sendou.ink/scripts/generate-resources-file.ts

import { Glob, pathToFileURL } from "bun";
import camelCase from "just-camel-case";
import { capitalize } from "~/utils/strings";

const glob = new Glob("locales/*/*.json");

const targetPath = pathToFileURL("./app/modules/i18n/resources.server.ts");

function main() {
	const record: Record<string, string[]> = {};
	const lines: string[] = [
		"// This file is generated by scripts/generate-resources-file.ts",
		"\n",
	];

	for (const file of glob.scanSync(".")) {
		const [, lang, namespace] = file.replace(".json", "").split("/");

		if (!record[lang]) {
			record[lang] = [];
		}

		record[lang].push(namespace);
	}

	lines.push(...imports(record));
	lines.push("\n");
	lines.push("export const resources = {", ...resourcesObject(record), "};");
	lines.push("\n");
	lines.push("export type Namespace = keyof typeof resources.en;");

	Bun.write(targetPath, lines.join("\n"));
}

function imports(record: Record<string, string[]>) {
	const lines: string[] = [];

	for (const lang in record) {
		const namespaces = record[lang];
		const imports = namespaces.map(
			(namespace) =>
				`import ${namespaceLangToLocalVar(lang, namespace)} from "../../../locales/${lang}/${namespace}.json";`,
		);

		lines.push(...imports);
	}

	return lines;
}

function namespaceLangToLocalVar(lang: string, namespace: string) {
	const base = camelCase(namespace);

	if (lang === "en") return base;

	return `${base}${capitalize(camelCase(lang))}`;
}

function resourcesObject(record: Record<string, string[]>) {
	const lines: string[] = [];

	for (const lang in record) {
		const namespaces = record[lang];

		lines.push(
			`	"${lang}": {`,
			...namespaces.map(
				(namespace) =>
					`${namespace.includes("-") ? `"${namespace}"` : namespace}: ${namespaceLangToLocalVar(lang, namespace)},`,
			),
			"	},",
		);
	}

	return lines;
}

main();