医药行业差旅管理系统搭建：学术会议差旅管理 + 合规追溯功能实现方案

// 差旅审批流程控制示例
public class TravelApprovalProcess
{
    public ApprovalResult SubmitApproval(TravelRequest request)
    {
        // 根据差旅类型和金额确定审批流程
        var approvalFlow = DetermineApprovalFlow(request);
        
        // 执行多级审批流程
        foreach (var approver in approvalFlow.Approvers)
        {
            var result = approver.Review(request);
            if (result.Status != ApprovalStatus.Approved)
                return result;
        }
        
        return ApprovalResult.Approved();
    }
    
    private ApprovalFlow DetermineApprovalFlow(TravelRequest request)
    {
        // 实现审批流程逻辑
        // 根据会议级别、费用金额等因素确定审批路径
    }
}

// 合规检查规则引擎示例
class ComplianceEngine {
  constructor(rules) {
    this.rules = rules;
  }

  // 执行合规检查
  async checkCompliance(travelData) {
    const violations = [];
    
    for (const rule of this.rules) {
      const result = await rule.execute(travelData);
      if (!result.passed) {
        violations.push({
          rule: rule.name,
          message: result.message,
          severity: rule.severity
        });
      }
    }
    
    return {
      passed: violations.length === 0,
      violations: violations
    };
  }

  // 添加新规则
  addRule(rule) {
    this.rules.push(rule);
  }
}

// 示例规则：会议费用限制检查
const conferenceExpenseRule = {
  name: '会议费用限制',
  severity: 'high',
  async execute(travelData) {
    const maxAllowable = await getConferenceMaxAllowable(travelData.conferenceType);
    return {
      passed: travelData.totalExpense <= maxAllowable,
      message: `会议费用超出限额: ${travelData.totalExpense} > ${maxAllowable}`
    };
  }
};