mirror of
https://github.com/MBombeck/HealthLog.git
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Marc-André Bombeck
9f2a3e25fe
The dynamic /i18n/[locale] route handler answered with Next's default Cache-Control (private, max-age=0, must-revalidate) and no validator — its immutable-cache header was overridden, so a non-PWA browser would re-download the full catalog on every hard load. Static public/ files keep an ETag (repeat loads revalidate to a 304) and the service worker's cache-first rule covers the offline relaunch; the ?v= build key the layout appends busts both per deploy. scripts/generate-i18n-boot.mjs writes public/i18n/<locale>.js for all six locales as a prebuild/predev step (the sw-version.js pattern); output is gitignored. The route handler is removed. Measured on a production build, authenticated DE session: dashboard document 522 KB raw / 139 KB gz -> 170 KB raw / 24.6 KB gz; the DE catalog moves into a one-time 119 KB gz cached asset. H2
53 lines
2.0 KiB
JavaScript
53 lines
2.0 KiB
JavaScript
#!/usr/bin/env node
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/**
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* Generate the locale-catalog boot scripts (`public/i18n/<locale>.js`).
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*
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* The root layout emits `<script src="/i18n/<locale>.js?v=<version>" defer>`
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* ahead of Next's hydration scripts; the body assigns the active locale's
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* full message bundle to `self.__HL_I18N`, which `src/lib/i18n/load-locale.ts`
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* reads in its browser cache initializer. This replaces the former RSC-prop
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* handoff that serialized the ENTIRE active catalog into every document's
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* flight payload (392 KB of a 505 KB dashboard HTML, re-downloaded on every
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* hard load).
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*
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* Static `public/` files (rather than a route handler) because Next serves
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* them with an ETag — repeat loads revalidate to a 304 instead of
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* re-downloading the catalog — and the service worker caches the versioned
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* URL cache-first for the offline relaunch. The `?v=` query the layout
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* appends busts both caches per deploy.
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*
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* Runs as a `prebuild`/`predev` step (the `sw-version.js` pattern); output
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* is gitignored. Content is the same public catalog JSON that ships in the
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* repository — no tenant data, no secrets.
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*/
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import { mkdirSync, readFileSync, writeFileSync } from "node:fs";
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import { join, dirname } from "node:path";
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import { fileURLToPath } from "node:url";
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const __dirname = dirname(fileURLToPath(import.meta.url));
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const repoRoot = join(__dirname, "..");
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const outDir = join(repoRoot, "public", "i18n");
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const LOCALES = ["de", "en", "fr", "es", "it", "pl"];
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mkdirSync(outDir, { recursive: true });
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const banner =
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"// AUTO-GENERATED by scripts/generate-i18n-boot.mjs — do not edit.\n";
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for (const locale of LOCALES) {
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const messages = JSON.parse(
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readFileSync(join(repoRoot, "messages", `${locale}.json`), "utf8"),
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);
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const payload = JSON.stringify({ locale, messages });
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writeFileSync(
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join(outDir, `${locale}.js`),
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`${banner}self.__HL_I18N = ${payload};\n`,
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"utf8",
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);
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}
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process.stdout.write(
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`generate-i18n-boot: wrote ${LOCALES.length} catalogs to public/i18n/\n`,
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);
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