int, Query(ge=1, le=100)]
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@router.get("/messages")
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async def list_messages(
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session: SessionDep,
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page: PageParam = 1,
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page_size: PageSizeParam = 50,
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channel: Annotated[str | None, Query()] = None,
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owner_account_id: Annotated[str | None, Query()] = None,
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talker_id: Annotated[str | None, Query()] = None,
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room_id: Annotated[str | None, Query()] = None,
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start: Annotated[int | None, Query(ge=0)] = None,
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end: Annotated[int | None, Query(ge=0)] = None,
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) -> Page[MessageOut]:
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"""List messages for a timeline (ordered by ``timestamp asc``)."""
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conditions = []
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if channel is not None:
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conditions.append(Message.channel == channel)
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if owner_account_id is not None:
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conditions.append(Message.owner_account_id == owner_account_id)
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if talker_id is not None:
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conditions.append(Message.talker_id == talker_id)
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if room_id is not None:
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conditions.append(Message.room_id == room_id)
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if start is not None:
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conditions.append(Message.timestamp >= start)
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if end is not None:
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conditions.append(Message.timestamp <= end)
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total_stmt = sa.select(sa.func.count()).select_from(Message)
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if conditions:
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total_stmt = total_stmt.where(*conditions)
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total = (await session.execute(total_stmt)).scalar_one()
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list_stmt = sa.select(Message)
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if conditions:
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list_stmt = list_stmt.where(*conditions)
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list_stmt = (
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list_stmt.order_by(
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sa.nullslast(Message.timestamp.asc()),
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Message.msg_id.asc(),
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)
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.limit(page_size)
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.offset((page - 1) * page_size)
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)
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rows = (await session.execute(list_stmt)).scalars().all()
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items = [MessageOut.model_validate(row) for row in rows]
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return Page(items=items, total=total, page=page, page_size=page_size)
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