1import { createHash } from 'crypto'
2import { compact, isArray } from 'lodash-es'
3import { assertIncludes } from '../sharedF/assertsF/assertIncludesF.mts'
4import { assertNonEmptyString } from '../sharedF/assertsF/assertNonEmptyStringAI.mts'
5import { throwIf } from '../sharedF/throwErrorF/throwIfF.mts'
6
7type HashAlgorithm = 'sha1' | 'sha256'
8const hashAlgorithms = ['sha1', 'sha256'] as const
9
10export const calcReqHash = (str: string | string[], alg?: HashAlgorithm): string => {
11  if (isArray(str)) {
12    const arr = str
13    const arrLen = arr.length
14    const arrCompactLen = compact(arr).length
15    throwIf(() => arrLen != arrCompactLen, {arr, arrLen, arrCompactLen})
16    str = str.join('')
17  }
18  assertNonEmptyString(str, {str})
19  return calcHash(str, alg)
20}
21
22export const calcHash = (str: string, alg: HashAlgorithm = 'sha1'): string => {
23  assertIncludes(hashAlgorithms, alg, {alg})
24  const shasum = createHash(alg)
25  shasum.update(str)
26  return shasum.digest('hex')
27}
28