66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
import ContextCache from "./ContextCache.js";
|
|
import path from "path";
|
|
|
|
function formatTimeSinceInSeconds(start) {
|
|
return Math.ceil((performance.now() - start) / 100) / 10;
|
|
}
|
|
|
|
function serveResult (result, fileName, res, next) {
|
|
let bundle, error;
|
|
try {
|
|
for (const out of result.outputFiles) {
|
|
if (path.basename(out.path) === fileName) {
|
|
bundle = out.text;
|
|
}
|
|
}
|
|
} catch(e) {
|
|
error = e;
|
|
}
|
|
|
|
if (!bundle) {
|
|
next(new Error(`Failed to generate bundle: ${fileName}`, {
|
|
cause: error
|
|
}));
|
|
return;
|
|
}
|
|
|
|
res.append("Cache-Control", "max-age=0");
|
|
res.append("Content-Type", "application/javascript");
|
|
res.send(bundle);
|
|
};
|
|
|
|
function createRoute(app, name, route, context, dependantCaches) {
|
|
const cache = new ContextCache(context);
|
|
app.get(route, async function (req, res, next) {
|
|
// Multiple files may be requested at this path, calling this function in quick succession.
|
|
// Await the previous build before re-building again.
|
|
await cache.promise;
|
|
|
|
if (!cache.isBuilt()) {
|
|
try {
|
|
const start = performance.now();
|
|
if (dependantCaches) {
|
|
await Promise.all(
|
|
dependantCaches.map((dependantCache) => {
|
|
if (!dependantCache.isBuilt()) {
|
|
return dependantCache.rebuild();
|
|
}
|
|
})
|
|
);
|
|
}
|
|
await cache.rebuild();
|
|
console.log(
|
|
`Built ${name} in ${formatTimeSinceInSeconds(start)} seconds.`
|
|
);
|
|
} catch (e) {
|
|
next(e);
|
|
}
|
|
}
|
|
|
|
return serveResult(cache.result, path.basename(req.originalUrl), res, next);
|
|
});
|
|
|
|
return cache;
|
|
}
|
|
|
|
export default createRoute; |