124 lines
2.9 KiB
JavaScript
124 lines
2.9 KiB
JavaScript
const { v4: uuidv4 } = require('uuid');
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const crypto = require('crypto');
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/**
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* 生成唯一会员码
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*/
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function generateMemberCode() {
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const timestamp = Date.now().toString(36);
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const random = Math.random().toString(36).substring(2, 8);
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return `M${timestamp}${random}`.toUpperCase();
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}
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/**
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* 生成比赛码
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*/
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function generateMatchCode() {
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const timestamp = Date.now().toString(36);
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const random = Math.random().toString(36).substring(2, 6);
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return `G${timestamp}${random}`.toUpperCase();
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}
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/**
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* 生成订单号
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*/
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function generateOrderNo() {
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const date = new Date();
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const dateStr = date.getFullYear().toString() +
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(date.getMonth() + 1).toString().padStart(2, '0') +
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date.getDate().toString().padStart(2, '0');
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const random = Math.random().toString().substring(2, 10);
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return `PO${dateStr}${random}`;
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}
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/**
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* 生成兑换码
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*/
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function generateExchangeCode() {
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return uuidv4().replace(/-/g, '').toUpperCase().substring(0, 16);
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}
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/**
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* 计算两点之间的距离（米）
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*/
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function calculateDistance(lat1, lon1, lat2, lon2) {
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const R = 6371000; // 地球半径（米）
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const dLat = toRad(lat2 - lat1);
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const dLon = toRad(lon2 - lon1);
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const a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
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Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) *
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Math.sin(dLon / 2) * Math.sin(dLon / 2);
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const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
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return R * c;
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}
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function toRad(value) {
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return value * Math.PI / 180;
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}
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/**
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* 分页参数处理
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*/
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function getPagination(page = 1, pageSize = 10) {
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const limit = Math.min(parseInt(pageSize) || 10, 100);
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const offset = (Math.max(parseInt(page) || 1, 1) - 1) * limit;
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return { limit, offset };
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}
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/**
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* 统一响应格式
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*/
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function success(data = null, message = '操作成功') {
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return { code: 0, message, data };
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}
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function error(message = '操作失败', code = 500) {
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return { code, message };
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}
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function pageResult(list, total, page, pageSize) {
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return {
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code: 0,
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data: {
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list,
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pagination: {
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total,
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page: parseInt(page),
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pageSize: parseInt(pageSize),
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totalPages: Math.ceil(total / pageSize)
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}
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}
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};
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}
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/**
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* 获取完整URL（处理头像等资源路径）
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* @param {string} path - 相对路径或完整URL
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* @param {object} req - Express request对象（用于获取host）
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* @returns {string} 完整URL
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*/
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function getFullUrl(path, req) {
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if (!path) return '';
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// 已经是完整URL，直接返回
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if (path.startsWith('http://') || path.startsWith('https://')) {
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return path;
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}
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// 相对路径，拼接服务器地址
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const protocol = req?.protocol || 'http';
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const host = req?.get('host') || `localhost:${process.env.PORT || 3000}`;
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return `${protocol}://${host}${path}`;
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}
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module.exports = {
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generateMemberCode,
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generateMatchCode,
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generateOrderNo,
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generateExchangeCode,
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calculateDistance,
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getPagination,
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success,
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error,
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pageResult,
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getFullUrl
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};
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