add translation comparison script

package.json

@@ -12,6 +12,7 @@
     "dev": "yarn codes:inject && vuepress dev site",
     "build": "yarn codes:inject && vuepress build site",
     "format": "prettier --write ./site/**/*{.md,.js,.json,.vue}",
+    "translations:compare": "node ./scripts/compare_translations.js",
     "codes:inject": "node ./scripts/inject_codes.js && yarn format",
     "codes:clean": "node ./scripts/clean_codes.js && yarn format"
   },

scripts/compare_translations.js

@@ -0,0 +1,56 @@
+const path = require('path');
+const locales = require(path.join(__dirname, '../site/.vuepress/i18n/locales.json'));
+
+/**
+ * Gets all leave nodes from the specified object
+ * @param {*} node The root node
+ * @param {*} path The already visited path
+ */
+const getLeaves = (node, path = null) => {
+  if (typeof node === 'string') return leavePaths.push(path);
+  if (typeof node != 'object') throw new Error(typeof node);
+  const currentPath = path ? `${path}.` : '';
+  Object.keys(node).forEach((key) => getLeaves(node[key], `${currentPath}${key}`));
+};
+
+/**
+ * Gets a nested property of the specified node
+ * @param {*} node The root node
+ * @param {*} path The property path
+ */
+const getNestedProperty = (node, path) => {
+  const props = path.split('.');
+  let currentValue = node;
+
+  while (currentValue && props.length > 0) {
+    currentValue = currentValue[props.shift()];
+  }
+
+  return currentValue;
+};
+
+// Load the translation files
+const translations = Object.keys(locales).map((locale) => ({
+  lang: locales[locale].lang,
+  values: require(path.join(__dirname, `../site/.vuepress/i18n/${locales[locale].lang}.json`)),
+}));
+
+// Set the default translation
+const defaultTranslation = translations.find((t) => t.lang === locales['/'].lang);
+console.log(`Default translation set to ${defaultTranslation.lang}`);
+
+// Holds the paths to all leave nodes of the default translation
+const leavePaths = [];
+getLeaves(defaultTranslation.values);
+console.log('Detected translations: ', leavePaths);
+
+// Compare all translations to the default translation
+translations.forEach((t) => {
+  console.log(`Comparing ${t.lang} to ${defaultTranslation.lang}`);
+
+  leavePaths.forEach((p) => {
+    const value = getNestedProperty(t.values, p);
+    if (value == null || typeof value !== 'string')
+      console.warn(`${t.lang} is missing a translation at '${p}'`);
+  });
+});