feat(helper): add data utils (#43)

tools/helper/src/client/index.ts

@@ -1,2 +1,3 @@
 export * from './composables/index.js'
+export * from './utils/index.js'
 export * from '../shared/index.js'

tools/helper/src/client/utils/data.ts

@@ -0,0 +1,28 @@
+import type { DeflateOptions } from 'fflate'
+import { strFromU8, strToU8, unzlibSync, zlibSync } from 'fflate/browser'
+
+declare const __VUEPRESS_SSR__: boolean
+
+export const encodeData = (
+  data: string,
+  level: DeflateOptions['level'] = 6,
+): string => {
+  const buffer = strToU8(data)
+  // zlib headers can be found at https://stackoverflow.com/a/54915442
+  const zipped = zlibSync(buffer, { level })
+  const binary = strFromU8(zipped, true)
+
+  return __VUEPRESS_SSR__
+    ? Buffer.from(binary, 'binary').toString('base64')
+    : btoa(binary)
+}
+
+export const decodeData = (base64: string): string => {
+  console.log(base64)
+
+  const binary = __VUEPRESS_SSR__
+    ? Buffer.from(base64, 'base64').toString('binary')
+    : atob(base64)
+
+  return strFromU8(unzlibSync(strToU8(binary, true)))
+}

tools/helper/src/client/utils/index.ts

@@ -0,0 +1 @@
+export * from './data.js'

tools/helper/src/node/utils/data.ts

@@ -0,0 +1,26 @@
+import type { DeflateOptions } from 'fflate'
+import { strFromU8, strToU8, unzlibSync, zlibSync } from 'fflate/node'
+
+/**
+ * Encode and compress data
+ */
+export const encodeData = (
+  data: string,
+  level: DeflateOptions['level'] = 6,
+): string => {
+  const buffer = strToU8(data)
+  // zlib headers can be found at https://stackoverflow.com/a/54915442
+  const zipped = zlibSync(buffer, { level })
+  const binary = strFromU8(zipped, true)
+
+  return Buffer.from(binary, 'binary').toString('base64')
+}
+
+/**
+ * Decode and unzip data
+ */
+export const decodeData = (base64: string): string => {
+  const binary = Buffer.from(base64, 'base64').toString('binary')
+
+  return strFromU8(unzlibSync(strToU8(binary, true)))
+}

tools/helper/src/node/utils/index.ts

@@ -1,3 +1,4 @@
+export * from './data.js'
 export * from './getInstalledStatus.js'
 export * from './getRealPath.js'
 export * from './logger.js'

tools/helper/tests/data.spec.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it, vi } from 'vitest'
+import {
+  encodeData as clientDecodeData,
+  decodeData as clientEncodeData,
+} from '../src/client/utils/data.js'
+import {
+  encodeData as nodeDecodeData,
+  decodeData as nodeEncodeData,
+} from '../src/node/utils/data.js'
+
+// mock define value
+vi.stubGlobal('__VUEPRESS_SSR__', false)
+
+const words = [
+  'Hello world.',
+  'Lorem ipsum dolor sit amet consectetur adipisicing elit. Dolores quasi consequatur sed accusamus repellendus mollitia dolore facilis perferendis provident, sint a tempora quos eveniet temporibus? Ipsum quasi adipisci voluptatibus fuga?',
+  '中国制造',
+  '昔人已乘黄鹤去⑵，此地空余黄鹤楼。黄鹤一去不复返，白云千载空悠悠⑶。晴川历历汉阳树⑷，芳草萋萋鹦鹉洲⑸。日暮乡关何处是⑹？烟波江上使人愁⑺',
+]
+
+const compressed = [
+  'eNrzSM3JyVcozy/KSdEDAB0WBGs=',
+  'eNoljkGOAyEMBL/SD1jtF3LJJVI+4UBPZAkwwWbeHybcSlZZXU8brNDusyJbsQHXgFQGkjVnCsYckKxdXZO2N1g0/nG/ZDo+U1y3u/BynRmS0nSp0zHYWQpbXlytrF+VvUQckrSoo3McHMu5eNipmS3+VklbKQjWbkPWkjl4sumK20d9Tb/h8avfITs0KU4rs4fEpeCYb7l9ATPWWYk=',
+  'eNp7smPt09l7n3Zse9mwAAA6rwiz',
+  'eNolj9sKgkAURX+9iwVWRgNFGoUVFvTQVUtndPBfpnOOM0/+QieE9bBh7/WwKVyCUpi/QIau9JxMcF4a8W6rGV0T3D6aiwIddRWdqm9v0GUoeryEIsAksPWS902kQQkMhlZrtmiwZ4z4sEJRhvkO52OGnr4LU9oLI3K27CS1gW8XU8bJs5M+ZS8jir+1PtHmBvKAoxT0ChOPwrsRsq3iZhhTeqRnDMUEdM0XyOsboX7tYJUm',
+]
+
+const browserUtoaResults = words.map((word) => clientDecodeData(word))
+const browserAtouResults = compressed.map((data) => clientEncodeData(data))
+
+const nodeUtoaResults = words.map((word) => nodeDecodeData(word))
+const nodeAutoResults = compressed.map((data) => nodeEncodeData(data))
+
+describe('props', () => {
+  it('utoa should return same result', () => {
+    expect(browserUtoaResults).toEqual(nodeUtoaResults)
+  })
+
+  it('atou should return same result', () => {
+    expect(browserAtouResults).toEqual(nodeAutoResults)
+  })
+
+  it('transform should return itself', () => {
+    expect(browserUtoaResults.map((word) => nodeEncodeData(word))).toEqual(
+      words,
+    )
+    expect(nodeUtoaResults.map((word) => nodeEncodeData(word))).toEqual(words)
+  })
+})