support flash

vite.config.ts

@@ -2,12 +2,56 @@ import { defineConfig } from 'vitest/config'
 import { svelte } from '@sveltejs/vite-plugin-svelte'
 import { svelteTesting } from '@testing-library/svelte/vite'
 import { fileURLToPath, URL } from 'node:url'
+import { readFileSync, readdirSync } from 'node:fs'
+import type { Plugin } from 'vite'
+
+const RUFFLE_DIRECTORY = fileURLToPath(
+  new URL('./node_modules/@ruffle-rs/ruffle/', import.meta.url),
+)
+const RUFFLE_ASSET_PATTERN = /^(?:ruffle\.js|core\.ruffle\..+\.js|.+\.wasm|LICENSE_(?:MIT|APACHE))$/
+
+/** Serve and emit the pinned self-hosted runtime without a third-party CDN. */
+function ruffleAssets(): Plugin {
+  const files = readdirSync(RUFFLE_DIRECTORY).filter((name) => RUFFLE_ASSET_PATTERN.test(name))
+  let building = false
+
+  return {
+    name: 'plspace-ruffle-assets',
+    configResolved(config) {
+      building = config.command === 'build'
+    },
+    buildStart() {
+      if (!building) return
+      for (const name of files) {
+        this.emitFile({
+          type: 'asset',
+          fileName: `ruffle/${name}`,
+          source: readFileSync(`${RUFFLE_DIRECTORY}/${name}`),
+        })
+      }
+    },
+    configureServer(server) {
+      server.middlewares.use('/ruffle', (request, response, next) => {
+        const name = decodeURIComponent((request.url ?? '').replace(/^\//, '').split('?')[0])
+        if (!files.includes(name)) {
+          next()
+          return
+        }
+        response.setHeader(
+          'Content-Type',
+          name.endsWith('.wasm') ? 'application/wasm' : name.endsWith('.js') ? 'text/javascript' : 'text/plain',
+        )
+        response.end(readFileSync(`${RUFFLE_DIRECTORY}/${name}`))
+      })
+    },
+  }
+}
 
 // Fully static output: the app talks to a Mastodon/Pleroma server directly from
 // the browser, so `dist/` can be dropped on any static host (or file://-ish CDN).
 export default defineConfig({
   base: './',
-  plugins: [svelte(), svelteTesting()],
+  plugins: [svelte(), svelteTesting(), ruffleAssets()],
   resolve: {
     alias: {
       $lib: fileURLToPath(new URL('./src/lib', import.meta.url)),