Add packages/captcha (untested)

package.json

@@ -20,7 +20,8 @@
     "@rondo.dev/validator": "file:packages/validator",
     "@rondo.dev/db": "file:packages/db",
     "@rondo.dev/db-typeorm": "file:packages/db-typeorm",
-    "@rondo.dev/middleware": "file:packages/middleware"
+    "@rondo.dev/middleware": "file:packages/middleware",
+    "@rondo.dev/captcha": "file:packages/captcha"
   },
   "devDependencies": {
     "@types/bcrypt": "^3.0.0",

packages/captcha/jest.config.js

@@ -0,0 +1,16 @@
+module.exports = {
+  roots: [
+    '<rootDir>/src',
+  ],
+  transform: {
+    '^.+\\.tsx?$': 'ts-jest',
+  },
+  testRegex: '(/__tests__/.*|\\.(test|spec))\\.tsx?$',
+  moduleFileExtensions: [
+    'ts',
+    'tsx',
+    'js',
+    'jsx',
+  ],
+  setupFiles: ['<rootDir>/jest.setup.js'],
+}

packages/captcha/jest.setup.js

@@ -0,0 +1,4 @@
+if (!process.env.LOG) {
+  process.env.LOG = 'sql:warn'
+}
+process.chdir(__dirname)

packages/captcha/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "@rondo.dev/captcha",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "test": "jest",
+    "lint": "tslint --project .",
+    "compile": "tsc",
+    "clean": "rm -rf lib/"
+  },
+  "dependencies": {},
+  "main": "lib/index.js",
+  "module": "esm/index.js",
+  "types": "lib/index.d.ts"
+}

packages/captcha/src/audio.ts

@@ -0,0 +1,84 @@
+import { spawn } from 'child_process'
+import { Request, Response } from 'express'
+import { Readable } from 'stream'
+
+export async function audio(req: Request, res: Response) {
+  // TODO generate random string
+  const captcha = 'test'
+  req.session!.captcha = captcha
+  const speech = await speak('test')
+  res.type(speech.contentType)
+  speech.stdout.pipe(res)
+}
+
+async function speak(text: string) {
+  const streams: ReadableWritable[] = [
+    await espeak(),
+    await opus(),
+  ]
+
+  const last = streams.reduce((prev, proc) => {
+    prev.stdout.pipe(proc.stdin)
+    return proc
+  }, createTextStream(text))
+
+  return last
+}
+
+interface ReadableProcess {
+  stdout: NodeJS.ReadableStream
+  contentType: string
+}
+
+interface WritableProcess {
+  stdin: NodeJS.WritableStream
+}
+
+interface ReadableWritable extends ReadableProcess, WritableProcess {
+
+}
+
+export function espeak() {
+  return run(
+    'espeak',
+    ['-k', '2', '-s', '90', '--stdin', '--stdout'],
+    'audio/wav',
+  )
+}
+
+async function opus() {
+  return run('opusenc', ['-', '-'], 'audio/opus')
+}
+
+class TextStream extends Readable {
+  constructor(text: string) {
+    super()
+    this.push(text)
+    this.push(null)
+  }
+  _read() {/* noop */}
+}
+
+function createTextStream(text: string): ReadableProcess {
+  return {
+    stdout: new TextStream(text),
+    contentType: 'text/plain',
+  }
+}
+
+async function run(
+  cmd: string, args: string[], contentType: string,
+): Promise<ReadableWritable> {
+  return new Promise((resolve, reject) => {
+    const p = spawn(cmd, args)
+
+    p.once('error', err => {
+      console.error(err.stack)
+      reject(err)
+    })
+
+    if (p.pid) {
+      resolve({ stdin: p.stdin, stdout: p.stdout, contentType })
+    }
+  })
+}

packages/captcha/src/image.ts

@@ -0,0 +1,10 @@
+import SVGCaptcha from 'svg-captcha'
+import { Request, Response } from 'express'
+
+export function image(req: Request, res: Response) {
+  const { text, data } = SVGCaptcha.create()
+  req.session!.captcha = text
+  res.type('svg')
+  res.status(200)
+  res.send(data)
+}

packages/captcha/src/index.ts

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

packages/captcha/tsconfig.esm.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "esm"
+  },
+  "references": [
+  ]
+}

packages/captcha/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../tsconfig.common.json",
+  "compilerOptions": {
+    "outDir": "lib",
+    "rootDir": "src"
+  },
+  "references": [
+  ]
+}