add language file preparation script

extra/update-language-files/index.js

@@ -0,0 +1,75 @@
+// Need to use es6 to read language files
+
+import fs from "fs";
+import path from "path";
+import util from "util";
+
+// https://stackoverflow.com/questions/13786160/copy-folder-recursively-in-node-js
+/**
+ * Look ma, it's cp -R.
+ * @param {string} src  The path to the thing to copy.
+ * @param {string} dest The path to the new copy.
+ */
+const copyRecursiveSync = function (src, dest) {
+    let exists = fs.existsSync(src);
+    let stats = exists && fs.statSync(src);
+    let isDirectory = exists && stats.isDirectory();
+    if (isDirectory) {
+        fs.mkdirSync(dest);
+        fs.readdirSync(src).forEach(function (childItemName) {
+            copyRecursiveSync(path.join(src, childItemName),
+                path.join(dest, childItemName));
+        });
+    } else {
+        fs.copyFileSync(src, dest);
+    }
+};
+console.log(process.argv)
+const baseLangCode = process.argv[2] || "zh-HK";
+console.log("Base Lang: " + baseLangCode);
+fs.rmdirSync("./languages", { recursive: true });
+copyRecursiveSync("../../src/languages", "./languages");
+
+const en = (await import("./languages/en.js")).default;
+const baseLang = (await import(`./languages/${baseLangCode}.js`)).default;
+const files = fs.readdirSync("./languages");
+console.log(files);
+for (const file of files) {
+    if (file.endsWith(".js")) {
+        console.log("Processing " + file);
+        const lang = await import("./languages/" + file);
+
+        let obj;
+
+        if (lang.default) {
+            console.log("is js module");
+            obj = lang.default;
+        } else {
+            console.log("empty file");
+            obj = {};
+        }
+
+        // En first
+        for (const key in en) {
+            if (! obj[key]) {
+                obj[key] = en[key];
+            }
+        }
+
+        // Base second
+        for (const key in baseLang) {
+            if (! obj[key]) {
+                obj[key] = key;
+            }
+        }
+
+        const code = "export default " + util.inspect(obj, {
+            depth: null,
+        });
+
+        fs.writeFileSync(`../../src/languages/${file}`, code);
+
+    }
+}
+
+fs.rmdirSync("./languages", { recursive: true });