snippets.browser.ts47 lines · main

1	import { IS_PLATFORM } from 'common'
2	import { compact } from 'lodash'
3	import { v4 as uuidv4 } from 'uuid'
4
5	/**
6	* Generates a UUID v4. If the platform is self-hosted, it will generate a deterministic UUID v4 from the inputs.
7	*/
8	export const generateUuid = (inputs: (string | undefined | null)[] = []) => {
9	const cleaned = compact(inputs)
10	if (!IS_PLATFORM && cleaned.length === 0) return uuidv4()
11	return IS_PLATFORM ? uuidv4() : generateDeterministicUuid(cleaned)
12	}
13
14	/**
15	* Generates a deterministic UUID v4 from a string input
16	* @param inputs - The array of strings to generate a UUID from
17	* @returns A deterministic UUID v4 string
18	*/
19	export function generateDeterministicUuid(inputs: (string | undefined | null)[]): string {
20	const simpleHash = (str: string): number => {
21	let hash = 0
22	if (str.length === 0) return hash
23	for (let i = 0; i < str.length; i++) {
24	const char = str.charCodeAt(i)
25	hash = (hash << 5) - hash + char
26	hash = hash & hash // Convert to 32-bit integer
27	}
28	return Math.abs(hash)
29	}
30
31	const input = compact(inputs).join('_')
32
33	// Create a deterministic random number generator using the hash as seed
34	let seed = simpleHash(input)
35	const rng = () => {
36	const bytes = new Uint8Array(16)
37	for (let i = 0; i < 16; i++) {
38	// Simple LCG (Linear Congruential Generator) for deterministic randomness
39	seed = (seed * 1103515245 + 12345) & 0x7fffffff
40	bytes[i] = (seed >>> 16) & 0xff
41	}
42	return bytes
43	}
44
45	// Generate UUID v4 using the deterministic RNG
46	return uuidv4({ rng })
47	}