first commit

backend/app/api/v1/transactions.py

@@ -0,0 +1,36 @@
+from uuid import UUID
+
+from fastapi import APIRouter, Depends, Query, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.database import get_db
+from app.repositories.transaction_repo import TransactionRepository
+from app.schemas.transaction import TransactionOut, TransactionListOut, FlowGraphOut
+from app.services.flow_service import build_flow_graph
+
+router = APIRouter()
+
+
+@router.get("/cases/{case_id}/transactions", response_model=TransactionListOut)
+async def list_transactions(
+    case_id: UUID,
+    filter_type: str | None = Query(None, description="all / unique / duplicate"),
+    db: AsyncSession = Depends(get_db),
+):
+    repo = TransactionRepository(db)
+    items, total = await repo.list_by_case(case_id, filter_type=filter_type)
+    return TransactionListOut(items=items, total=total)
+
+
+@router.get("/transactions/{tx_id}", response_model=TransactionOut)
+async def get_transaction(tx_id: UUID, db: AsyncSession = Depends(get_db)):
+    repo = TransactionRepository(db)
+    tx = await repo.get(tx_id)
+    if not tx:
+        raise HTTPException(404, "交易不存在")
+    return tx
+
+
+@router.get("/cases/{case_id}/flows", response_model=FlowGraphOut)
+async def get_fund_flows(case_id: UUID, db: AsyncSession = Depends(get_db)):
+    return await build_flow_graph(case_id, db)