mirror of https://github.com/01-edu/public.git
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import * as cp from 'child_process' |
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import fs from 'fs/promises' |
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import { join, resolve, isAbsolute } from 'path' |
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import { tmpdir } from 'os' |
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import { promisify } from 'util' |
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const mkdir = fs.mkdir |
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const rmdir = fs.rmdir |
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const writeFile = fs.writeFile |
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const readFile = fs.readFile |
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const exec = promisify(cp.exec) |
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export const tests = [] |
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const name = 'tell-it-cypher' |
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// maybe get the sames from an api? like https://parser.name/
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const guests = [ |
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'Shyam Langley', |
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'Austin Harwood', |
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'Reem Morgan', |
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'Neal Chamberlain', |
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'Ryan Walters', |
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'Ocean Battle', |
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'Ubaid Ballard', |
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'Victoria Chan', |
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'Dominika Mullen', |
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'Heath Denton', |
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'Lilith Hamilton', |
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'Aisling Bailey', |
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'Maizie Love', |
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'Nathanial Franco', |
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'Charmaine Bernard', |
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'Sohail Downes', |
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'Rabia Gomez', |
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'Brendan Brennan', |
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'Shannen Atherton', |
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'Esa Villarreal', |
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'Kayla Wynn', |
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'Gladys Hardy', |
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'Laaibah Rogers', |
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'Zishan Randolph', |
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'Connor Connolly', |
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'Arabella Wooten', |
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'Edna Floyd', |
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] |
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const shuffle = (arr) => { |
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let i = arr.length |
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let j, tmp |
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while (--i > 0) { |
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j = Math.floor(Math.random() * (i + 1)) |
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tmp = arr[j] |
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arr[j] = arr[i] |
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arr[i] = tmp |
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} |
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return arr |
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} |
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const getRandomList = (names) => |
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shuffle(names).slice(0, Math.floor(Math.random() * (names.length - 10) + 10)) |
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const getExpected = (list) => |
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list |
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.map((n) => |
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n |
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.split(' ') |
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.reverse() |
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.join(' '), |
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) |
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.sort() |
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.map((g, i) => `${i + 1}. ${g}`) |
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.join('\n') |
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export const setup = async () => { |
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const dir = tmpdir() |
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// check if already exists and rm?
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await mkdir(`${dir}/${name}`) |
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const randomList = getRandomList(guests) |
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const decoded = getExpected(randomList) |
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const encoded = Buffer.from(decoded).toString('base64') |
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await writeFile(`${dir}/${name}/encoded.txt`, encoded) |
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await writeFile(`${dir}/${name}/decoded.txt`, decoded) |
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return { tmpPath: `${dir}/${name}`, decoded, encoded } |
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} |
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const cypherIt = async ({ keyword, newFile, ctx, path, eq }) => { |
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const scriptPath = join(resolve(), path) |
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const filename = keyword === "encode" ? "decoded.txt" : "encoded.txt" |
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await exec(`node ${scriptPath} ${filename} ${keyword} ${newFile ? newFile : ""}`, { |
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cwd: ctx.tmpPath, |
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}) |
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const newFileName = newFile || (keyword === "encode" ? "cypher.txt" : "clear.txt") |
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const out = await readFile(`${ctx.tmpPath}/${newFileName}`, 'utf8').catch((err) => |
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err.code === 'ENOENT' ? 'output file not found' : err, |
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) |
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await exec(`rm ${newFileName}`, { cwd: ctx.tmpPath }) |
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return eq(out, keyword === "encode" ? ctx.encoded : ctx.decoded) |
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} |
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tests.push(async ({ path, eq, ctx }) => { |
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return cypherIt({ |
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path, |
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eq, |
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ctx, |
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keyword: 'encode', |
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}) |
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}) |
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|
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tests.push(async ({ path, eq, ctx }) => { |
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return cypherIt({ |
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path, |
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eq, |
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ctx, |
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keyword: 'decode', |
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}) |
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}) |
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|
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tests.push(async ({ path, eq, ctx }) => { |
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return cypherIt({ |
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path, |
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eq, |
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ctx, |
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keyword: 'encode', |
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newFile: 'mysecret.txt', |
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}) |
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}) |
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|
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tests.push(async ({ path, eq, ctx }) => { |
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return cypherIt({ |
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path, |
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eq, |
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ctx, |
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keyword: 'decode', |
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newFile: 'pandora.txt', |
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}) |
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}) |
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Object.freeze(tests) |
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## tell-it-cypher |
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### Instructions |
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FINALLY, you got the names. |
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But you could forget it... loose it... How could you write it without puting the surprise in danger?! |
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Create a `tell-it-cypher.mjs` script that: |
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- Takes a file as first argument |
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- Takes one of these keywords as second argument: |
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- `encode`: convert your file from `utf8` to `base64`, then save the result in a `cypher.txt` file. |
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- `decode`: convert your file from `base64` to `utf8`, then save the result in a `clear.txt` file. |
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- Could take a string as third argument and use it as the new file name. Extension must be precised. |
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### Notions |
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- [Node buffer: `.from()`](https://nodejs.org/docs/latest/api/buffer.html#buffer_static_method_buffer_from_string_encoding) |
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- [Node buffer: `.toString()`](https://nodejs.org/api/buffer.html#buffer_buf_tostring_encoding_start_end) |
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