Add DM conversations mode similar to upstream

app/javascript/flavours/glitch/components/display_name.js

@@ -10,24 +10,56 @@ export default function DisplayName ({
   className,
   inline,
   localDomain,
+  others,
+  onAccountClick,
 }) {
   const computedClass = classNames('display-name', { inline }, className);
 
   if (!account) return null;
 
+  let displayName, suffix;
+
   let acct = account.get('acct');
+
   if (acct.indexOf('@') === -1 && localDomain) {
     acct = `${acct}@${localDomain}`;
   }
 
-  //  The result.
-  return account ? (
+  if (others && others.size > 0) {
+    displayName = others.take(2).map(a => (
+      <a
+        href={a.get('url')}
+        target='_blank'
+        onClick={(e) => onAccountClick(a.get('id'), e)}
+        title={`@${a.get('acct')}`}
+      >
+        <bdi key={a.get('id')}>
+          <strong className='display-name__html' dangerouslySetInnerHTML={{ __html: a.get('display_name_html') }} />
+        </bdi>
+      </a>
+    )).reduce((prev, cur) => [prev, ', ', cur]);
+
+    if (others.size - 2 > 0) {
+     displayName.push(` +${others.size - 2}`);
+    }
+
+    suffix = (
+      <a href={account.get('url')} target='_blank' onClick={(e) => onAccountClick(account.get('id'), e)}>
+        <span className='display-name__account'>@{acct}</span>
+      </a>
+    );
+  } else {
+    displayName = <bdi><strong className='display-name__html' dangerouslySetInnerHTML={{ __html: account.get('display_name_html') }} /></bdi>;
+    suffix      = <span className='display-name__account'>@{acct}</span>;
+  }
+
+  return (
     <span className={computedClass}>
-      <bdi><strong className='display-name__html' dangerouslySetInnerHTML={{ __html: account.get('display_name_html') }} /></bdi>
+      {displayName}
       {inline ? ' ' : null}
-      <span className='display-name__account'>@{acct}</span>
+      {suffix}
     </span>
-  ) : null;
+  );
 }
 
 //  Props.
@@ -36,4 +68,6 @@ DisplayName.propTypes = {
   className: PropTypes.string,
   inline: PropTypes.bool,
   localDomain: PropTypes.string,
+  others: ImmutablePropTypes.list,
+  handleClick: PropTypes.func,
 };