Add localization of datetime in public page (#3296)

app/javascript/packs/public.js

@@ -1,66 +1,40 @@
 import emojify from 'mastodon/emoji';
+import { getLocale } from 'mastodon/locales';
 import { length } from 'stringz';
-import { default as dateFormat } from 'date-fns/format';
-import distanceInWordsStrict from 'date-fns/distance_in_words_strict';
+import IntlRelativeFormat from 'intl-relativeformat';
 import { delegate } from 'rails-ujs';
 
 require.context('../images/', true);
 
-const parseFormat = (format) => format.replace(/%(\w)/g, (_, modifier) => {
-  switch (modifier) {
-  case '%':
-    return '%';
-  case 'a':
-    return 'ddd';
-  case 'A':
-    return 'ddd';
-  case 'b':
-    return 'MMM';
-  case 'B':
-    return 'MMMM';
-  case 'd':
-    return 'DD';
-  case 'H':
-    return 'HH';
-  case 'I':
-    return 'hh';
-  case 'l':
-    return 'H';
-  case 'm':
-    return 'M';
-  case 'M':
-    return 'mm';
-  case 'p':
-    return 'A';
-  case 'S':
-    return 'ss';
-  case 'w':
-    return 'd';
-  case 'y':
-    return 'YY';
-  case 'Y':
-    return 'YYYY';
-  default:
-    return `%${modifier}`;
-  }
+const { localeData } = getLocale();
+localeData.forEach(IntlRelativeFormat.__addLocaleData);
+
+function main() {
+  const locale = document.documentElement.lang;
+  const dateTimeFormat = new Intl.DateTimeFormat(locale, {
+    year: 'numeric',
+    month: 'long',
+    day: 'numeric',
+    hour: 'numeric',
+    minute: 'numeric',
   });
+  const relativeFormat = new IntlRelativeFormat(locale);
 
   document.addEventListener('DOMContentLoaded', () => {
     [].forEach.call(document.querySelectorAll('.emojify'), (content) => {
       content.innerHTML = emojify(content.innerHTML);
     });
 
-  [].forEach.call(document.querySelectorAll('time[data-format]'), (content) => {
-    const format = parseFormat(content.dataset.format);
-    const formattedDate = dateFormat(content.getAttribute('datetime'), format);
+    [].forEach.call(document.querySelectorAll('time.formatted'), (content) => {
+      const datetime = new Date(content.getAttribute('datetime'));
+      const formattedDate = dateTimeFormat.format(datetime);
+      content.title = formattedDate;
       content.textContent = formattedDate;
     });
 
     [].forEach.call(document.querySelectorAll('time.time-ago'), (content) => {
-    const timeAgo = distanceInWordsStrict(new Date(), content.getAttribute('datetime'), {
-      addSuffix: true,
-    });
-    content.textContent = timeAgo;
+      const datetime = new Date(content.getAttribute('datetime'));
+      content.textContent = relativeFormat.format(datetime);;
     });
   });
 
@@ -109,3 +83,14 @@ delegate(document, '.account_note', 'input', ({ target }) => {
       noteCounter.textContent = 160 - length(target.value);
     }
   });
+}
+
+if (!window.Intl) {
+  import(/* webpackChunkName: "base_polyfills" */ 'mastodon/base_polyfills').then(() => {
+    main();
+  }).catch(error => {
+    console.log(error); // eslint-disable-line no-console
+  });
+} else {
+  main();
+}

app/views/stream_entries/_detailed_status.html.haml

@@ -31,7 +31,7 @@
   .detailed-status__meta
     %data.dt-published{ value: status.created_at.to_time.iso8601 }
     = link_to TagManager.instance.url_for(status), class: 'detailed-status__datetime u-url u-uid', target: stream_link_target, rel: 'noopener' do
-      %time{ datetime: status.created_at.iso8601, title: l(status.created_at), data: { format: t('time.formats.default') } }= l(status.created_at)
+      %time.formatted{ datetime: status.created_at.iso8601, title: l(status.created_at) }= l(status.created_at)
     ·
     - if status.application
       - if status.application.website.blank?

package.json

@@ -42,7 +42,6 @@
     "coffee-script": "^1.12.5",
     "compression-webpack-plugin": "^0.4.0",
     "css-loader": "^0.28.0",
-    "date-fns": "^1.28.4",
     "dotenv": "^4.0.0",
     "emojione": "^2.2.7",
     "emojione-picker": "^2.2.1",
@@ -57,6 +56,7 @@
     "immutable": "^3.8.1",
     "intersection-observer": "^0.2.1",
     "intl": "^1.2.5",
+    "intl-relativeformat": "^1.3.0",
     "is-nan": "^1.2.1",
     "js-yaml": "^3.8.3",
     "lodash": "^4.17.4",

yarn.lock

@@ -2016,10 +2016,6 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
-date-fns@^1.28.4:
-  version "1.28.4"
-  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-1.28.4.tgz#7938aec34ba31fc8bd134d2344bc2e0bbfd95165"
-
 date-now@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"