feat(iit-manager): Add WeChat Official Account integration for patient notifications
Features: - PatientWechatCallbackController for URL verification and message handling - PatientWechatService for template and customer messages - Support for secure mode (message encryption/decryption) - Simplified route /wechat/patient/callback for WeChat config - Event handlers for subscribe/unsubscribe/text messages - Template message for visit reminders Technical details: - Reuse @wecom/crypto for encryption (compatible with Official Account) - Relaxed Fastify schema validation to prevent early request blocking - Access token caching (7000s with 5min pre-refresh) - Comprehensive logging for debugging Testing: Local URL verification passed, ready for SAE deployment Status: Code complete, waiting for WeChat platform configuration
This commit is contained in:
484
backend/src/modules/iit-manager/services/PatientWechatService.ts
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484
backend/src/modules/iit-manager/services/PatientWechatService.ts
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/**
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* 微信服务号消息推送服务（患者端）
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*
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* 功能：
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* 1. 获取微信服务号 Access Token（缓存管理）
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* 2. 发送模板消息（访视提醒、填表通知等）
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* 3. 发送客服消息（文本、图片、图文）
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* 4. 管理用户订阅（订阅消息）
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*
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* 技术要点：
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* - Access Token 缓存（7000秒，提前5分钟刷新）
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* - 错误重试机制
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* - 完整的日志记录
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*
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* 参考文档：
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* - https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Template_Message_Interface.html
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* - https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Service_Center_messages.html
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*/
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import axios from 'axios';
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import { PrismaClient } from '@prisma/client';
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import { logger } from '../../../common/logging/index.js';
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const prisma = new PrismaClient();
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// ==================== 类型定义 ====================
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interface WechatMpConfig {
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appId: string;
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appSecret: string;
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}
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interface AccessTokenCache {
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token: string;
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expiresAt: number;
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}
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interface WechatApiResponse {
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errcode: number;
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errmsg: string;
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}
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interface AccessTokenResponse extends WechatApiResponse {
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access_token?: string;
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expires_in?: number;
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}
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interface SendMessageResponse extends WechatApiResponse {
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msgid?: number;
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}
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interface TemplateMessageData {
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[key: string]: {
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value: string;
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color?: string;
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};
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}
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interface TemplateMessageParams {
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touser: string; // 接收者openid
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template_id: string; // 模板ID
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url?: string; // 跳转URL（H5）
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miniprogram?: { // 跳转小程序
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appid: string;
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pagepath: string;
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};
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data: TemplateMessageData; // 模板数据
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topcolor?: string; // 顶部颜色
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}
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interface CustomerMessageParams {
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touser: string; // 接收者openid
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msgtype: string; // 消息类型（text, image, news等）
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text?: { // 文本消息
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content: string;
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};
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image?: { // 图片消息
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media_id: string;
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};
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news?: { // 图文消息
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articles: Array<{
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title: string;
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description: string;
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url: string;
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picurl: string;
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}>;
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};
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}
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// ==================== 微信服务号服务类 ====================
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export class PatientWechatService {
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private config: WechatMpConfig;
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private accessTokenCache: AccessTokenCache | null = null;
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private readonly baseUrl = 'https://api.weixin.qq.com/cgi-bin';
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constructor() {
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// 从环境变量读取配置
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this.config = {
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appId: process.env.WECHAT_MP_APP_ID || '',
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appSecret: process.env.WECHAT_MP_APP_SECRET || '',
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};
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// 验证配置
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if (!this.config.appId || !this.config.appSecret) {
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logger.error('❌ 微信服务号配置不完整', {
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hasAppId: !!this.config.appId,
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hasAppSecret: !!this.config.appSecret,
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});
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throw new Error('微信服务号配置不完整，请检查环境变量');
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}
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logger.info('✅ 微信服务号服务初始化成功', {
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appId: this.config.appId,
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});
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}
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// ==================== Access Token 管理 ====================
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/**
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* 获取微信服务号 Access Token
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* - 优先返回缓存的 Token（如果未过期）
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* - 过期或不存在时，重新请求
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*/
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async getAccessToken(): Promise<string> {
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try {
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// 1. 检查缓存
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if (this.accessTokenCache) {
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const now = Date.now();
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const expiresIn = this.accessTokenCache.expiresAt - now;
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// 提前5分钟刷新（避免临界点失效）
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if (expiresIn > 5 * 60 * 1000) {
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logger.debug('✅ 使用缓存的 Access Token', {
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expiresIn: Math.floor(expiresIn / 1000) + 's',
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});
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return this.accessTokenCache.token;
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}
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logger.info('⏰ Access Token 即将过期，重新获取');
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}
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// 2. 请求新的 Access Token
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const url = `${this.baseUrl}/token`;
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const response = await axios.get<AccessTokenResponse>(url, {
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params: {
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grant_type: 'client_credential',
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appid: this.config.appId,
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secret: this.config.appSecret,
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},
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timeout: 10000,
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});
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// 3. 检查响应
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if (response.data.errcode && response.data.errcode !== 0) {
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throw new Error(
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`获取 Access Token 失败：${response.data.errmsg} (errcode: ${response.data.errcode})`
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);
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}
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if (!response.data.access_token) {
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throw new Error('Access Token 响应中缺少 access_token 字段');
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}
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// 4. 缓存 Token
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const expiresIn = response.data.expires_in || 7200; // 默认2小时
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this.accessTokenCache = {
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token: response.data.access_token,
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expiresAt: Date.now() + expiresIn * 1000,
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};
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logger.info('✅ 获取 Access Token 成功', {
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tokenLength: this.accessTokenCache.token.length,
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expiresIn: expiresIn + 's',
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});
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return this.accessTokenCache.token;
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} catch (error: any) {
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logger.error('❌ 获取 Access Token 失败', {
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error: error.message,
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response: error.response?.data,
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});
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throw error;
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}
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}
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// ==================== 模板消息推送 ====================
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/**
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* 发送模板消息
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*
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* 使用场景：
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* - 访视提醒
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* - 填表通知
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* - 结果反馈
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*
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* 注意：模板需要在微信公众平台申请并通过审核
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*/
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async sendTemplateMessage(params: TemplateMessageParams): Promise<void> {
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try {
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logger.info('📤 准备发送模板消息', {
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touser: params.touser,
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template_id: params.template_id,
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hasUrl: !!params.url,
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hasMiniProgram: !!params.miniprogram,
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});
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// 1. 获取 Access Token
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const accessToken = await this.getAccessToken();
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// 2. 调用发送接口
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const url = `${this.baseUrl}/message/template/send?access_token=${accessToken}`;
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const response = await axios.post<SendMessageResponse>(url, params, {
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timeout: 10000,
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});
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// 3. 检查响应
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if (response.data.errcode !== 0) {
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throw new Error(
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`发送模板消息失败：${response.data.errmsg} (errcode: ${response.data.errcode})`
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);
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}
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logger.info('✅ 模板消息发送成功', {
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touser: params.touser,
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msgid: response.data.msgid,
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});
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// 4. 记录到数据库
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await this.logNotification(params.touser, 'template', params.template_id, params, 'sent');
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} catch (error: any) {
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logger.error('❌ 发送模板消息失败', {
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error: error.message,
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touser: params.touser,
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response: error.response?.data,
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});
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// 记录失败日志
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await this.logNotification(
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params.touser,
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'template',
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params.template_id,
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params,
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'failed',
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error.message
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);
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throw error;
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}
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}
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/**
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* 发送访视提醒（模板消息）
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*
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* 示例模板格式：
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* {{first.DATA}}
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* 访视时间：{{keyword1.DATA}}
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* 访视地点：{{keyword2.DATA}}
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* 注意事项：{{keyword3.DATA}}
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* {{remark.DATA}}
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*/
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async sendVisitReminder(params: {
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openid: string;
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templateId: string;
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visitTime: string;
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visitLocation: string;
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notes: string;
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miniProgramPath?: string;
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}): Promise<void> {
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const messageParams: TemplateMessageParams = {
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touser: params.openid,
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template_id: params.templateId,
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data: {
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first: {
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value: '您有一次访视安排',
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color: '#173177',
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},
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keyword1: {
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value: params.visitTime,
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color: '#173177',
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},
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keyword2: {
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value: params.visitLocation,
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color: '#173177',
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},
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keyword3: {
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value: params.notes,
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color: '#173177',
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},
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remark: {
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value: '请按时到院，如有问题请联系研究团队',
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color: '#173177',
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},
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},
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};
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// 如果提供了小程序路径，跳转到小程序
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if (params.miniProgramPath) {
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messageParams.miniprogram = {
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appid: process.env.WECHAT_MINI_APP_ID || '',
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pagepath: params.miniProgramPath,
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};
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}
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await this.sendTemplateMessage(messageParams);
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}
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// ==================== 客服消息推送 ====================
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/**
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* 发送客服消息（文本）
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*
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* 限制：
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* - 只能在用户48小时内与公众号有交互后发送
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* - 或者用户主动发送消息后48小时内
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*/
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async sendCustomerMessage(params: CustomerMessageParams): Promise<void> {
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try {
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logger.info('📤 准备发送客服消息', {
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touser: params.touser,
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msgtype: params.msgtype,
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});
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// 1. 获取 Access Token
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const accessToken = await this.getAccessToken();
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// 2. 调用发送接口
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const url = `${this.baseUrl}/message/custom/send?access_token=${accessToken}`;
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const response = await axios.post<WechatApiResponse>(url, params, {
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timeout: 10000,
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});
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// 3. 检查响应
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if (response.data.errcode !== 0) {
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throw new Error(
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`发送客服消息失败：${response.data.errmsg} (errcode: ${response.data.errcode})`
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);
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}
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logger.info('✅ 客服消息发送成功', {
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touser: params.touser,
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});
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// 4. 记录到数据库
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await this.logNotification(params.touser, 'customer', params.msgtype, params, 'sent');
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} catch (error: any) {
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logger.error('❌ 发送客服消息失败', {
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error: error.message,
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touser: params.touser,
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response: error.response?.data,
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});
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// 记录失败日志
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await this.logNotification(
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params.touser,
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'customer',
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params.msgtype,
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params,
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'failed',
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error.message
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);
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throw error;
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}
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}
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/**
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* 发送文本客服消息（快捷方法）
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*/
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async sendTextMessage(openid: string, content: string): Promise<void> {
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await this.sendCustomerMessage({
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touser: openid,
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msgtype: 'text',
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text: {
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content,
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},
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});
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}
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// ==================== 辅助方法 ====================
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/**
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* 记录消息推送日志到数据库
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*/
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private async logNotification(
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openid: string,
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notificationType: string,
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templateId: string,
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content: any,
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status: 'sent' | 'failed',
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errorMessage?: string
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): Promise<void> {
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try {
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// TODO: 实现数据库记录
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// 需要先创建 patient_notifications 表
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logger.info('📝 记录消息推送日志', {
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openid,
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notificationType,
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templateId,
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status,
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hasError: !!errorMessage,
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});
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// 临时实现：记录到日志
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// 正式实现：存储到 iit_schema.patient_notifications 表
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} catch (error: any) {
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logger.error('❌ 记录消息推送日志失败', {
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error: error.message,
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openid,
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});
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}
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}
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// ==================== 用户管理 ====================
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/**
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* 检查用户是否已关注公众号
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*/
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async isUserSubscribed(openid: string): Promise<boolean> {
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try {
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const accessToken = await this.getAccessToken();
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const url = `${this.baseUrl}/user/info?access_token=${accessToken}&openid=${openid}`;
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const response = await axios.get(url, { timeout: 10000 });
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if (response.data.errcode && response.data.errcode !== 0) {
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logger.error('❌ 查询用户信息失败', {
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errcode: response.data.errcode,
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errmsg: response.data.errmsg,
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});
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return false;
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}
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const isSubscribed = response.data.subscribe === 1;
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logger.info('✅ 查询用户订阅状态', {
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openid,
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isSubscribed,
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});
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return isSubscribed;
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} catch (error: any) {
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logger.error('❌ 查询用户订阅状态失败', {
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error: error.message,
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openid,
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});
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return false;
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}
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}
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/**
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* 获取用户基本信息
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*/
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async getUserInfo(openid: string): Promise<any> {
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try {
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const accessToken = await this.getAccessToken();
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const url = `${this.baseUrl}/user/info?access_token=${accessToken}&openid=${openid}`;
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const response = await axios.get(url, { timeout: 10000 });
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if (response.data.errcode && response.data.errcode !== 0) {
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throw new Error(`获取用户信息失败：${response.data.errmsg}`);
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}
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logger.info('✅ 获取用户信息成功', {
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openid,
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nickname: response.data.nickname,
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subscribe: response.data.subscribe,
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});
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return response.data;
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} catch (error: any) {
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logger.error('❌ 获取用户信息失败', {
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error: error.message,
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openid,
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});
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throw error;
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}
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}
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}
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// 导出单例
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export const patientWechatService = new PatientWechatService();
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Reference in New Issue
Block a user