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feat(FN-4782): complete Step 3 — inject view chunk preload

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Fusion-Task-Id: FN-4782
Fusion-Task-Lineage: 5d6b5632-a135-4d25-9382-57fa23e22484
This commit is contained in:
Fusion (runfusion.ai)
2026-05-17 01:45:12 -07:00
committed by gsxdsm
parent 6bb70dc805
commit aa105c9b80
2 changed files with 175 additions and 2 deletions
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54
packages/dashboard/src/server.ts
View File

@@ -72,6 +72,7 @@ import {
tasksBouncedToInProgressPerDay,
tasksEnteredInReviewPerDay,
} from "./reliability-metrics.js";
import { loadViewChunkManifest } from "./view-chunk-manifest.js";
const __dirname = dirname(fileURLToPath(import.meta.url));
@@ -656,6 +657,52 @@ export function createServer(store: TaskStore, options?: ServerOptions): ReturnT
? join(__dirname, "..", "dist", "client")
: join(__dirname, "..", "client");
let cachedIndexClientDir: string | null = null;
let cachedIndexHtml: string | null = null;
let cachedTemplatedIndexHtml: string | null = null;
const buildViewPreloadInjection = (chunkMap: Record<string, string>): string => {
const serializedChunkMap = JSON.stringify(chunkMap).replace(/<\//g, "<\\/");
return `<script>window.__FUSION_VIEW_CHUNKS__=${serializedChunkMap};(()=>{try{const chunkMap=window.__FUSION_VIEW_CHUNKS__||{};const projectId=localStorage.getItem("kb-dashboard-current-project");const scopedKey=projectId?"kb:"+projectId+":kb-dashboard-task-view":null;let taskView=(scopedKey&&localStorage.getItem(scopedKey))||localStorage.getItem("kb-dashboard-task-view");if(taskView==="devserver")taskView="dev-server";if(taskView==="roadmaps")taskView="board";if(typeof taskView!=="string"||taskView.startsWith("plugin:"))return;const chunkPath=chunkMap[taskView];if(!chunkPath)return;const link=document.createElement("link");link.rel="modulepreload";link.href=chunkPath;link.crossOrigin="";document.head.appendChild(link);}catch{}})();</script>`;
};
const renderIndexHtml = (): string => {
const resolvedClientDir = process.env.FUSION_CLIENT_DIR
? process.env.FUSION_CLIENT_DIR
: clientDir;
if (cachedTemplatedIndexHtml && cachedIndexClientDir === resolvedClientDir) {
return cachedTemplatedIndexHtml;
}
const indexPath = join(resolvedClientDir, "index.html");
if (!cachedIndexHtml || cachedIndexClientDir !== resolvedClientDir) {
cachedIndexHtml = readFileSync(indexPath, "utf8");
cachedIndexClientDir = resolvedClientDir;
}
const chunkMap = loadViewChunkManifest(resolvedClientDir);
const injection = buildViewPreloadInjection(chunkMap);
const marker = "<!-- fusion:view-preload -->";
const withInjectedHead = cachedIndexHtml.includes(marker)
? cachedIndexHtml.replace(marker, `${marker}\n${injection}`)
: cachedIndexHtml.replace("</head>", `${injection}</head>`);
cachedTemplatedIndexHtml = withInjectedHead;
return withInjectedHead;
};
const serveIndexHtml = (_req: express.Request, res: express.Response): void => {
try {
const html = renderIndexHtml();
res.setHeader("Content-Type", "text/html; charset=utf-8");
res.setHeader("Cache-Control", "no-store, max-age=0");
res.status(200).send(html);
} catch {
res.status(404).end();
}
};
if (!isHeadless) {
app.get("/version.json", (_req, res) => {
res.setHeader("Cache-Control", "no-store, max-age=0");
@@ -665,7 +712,10 @@ export function createServer(store: TaskStore, options?: ServerOptions): ReturnT
}
});
});
app.use(express.static(clientDir));
if (existsSync(join(clientDir, "index.html"))) {
app.get(["/", "/index.html"], serveIndexHtml);
app.use(express.static(clientDir, { index: false }));
}
}
// Create ChatStore for chat session management (available for SSE event forwarding)
@@ -1400,7 +1450,7 @@ export function createServer(store: TaskStore, options?: ServerOptions): ReturnT
res.status(404).end();
return;
}
res.sendFile(join(clientDir, "index.html"));
serveIndexHtml(req, res);
});
}