repos / starfx

create-key.ts

 1import { isObject } from "./util.js";
 2
 3// deno-lint-ignore no-explicit-any
 4const deepSortObject = (opts?: any) => {
 5  if (!isObject(opts)) return opts;
 6  return Object.keys(opts)
 7    .sort()
 8    .reduce<Record<string, unknown>>((res, key) => {
 9      res[`${key}`] = opts[key];
10      if (opts[key] && isObject(opts[key])) {
11        res[`${key}`] = deepSortObject(opts[key]);
12      }
13      return res;
14    }, {});
15};
16
17function padStart(hash: string, len: number) {
18  let hsh = hash;
19  while (hsh.length < len) {
20    hsh = `0${hsh}`;
21  }
22  return hsh;
23}
24
25// https://gist.github.com/iperelivskiy/4110988
26const tinySimpleHash = (s: string) => {
27  let h = 9;
28  for (let i = 0; i < s.length; ) {
29    h = Math.imul(h ^ s.charCodeAt(i++), 9 ** 9);
30  }
31  return h ^ (h >>> 9);
32};
33
34/**
35 * This function used to set `ctx.key`
36 */
37// deno-lint-ignore no-explicit-any
38export const createKey = (name: string, payload?: any) => {
39  const normJsonString =
40    typeof payload !== "undefined"
41      ? JSON.stringify(deepSortObject(payload))
42      : "";
43  const hash = normJsonString
44    ? padStart(tinySimpleHash(normJsonString).toString(16), 8)
45    : "";
46  return hash ? `${name}|${hash}` : name;
47};