refactor(server): split oversized backend services
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caoxiaozhu
177
server/src/app/services/expense_claim_risk_review.py
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177
server/src/app/services/expense_claim_risk_review.py
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from __future__ import annotations
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from datetime import UTC, datetime, timedelta
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from typing import Any
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from sqlalchemy import or_, select
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from app.models.financial_record import ExpenseClaim
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from app.services.expense_claim_constants import (
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AI_REVIEW_LOOKBACK_DAYS,
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AI_REVIEW_REPEAT_RISK_BLOCK_COUNT,
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AI_REVIEW_REPEAT_RISK_WARNING_COUNT,
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)
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from app.services.expense_claim_item_sync import ExpenseClaimItemSyncMixin
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from app.services.expense_claim_platform_risk import ExpenseClaimPlatformRiskMixin
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from app.services.expense_claim_policy_review import ExpenseClaimPolicyReviewMixin
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class ExpenseClaimRiskReviewMixin(
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ExpenseClaimPlatformRiskMixin,
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ExpenseClaimPolicyReviewMixin,
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ExpenseClaimItemSyncMixin,
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):
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def _run_ai_submission_review(self, claim: ExpenseClaim) -> dict[str, Any]:
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base_flags = list(claim.risk_flags_json or [])
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attachment_flags = [
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flag
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for flag in base_flags
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if isinstance(flag, dict) and str(flag.get("source") or "").strip() == "attachment_analysis"
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]
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preserved_flags = [
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flag
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for flag in base_flags
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if not (isinstance(flag, dict) and str(flag.get("source") or "").strip() == "submission_review")
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]
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review_flags: list[dict[str, Any]] = []
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attention_reasons: list[str] = []
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high_attachment_flags = [
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flag
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for flag in attachment_flags
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if str(flag.get("severity") or "").strip().lower() == "high"
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]
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medium_attachment_flags = [
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flag
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for flag in attachment_flags
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if str(flag.get("severity") or "").strip().lower() == "medium"
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]
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if high_attachment_flags:
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attention_reasons.append("存在高风险票据，需审批人重点复核。")
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review_flags.append(
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{
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"source": "submission_review",
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"severity": "high",
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"label": "AI预审重点复核",
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"message": (
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f"AI预审发现 {len(high_attachment_flags)} 条高风险附件，"
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"已随单流转给审批人重点复核。"
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),
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}
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)
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elif medium_attachment_flags:
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review_flags.append(
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{
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"source": "submission_review",
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"severity": "medium",
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"label": "AI预审提醒",
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"message": f"AI预审发现 {len(medium_attachment_flags)} 条中风险附件，已随单流转给审批人复核。",
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}
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)
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manager_name = self._resolve_claim_manager_name(claim)
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if not manager_name:
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attention_reasons.append("未识别到该员工的直属领导，需审批环节补充分配。")
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review_flags.append(
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{
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"source": "submission_review",
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"severity": "medium",
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"label": "审批链待分配",
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"message": "AI预审发现直属领导缺失，已提交到审批环节等待分配或复核。",
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}
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)
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historical_risk_count = self._count_recent_risky_claims(claim)
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if historical_risk_count >= AI_REVIEW_REPEAT_RISK_BLOCK_COUNT:
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review_flags.append(
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{
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"source": "submission_review",
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"severity": "medium",
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"label": "历史风险偏高",
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"message": (
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f"近 {AI_REVIEW_LOOKBACK_DAYS} 天内该员工已有 {historical_risk_count} 笔带风险标记的报销，"
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"本次已追加到审批链重点关注。"
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),
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}
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)
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elif historical_risk_count >= AI_REVIEW_REPEAT_RISK_WARNING_COUNT:
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review_flags.append(
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{
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"source": "submission_review",
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"severity": "low",
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"label": "历史风险提醒",
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"message": (
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f"近 {AI_REVIEW_LOOKBACK_DAYS} 天内该员工已有 {historical_risk_count} 笔带风险标记的报销，"
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"建议直属领导重点复核。"
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),
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}
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)
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travel_review = self._run_travel_policy_review(claim)
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attention_reasons.extend(travel_review["blocking_reasons"])
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review_flags.extend(travel_review["flags"])
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scene_policy_review = self._run_scene_policy_review(claim)
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attention_reasons.extend(scene_policy_review["blocking_reasons"])
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review_flags.extend(scene_policy_review["flags"])
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platform_risk_review = self.evaluate_platform_risk_rules(claim)
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attention_reasons.extend(platform_risk_review["blocking_reasons"])
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review_flags.extend(platform_risk_review["flags"])
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if attention_reasons:
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summary_message = "AI预审发现需审批重点关注事项：" + "；".join(
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dict.fromkeys(attention_reasons)
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)
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review_flags.insert(
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0,
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{
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"source": "submission_review",
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"severity": "medium",
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"label": "AI预审重点复核",
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"message": summary_message,
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},
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)
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return {
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"status": "submitted",
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"approval_stage": "直属领导审批",
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"risk_flags": preserved_flags + review_flags,
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"message": (
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f"报销单 {claim.claim_no} 已完成 AI预审，"
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f"现已提交给直属领导 {manager_name or '审批人'} 审批。"
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),
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"passed": True,
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}
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@staticmethod
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def _resolve_claim_manager_name(claim: ExpenseClaim) -> str:
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if claim.employee is not None:
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if claim.employee.manager is not None and claim.employee.manager.name:
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return str(claim.employee.manager.name).strip()
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if claim.employee.organization_unit is not None and claim.employee.organization_unit.manager_name:
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return str(claim.employee.organization_unit.manager_name).strip()
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return ""
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def _count_recent_risky_claims(self, claim: ExpenseClaim) -> int:
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filters = []
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if claim.employee_id:
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filters.append(ExpenseClaim.employee_id == claim.employee_id)
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elif claim.employee_name:
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filters.append(ExpenseClaim.employee_name == claim.employee_name)
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if not filters:
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return 0
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since = datetime.now(UTC) - timedelta(days=AI_REVIEW_LOOKBACK_DAYS)
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stmt = (
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select(ExpenseClaim)
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.where(or_(*filters))
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.where(ExpenseClaim.id != claim.id)
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.where(ExpenseClaim.occurred_at >= since)
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)
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recent_claims = list(self.db.scalars(stmt).all())
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return sum(1 for item in recent_claims if list(item.risk_flags_json or []))
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