Port a few public.js changes from upstream, move some code around

glitch-soc's public.js was a bit out of date, and code was put inappropriately
to the common public.js

app/javascript/core/public.js

@@ -6,16 +6,6 @@ import ready from '../mastodon/ready';
 const { delegate } = require('rails-ujs');
 const { length } = require('stringz');
 
-ready(() => {
-  const history = createHistory();
-  const detailedStatuses = document.querySelectorAll('.public-layout .detailed-status');
-  const location = history.location;
-  if (detailedStatuses.length == 1 && (!location.state || !location.state.scrolledToDetailedStatus)) {
-    detailedStatuses[0].scrollIntoView();
-    history.replace(location.pathname, {...location.state, scrolledToDetailedStatus: true});
-  }
-});
-
 delegate(document, '.webapp-btn', 'click', ({ target, button }) => {
   if (button !== 0) {
     return true;

app/javascript/flavours/glitch/packs/public.js

@@ -2,14 +2,15 @@ import loadPolyfills from 'flavours/glitch/util/load_polyfills';
 import ready from 'flavours/glitch/util/ready';
 
 function main() {
-  const IntlRelativeFormat = require('intl-relativeformat').default;
+  const IntlMessageFormat = require('intl-messageformat').default;
+  const { timeAgoString } = require('flavours/glitch/components/relative_timestamp');
   const emojify = require('flavours/glitch/util/emoji').default;
   const { getLocale } = require('locales');
-  const { localeData } = getLocale();
+  const { messages } = getLocale();
   const React = require('react');
   const ReactDOM = require('react-dom');
-
-  localeData.forEach(IntlRelativeFormat.__addLocaleData);
+  const Rellax = require('rellax');
+  const createHistory = require('history').createBrowserHistory;
 
   ready(() => {
     const locale = document.documentElement.lang;
@@ -22,8 +23,6 @@ function main() {
       minute: 'numeric',
     });
 
-    const relativeFormat = new IntlRelativeFormat(locale);
-
     [].forEach.call(document.querySelectorAll('.emojify'), (content) => {
       content.innerHTML = emojify(content.innerHTML);
     });
@@ -38,16 +37,13 @@ function main() {
 
     [].forEach.call(document.querySelectorAll('time.time-ago'), (content) => {
       const datetime = new Date(content.getAttribute('datetime'));
+      const now      = new Date();
 
       content.title = dateTimeFormat.format(datetime);
-      content.textContent = relativeFormat.format(datetime);
-    });
-
-    [].forEach.call(document.querySelectorAll('.logo-button'), (content) => {
-      content.addEventListener('click', (e) => {
-        e.preventDefault();
-        window.open(e.target.href, 'mastodon-intent', 'width=400,height=400,resizable=no,menubar=no,status=no,scrollbars=yes');
-      });
+      content.textContent = timeAgoString({
+        formatMessage: ({ id, defaultMessage }, values) => (new IntlMessageFormat(messages[id] || defaultMessage, locale)).format(values),
+        formatDate: (date, options) => (new Intl.DateTimeFormat(locale, options)).format(date),
+      }, datetime, now, now.getFullYear());
     });
 
     const reactComponents = document.querySelectorAll('[data-component]');
@@ -55,11 +51,27 @@ function main() {
       import(/* webpackChunkName: "containers/media_container" */ 'flavours/glitch/containers/media_container')
         .then(({ default: MediaContainer }) => {
           const content = document.createElement('div');
+
           ReactDOM.render(<MediaContainer locale={locale} components={reactComponents} />, content);
           document.body.appendChild(content);
         })
         .catch(error => console.error(error));
     }
+
+    const parallaxComponents = document.querySelectorAll('.parallax');
+
+    if (parallaxComponents.length > 0 ) {
+      new Rellax('.parallax', { speed: -1 });
+    }
+
+    const history = createHistory();
+    const detailedStatuses = document.querySelectorAll('.public-layout .detailed-status');
+    const location = history.location;
+
+    if (detailedStatuses.length === 1 && (!location.state || !location.state.scrolledToDetailedStatus)) {
+      detailedStatuses[0].scrollIntoView();
+      history.replace(location.pathname, { ...location.state, scrolledToDetailedStatus: true });
+    }
   });
 }