Steven
f6e7616756
CI / backend (push) Canceled after 0s
上一版用 `manager.polling()` 判"有没有人在收消息"，那是进程内状态：请求落到持有者 回答 true、落到备用进程回答 false，页面上就会每两秒闪一次"已停止"。 改成查数据库里的 advisory lock（`pg_locks`，objsubid=2 的两段式锁），谁抢到租约所有 进程都看得见。`lease_held()` 自己开一条短会话查，不复用请求会话——接口里常在 `await session.commit()` 之后才拼返回值，那时原事务已经关了。
247 lines
8.8 KiB
Python
247 lines
8.8 KiB
Python
"""外部接入：微信 clawbot 的扫码登录与状态。
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真实协议是腾讯 iLink Bot（出处见 `app/services/wechat_ilink.py` 文件头）：
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**我们**去取二维码、等人扫、拿到登录态后长轮询拉消息。所以这里的接口是三件事：
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1. `POST /workspaces/{ws}/integrations/wechat/qr` —— 取一张二维码，页面显示给人扫；
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2. `GET /workspaces/{ws}/integrations/wechat/qr/{id}` —— 问"扫了吗"，扫成功就存登录态并开始轮询；
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3. `DELETE /workspaces/{ws}/integrations/{channel_id}` —— 断开：登录态作废、轮询停止。
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二维码 id 放 Redis 而不是内存：问状态的那一下可能落到另一个进程，
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存内存就会"扫完了但没人知道"。key 带工作区，两个工作区互不踩。
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上一版这里做的是 webhook 接收端（`POST /integrations/clawbot/{token}`），
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对 clawbot 的理解是错的，接口与令牌一并删掉了（迁移 0013 的注释记了原因）。
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"""
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from __future__ import annotations
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import base64
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import io
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import uuid
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from typing import Any
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import qrcode
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import qrcode.image.svg
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from fastapi import APIRouter, Query
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from pydantic import BaseModel
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from sqlalchemy import select
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from ..db import bind_tenant
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from ..deps import AdminDep, SessionDep
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from ..errors import AppError, ErrorCode
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from ..models_integrations import BotChannel, BotMessage
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from ..schemas import ok
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from ..services import wechat_ilink
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from ..services.wechat_bot import lease_held, manager
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from ..stores import get_store
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admin_router = APIRouter(prefix="/workspaces", tags=["外部接入"])
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# iLink 的二维码大约 3 分钟过期，我们按 5 分钟缓存 id，过期就重新取。
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QR_TTL_SECONDS = 300
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class ChannelPatch(BaseModel):
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status: str
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def _qr_key(ws_id: uuid.UUID) -> str:
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return f"wechat:qr:{ws_id}"
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def render_qr_svg(payload: str) -> str:
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"""把二维码内容画成 data URL：服务端画，前端不用再引一个二维码库。"""
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image = qrcode.make(payload, image_factory=qrcode.image.svg.SvgPathImage, box_size=10)
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buffer = io.BytesIO()
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image.save(buffer)
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encoded = base64.b64encode(buffer.getvalue()).decode("ascii")
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return f"data:image/svg+xml;base64,{encoded}"
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async def _channel_out(channel: BotChannel) -> dict[str, Any]:
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return {
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"id": str(channel.id),
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"kind": channel.kind,
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"name": channel.name,
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"status": channel.status,
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"connected": bool(channel.bot_token_enc) and channel.status == "active",
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# 数据库级租约：谁在真收消息所有进程都认，页面不会跟着进程抖动。
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"polling": await lease_held(channel.id),
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"ilink_user_id": channel.ilink_user_id,
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"last_seen_at": channel.last_seen_at,
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"last_error": channel.last_error,
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"created_at": channel.created_at,
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}
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async def _wechat_channel(session: SessionDep, ws_id: uuid.UUID) -> BotChannel | None:
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rows = await session.execute(
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select(BotChannel)
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.where(BotChannel.workspace_id == ws_id, BotChannel.kind == "wechat_clawbot")
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.order_by(BotChannel.created_at.desc())
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)
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return rows.scalars().first()
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@admin_router.get("/{ws_id}/integrations")
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async def list_integrations(ws_id: uuid.UUID, ctx: AdminDep, session: SessionDep):
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rows = await session.execute(
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select(BotChannel)
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.where(BotChannel.workspace_id == ws_id)
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.order_by(BotChannel.created_at.desc())
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)
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return ok({"items": [await _channel_out(c) for c in rows.scalars().all()]})
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@admin_router.post("/{ws_id}/integrations/wechat/qr")
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async def begin_wechat_login(ws_id: uuid.UUID, ctx: AdminDep, session: SessionDep):
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"""取一张二维码。已经登录过的通道会被重置成 pending（换号 = 重新扫）。"""
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try:
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code = await wechat_ilink.get_qrcode()
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except wechat_ilink.WechatError as exc:
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raise AppError(ErrorCode.BOT_TOKEN_INVALID, f"取二维码失败：{exc}") from exc
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channel = await _wechat_channel(session, ws_id)
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if channel is None:
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channel = BotChannel(
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workspace_id=ws_id,
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kind="wechat_clawbot",
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name="微信",
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status="pending",
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created_by=ctx.user.id,
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)
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session.add(channel)
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if channel.bot_token_enc:
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await manager.stop(channel.id)
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channel.bot_token_enc = None
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channel.sync_buf = None
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channel.context_token = None
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channel.status = "pending"
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channel.last_error = None
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await session.flush()
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await get_store().set(_qr_key(ws_id), code.qrcode_id, QR_TTL_SECONDS)
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await session.commit()
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return ok(
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{
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"channel_id": str(channel.id),
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"qrcode_id": code.qrcode_id,
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"payload": code.payload,
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"image": render_qr_svg(code.payload),
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"expires_in": QR_TTL_SECONDS,
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}
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)
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@admin_router.get("/{ws_id}/integrations/wechat/qr/{qrcode_id}")
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async def poll_wechat_login(ws_id: uuid.UUID, qrcode_id: str, ctx: AdminDep, session: SessionDep):
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"""问扫码结果。只有 confirmed 才落登录态并开轮询，其余状态原样回给页面。"""
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cached = await get_store().get(_qr_key(ws_id))
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if cached != qrcode_id:
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# 页面拿着旧二维码在问：直接说"过期"，让它重新取一张。
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return ok({"status": "expired"})
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try:
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status = await wechat_ilink.qrcode_status(qrcode_id)
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except wechat_ilink.WechatError as exc:
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return ok({"status": "error", "message": str(exc)})
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if status.status != "confirmed" or not status.bot_token:
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return ok({"status": status.status})
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channel = await _wechat_channel(session, ws_id)
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if channel is None:
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raise AppError(ErrorCode.BOT_TOKEN_INVALID, "通道不见了，请重新取二维码")
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await bind_tenant(session, ws_id, ctx.user.id)
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channel.bot_token_enc = wechat_ilink.encrypt_token(status.bot_token)
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channel.ilink_user_id = status.ilink_user_id
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channel.base_url = status.base_url
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channel.status = "active"
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channel.sync_buf = None
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channel.context_token = None
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channel.last_error = None
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channel.created_by = channel.created_by or ctx.user.id
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await session.commit()
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await get_store().delete(_qr_key(ws_id))
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await manager.start(channel.id)
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return ok({"status": "confirmed", "channel": await _channel_out(channel)})
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@admin_router.patch("/{ws_id}/integrations/{channel_id}")
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async def update_integration(
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ws_id: uuid.UUID,
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channel_id: uuid.UUID,
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ctx: AdminDep,
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session: SessionDep,
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body: ChannelPatch,
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):
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channel = await session.get(BotChannel, channel_id)
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if channel is None or channel.workspace_id != ws_id:
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raise AppError(ErrorCode.BOT_TOKEN_INVALID, "接入通道不存在")
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wanted = body.status.strip()
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if wanted not in ("active", "disabled"):
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raise AppError(ErrorCode.VALIDATION_FAILED, "status 只能是 active 或 disabled")
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if wanted == "active" and not channel.bot_token_enc:
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raise AppError(ErrorCode.BOT_TOKEN_INVALID, "这个通道还没扫码登录")
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channel.status = wanted
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await session.commit()
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if wanted == "active":
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await manager.start(channel.id)
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else:
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await manager.stop(channel.id)
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return ok({"channel": await _channel_out(channel)})
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@admin_router.delete("/{ws_id}/integrations/{channel_id}")
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async def disconnect_integration(
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ws_id: uuid.UUID, channel_id: uuid.UUID, ctx: AdminDep, session: SessionDep
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):
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"""断开：停轮询、清登录态。留痕（bot_message）不删，翻旧账用得上。"""
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channel = await session.get(BotChannel, channel_id)
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if channel is None or channel.workspace_id != ws_id:
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raise AppError(ErrorCode.BOT_TOKEN_INVALID, "接入通道不存在")
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await manager.stop(channel.id)
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channel.bot_token_enc = None
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channel.sync_buf = None
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channel.context_token = None
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channel.status = "pending"
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channel.last_error = None
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await session.commit()
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return ok({"channel": await _channel_out(channel)})
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@admin_router.get("/{ws_id}/integrations/{channel_id}/messages")
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async def list_messages(
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ws_id: uuid.UUID,
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channel_id: uuid.UUID,
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ctx: AdminDep,
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session: SessionDep,
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limit: int = Query(default=5, ge=1, le=100),
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):
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rows = await session.execute(
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select(BotMessage)
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.where(BotMessage.channel_id == channel_id, BotMessage.workspace_id == ws_id)
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.order_by(BotMessage.created_at.desc())
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.limit(limit)
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)
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return ok(
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{
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"items": [
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{
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"id": str(m.id),
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"action": m.action,
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"sender": m.sender,
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"text": m.text,
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"reply": m.reply,
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"item_id": str(m.item_id) if m.item_id else None,
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"created_at": m.created_at,
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}
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for m in rows.scalars().all()
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]
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}
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)
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