Load locales on app init based on the user's browser

Author: davidrios

package.json

@@ -2,6 +2,7 @@
   "author": "Emmanuel Vilsbol <emmanuel@vilsbol.com>",
   "dependencies": {
     "@fluent/bundle": "^0.16.0",
+    "@fluent/langneg": "^0.5.0",
     "@vue/composition-api": "^1.0.0-rc.6",
     "axios": "^0.19.0",
     "date-fns": "^1.30.1",

src/common/fluent-utils.js

@@ -0,0 +1,75 @@
+import { FluentBundle, FluentResource } from "@fluent/bundle";
+import { negotiateLanguages } from "@fluent/langneg";
+import { createFluentVue } from "fluent-vue";
+
+const DEFAULT_LOCALE = "en-US";
+const SUPPORTED_LOCALES = ["en-US", "pt-BR"];
+
+function getDesiredLocales(maxLanguages) {
+  const desired = negotiateLanguages(navigator.languages, SUPPORTED_LOCALES, {
+    defaultLocale: DEFAULT_LOCALE,
+    strategy: "matching"
+  });
+
+  const allowed = [];
+  let previous = null;
+  let count = -1;
+  for (const locale of desired) {
+    const lang = locale.substr(0, 2);
+
+    if (previous != lang) {
+      previous = lang;
+      count += 1;
+    }
+
+    if (count >= maxLanguages) {
+      break;
+    }
+
+    allowed.push(locale);
+  }
+
+  if (!allowed.includes(DEFAULT_LOCALE)) {
+    allowed.push(DEFAULT_LOCALE);
+  }
+
+  return allowed;
+}
+
+async function loadCatalog(locale, catalogName) {
+  try {
+    const { default: contents } = await import(
+      `../locales/${locale}/${catalogName}.ftl`
+    );
+    return contents;
+  } catch (err) {
+    console.warn(`Could not load catalog ${locale}/${catalogName}`);
+    return "";
+  }
+}
+
+async function loadAndCreateFluentVue(maxLanguages = 1) {
+  return Promise.all(
+    getDesiredLocales(maxLanguages).map(locale =>
+      loadCatalog(locale, "global").then(data => ({ locale, data }))
+    )
+  ).then(catalogsData => {
+    const bundles = catalogsData.map(({ locale, data }) => {
+      const bundle = new FluentBundle(locale);
+      const errors = bundle.addResource(new FluentResource(data));
+
+      if (errors.length > 0) {
+        console.warn(`Errors loading fluent resource ${locale}/global`, errors);
+      }
+
+      return bundle;
+    });
+
+    return createFluentVue({
+      locale: catalogsData.map(({ locale }) => locale),
+      bundles: bundles
+    });
+  });
+}
+
+export { DEFAULT_LOCALE, SUPPORTED_LOCALES, loadAndCreateFluentVue };

src/main.js

@@ -1,4 +1,5 @@
 import Vue from "vue";
+
 import App from "./App.vue";
 import router from "./router";
 import store from "./store";
@@ -8,20 +9,25 @@ import { CHECK_AUTH } from "./store/actions.type";
 import ApiService from "./common/api.service";
 import DateFilter from "./common/date.filter";
 import ErrorFilter from "./common/error.filter";
+import { loadAndCreateFluentVue } from "./common/fluent-utils";
+
+loadAndCreateFluentVue().then(fluent => {
+  Vue.use(fluent);
 
-Vue.config.productionTip = false;
-Vue.filter("date", DateFilter);
-Vue.filter("error", ErrorFilter);
+  Vue.config.productionTip = false;
+  Vue.filter("date", DateFilter);
+  Vue.filter("error", ErrorFilter);
 
-ApiService.init();
+  ApiService.init();
 
-// Ensure we checked auth before each page load.
-router.beforeEach((to, from, next) =>
-  Promise.all([store.dispatch(CHECK_AUTH)]).then(next)
-);
+  // Ensure we checked auth before each page load.
+  router.beforeEach((to, from, next) =>
+    Promise.all([store.dispatch(CHECK_AUTH)]).then(next)
+  );
 
-new Vue({
-  router,
-  store,
-  render: h => h(App)
-}).$mount("#app");
+  new Vue({
+    router,
+    store,
+    render: h => h(App)
+  }).$mount("#app");
+});

yarn.lock

@@ -981,6 +981,11 @@
     "@types/istanbul-lib-coverage" "*"
     "@types/istanbul-lib-report" "*"
 
+"@types/json-schema@^7.0.6":
+  version "7.0.7"
+  resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.7.tgz#98a993516c859eb0d5c4c8f098317a9ea68db9ad"
+  integrity sha512-cxWFQVseBm6O9Gbw1IWb8r6OS4OhSt3hPZLkFApLjM8TEXROBuQGLAH2i2gZpcXdLBIrpXuTDhH7Vbm1iXmNGA==
+
 "@types/minimatch@*":
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/@types/minimatch/-/minimatch-3.0.3.tgz#3dca0e3f33b200fc7d1139c0cd96c1268cadfd9d"
@@ -1523,6 +1528,11 @@ ajv-keywords@^3.1.0, ajv-keywords@^3.4.1:
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.4.1.tgz#ef916e271c64ac12171fd8384eaae6b2345854da"
   integrity sha512-RO1ibKvd27e6FEShVFfPALuHI3WjSVNeK5FIsmme/LYRNxjKuNj+Dt7bucLa6NdSv3JcVTyMlm9kGR84z1XpaQ==
 
+ajv-keywords@^3.5.2:
+  version "3.5.2"
+  resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.5.2.tgz#31f29da5ab6e00d1c2d329acf7b5929614d5014d"
+  integrity sha512-5p6WTN0DdTGVQk6VjcEju19IgaHudalcfabD7yhDGeA6bcQnmL+CpveLJq/3hvfwd1aof6L386Ougkx6RfyMIQ==
+
 ajv@^5.2.3, ajv@^5.3.0:
   version "5.5.2"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-5.5.2.tgz#73b5eeca3fab653e3d3f9422b341ad42205dc965"
@@ -1543,6 +1553,16 @@ ajv@^6.1.0, ajv@^6.10.2, ajv@^6.5.5:
     json-schema-traverse "^0.4.1"
     uri-js "^4.2.2"
 
+ajv@^6.12.5:
+  version "6.12.6"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.6.tgz#baf5a62e802b07d977034586f8c3baf5adf26df4"
+  integrity sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==
+  dependencies:
+    fast-deep-equal "^3.1.1"
+    fast-json-stable-stringify "^2.0.0"
+    json-schema-traverse "^0.4.1"
+    uri-js "^4.2.2"
+
 alphanum-sort@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/alphanum-sort/-/alphanum-sort-1.0.2.tgz#97a1119649b211ad33691d9f9f486a8ec9fbe0a3"
@@ -3809,6 +3829,11 @@ emojis-list@^2.0.0:
   resolved "https://registry.yarnpkg.com/emojis-list/-/emojis-list-2.1.0.tgz#4daa4d9db00f9819880c79fa457ae5b09a1fd389"
   integrity sha1-TapNnbAPmBmIDHn6RXrlsJof04k=
 
+emojis-list@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/emojis-list/-/emojis-list-3.0.0.tgz#5570662046ad29e2e916e71aae260abdff4f6a78"
+  integrity sha512-/kyM18EfinwXZbno9FyUGeFh87KC8HRQBQGildHZbEuRyWFOmv1U10o9BBp8XVZDVNNuQKyIGIu5ZYAAXJ0V2Q==
+
 encodeurl@~1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
@@ -4314,6 +4339,11 @@ fast-deep-equal@^2.0.1:
   resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz#7b05218ddf9667bf7f370bf7fdb2cb15fdd0aa49"
   integrity sha1-ewUhjd+WZ79/Nwv3/bLLFf3Qqkk=
 
+fast-deep-equal@^3.1.1:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz#3a7d56b559d6cbc3eb512325244e619a65c6c525"
+  integrity sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==
+
 fast-diff@^1.1.2:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/fast-diff/-/fast-diff-1.2.0.tgz#73ee11982d86caaf7959828d519cfe927fac5f03"
@@ -6541,6 +6571,13 @@ json5@^2.1.0:
   dependencies:
     minimist "^1.2.0"
 
+json5@^2.1.2:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-2.2.0.tgz#2dfefe720c6ba525d9ebd909950f0515316c89a3"
+  integrity sha512-f+8cldu7X/y7RAJurMEJmdoKXGB/X550w2Nr3tTbezL6RwEE/iMcm+tZnXeoZtKuOq6ft8+CqzEkrIgx1fPoQA==
+  dependencies:
+    minimist "^1.2.5"
+
 jsonfile@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-4.0.0.tgz#8771aae0799b64076b76640fca058f9c10e33ecb"
@@ -6776,6 +6813,15 @@ loader-utils@^1.0.1, loader-utils@^1.0.2, loader-utils@^1.1.0, loader-utils@^1.2
     emojis-list "^2.0.0"
     json5 "^1.0.1"
 
+loader-utils@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/loader-utils/-/loader-utils-2.0.0.tgz#e4cace5b816d425a166b5f097e10cd12b36064b0"
+  integrity sha512-rP4F0h2RaWSvPEkD7BLDFQnvSf+nK+wr3ESUjNTyAGobqrijmW92zc+SO6d4p4B1wh7+B/Jg1mkQe5NYUEHtHQ==
+  dependencies:
+    big.js "^5.2.2"
+    emojis-list "^3.0.0"
+    json5 "^2.1.2"
+
 locate-path@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-2.0.0.tgz#2b568b265eec944c6d9c0de9c3dbbbca0354cd8e"
@@ -7206,6 +7252,11 @@ minimist@^1.1.1, minimist@^1.1.3, minimist@^1.2.0:
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
   integrity sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=
 
+minimist@^1.2.5:
+  version "1.2.5"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
+  integrity sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==
+
 minimist@~0.0.1:
   version "0.0.10"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
@@ -8862,6 +8913,14 @@ raw-body@2.4.0:
     iconv-lite "0.4.24"
     unpipe "1.0.0"
 
+raw-loader@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/raw-loader/-/raw-loader-4.0.2.tgz#1aac6b7d1ad1501e66efdac1522c73e59a584eb6"
+  integrity sha512-ZnScIV3ag9A4wPX/ZayxL/jZH+euYb6FcUinPcgiQW0+UBtEv0O6Q3lGd3cqJ+GHH+rksEv3Pj99oxJ3u3VIKA==
+  dependencies:
+    loader-utils "^2.0.0"
+    schema-utils "^3.0.0"
+
 rc@^1.2.7:
   version "1.2.8"
   resolved "https://registry.yarnpkg.com/rc/-/rc-1.2.8.tgz#cd924bf5200a075b83c188cd6b9e211b7fc0d3ed"
@@ -9401,6 +9460,15 @@ schema-utils@^1.0.0:
     ajv-errors "^1.0.0"
     ajv-keywords "^3.1.0"
 
+schema-utils@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-3.0.0.tgz#67502f6aa2b66a2d4032b4279a2944978a0913ef"
+  integrity sha512-6D82/xSzO094ajanoOSbe4YvXWMfn2A//8Y1+MUqFAJul5Bs+yn36xbK9OtNDcRVSBJ9jjeoXftM6CfztsjOAA==
+  dependencies:
+    "@types/json-schema" "^7.0.6"
+    ajv "^6.12.5"
+    ajv-keywords "^3.5.2"
+
 scss-tokenizer@^0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/scss-tokenizer/-/scss-tokenizer-0.2.3.tgz#8eb06db9a9723333824d3f5530641149847ce5d1"