Add support for custom emojis in poll options (#10322)

* Backend changes for custom emoji support in poll options

* Serialize poll emojis in REST API

* Render custom emojis in poll options

* Render custom emoji in poll options on public pages

2 files changed, 15 insertions, 2 deletions

diff --git a/app/javascript/mastodon/actions/importer/normalizer.js b/app/javascript/mastodon/actions/importer/normalizer.js
index ea80c0efb..5badb0c49 100644
--- a/app/javascript/mastodon/actions/importer/normalizer.js
+++ b/app/javascript/mastodon/actions/importer/normalizer.js
@@ -71,9 +71,11 @@ export function normalizeStatus(status, normalOldStatus) {
 export function normalizePoll(poll) {
   const normalPoll = { ...poll };
 
+  const emojiMap = makeEmojiMap(normalPoll);
+
   normalPoll.options = poll.options.map(option => ({
     ...option,
-    title_emojified: emojify(escapeTextContentForBrowser(option.title)),
+    title_emojified: emojify(escapeTextContentForBrowser(option.title), emojiMap),
   }));
 
   return normalPoll;
diff --git a/app/javascript/mastodon/components/poll.js b/app/javascript/mastodon/components/poll.js
index a1b297ce7..56331cb29 100644
--- a/app/javascript/mastodon/components/poll.js
+++ b/app/javascript/mastodon/components/poll.js
@@ -44,6 +44,11 @@ const timeRemainingString = (intl, date, now) => {
   return relativeTime;
 };
 
+const makeEmojiMap = record => record.get('emojis').reduce((obj, emoji) => {
+  obj[`:${emoji.get('shortcode')}:`] = emoji.toJS();
+  return obj;
+}, {});
+
 export default @injectIntl
 class Poll extends ImmutablePureComponent {
 
@@ -99,6 +104,12 @@ class Poll extends ImmutablePureComponent {
     const active             = !!this.state.selected[`${optionIndex}`];
     const showResults        = poll.get('voted') || poll.get('expired');
 
+    let titleEmojified = option.get('title_emojified');
+    if (!titleEmojified) {
+      const emojiMap = makeEmojiMap(poll);
+      titleEmojified = emojify(escapeTextContentForBrowser(option.get('title')), emojiMap);
+    }
+
     return (
       <li key={option.get('title')}>
         {showResults && (
@@ -122,7 +133,7 @@ class Poll extends ImmutablePureComponent {
           {!showResults && <span className={classNames('poll__input', { checkbox: poll.get('multiple'), active })} />}
           {showResults && <span className='poll__number'>{Math.round(percent)}%</span>}
 
-          <span dangerouslySetInnerHTML={{ __html: option.get('title_emojified', emojify(escapeTextContentForBrowser(option.get('title')))) }} />
+          <span dangerouslySetInnerHTML={{ __html: titleEmojified }} />
         </label>
       </li>
     );