first commit 🎉

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+*/.env
+
+# package directories
+node_modules
+
+# Mac files
+.DS_Store

README.md

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+<div align="center">
+  <img alt="GitHub Sponsors + streamlabs" src="./frontend/static/banner.png" />
+</div>
+<br />
+<div align="center">
+  <strong>Streaming alerts for GitHub Sponsors</strong>
+</div>
+
+_Trigger real-time [streamlabs](https://streamlabs.com/) subscription alerts when someone sponsors you on [GitHub](https://github.com/sponsors)._
+
+## :link: Live Website
+
+Here's the [live website](https://streamlabs-github-sponsors.netlify.com).
+
+## :pencil2: Contributing
+
+Any idea on how to make the process easier? [Open a new issue](https://github.com/mathieudutour/streamlabs-github-sponsors-alerts/issues/new)! We need all the help we can get to make this project awesome!
+
+## :shell: Technical stack
+
+This project is only possible thanks to the awesomeness of the following projects:
+
+- [Gatsby](https://www.gatsbyjs.org/)
+- [Serverless](https://www.serverless.com/)
+- [AWS Lambda](https://aws.amazon.com/)
+- [Netlify](https://netlify.com)
+- [streamlabs](https://streamlabs.com/)
+- [GitHub Sponsors](https://github.com/sponsors)
+
+## :tm: License
+
+MIT

backend/.gitignore

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+# Serverless directories
+.serverless
+
+# Webpack directories
+.webpack
+
+# secrets
+config.*.yml
+github-app.*.pem

backend/example.config.yml

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+# https://streamlabs.com/dashboard#/apps
+STREAMLABS_CLIENT_ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+STREAMLABS_CLIENT_SECRET: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

backend/lib/_handler.ts

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+import { APIGatewayProxyEvent, APIGatewayProxyHandler } from 'aws-lambda'
+import { User } from './model'
+import { findUserByToken } from './storage'
+import { Unauthorized } from './errors'
+
+export const _handler = (
+  fn: (event: APIGatewayProxyEvent) => Promise<any>
+): APIGatewayProxyHandler => async (event: APIGatewayProxyEvent) => {
+  try {
+    const result = (await fn(event)) || {}
+
+    return {
+      statusCode: result.statusCode || 200,
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Access-Control-Allow-Credentials': true,
+        ...(result.headers || {}),
+      },
+      body: result.isBase64Encoded ? result.result : JSON.stringify(result),
+      isBase64Encoded: result.isBase64Encoded,
+    }
+  } catch (err) {
+    console.error(err)
+    return {
+      statusCode: err.statusCode || 500,
+      headers: {
+        'Access-Control-Allow-Origin': '*',
+        'Access-Control-Allow-Credentials': true,
+      },
+      body: JSON.stringify({
+        message: err.message,
+        data: err.data,
+      }),
+    }
+  }
+}
+
+export const _withAuth = (
+  fn: (event: APIGatewayProxyEvent, user: User) => Promise<any>
+): ((event: APIGatewayProxyEvent) => Promise<any>) => async (
+  event: APIGatewayProxyEvent
+) => {
+  if (!event.headers || !event.headers.Authorization) {
+    throw new Unauthorized('Missing "Authorization" header.')
+  }
+
+  const token = event.headers.Authorization.replace('Bearer ', '')
+
+  const user = await findUserByToken(token)
+
+  if (!user) {
+    throw new Unauthorized('No valid API key provided.')
+  }
+
+  return await fn(event, user)
+}

backend/lib/errors.ts

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+export class BadRequest extends Error {
+  statusCode = 400
+  data = null
+}
+
+export class NotFound extends Error {
+  statusCode = 404
+  data = null
+}
+
+export class Unauthorized extends Error {
+  statusCode = 401
+  data = null
+}
+
+export class Forbidden extends Error {
+  statusCode = 403
+  data = null
+}

backend/lib/model/index.ts

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+export * from './user'

backend/lib/model/user.ts

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+export type User = {
+  id: string // index
+  username: string
+  createdAt: number
+  lastSeenAt: number
+
+  // token by the user to make authenticated calls
+  token: string
+
+  // streamlabs OAuth
+  streamlabsId?: string
+  streamlabsToken?: string
+  streamlabsRefreshToken?: string
+
+  // alert customization https://dev.streamlabs.com/v1.0/reference#alerts
+  image_href?: string
+  sound_href?: string
+  message?: string
+  user_message?: string
+  duration?: string
+  special_text_color?: string
+}

backend/lib/oauth/streamlabs.ts

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+import * as qs from 'querystring'
+import fetch from 'node-fetch'
+import { User } from '../model'
+import { createUser, findUserByStreamlabsId, updateUser } from '../storage'
+import { _handler } from '../_handler'
+import { BadRequest } from '../errors'
+
+async function authenticate(
+  code: string
+): Promise<{
+  access_token: string
+  refresh_token: string
+  token_type: 'Bearer'
+  expires_in: number
+}> {
+  const res = await fetch(`https://streamlabs.com/api/v1.0/token`, {
+    method: 'POST',
+    headers: {
+      Accept: 'application/json',
+      'Content-Type': 'application/x-www-form-urlencoded',
+    },
+    body: qs.stringify({
+      grant_type: 'authorization_code',
+      redirect_uri: `${process.env.BASE_API_URL}/oauth/streamlabs`,
+      client_id: process.env.STREAMLABS_CLIENT_ID,
+      client_secret: process.env.STREAMLABS_CLIENT_SECRET,
+      code,
+    }),
+  })
+
+  const data = await res.json()
+
+  if (!res.ok) {
+    const error = new BadRequest(data.message || data.error_description)
+    error.statusCode = res.status
+    throw error
+  }
+
+  return data
+}
+
+export const handler = _handler(async event => {
+  const { access_token, refresh_token } = await authenticate(
+    event.queryStringParameters.code
+  )
+
+  const res = await fetch(
+    `https://streamlabs.com/api/v1.0/user?access_token=${access_token}`
+  )
+
+  const data = await res.json()
+
+  if (!res.ok) {
+    const error = new BadRequest(data.message)
+    error.statusCode = res.status
+    error.data = data
+    throw error
+  }
+
+  const streamlabsId = String(data.streamlabs.id)
+  const existingUser = await findUserByStreamlabsId(streamlabsId)
+
+  let user: User
+  if (existingUser) {
+    await updateUser(existingUser, {
+      username: data.streamlabs.display_name,
+      streamlabsToken: access_token,
+      streamlabsRefreshToken: refresh_token,
+    })
+    user = existingUser
+  } else {
+    user = await createUser({
+      username: data.streamlabs.display_name,
+      streamlabsId,
+      streamlabsToken: access_token,
+      streamlabsRefreshToken: refresh_token,
+    })
+  }
+
+  const { redirect } = event.pathParameters || {}
+
+  return {
+    statusCode: 301,
+    headers: {
+      Location: `https://streamlabs-github-sponsors.netlify.com/oauth-redirect?token=${
+        user.token
+      }${redirect ? `&redirect=${encodeURIComponent(redirect)}` : ''}`,
+    },
+  }
+})

backend/lib/rest.ts

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+import { _handler, _withAuth } from './_handler'
+import { updateUser } from './storage'
+
+export const me = _handler(
+  _withAuth(async (_, user) => {
+    return {
+      id: user.id,
+      username: user.username,
+      image_href: user.image_href,
+      sound_href: user.sound_href,
+      message: user.message,
+      user_message: user.user_message,
+      duration: user.duration,
+      special_text_color: user.special_text_color,
+    }
+  })
+)
+
+export const updateMe = _handler(
+  _withAuth(async (event, user) => {
+    const body = JSON.parse(event.body)
+    await updateUser(user, {
+      image_href: body.image_href,
+      sound_href: body.sound_href,
+      message: body.message,
+      user_message: body.user_message,
+      duration: body.duration,
+      special_text_color: body.special_text_color,
+    })
+    return {
+      ok: true,
+    }
+  })
+)

backend/lib/storage.ts

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+import * as AWS from 'aws-sdk'
+import { generate as randomString } from 'randomstring'
+import { User } from './model'
+
+const db = new AWS.DynamoDB.DocumentClient()
+const { USERS_TABLE_NAME } = process.env
+
+export const findUser = async (id: string): Promise<User | undefined> => {
+  if (!id) {
+    return Promise.resolve(undefined)
+  }
+  const meta = await db
+    .get({
+      TableName: USERS_TABLE_NAME,
+      Key: {
+        id: String(id),
+      },
+    })
+    .promise()
+  return (meta || { Item: undefined }).Item as User
+}
+
+export const findUserByToken = async (
+  token: string
+): Promise<User | undefined> => {
+  if (!token) {
+    return Promise.resolve(undefined)
+  }
+  const meta = await db
+    .query({
+      TableName: USERS_TABLE_NAME,
+      IndexName: 'tokenIndex',
+      KeyConditionExpression: '#token = :token',
+      ExpressionAttributeNames: {
+        '#token': 'token',
+      },
+      ExpressionAttributeValues: { ':token': token },
+      Limit: 1,
+    })
+    .promise()
+  return (meta || { Items: [] }).Items[0] as User
+}
+
+export const findUserByStreamlabsId = async (
+  streamlabsId: string
+): Promise<User | undefined> => {
+  if (!streamlabsId) {
+    return Promise.resolve(undefined)
+  }
+  const meta = await db
+    .query({
+      TableName: USERS_TABLE_NAME,
+      IndexName: 'streamlabsIdIndex',
+      KeyConditionExpression: '#streamlabsId = :streamlabsId',
+      ExpressionAttributeNames: {
+        '#streamlabsId': 'streamlabsId',
+      },
+      ExpressionAttributeValues: { ':streamlabsId': streamlabsId },
+      Limit: 1,
+    })
+    .promise()
+  return (meta || { Items: [] }).Items[0] as User
+}
+
+export const updateUser = async (data: User, body?: Partial<User>) => {
+  data.lastSeenAt = Date.now()
+  if (body) {
+    data = Object.assign(data, body)
+    Object.keys(body).forEach(k => {
+      if (typeof body[k] === 'string' && !body[k]) {
+        delete data[k]
+      }
+    })
+  }
+  await db
+    .put({
+      TableName: USERS_TABLE_NAME,
+      Item: data,
+    })
+    .promise()
+  return data
+}
+
+export const createUser = async (
+  data: Pick<
+    User,
+    'username' | 'streamlabsId' | 'streamlabsToken' | 'streamlabsRefreshToken'
+  >
+) => {
+  const user: User = {
+    id: randomString(),
+    ...data,
+
+    // generate a random API key
+    token: randomString(),
+
+    createdAt: Date.now(),
+    lastSeenAt: Date.now(),
+  }
+
+  await db
+    .put({
+      TableName: USERS_TABLE_NAME,
+      Item: user,
+    })
+    .promise()
+  return user
+}

backend/lib/webhook/github.ts

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+import crypto from 'crypto'
+import * as qs from 'querystring'
+import fetch from 'node-fetch'
+import {
+  _handler
+} from '../_handler'
+import {
+  BadRequest
+} from '../errors'
+import {
+  findUser
+} from '../storage'
+
+function signRequestBody(key: string, body: string) {
+  return `sha1=${crypto
+    .createHmac('sha1', key)
+    .update(body, 'utf8')
+    .digest('hex')}`
+}
+
+function replaceTemplate(string: string, payload: WebhookPayloadSponsorship) {
+  return string
+    .replace(/GITHUB_USERNAME/g, payload.sponsorship.sponsor.login)
+    .replace(/TIER_PRICE/g, payload.sponsorship.tier.monthly_price_in_dollars.toString())
+}
+
+type GitHubUser = {
+  login: string
+  id: number
+  node_id: string
+  avatar_url: string
+  gravatar_id: string
+  url: string
+  html_url: string
+  followers_url: string
+  following_url: string
+  gists_url: string
+  starred_url: string
+  subscriptions_url: string
+  organizations_url: string
+  repos_url: string
+  events_url: string
+  received_events_url: string
+  type: 'User'
+  site_admin: false
+}
+
+type Tier = {
+  node_id: string
+  created_at: string
+  description: string
+  monthly_price_in_cents: number
+  monthly_price_in_dollars: number
+  name: string
+}
+
+type WebhookPayloadSponsorship = {
+  sponsorship: {
+    node_id: string
+    created_at: string
+    maintainer: GitHubUser
+    sponsor: GitHubUser
+    privacy_level: 'public' | 'private'
+    tier: Tier
+  }
+  sender: GitHubUser
+} & ( |
+  {
+    action: 'created'
+  } |
+  {
+    action: 'edited'
+    changes: {
+      privacy_level: 'public' | 'private'
+    }
+  } |
+  {
+    action: 'tier_changed' // upgrade
+    changes: {
+      tier: {
+        from: Tier
+      }
+    }
+  } |
+  {
+    action: 'pending_tier_change' // downgrade
+    changes: {
+      tier: {
+        from: Tier
+      }
+    }
+    effective_date: string
+  } |
+  {
+    action: 'pending_cancellation'
+    effective_date: string
+  } |
+  {
+    action: 'cancelled'
+  })
+
+export const handler = _handler(async event => {
+  const userId = event.pathParameters.userId
+
+  if (!userId) {
+    throw new BadRequest('Missing user id')
+  }
+
+  const user = await findUser(userId)
+
+  if (!userId) {
+    throw new BadRequest('cannot find user')
+  }
+
+  const sig = event.headers['X-Hub-Signature']
+  const githubEvent = event.headers['X-GitHub-Event']
+  const id = event.headers['X-GitHub-Delivery']
+
+  if (!sig) {
+    throw new BadRequest('No X-Hub-Signature found on request')
+  }
+
+  if (!githubEvent) {
+    throw new BadRequest('No X-Github-Event found on request')
+  }
+
+  if (!id) {
+    throw new BadRequest('No X-Github-Delivery found on request')
+  }
+
+  const calculatedSig = signRequestBody(user.token, event.body)
+
+  if (sig !== calculatedSig) {
+    throw new BadRequest(
+      "X-Hub-Signature incorrect. Github webhook token doesn't match"
+    )
+  }
+
+  /* eslint-disable */
+  console.log('---------------------------------')
+  console.log(`Github-Event: "${githubEvent}"`)
+  console.log('---------------------------------')
+  console.log('Payload', event.body)
+  /* eslint-enable */
+
+  const body: unknown = JSON.parse(event.body || '{}')
+
+  // For more on events see https://developer.github.com/v3/activity/events/types/
+  switch (githubEvent) {
+    case 'sponsorship': {
+      const payload = body as WebhookPayloadSponsorship
+
+      if (payload.action === 'created' || payload.action === 'tier_changed') {
+        const data: {[key: string]: string} = {
+          access_token: user.streamlabsToken,
+          type: 'subscription',
+          message: replaceTemplate(user.message || '*GITHUB_USERNAME* just sponsored!', payload)
+        }
+
+        if (user.image_href) {
+          data.image_href = user.image_href
+        }
+
+        if (user.sound_href) {
+          data.sound_href = user.sound_href
+        }
+
+        if (user.duration) {
+          data.duration = user.duration
+        }
+
+        if (user.special_text_color) {
+          data.special_text_color = user.special_text_color
+        }
+
+        if (user.special_text_color) {
+          data.special_text_color = user.special_text_color
+        }
+
+        if (user.user_message) {
+          data.user_message = replaceTemplate(user.user_message, payload)
+        }
+
+        await fetch(`https://streamlabs.com/api/v1.0/alerts`, {
+          method: 'POST',
+          headers: {
+            Accept: 'application/json',
+            'Content-Type': 'application/json',
+          },
+          body: qs.stringify(data),
+        })
+      }
+
+      return { message: 'pong' }
+    }
+    default:
+      return { message: 'pong' }
+  }
+})

backend/package.json

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+{
+  "name": "streamlabs-github-sponsors-alerts-backend",
+  "private": true,
+  "version": "1.0.0",
+  "description": "",
+  "main": "handler.js",
+  "scripts": {
+    "lint": "find . -name \"*.ts\" | grep -v -f .gitignore | xargs eslint",
+    "prettier:base": "prettier --write",
+    "prettify": "find . -name \"*.ts\" | grep -v -f .gitignore | xargs npm run prettier:base",
+    "deploy:dev": "serverless deploy -s dev",
+    "deploy:prod": "serverless deploy -s production",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "dependencies": {
+    "node-fetch": "^2.6.0",
+    "randomstring": "^1.1.5"
+  },
+  "devDependencies": {
+    "@types/aws-lambda": "^8.10.39",
+    "@types/bcryptjs": "^2.4.2",
+    "@types/node": "^13.1.4",
+    "@types/node-fetch": "^2.5.4",
+    "@types/randomstring": "^1.1.6",
+    "aws-sdk": "^2.598.0",
+    "prettier": "^1.19.1",
+    "serverless-webpack": "^5.3.1",
+    "source-map-support": "^0.5.16",
+    "ts-loader": "^6.2.1",
+    "typescript": "^3.7.4",
+    "webpack": "^4.41.5"
+  },
+  "prettier": {
+    "proseWrap": "never",
+    "singleQuote": true,
+    "trailingComma": "es5",
+    "semi": false
+  }
+}

backend/serverless.yml

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+service:
+  name: streamlabs-github-sponsors
+
+custom:
+  usersTableName: streamlabs-github-users-${self:provider.stage}
+
+plugins:
+  - serverless-webpack
+
+provider:
+  name: aws
+  runtime: nodejs10.x
+  region: ${opt:region, 'eu-west-1'}
+  stage: ${opt:stage, 'dev'}
+  environment:
+    BASE_API_URL:
+      'Fn::Join':
+        - ''
+        - - 'https://'
+          - { 'Ref': 'ApiGatewayRestApi' }
+          - '.execute-api.${self:provider.region}.amazonaws.com/${self:provider.stage}'
+    ENV: ${self:provider.stage}
+    USERS_TABLE_NAME: ${self:custom.usersTableName}
+    STREAMLABS_CLIENT_ID: ${file(./config.${self:provider.stage}.yml):STREAMLABS_CLIENT_ID}
+    STREAMLABS_CLIENT_SECRET: ${file(./config.${self:provider.stage}.yml):STREAMLABS_CLIENT_SECRET}
+  iamRoleStatements:
+    - Effect: 'Allow'
+      Action:
+        - 'dynamodb:*'
+      Resource:
+        - arn:aws:dynamodb:*:*:table/${self:custom.usersTableName}
+        - arn:aws:dynamodb:*:*:table/${self:custom.usersTableName}/*
+
+functions:
+  streamlabsOauth:
+    handler: lib/oauth/streamlabs.handler
+    events:
+      - http:
+          method: get
+          path: oauth/streamlabs
+          cors: true
+  me:
+    handler: lib/rest.me
+    events:
+      - http:
+          method: get
+          path: me
+          cors: true
+  updateMe:
+    handler: lib/rest.updateMe
+    events:
+      - http:
+          method: put
+          path: me
+          cors: true
+  githubWebhook:
+    handler: lib/webhook/github.handler
+    events:
+      - http:
+          method: post
+          path: webhook/github/{userId}
+          cors: true
+
+resources:
+  Resources:
+    UsersDynamoDbTable:
+      Type: 'AWS::DynamoDB::Table'
+      DeletionPolicy: Retain
+      Properties:
+        AttributeDefinitions:
+          - AttributeName: id
+            AttributeType: S
+          - AttributeName: token
+            AttributeType: S
+          - AttributeName: streamlabsId
+            AttributeType: S
+        KeySchema:
+          - AttributeName: id
+            KeyType: HASH
+        GlobalSecondaryIndexes:
+          - IndexName: streamlabsIdIndex
+            KeySchema:
+              - AttributeName: streamlabsId
+                KeyType: HASH
+            Projection:
+              ProjectionType: ALL
+            ProvisionedThroughput:
+              ReadCapacityUnits: 1
+              WriteCapacityUnits: 1
+          - IndexName: tokenIndex
+            KeySchema:
+              - AttributeName: token
+                KeyType: HASH
+            Projection:
+              ProjectionType: ALL
+            ProvisionedThroughput:
+              ReadCapacityUnits: 1
+              WriteCapacityUnits: 1
+        ProvisionedThroughput:
+          ReadCapacityUnits: 1
+          WriteCapacityUnits: 1
+        TableName: ${self:custom.usersTableName}

backend/source-map-install.js

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+require('source-map-support').install()

backend/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "lib": ["es2017"],
+    "moduleResolution": "node",
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "sourceMap": true,
+    "target": "es2017",
+    "outDir": "lib",
+    "allowSyntheticDefaultImports": true
+  },
+  "exclude": ["node_modules"]
+}

backend/webpack.config.js

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+const path = require('path')
+const slsw = require('serverless-webpack')
+
+const entries = {}
+
+Object.keys(slsw.lib.entries).forEach(key => {
+  entries[key] = ['./source-map-install.js', slsw.lib.entries[key]]
+})
+
+module.exports = {
+  mode: slsw.lib.webpack.isLocal ? 'development' : 'production',
+  entry: entries,
+  devtool: 'source-map',
+  resolve: {
+    extensions: ['.js', '.jsx', '.json', '.ts', '.tsx'],
+  },
+  output: {
+    libraryTarget: 'commonjs',
+    path: path.join(__dirname, '.webpack'),
+    filename: '[name].js',
+  },
+  target: 'node',
+  module: {
+    rules: [
+      // all files with a `.ts` or `.tsx` extension will be handled by `ts-loader`
+      { test: /\.tsx?$/, loader: 'ts-loader' },
+    ],
+  },
+  externals: [
+    (context, request, callback) => {
+      if (request === 'aws-sdk') {
+        return callback(null, `commonjs ${request}`)
+      }
+
+      return callback()
+    },
+  ],
+}

frontend/.gitignore

@@ -0,0 +1,6 @@
+# dotenv environment variables file
+.env
+
+# gatsby files
+.cache/
+public

frontend/gatsby-config.js

@@ -0,0 +1,37 @@
+module.exports = {
+  siteMetadata: {
+    title: 'Streamlabs GitHub Sponsors',
+    description: `Trigger subscription alerts when someone sponsors you on GitHub`,
+    author: `@mathiedutour`,
+    siteUrl: `https://streamlabs-github-sponsors.netlify.com`,
+    keywords: `streamlabs, twitch, streaming, alerts, github sponsors, subscriptions`,
+  },
+  plugins: [
+    'gatsby-plugin-react-helmet',
+    {
+      resolve: `gatsby-source-filesystem`,
+      options: {
+        name: `images`,
+        path: `${__dirname}/src/images`,
+      },
+    },
+    'gatsby-transformer-sharp',
+    'gatsby-plugin-sharp',
+    `gatsby-plugin-sitemap`,
+    {
+      resolve: `gatsby-plugin-manifest`,
+      options: {
+        name: 'Streamlabs GitHub Sponsors',
+        short_name: 'Streamlabs GitHub Sponsors',
+        start_url: '/',
+        background_color: '#663399',
+        theme_color: '#663399',
+        display: 'minimal-ui',
+        icon: 'src/images/icon.png', // This path is relative to the root of the site.
+      },
+    },
+    `gatsby-plugin-typescript`,
+    `gatsby-plugin-emotion`,
+    `gatsby-plugin-netlify`,
+  ],
+}

frontend/package.json

@@ -0,0 +1,55 @@
+{
+  "name": "streamlabs-github-sponsors-alerts",
+  "private": true,
+  "description": "Trigger subscription alerts when someone sponsors you on GitHub",
+  "version": "1.0.0",
+  "author": "Mathieu Dutour",
+  "dependencies": {
+    "@emotion/core": "^10.0.27",
+    "@emotion/styled": "^10.0.27",
+    "gatsby": "^2.18.18",
+    "gatsby-image": "^2.2.37",
+    "gatsby-plugin-emotion": "^4.1.18",
+    "gatsby-plugin-manifest": "^2.2.34",
+    "gatsby-plugin-netlify": "^2.1.30",
+    "gatsby-plugin-react-helmet": "^3.1.18",
+    "gatsby-plugin-sharp": "^2.3.10",
+    "gatsby-plugin-sitemap": "^2.2.24",
+    "gatsby-plugin-typescript": "^2.1.23",
+    "gatsby-source-filesystem": "^2.1.43",
+    "gatsby-transformer-sharp": "^2.3.9",
+    "react": "^16.12.0",
+    "react-dom": "^16.12.0",
+    "react-helmet": "^5.2.1"
+  },
+  "keywords": [
+    "streamlabs",
+    "twitch",
+    "streaming",
+    "alerts",
+    "github sponsors",
+    "subscriptions"
+  ],
+  "license": "MIT",
+  "scripts": {
+    "build": "gatsby build",
+    "develop": "gatsby develop",
+    "start": "npm run develop",
+    "clean": "gatsby clean",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "devDependencies": {
+    "@types/react-helmet": "^5.0.15",
+    "prettier": "^1.19.1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mathieudutour/streamlabs-github-sponsors-alerts"
+  },
+  "prettier": {
+    "proseWrap": "never",
+    "singleQuote": true,
+    "trailingComma": "es5",
+    "semi": false
+  }
+}

frontend/src/components/layout.css

@@ -0,0 +1,336 @@
+html {
+  -ms-text-size-adjust: 100%;
+  -webkit-text-size-adjust: 100%;
+}
+body {
+  margin: 0;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+article,
+aside,
+details,
+figcaption,
+figure,
+footer,
+header,
+main,
+menu,
+nav,
+section,
+summary {
+  display: block;
+}
+a {
+  color: #282828;
+  background-color: transparent;
+  -webkit-text-decoration-skip: objects;
+}
+a:active,
+a:hover {
+  outline-width: 0;
+}
+b,
+strong {
+  font-weight: inherit;
+  font-weight: bolder;
+}
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+img {
+  border-style: none;
+}
+svg:not(:root) {
+  overflow: hidden;
+}
+hr {
+  box-sizing: content-box;
+  height: 0;
+  overflow: visible;
+}
+button,
+input,
+select,
+textarea {
+  font: inherit;
+  margin: 0;
+}
+button,
+input {
+  overflow: visible;
+}
+button,
+select {
+  text-transform: none;
+}
+[type='reset'],
+[type='submit'],
+button,
+html [type='button'] {
+  -webkit-appearance: button;
+}
+[type='button']::-moz-focus-inner,
+[type='reset']::-moz-focus-inner,
+[type='submit']::-moz-focus-inner,
+button::-moz-focus-inner {
+  border-style: none;
+  padding: 0;
+}
+[type='button']:-moz-focusring,
+[type='reset']:-moz-focusring,
+[type='submit']:-moz-focusring,
+button:-moz-focusring {
+  outline: 1px dotted ButtonText;
+}
+fieldset {
+  border: 1px solid silver;
+  margin: 0 2px;
+  padding: 0.35em 0.625em 0.75em;
+}
+legend {
+  box-sizing: border-box;
+  color: inherit;
+  display: table;
+  max-width: 100%;
+  padding: 0;
+  white-space: normal;
+}
+::-webkit-input-placeholder {
+  color: inherit;
+  opacity: 0.54;
+}
+::-webkit-file-upload-button {
+  -webkit-appearance: button;
+  font: inherit;
+}
+
+html {
+  font: 112.5%/1.45em sans-serif;
+  box-sizing: border-box;
+  overflow-y: scroll;
+}
+* {
+  box-sizing: inherit;
+}
+*:before {
+  box-sizing: inherit;
+}
+*:after {
+  box-sizing: inherit;
+}
+body {
+  background: white;
+  color: #282828;
+  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen,
+    Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
+  font-weight: normal;
+  word-wrap: break-word;
+  font-kerning: normal;
+  -moz-font-feature-settings: 'kern', 'liga', 'clig', 'calt';
+  -ms-font-feature-settings: 'kern', 'liga', 'clig', 'calt';
+  -webkit-font-feature-settings: 'kern', 'liga', 'clig', 'calt';
+  font-feature-settings: 'kern', 'liga', 'clig', 'calt';
+}
+img {
+  max-width: 100%;
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+}
+h1 {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+  color: inherit;
+  font-weight: bold;
+  text-rendering: optimizeLegibility;
+  font-size: 2.25rem;
+  line-height: 1.1;
+}
+h2 {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+  color: inherit;
+  font-weight: bold;
+  text-rendering: optimizeLegibility;
+  font-size: 1.62671rem;
+  line-height: 1.1;
+}
+h3 {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+  color: inherit;
+  font-weight: bold;
+  text-rendering: optimizeLegibility;
+  font-size: 1.38316rem;
+  line-height: 1.1;
+}
+h4 {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+  color: inherit;
+  font-weight: bold;
+  text-rendering: optimizeLegibility;
+  font-size: 1rem;
+  line-height: 1.1;
+}
+h5 {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+  color: inherit;
+  font-weight: bold;
+  text-rendering: optimizeLegibility;
+  font-size: 0.85028rem;
+  line-height: 1.1;
+}
+h6 {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+  color: inherit;
+  font-weight: bold;
+  text-rendering: optimizeLegibility;
+  font-size: 0.78405rem;
+  line-height: 1.1;
+}
+ul {
+  margin-left: 1.45rem;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+  list-style-position: outside;
+  list-style-image: none;
+}
+ol {
+  margin-left: 1.45rem;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+  list-style-position: outside;
+  list-style-image: none;
+}
+p {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+}
+fieldset {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+}
+form {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: 1.45rem;
+}
+hr {
+  margin-left: 0;
+  margin-right: 0;
+  margin-top: 0;
+  padding-bottom: 0;
+  padding-left: 0;
+  padding-right: 0;
+  padding-top: 0;
+  margin-bottom: calc(1.45rem - 1px);
+  background: hsla(0, 0%, 0%, 0.2);
+  border: none;
+  height: 1px;
+}
+li {
+  margin-bottom: calc(1.45rem / 2);
+}
+ol li {
+  padding-left: 0;
+}
+ul li {
+  padding-left: 0;
+}
+li > ol {
+  margin-left: 1.45rem;
+  margin-bottom: calc(1.45rem / 2);
+  margin-top: calc(1.45rem / 2);
+}
+li > ul {
+  margin-left: 1.45rem;
+  margin-bottom: calc(1.45rem / 2);
+  margin-top: calc(1.45rem / 2);
+}
+li *:last-child {
+  margin-bottom: 0;
+}
+p *:last-child {
+  margin-bottom: 0;
+}
+li > p {
+  margin-bottom: calc(1.45rem / 2);
+}
+@media only screen and (max-width: 480px) {
+  html {
+    font-size: 100%;
+  }
+}

frontend/src/components/layout.tsx

@@ -0,0 +1,13 @@
+import React from 'react'
+
+import './layout.css'
+
+const Layout = ({ children }) => (
+  <>
+    <div>
+      <main>{children}</main>
+    </div>
+  </>
+)
+
+export default Layout

frontend/src/components/seo.tsx

@@ -0,0 +1,102 @@
+/**
+ * SEO component that queries for data with
+ *  Gatsby's useStaticQuery React hook
+ *
+ * See: https://www.gatsbyjs.org/docs/use-static-query/
+ */
+
+import React from 'react'
+import { Helmet } from 'react-helmet'
+import { useStaticQuery, graphql } from 'gatsby'
+
+function SEO({
+  description,
+  lang,
+  meta,
+  title,
+  keywords,
+}: {
+  description?: string
+  lang?: string
+  meta?: { property: string; content: any; name?: undefined }[]
+  title?: string
+  keywords?: string[]
+}) {
+  const { site } = useStaticQuery(
+    graphql`
+      query {
+        site {
+          siteMetadata {
+            title
+            description
+            author
+            keywords
+          }
+        }
+      }
+    `
+  )
+
+  const metaDescription = description || site.siteMetadata.description
+
+  return (
+    <Helmet
+      htmlAttributes={{
+        lang: lang || 'en',
+      }}
+      title={title || site.siteMetadata.title}
+      meta={[
+        {
+          name: `description`,
+          content: metaDescription,
+        },
+        {
+          property: `og:title`,
+          content: title || site.siteMetadata.title,
+        },
+        {
+          property: `og:image`,
+          content: 'https://streamlabs-github-sponsors.netlify.com/banner.png',
+        },
+        {
+          property: `og:url`,
+          content: 'https://streamlabs-github-sponsors.netlify.com/',
+        },
+        {
+          property: `og:description`,
+          content: metaDescription,
+        },
+        {
+          property: `og:type`,
+          content: `website`,
+        },
+        {
+          name: `twitter:card`,
+          content: `summary`,
+        },
+        {
+          name: `twitter:creator`,
+          content: site.siteMetadata.author,
+        },
+        {
+          name: `twitter:title`,
+          content: title,
+        },
+        {
+          name: `twitter:description`,
+          content: metaDescription,
+        },
+      ]
+        .concat({
+          name: `keywords`,
+          content:
+            (keywords || []).length > 0
+              ? keywords.join(`, `)
+              : site.siteMetadata.keywords,
+        })
+        .concat(meta || [])}
+    />
+  )
+}
+
+export default SEO

frontend/src/pages/404.tsx

@@ -0,0 +1,11 @@
+import React from 'react'
+import Layout from '../components/layout'
+
+const NotFoundPage = () => (
+  <Layout>
+    <h1>NOT FOUND</h1>
+    <p>You just hit a route that doesn&#39;t exist... the sadness.</p>
+  </Layout>
+)
+
+export default NotFoundPage

frontend/src/pages/index.tsx

@@ -0,0 +1,55 @@
+import React from 'react'
+import styled from '@emotion/styled'
+
+import Layout from '../components/layout'
+import SEO from '../components/seo'
+
+const Wrapper = styled.div`
+  text-align: center;
+  width: 500px;
+  max-width: 100%;
+  padding: 3em 15px;
+  margin: 0 auto;
+`
+
+const ImageWrapper = styled.div`
+  margin: 3em 0;
+  max-width: 100%;
+`
+
+const LoginButton = styled.a`
+  display: inline-block;
+  background: url(shadow.svg);
+  background-size: 100% 100%;
+  color: white;
+  text-decoration: none;
+  padding: 15px 30px;
+  margin-top: 3em;
+  border-radius: 10px;
+`
+
+const IndexPage = () => {
+  return (
+    <Layout>
+      <SEO />
+      <Wrapper>
+        <ImageWrapper>
+          <img src="/banner.png" />
+        </ImageWrapper>
+        <h1>Streaming alerts for GitHub Sponsors</h1>
+        <p>
+          Trigger real-time <a href="https://streamlabs.com/">streamlabs</a>{' '}
+          subscription alerts when someone sponsors you on{' '}
+          <a href="https://github.com/sponsors">GitHub</a>.
+        </p>
+        <LoginButton
+          href={`https://www.streamlabs.com/api/v1.0/authorize?client_id=${process.env.GATSBY_STREAMLABS_CLIENT_ID}&redirect_uri=${process.env.GATSBY_BASE_API}/oauth/streamlabs&response_type=code&scope=alerts.create`}
+        >
+          Log in with streamlabs
+        </LoginButton>
+      </Wrapper>
+    </Layout>
+  )
+}
+
+export default IndexPage

frontend/src/pages/oauth-redirect.tsx

@@ -0,0 +1,108 @@
+import React, { useState, useEffect } from 'react'
+import { graphql } from 'gatsby'
+import Img from 'gatsby-image'
+import styled from '@emotion/styled'
+
+import Layout from '../components/layout'
+import SEO from '../components/seo'
+
+type User = {
+  id: string
+  username: string
+
+  // alert customization https://dev.streamlabs.com/v1.0/reference#alerts
+  image_href: string
+  sound_href: string
+  message: string
+  user_message: string
+  duration: string
+  special_text_color: string
+}
+
+const Wrapper = styled.div`
+  width: 800px;
+  max-width: 100%;
+  padding: 3em 15px;
+  margin: 0 auto;
+`
+
+const Data = styled.span`
+  display: inline-block;
+  background: rgba(0, 0, 0, 0.1);
+  padding: 3px 8px;
+`
+
+const OauthRedirectPage = ({ location }: { location: Location }) => {
+  const [user, setUser] = useState<User | void>(undefined)
+  const [githubUsername, setGithubUsername] = useState('')
+  const token = location.search.replace('?token=', '')
+
+  useEffect(() => {
+    // load the user
+    fetch(`${process.env.GATSBY_BASE_API}/me`, {
+      headers: { Authorization: `Bearer ${token}` },
+    })
+      .then(res => res.json())
+      .then(res => setUser(res))
+      .catch(console.error.bind(console))
+  }, [])
+
+  if (!user) {
+    return (
+      <Layout>
+        <SEO />
+        <div>Loading...</div>
+      </Layout>
+    )
+  }
+
+  return (
+    <Layout>
+      <SEO />
+      <Wrapper>
+        <h3>Nearly there!</h3>
+        <div>
+          One last step: add a GitHub webhook. Sounds complicated? It's not!
+          Let's walk you through it.
+        </div>
+        <ol>
+          <li>
+            What's your GitHub username?{' '}
+            <input
+              value={githubUsername}
+              onChange={e => setGithubUsername(e.target.value)}
+            />
+          </li>
+          <li>
+            Head over{' '}
+            <a
+              href={`https://github.com/sponsors/${githubUsername}/dashboard/webhooks/new`}
+              target="_blank"
+            >{`https://github.com/sponsors/${githubUsername}/dashboard/webhooks/new`}</a>
+          </li>
+          <li>
+            Fill the form with the following information:
+            <ul>
+              <li>
+                Payload URL:{' '}
+                <Data>{`${process.env.GATSBY_BASE_API}/webhook/github/${user.id}`}</Data>
+              </li>
+              <li>
+                Content Type: <Data>application/json</Data>
+              </li>
+              <li>
+                Secret: <Data>{token}</Data>
+              </li>
+            </ul>
+          </li>
+          <li>
+            Done! When someone sponsors you on GitHub, you will now receive an
+            alert on streamlabs.
+          </li>
+        </ol>
+      </Wrapper>
+    </Layout>
+  )
+}
+
+export default OauthRedirectPage

frontend/static/shadow.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 240 55">
+  <g fill="none" fill-rule="evenodd">
+    <rect x="-10" y="-10" width="260" height="75" fill="#FF2CB1"/>
+    <ellipse cx="12.142" cy="8.066" fill="#FF89D2" rx="9.5" ry="5" transform="rotate(-21 12.142 8.066)"/>
+    <path fill="#E50797" d="M0 49.253c102.356 1.95 167.191 1.95 194.507 0 32.109-2.292 34.672 2.2 39.395-49.259 3.6-39.208 8.136-33.658 13.611 16.65 19.857 46.64 19.857 68.862 0 66.666-19.857-2.196-107.216-8.698-262.078-19.507L0 49.253z"/>
+  </g>
+</svg>

netlify.toml

@@ -0,0 +1,4 @@
+[build]
+	base    = "frontend"
+	publish = "public"
+	command = "npm run build"