Bsky link card service

.github/workflows/build-and-push-ogcard-aws.yaml

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+name: build-and-push-ogcard-aws
+on:
+  push:
+    branches:
+      - divy/bskycard
+
+env:
+  REGISTRY: ${{ secrets.AWS_ECR_REGISTRY_USEAST2_PACKAGES_REGISTRY }}
+  USERNAME: ${{ secrets.AWS_ECR_REGISTRY_USEAST2_PACKAGES_USERNAME }}
+  PASSWORD: ${{ secrets.AWS_ECR_REGISTRY_USEAST2_PACKAGES_PASSWORD }}
+  IMAGE_NAME: bskyogcard
+
+jobs:
+  ogcard-container-aws:
+    if: github.repository == 'bluesky-social/social-app'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ env.USERNAME}}
+          password: ${{ env.PASSWORD }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=sha,enable=true,priority=100,prefix=,suffix=,format=long
+
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          file: ./Dockerfile.bskyogcard
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile.bskyogcard

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+FROM node:20.11-alpine3.18 as build
+
+# Move files into the image and install
+WORKDIR /app
+
+COPY ./bskyogcard/package.json ./
+COPY ./bskyogcard/yarn.lock ./
+RUN yarn install --frozen-lockfile
+
+COPY ./bskyogcard ./
+
+# build then prune dev deps
+RUN yarn build
+RUN yarn install --production --ignore-scripts --prefer-offline
+
+# Uses assets from build stage to reduce build size
+FROM node:20.11-alpine3.18
+
+RUN apk add --update dumb-init
+
+# Avoid zombie processes, handle signal forwarding
+ENTRYPOINT ["dumb-init", "--"]
+
+WORKDIR /app
+COPY --from=build /app /app
+RUN mkdir /app/data && chown node /app/data
+
+VOLUME /app/data
+EXPOSE 3000
+ENV CARD_PORT=3000
+ENV NODE_ENV=production
+# potential perf issues w/ io_uring on this version of node
+ENV UV_USE_IO_URING=0
+
+# https://github.com/nodejs/docker-node/blob/master/docs/BestPractices.md#non-root-user
+USER node
+CMD ["node", "--heapsnapshot-signal=SIGUSR2", "--enable-source-maps", "dist/bin.js"]
+
+LABEL org.opencontainers.image.source=https://github.com/bluesky-social/social-app
+LABEL org.opencontainers.image.description="Bsky Card Service"
+LABEL org.opencontainers.image.licenses=UNLICENSED

bskyogcard/package.json

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+{
+  "name": "bskyogcard",
+  "version": "0.0.0",
+  "type": "module",
+  "main": "src/index.ts",
+  "scripts": {
+    "start": "node --loader ts-node/esm ./src/bin.ts",
+    "build": "tsc && cp -r src/assets dist/assets"
+  },
+  "dependencies": {
+    "@atproto/api": "0.12.19-next.0",
+    "@atproto/common": "^0.4.0",
+    "@resvg/resvg-js": "^2.6.2",
+    "express": "^4.19.2",
+    "http-terminator": "^3.2.0",
+    "pino": "^9.2.0",
+    "react": "^18.3.1",
+    "satori": "^0.10.13"
+  },
+  "devDependencies": {
+    "@types/node": "^20.14.3",
+    "typescript": "^5.4.5"
+  }
+}

bskyogcard/src/bin.ts

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+import cluster, {Worker} from 'node:cluster'
+
+import {envInt} from '@atproto/common'
+
+import {CardService, envToCfg, httpLogger, readEnv} from './index.js'
+
+async function main() {
+  const env = readEnv()
+  const cfg = envToCfg(env)
+  const card = await CardService.create(cfg)
+  await card.start()
+  httpLogger.info('card service is running')
+  process.on('SIGTERM', async () => {
+    httpLogger.info('card service is stopping')
+    await card.destroy()
+    httpLogger.info('card service is stopped')
+    if (cluster.isWorker) process.exit(0)
+  })
+}
+
+const workerCount = envInt('CARD_CLUSTER_WORKER_COUNT')
+
+if (workerCount) {
+  if (cluster.isPrimary) {
+    httpLogger.info(`primary ${process.pid} is running`)
+    const workers = new Set<Worker>()
+    for (let i = 0; i < workerCount; ++i) {
+      workers.add(cluster.fork())
+    }
+    let teardown = false
+    cluster.on('exit', worker => {
+      workers.delete(worker)
+      if (!teardown) {
+        workers.add(cluster.fork()) // restart on crash
+      }
+    })
+    process.on('SIGTERM', () => {
+      teardown = true
+      httpLogger.info('disconnecting workers')
+      workers.forEach(w => w.kill('SIGTERM'))
+    })
+  } else {
+    httpLogger.info(`worker ${process.pid} is running`)
+    main()
+  }
+} else {
+  main() // non-clustering
+}

bskyogcard/src/components/Butterfly.tsx

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+import React from 'react'
+
+export function Butterfly(props: React.SVGAttributes<SVGSVGElement>) {
+  return (
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      fill="none"
+      viewBox="0 0 568 501"
+      {...props}>
+      <path
+        fill="currentColor"
+        d="M123.121 33.664C188.241 82.553 258.281 181.68 284 234.873c25.719-53.192 95.759-152.32 160.879-201.21C491.866-1.611 568-28.906 568 57.947c0 17.346-9.945 145.713-15.778 166.555-20.275 72.453-94.155 90.933-159.875 79.748C507.222 323.8 536.444 388.56 473.333 453.32c-119.86 122.992-172.272-30.859-185.702-70.281-2.462-7.227-3.614-10.608-3.631-7.733-.017-2.875-1.169.506-3.631 7.733-13.43 39.422-65.842 193.273-185.702 70.281-63.111-64.76-33.89-129.52 80.986-149.071-65.72 11.185-139.6-7.295-159.875-79.748C9.945 203.659 0 75.291 0 57.946 0-28.906 76.135-1.612 123.121 33.664Z"
+      />
+    </svg>
+  )
+}

bskyogcard/src/components/Img.tsx

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+import React from 'react'
+
+export function Img(
+  props: Omit<React.ImgHTMLAttributes<HTMLImageElement>, 'src'> & {src: Buffer},
+) {
+  const {src, ...others} = props
+  return (
+    <img {...others} src={`data:image/jpeg;base64,${src.toString('base64')}`} />
+  )
+}

bskyogcard/src/components/StarterPack.tsx

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+/* eslint-disable bsky-internal/avoid-unwrapped-text */
+import React from 'react'
+import {AppBskyGraphDefs, AppBskyGraphStarterpack} from '@atproto/api'
+
+import {Butterfly} from './Butterfly.js'
+import {Img} from './Img.js'
+
+export const STARTERPACK_HEIGHT = 630
+export const STARTERPACK_WIDTH = 1200
+export const TILE_SIZE = STARTERPACK_HEIGHT / 3
+
+const GRADIENT_TOP = '#0A7AFF'
+const GRADIENT_BOTTOM = '#59B9FF'
+const IMAGE_STROKE = '#359CFF'
+
+export function StarterPack(props: {
+  starterPack: AppBskyGraphDefs.StarterPackView
+  images: Map<string, Buffer>
+}) {
+  const {starterPack, images} = props
+  const record = AppBskyGraphStarterpack.isRecord(starterPack.record)
+    ? starterPack.record
+    : null
+  const imagesArray = [...images.values()]
+  const imageOfCreator = images.get(starterPack.creator.did)
+  const imagesExceptCreator = [...images.entries()]
+    .filter(([did]) => did !== starterPack.creator.did)
+    .map(([, image]) => image)
+  const imagesAcross: Buffer[] = []
+  if (imageOfCreator) {
+    if (imagesExceptCreator.length >= 6) {
+      imagesAcross.push(...imagesExceptCreator.slice(0, 3))
+      imagesAcross.push(imageOfCreator)
+      imagesAcross.push(...imagesExceptCreator.slice(3, 6))
+    } else {
+      const firstHalf = Math.floor(imagesExceptCreator.length / 2)
+      imagesAcross.push(...imagesExceptCreator.slice(0, firstHalf))
+      imagesAcross.push(imageOfCreator)
+      imagesAcross.push(
+        ...imagesExceptCreator.slice(firstHalf, imagesExceptCreator.length),
+      )
+    }
+  } else {
+    imagesAcross.push(...imagesExceptCreator.slice(0, 7))
+  }
+  return (
+    <div
+      style={{
+        display: 'flex',
+        justifyContent: 'center',
+        width: STARTERPACK_WIDTH,
+        height: STARTERPACK_HEIGHT,
+        backgroundColor: 'black',
+        color: 'white',
+        fontFamily: 'Inter',
+      }}>
+      {/* image tiles */}
+      <div
+        style={{
+          display: 'flex',
+          flexWrap: 'wrap',
+          alignItems: 'stretch',
+          width: TILE_SIZE * 6,
+          height: TILE_SIZE * 3,
+        }}>
+        {[...Array(18)].map((_, i) => {
+          const image = imagesArray.at(i % imagesArray.length)
+          return (
+            <div
+              key={i}
+              style={{
+                display: 'flex',
+                height: TILE_SIZE,
+                width: TILE_SIZE,
+              }}>
+              {image && <Img height="100%" width="100%" src={image} />}
+            </div>
+          )
+        })}
+        {/* background overlay */}
+        <div
+          style={{
+            display: 'flex',
+            width: '100%',
+            height: '100%',
+            position: 'absolute',
+            backgroundImage: `linear-gradient(to bottom, ${GRADIENT_TOP}, ${GRADIENT_BOTTOM})`,
+            opacity: 0.9,
+          }}
+        />
+      </div>
+      {/* foreground text & images */}
+      <div
+        style={{
+          display: 'flex',
+          alignItems: 'center',
+          flexDirection: 'column',
+          width: '100%',
+          height: '100%',
+          position: 'absolute',
+          color: 'white',
+        }}>
+        <div
+          style={{
+            color: 'white',
+            padding: 60,
+            fontSize: 40,
+          }}>
+          JOIN THE CONVERSATION
+        </div>
+        <div style={{display: 'flex'}}>
+          {imagesAcross.map((image, i) => {
+            return (
+              <div
+                key={i}
+                style={{
+                  display: 'flex',
+                  height: 172 + 15 * 2,
+                  width: 172 + 15 * 2,
+                  margin: -15,
+                  border: `15px solid ${IMAGE_STROKE}`,
+                  borderRadius: '50%',
+                  overflow: 'hidden',
+                }}>
+                <Img height="100%" width="100%" src={image} />
+              </div>
+            )
+          })}
+        </div>
+        <div
+          style={{
+            padding: '75px 30px 0px',
+            fontSize: 65,
+          }}>
+          {record?.name || 'Starter Pack'}
+        </div>
+        <div
+          style={{
+            display: 'flex',
+            fontSize: 40,
+            justifyContent: 'center',
+            padding: '30px 30px 10px',
+          }}>
+          on <Butterfly width="65" style={{margin: '-7px 10px 0'}} /> Bluesky
+        </div>
+      </div>
+    </div>
+  )
+}

bskyogcard/src/config.ts

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+import {envInt, envStr} from '@atproto/common'
+
+export type Config = {
+  service: ServiceConfig
+}
+
+export type ServiceConfig = {
+  port: number
+  version?: string
+  appviewUrl: string
+  originVerify?: string
+}
+
+export type Environment = {
+  port?: number
+  version?: string
+  appviewUrl?: string
+  originVerify?: string
+}
+
+export const readEnv = (): Environment => {
+  return {
+    port: envInt('CARD_PORT'),
+    version: envStr('CARD_VERSION'),
+    appviewUrl: envStr('CARD_APPVIEW_URL'),
+    originVerify: envStr('CARD_ORIGIN_VERIFY'),
+  }
+}
+
+export const envToCfg = (env: Environment): Config => {
+  const serviceCfg: ServiceConfig = {
+    port: env.port ?? 3000,
+    version: env.version,
+    appviewUrl: env.appviewUrl ?? 'https://api.bsky.app',
+    originVerify: env.originVerify,
+  }
+  return {
+    service: serviceCfg,
+  }
+}