fix: autopopulate locals.locale if not set

package.json

@@ -32,17 +32,17 @@
     "@babel/preset-env": "^7.16.11",
     "@commitlint/cli": "^16.2.1",
     "@commitlint/config-conventional": "^16.2.1",
-    "ava": "^4.0.1",
+    "ava": "^4.1.0",
     "cheerio": "^1.0.0-rc.10",
     "codecov": "^3.8.3",
     "cross-env": "^7.0.3",
     "ejs": "^3.1.6",
-    "eslint": "^8.9.0",
+    "eslint": "^8.10.0",
     "eslint-config-xo-lass": "^1.0.6",
     "eslint-plugin-node": "^11.1.0",
     "fixpack": "^4.0.0",
     "husky": "^7.0.4",
-    "lint-staged": "^12.3.4",
+    "lint-staged": "^12.3.5",
     "nodemailer-sendgrid": "^1.0.3",
     "nyc": "^15.1.0",
     "pug": "^3.0.2",

src/index.js

@@ -234,13 +234,15 @@ class Email {
 
       // support `locals.user.last_locale` (variable based name lastLocaleField)
       // (e.g. for <https://lad.js.org>)
+      const locale = i18n.getLocale();
       if (
         _.isObject(locals.user) &&
         _.isString(locals.user[this.config.lastLocaleField])
       )
         locals.locale = locals.user[this.config.lastLocaleField];
+      else if (!_.isString(locals.locale)) locals.locale = locale;
 
-      if (_.isString(locals.locale)) i18n.setLocale(locals.locale);
+      if (locale !== locals.locale) i18n.setLocale(locals.locale);
     }
 
     const res = await util.promisify(renderFn)(filePath, locals);