Added unused translations counter

scripts/translations/unused.js

@@ -0,0 +1,63 @@
+const fs = require('fs');
+const path = require('path');
+
+const SRC_DIR = '../../client/src/'
+const LOCALES_DIR = '../../client/src/__locales';
+const BASE_FILE = path.join(LOCALES_DIR, 'en.json');
+
+// Strings that may be found by the algorithm,
+// but in fact they are used.
+const KNOWN_USED_STRINGS = {
+    'blocking_mode_refused': true,
+    'blocking_mode_nxdomain': true,
+    'blocking_mode_custom_ip': true,
+}
+
+function traverseDir(dir, callback) {
+    fs.readdirSync(dir).forEach(file => {
+        let fullPath = path.join(dir, file);
+        if (fs.lstatSync(fullPath).isDirectory()) {
+            traverseDir(fullPath, callback);
+        } else {
+            callback(fullPath);
+        }
+    });
+}
+
+const contains = (key, files) => {
+    for (let file of files) {
+        if (file.includes(key)) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+const main = () => {
+    const baseLanguage = require(BASE_FILE);
+    const files = [];
+
+    traverseDir(SRC_DIR, (path) => {
+        const canContain = (path.endsWith('.js') || path.endsWith('.json')) &&
+            !path.includes(LOCALES_DIR);
+
+        if (canContain) {
+            files.push(fs.readFileSync(path).toString());
+        }
+    });
+
+    const unused = [];
+    for (let key in baseLanguage) {
+        if (!contains(key, files) && !KNOWN_USED_STRINGS[key]) {
+            unused.push(key);
+        }
+    }
+
+    console.log('Unused keys:');
+    for (let key of unused) {
+        console.log(key);
+    }
+}
+
+main();