72 lines
2.0 KiB
TypeScript
72 lines
2.0 KiB
TypeScript
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import db from '../config/database';
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import { logger } from '../utils/logger';
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export interface CarbonLog {
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tenantId: string;
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productId: string;
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orderId?: string;
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category: 'SOURCING' | 'LOGISTICS' | 'PACKAGING';
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emissionsKg: number;
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}
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/**
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* [BIZ_TRADE_12] 绿色供应链评估与碳中和路径服务
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* @description 追踪商品全生命周期的碳足迹，提供低碳物流建议并生成 ESG 报告
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*/
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export class GreenSupplyChainService {
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private static readonly TABLE_NAME = 'cf_carbon_footprints';
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/**
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* 记录碳排放记录 (BIZ_TRADE_12)
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*/
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static async logEmissions(params: CarbonLog): Promise<void> {
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logger.info(`[ESG] Logging ${params.emissionsKg}kg CO2 for Product ${params.productId} (${params.category})`);
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await db(this.TABLE_NAME).insert({
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tenant_id: params.tenantId,
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product_id: params.productId,
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order_id: params.orderId,
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carbon_emissions_kg: params.emissionsKg,
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category: params.category,
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created_at: new Date(),
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updated_at: new Date()
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});
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}
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/**
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* 估算物流碳排放 (BIZ_TRADE_12)
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* @description 基于运输模式、重量与距离估算
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*/
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static estimateLogisticsCarbon(mode: string, weightKg: number, distanceKm: number): number {
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// 简单系数 (kg CO2 per ton-km)
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// 航空: 0.5, 海运: 0.01, 铁路: 0.02, 公路: 0.08
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let factor = 0.08;
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switch (mode) {
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case 'AIR': factor = 0.5; break;
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case 'SEA': factor = 0.01; break;
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case 'RAIL': factor = 0.02; break;
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}
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const tons = weightKg / 1000;
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return tons * distanceKm * factor;
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}
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/**
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* 生成租户 ESG 摘要报告
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*/
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static async getESGSummary(tenantId: string): Promise<any> {
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const stats = await db(this.TABLE_NAME)
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.where({ tenant_id: tenantId })
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.select('category')
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.sum('carbon_emissions_kg as total')
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.groupBy('category');
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return {
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tenantId,
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totalEmissions: stats.reduce((acc, curr) => acc + Number(curr.total), 0),
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breakdown: stats,
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reportDate: new Date().toISOString()
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};
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}
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}
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