c3eb7125cc
详细说明: - 基于文旅订单班框架复制创建food-order-demo项目 - 修改端口配置为4174避免冲突 - 更新LandingPage为青莳轻食主题（绿色健康风格） - 重新定义7个食品行业专业Agent： * 市场研究专家：轻食市场分析、客群画像 * 营养配方师：营养成分配比、低卡高蛋白设计 * 供应链管理专家：有机食材供应、溯源体系 * 品牌策划师：品牌定位、店铺空间布局 * 财务分析师：投资预算、ROI分析 * 运营管理专家：运营流程、品控标准 * 食品创业导师：中央协调、方案整合 - 创建专用启动脚本start.sh - 验证系统可正常运行在端口4174 - 实现代码复用率90%，符合预期目标 影响文件: web_frontend/food-order-demo/ 技术栈: React 18 + TypeScript + Tailwind CSS + Zustand
73 lines
2.8 KiB
JavaScript
73 lines
2.8 KiB
JavaScript
// This file replaces `index.js` in bundlers like webpack or Rollup,
|
|
// according to `browser` config in `package.json`.
|
|
|
|
let { urlAlphabet } = require('./url-alphabet/index.cjs')
|
|
|
|
let random = bytes => crypto.getRandomValues(new Uint8Array(bytes))
|
|
|
|
let customRandom = (alphabet, defaultSize, getRandom) => {
|
|
// First, a bitmask is necessary to generate the ID. The bitmask makes bytes
|
|
// values closer to the alphabet size. The bitmask calculates the closest
|
|
// `2^31 - 1` number, which exceeds the alphabet size.
|
|
// For example, the bitmask for the alphabet size 30 is 31 (00011111).
|
|
// `Math.clz32` is not used, because it is not available in browsers.
|
|
let mask = (2 << (Math.log(alphabet.length - 1) / Math.LN2)) - 1
|
|
// Though, the bitmask solution is not perfect since the bytes exceeding
|
|
// the alphabet size are refused. Therefore, to reliably generate the ID,
|
|
// the random bytes redundancy has to be satisfied.
|
|
|
|
// Note: every hardware random generator call is performance expensive,
|
|
// because the system call for entropy collection takes a lot of time.
|
|
// So, to avoid additional system calls, extra bytes are requested in advance.
|
|
|
|
// Next, a step determines how many random bytes to generate.
|
|
// The number of random bytes gets decided upon the ID size, mask,
|
|
// alphabet size, and magic number 1.6 (using 1.6 peaks at performance
|
|
// according to benchmarks).
|
|
|
|
// `-~f => Math.ceil(f)` if f is a float
|
|
// `-~i => i + 1` if i is an integer
|
|
let step = -~((1.6 * mask * defaultSize) / alphabet.length)
|
|
|
|
return (size = defaultSize) => {
|
|
let id = ''
|
|
while (true) {
|
|
let bytes = getRandom(step)
|
|
// A compact alternative for `for (var i = 0; i < step; i++)`.
|
|
let j = step | 0
|
|
while (j--) {
|
|
// Adding `|| ''` refuses a random byte that exceeds the alphabet size.
|
|
id += alphabet[bytes[j] & mask] || ''
|
|
if (id.length === size) return id
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
let customAlphabet = (alphabet, size = 21) =>
|
|
customRandom(alphabet, size, random)
|
|
|
|
let nanoid = (size = 21) =>
|
|
crypto.getRandomValues(new Uint8Array(size)).reduce((id, byte) => {
|
|
// It is incorrect to use bytes exceeding the alphabet size.
|
|
// The following mask reduces the random byte in the 0-255 value
|
|
// range to the 0-63 value range. Therefore, adding hacks, such
|
|
// as empty string fallback or magic numbers, is unneccessary because
|
|
// the bitmask trims bytes down to the alphabet size.
|
|
byte &= 63
|
|
if (byte < 36) {
|
|
// `0-9a-z`
|
|
id += byte.toString(36)
|
|
} else if (byte < 62) {
|
|
// `A-Z`
|
|
id += (byte - 26).toString(36).toUpperCase()
|
|
} else if (byte > 62) {
|
|
id += '-'
|
|
} else {
|
|
id += '_'
|
|
}
|
|
return id
|
|
}, '')
|
|
|
|
module.exports = { nanoid, customAlphabet, customRandom, urlAlphabet, random }
|