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backend/app/api/pipelines/list_dialogs.py

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+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, Query, Request
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.database.session import get_session
+from app.models import User
+from app.schemas.pipeline_chat_sch import PipelineDialogListItemResponse
+from app.services.pipeline_dialog_service import PipelineDialogService
+from app.utils.business_logger import log_business_event
+from app.utils.token_manager import get_current_user
+
+
+router = APIRouter(tags=["Pipelines"])
+
+
+@router.get("/dialogs", response_model=list[PipelineDialogListItemResponse])
+async def list_pipeline_dialogs(
+    request: Request,
+    limit: int = Query(default=20, ge=1, le=200),
+    offset: int = Query(default=0, ge=0),
+    session: AsyncSession = Depends(get_session),
+    current_user: User = Depends(get_current_user),
+):
+    trace_id = getattr(request.state, "traceId", None)
+    dialog_service = PipelineDialogService(session)
+    dialogs = await dialog_service.list_dialogs(
+        user_id=current_user.id,
+        limit=limit,
+        offset=offset,
+    )
+    response = [
+        PipelineDialogListItemResponse(
+            dialog_id=dialog.id,
+            title=dialog.title,
+            last_status=dialog.last_status,
+            last_pipeline_id=dialog.last_pipeline_id,
+            last_message_preview=dialog.last_message_preview,
+            created_at=dialog.created_at,
+            updated_at=dialog.updated_at,
+        )
+        for dialog in dialogs
+    ]
+    log_business_event(
+        "pipeline_dialogs_listed",
+        trace_id=trace_id,
+        user_id=str(current_user.id),
+        limit=limit,
+        offset=offset,
+        result_count=len(response),
+    )
+    return response