feat: add experimental subscription support via PubSub (#51)

examples/nodejs-subscriptions/.dockerignore

@@ -0,0 +1,15 @@
+node_modules
+Dockerfile*
+docker-compose*
+.dockerignore
+.git
+.gitignore
+README.md
+LICENSE
+.vscode
+Makefile
+helm-charts
+.env
+.editorconfig
+.idea
+coverage*

examples/nodejs-subscriptions/.gitignore

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+# Logs
+
+logs
+_.log
+npm-debug.log_
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# Runtime data
+
+pids
+_.pid
+_.seed
+\*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+
+lib-cov
+
+# Coverage directory used by tools like istanbul
+
+coverage
+\*.lcov
+
+# nyc test coverage
+
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+
+bower_components
+
+# node-waf configuration
+
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+
+build/Release
+
+# Dependency directories
+
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+
+web_modules/
+
+# TypeScript cache
+
+\*.tsbuildinfo
+
+# Optional npm cache directory
+
+.npm
+
+# Optional eslint cache
+
+.eslintcache
+
+# Optional stylelint cache
+
+.stylelintcache
+
+# Microbundle cache
+
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+
+.node_repl_history
+
+# Output of 'npm pack'
+
+\*.tgz
+
+# Yarn Integrity file
+
+.yarn-integrity
+
+# dotenv environment variable files
+
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+
+.cache
+.parcel-cache
+
+# Next.js build output
+
+.next
+out
+
+# Nuxt.js build / generate output
+
+.nuxt
+dist
+
+# Gatsby files
+
+.cache/
+
+# Comment in the public line in if your project uses Gatsby and not Next.js
+
+# https://nextjs.org/blog/next-9-1#public-directory-support
+
+# public
+
+# vuepress build output
+
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+
+.temp
+.cache
+
+# Docusaurus cache and generated files
+
+.docusaurus
+
+# Serverless directories
+
+.serverless/
+
+# FuseBox cache
+
+.fusebox/
+
+# DynamoDB Local files
+
+.dynamodb/
+
+# TernJS port file
+
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+
+.vscode-test
+
+# yarn v2
+
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.\*
+
+# wrangler project
+
+.dev.vars
+.wrangler/
+
+# Pylon project
+.pylon

examples/nodejs-subscriptions/Dockerfile

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+# Use the official Node.js 20 image as the base
+FROM node:20-alpine as base
+
+LABEL description="Offical docker image for Pylon services (Node.js)"
+LABEL org.opencontainers.image.source="https://github.com/getcronit/pylon"
+LABEL maintainer="office@cronit.io"
+
+WORKDIR /usr/src/pylon
+
+# install dependencies into a temp directory
+# this will cache them and speed up future builds
+FROM base AS install
+RUN mkdir -p /temp/dev
+COPY package.json package-lock.json /temp/dev/
+RUN cd /temp/dev && npm ci
+
+# install with --production (exclude devDependencies)
+RUN mkdir -p /temp/prod
+COPY package.json package-lock.json /temp/prod/
+RUN cd /temp/prod && npm ci --only=production
+
+# copy node_modules from temp directory
+# then copy all (non-ignored) project files into the image
+FROM install AS prerelease
+COPY --from=install /temp/dev/node_modules node_modules
+COPY . .
+
+# [optional] tests & build
+ENV NODE_ENV=production
+
+# Create .pylon folder (mkdir)
+RUN mkdir -p .pylon
+# RUN npm test
+RUN npm run pylon build
+
+# copy production dependencies and source code into final image
+FROM base AS release
+COPY --from=install /temp/prod/node_modules node_modules
+COPY --from=prerelease /usr/src/pylon/.pylon .pylon
+COPY --from=prerelease /usr/src/pylon/package.json .
+
+# run the app
+USER node
+EXPOSE 3000/tcp
+ENTRYPOINT [ "node", "/usr/src/pylon/.pylon/index.js" ]

examples/nodejs-subscriptions/package.json

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+{
+  "name": "nodejs-subscriptions",
+  "private": true,
+  "version": "0.0.1",
+  "type": "module",
+  "description": "Generated with `npm create pylon`",
+  "scripts": {
+    "dev": "pylon dev -c \"node --enable-source-maps .pylon/index.js\"",
+    "build": "pylon build"
+  },
+  "dependencies": {
+    "@getcronit/pylon": "^2.0.0",
+    "@hono/node-server": "^1.12.2"
+  },
+  "devDependencies": {
+    "@getcronit/pylon-dev": "^1.0.0"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/getcronit/pylon.git"
+  },
+  "homepage": "https://pylon.cronit.io"
+}

examples/nodejs-subscriptions/pylon.d.ts

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+import '@getcronit/pylon'
+
+declare module '@getcronit/pylon' {
+  interface Bindings {}
+
+  interface Variables {}
+}

examples/nodejs-subscriptions/src/index.ts

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+import {app, experimentalCreatePubSub, ID} from '@getcronit/pylon'
+import {serve} from '@hono/node-server'
+import {randomUUID} from 'crypto'
+
+enum Events {
+  postCreated = 'postCreated'
+}
+
+const pubSub = experimentalCreatePubSub<{
+  [Events.postCreated]: [post: Post]
+}>()
+
+class Post {
+  static create = (title: string, content: string) => {
+    const post = new Post(randomUUID(), title, content)
+    posts.push(post)
+    pubSub.publish(Events.postCreated, post)
+    return post
+  }
+
+  constructor(public id: ID, public title: string, public content: string) {}
+}
+
+const posts = [
+  new Post(randomUUID(), 'Hello, world!', 'This is the first post'),
+  new Post(randomUUID(), 'Hello, world!', 'This is the second post')
+]
+
+export const graphql = {
+  Query: {
+    posts
+  },
+  Mutation: {
+    createPost: Post.create
+  },
+  Subscription: {
+    postCreated: () => pubSub.subscribe(Events.postCreated)
+  }
+}
+
+serve(app, info => {
+  console.log(`Server running at ${info.port}`)
+})

examples/nodejs-subscriptions/tsconfig.json

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+{
+  "extends": "@getcronit/pylon/tsconfig.pylon.json",
+  "include": ["pylon.d.ts", "src/**/*.ts"]
+}

packages/pylon-builder/src/schema/builder.ts

@@ -114,19 +114,27 @@ export class SchemaBuilder {
 
     const queryProperty = sfiType.getProperty('Query')
     const mutationProperty = sfiType.getProperty('Mutation')
+    const subscriptionProperty = sfiType.getProperty('Subscription')
 
     const queryType = queryProperty
       ? this.checker.getTypeOfSymbolAtLocation(queryProperty, this.sfiFile)
       : undefined
     const mutationType = mutationProperty
       ? this.checker.getTypeOfSymbolAtLocation(mutationProperty, this.sfiFile)
       : undefined
+    const subscriptionType = subscriptionProperty
+      ? this.checker.getTypeOfSymbolAtLocation(
+          subscriptionProperty,
+          this.sfiFile
+        )
+      : undefined
 
     const parser = new SchemaParser(this.checker, this.sfiFile, this.program)
 
     parser.parse({
       Query: queryType,
-      Mutation: mutationType
+      Mutation: mutationType,
+      Subscription: subscriptionType
     })
 
     return {