Add scripts to convert ftl to/from Transifex JSON (#3058)

js-build/ftl-to-json.mjs

@@ -0,0 +1,38 @@
+import { ftlToJSON } from "ftl-tx";
+import fs from 'fs-extra';
+import { dirname, join } from 'path';
+import { fileURLToPath } from 'url';
+import { onError, onSuccess } from './utils.js';
+
+const ROOT = join(dirname(fileURLToPath(import.meta.url)), '..');
+const JSONDir = join(ROOT, 'tmp', 'tx');
+
+async function getJSON() {
+	const t1 = performance.now();
+	await fs.mkdirp(JSONDir);
+	const sourcefile = join(ROOT, 'chrome', 'locale', 'en-US', 'zotero', 'zotero.ftl');
+	const destFile = join(JSONDir, 'zotero_en_US.json');
+	const ftl = await fs.readFile(sourcefile, 'utf8');
+	const json = ftlToJSON(ftl, { transformTerms: false, storeTermsInJSON: false });
+	await fs.outputJSON(destFile, json);
+	const t2 = performance.now();
+	return ({
+		action: 'ftl->json',
+		count: 1,
+		totalCount: 1,
+		processingTime: t2 - t1
+	});
+}
+
+if (process.argv[1] === fileURLToPath(import.meta.url)) {
+	(async () => {
+		try {
+			onSuccess(await getJSON());
+		}
+		catch (err) {
+			process.exitCode = 1;
+			global.isError = true;
+			onError(err);
+		}
+	})();
+}