Julien-R44 · Julien-R44 · Apr 9, 2024 · Apr 9, 2024 · Apr 9, 2024 · Apr 9, 2024
diff --git a/examples/fastify/bin/start.ts b/examples/fastify/bin/start.ts
@@ -1,4 +1,8 @@
 import { hot } from 'hot-hook'
 
-await hot.init({ root: import.meta.filename })
+await hot.init({
+  root: import.meta.filename,
+  boundaries: ['../src/services/**.ts'],
+})
+
 await import('../src/index.js')
diff --git a/examples/fastify/package.json b/examples/fastify/package.json
@@ -8,6 +8,7 @@
     "@hot-hook/runner": "workspace:*",
     "@types/node": "^20.11.17",
     "hot-hook": "workspace:*",
+    "@hot-hook/dump-viewer": "workspace:*",
     "pino-pretty": "^11.0.0",
     "tsx": "^3.12.2"
   },

diff --git a/examples/fastify/src/helpers/posts.ts b/examples/fastify/src/helpers/posts.ts
@@ -0,0 +1,6 @@
+export function uppercasePostTitles(posts: any[]) {
+  return posts.map((post) => ({
+    ...post,
+    title: post.title.toUpperCase(),
+  }))
+}
diff --git a/examples/fastify/src/index.ts b/examples/fastify/src/index.ts
@@ -10,10 +10,21 @@ const fastify = Fastify({
 })
 
 fastify.get('/', async (request, reply) => {
-  const { PostsService } = await import('./posts_service.js')
+  const { PostsService } = await import('./services/posts_service.js', { with: { hot: 'true' } })
   return new PostsService().getPosts()
 })
 
+/**
+ * This route is totally optional and can be used to visualize
+ * your dependency graph in a browser.
+ */
+fastify.get('/dump-viewer', async (request, reply) => {
+  const { dumpViewer } = await import('@hot-hook/dump-viewer')
+
+  reply.header('Content-Type', 'text/html; charset=utf-8')
+  return dumpViewer()
+})
+
 const start = async () => {
   try {
     await fastify.listen({ port: 3000 })

diff --git a/examples/fastify/src/posts_service.ts → ...les/fastify/src/services/posts_service.ts b/examples/fastify/src/posts_service.ts → ...les/fastify/src/services/posts_service.ts
@@ -1,14 +1,16 @@
+import { uppercasePostTitles } from '../helpers/posts'
+
 export class PostsService {
   /**
    * Try updating the return value of this method and refreshing the page.
    * You will always get the latest version of the code without
    * restarting the whole server.
    */
   getPosts() {
-    return [
-      { id: 1, title: 'Post 1' },
-      { id: 2, title: 'Post 2' },
-      { id: 3, title: 'Post 3' },
-    ]
+    return uppercasePostTitles([
+      { id: 1, title: 'post 1' },
+      { id: 2, title: 'post 2' },
+      { id: 3, title: 'post 3' },
+    ])
   }
 }
diff --git a/packages/dump_viewer/index.html b/packages/dump_viewer/index.html
@@ -0,0 +1,16 @@
+<!doctype html>
+<html lang="en" class="h-full">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Hot Hook - Dump Viewer</title>
+    <script>
+      window.__HOT_HOOK_DUMP__ = $__hot_hook_placeholder__
+    </script>
+  </head>
+  <body class="h-full m-0">
+    <div class="h-full" id="app"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
diff --git a/packages/dump_viewer/package.json b/packages/dump_viewer/package.json
@@ -0,0 +1,40 @@
+{
+  "name": "@hot-hook/dump-viewer",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "files": [
+    "build"
+  ],
+  "exports": {
+    ".": "./build/dump_viewer.js"
+  },
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build && tsc -p tsconfig.node.json",
+    "preview": "vite preview",
+    "typecheck": "tsc --noEmit",
+    "lint": "eslint ."
+  },
+  "devDependencies": {
+    "@preact/preset-vite": "^2.8.2",
+    "hot-hook": "workspace:*",
+    "typescript": "^5.2.2",
+    "unocss": "^0.59.0",
+    "vite": "^5.2.0",
+    "vite-plugin-singlefile": "^2.0.1"
+  },
+  "dependencies": {
+    "@unocss/reset": "^0.59.0",
+    "preact": "^10.19.6",
+    "vis-data": "^7.1.9",
+    "vis-network": "^9.1.9"
+  },
+  "peerDependencies": {
+    "hot-hook": "workspace:*"
+  },
+  "eslintConfig": {
+    "extends": "@adonisjs/eslint-config/package"
+  },
+  "prettier": "@adonisjs/prettier-config"
+}
diff --git a/packages/dump_viewer/public/vite.svg b/packages/dump_viewer/public/vite.svg
diff --git a/packages/dump_viewer/src/app.tsx b/packages/dump_viewer/src/app.tsx
@@ -0,0 +1,111 @@
+import { DataSet } from 'vis-data'
+import { useEffect } from 'preact/hooks'
+import { Edge, Network, Node } from 'vis-network'
+
+export function App() {
+  async function initGraph() {
+    const data: HotHookDump = import.meta.env.DEV
+      ? // eslint-disable-next-line unicorn/no-await-expression-member
+        (await import('./fixtures/dump.json')).default
+      : window.__HOT_HOOK_DUMP__
+    let nodes: Node[] = []
+    let edges: Edge[] = []
+
+    const paths = new Map()
+
+    data.forEach((item, index) => paths.set(item.path, index + 1))
+    data.forEach((item, index) => {
+      const hasOnlyNodeModulesDependency = item.dependencies.every((dep) =>
+        dep.includes('node_modules')
+      )
+
+      const isRoot = item.dependents.length === 0
+
+      const id = index + 1
+
+      if (item.path.includes('node_modules') && hasOnlyNodeModulesDependency) {
+        return
+      }
+
+      let color = 'lightgray'
+      if (item.boundary) {
+        color = '#fea800'
+      } else if (isRoot) {
+        color = 'violet'
+      } else if (item.reloadable) {
+        color = '#72cc0a'
+      }
+
+      nodes.push({
+        shape: 'box',
+        id: id,
+        label: item.path,
+        margin: { top: 13, bottom: 13, left: 13, right: 13 },
+        borderWidth: 3,
+        shadow: true,
+        font: { color: 'black' },
+        shapeProperties: { borderRadius: 10 },
+        color: color,
+      })
+
+      item.dependencies.forEach((dep) => {
+        const toId = paths.get(dep)
+        if (toId) {
+          edges.push({ from: id, to: toId, arrows: 'to' })
+        } else {
+          console.log('Missing node for dependency', dep)
+        }
+      })
+    })
+
+    const nodesDataSet = new DataSet(nodes)
+    const edgesDataSet = new DataSet(edges)
+    const dataVis = { nodes: nodesDataSet, edges: edgesDataSet }
+
+    const container = document.getElementById('network')!
+    new Network(container, dataVis, {
+      interaction: { hover: true },
+      layout: {},
+      physics: {
+        enabled: true,
+        barnesHut: {
+          gravitationalConstant: -8000,
+          centralGravity: 0.3,
+          springLength: 95,
+          springConstant: 0.04,
+          damping: 0.09,
+          avoidOverlap: 0,
+        },
+      },
+    })
+  }
+
+  useEffect(() => {
+    initGraph()
+  }, [])
+
+  return (
+    <>
+      <div class="z-1 absolute top-0 left-0 border-2 border-[#353535] px-4 pb-3 pt-2 bg-[#3f3f3f] m-4 rounded-lg text-sm">
+        <p class="font-bold text-lg">Legend</p>
+        <div class="flex items-center mt-2">
+          <div class="w-4 h-4 bg-violet mr-2"></div>
+          <span>Root entrypoint</span>
+        </div>
+        <div class="flex items-center">
+          <div class="w-4 h-4 bg-[#fea800] mr-2"></div>
+          <span>Boundary file</span>
+        </div>
+        <div class="flex items-center">
+          <div class="w-4 h-4 bg-[#72cc0a] mr-2"></div>
+          <span>Reloadable</span>
+        </div>
+        <div class="flex items-center">
+          <div class="w-4 h-4 bg-[#D3D3D3] mr-2"></div>
+          <span>Not-reloadable</span>
+        </div>
+      </div>
+      <div id="network" class="h-full" />
+    </>
+  )
+}
diff --git a/packages/dump_viewer/src/dump_viewer.ts b/packages/dump_viewer/src/dump_viewer.ts
@@ -0,0 +1,22 @@
+import { join } from 'node:path'
+import { readFile } from 'node:fs/promises'
+
+/**
+ * Returns the HTML content of the Hot Hook Dump Viewer
+ */
+export async function dumpViewer() {
+  /**
+   * Dump the dependency tree
+   */
+  const { hot } = await import('hot-hook')
+  const dump = await hot.dump()
+
+  /**
+   * Load the HTML content and replace the placeholder with the dump
+   */
+  const htmlLocation = join(import.meta.dirname, 'index.html')
+  let html = await readFile(htmlLocation, 'utf8')
+  html = html.replace('$__hot_hook_placeholder__', JSON.stringify(dump))
+
+  return html
+}
diff --git a/packages/dump_viewer/src/env.d.ts b/packages/dump_viewer/src/env.d.ts
@@ -0,0 +1,5 @@
+type HotHookDump = typeof import('./fixtures/dump.json')
+
+interface Window {
+  __HOT_HOOK_DUMP__: HokHookDump
+}
diff --git a/packages/dump_viewer/src/fixtures/dump.json b/packages/dump_viewer/src/fixtures/dump.json
diff --git a/packages/dump_viewer/src/index.css b/packages/dump_viewer/src/index.css
@@ -0,0 +1,14 @@
+:root {
+  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
diff --git a/packages/dump_viewer/src/main.tsx b/packages/dump_viewer/src/main.tsx
@@ -0,0 +1,7 @@
+import { render } from 'preact'
+import { App } from './app.tsx'
+import '@unocss/reset/tailwind-compat.css'
+import 'virtual:uno.css'
+import './index.css'
+
+render(<App />, document.getElementById('app')!)
diff --git a/packages/dump_viewer/tsconfig.json b/packages/dump_viewer/tsconfig.json
@@ -0,0 +1,30 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "module": "ESNext",
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
+    "skipLibCheck": true,
+    "paths": {
+      "react": ["./node_modules/preact/compat/"],
+      "react-dom": ["./node_modules/preact/compat/"]
+    },
+    "types": ["vite/client"],
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "jsxImportSource": "preact",
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src"]
+}
diff --git a/packages/dump_viewer/tsconfig.node.json b/packages/dump_viewer/tsconfig.node.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "skipLibCheck": true,
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "outDir": "./build",
+    "allowSyntheticDefaultImports": true,
+    "strict": true
+  },
+  "include": ["./src/dump_viewer.ts"]
+}
diff --git a/packages/dump_viewer/vite.config.ts b/packages/dump_viewer/vite.config.ts
@@ -0,0 +1,10 @@
+import { defineConfig } from 'vite'
+import preact from '@preact/preset-vite'
+import unocss from 'unocss/vite'
+import { viteSingleFile } from 'vite-plugin-singlefile'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [preact(), unocss(), viteSingleFile()],
+  build: { outDir: 'build', emptyOutDir: true },
+})
diff --git a/packages/hot_hook/src/dependency_tree.ts b/packages/hot_hook/src/dependency_tree.ts
@@ -1,3 +1,5 @@
+import { dirname, relative } from 'node:path'
+
 /**
  * Represent a file node in the dependency tree.
  */
@@ -179,4 +181,18 @@ export default class DependencyTree {
     const result = checkPathToRoot(node)
     return result
   }
+
+  dump() {
+    const rootDirname = dirname(this.#tree.path)
+    const isNodeModule = (path: string) => path.includes('node_modules')
+
+    return Array.from(this.#pathMap.values()).map((node) => ({
+      path: relative(rootDirname, node.path),
+      boundary: node.reloadable,
+      reloadable: isNodeModule(node.path) ? false : this.isReloadable(node.path),
+      version: node.version,
+      dependencies: Array.from(node.dependencies).map((n) => relative(rootDirname, n.path)),
+      dependents: Array.from(node.dependents).map((n) => relative(rootDirname, n.path)),
+    }))
+  }
 }