Revert some glitch-specific refactoring

In order to keep my sanity when porting changes between glitch-soc and upstream.

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

@@ -225,21 +225,35 @@ export default class MediaGallery extends React.PureComponent {
     this.props.onOpenMedia(this.props.media, index);
   }
 
+  isStandaloneEligible() {
+    const { media, standalone } = this.props;
+    return standalone && media.size === 1 && media.getIn([0, 'meta', 'small', 'aspect']);
+  }
+
   render () {
-    const {
-      handleClick,
-      handleOpen,
-    } = this;
-    const {
-      fullwidth,
-      intl,
-      letterbox,
-      media,
-      sensitive,
-      standalone,
-    } = this.props;
+    const { media, intl, sensitive, letterbox, fullwidth } = this.props;
     const { visible } = this.state;
     const size = media.take(4).size;
+
+    let children;
+
+    if (!visible) {
+      let warning = <FormattedMessage {...(sensitive ? messages.warning : messages.hidden)} />;
+
+      children = (
+        <button className='media-spoiler' type='button' onClick={this.handleOpen}>
+          <span className='media-spoiler__warning'>{warning}</span>
+          <span className='media-spoiler__trigger'><FormattedMessage {...messages.toggle} /></span>
+        </button>
+      );
+    } else {
+      if (this.isStandaloneEligible()) {
+        children = <Item standalone attachment={media.get(0)} onClick={this.handleClick} />;
+      } else {
+        children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} onClick={this.handleClick} attachment={attachment} index={i} size={size} letterbox={letterbox} />);
+      }
+    }
+
     const computedClass = classNames('media-gallery', `size-${size}`, { 'full-width': fullwidth });
 
     return (
@@ -248,7 +262,7 @@ export default class MediaGallery extends React.PureComponent {
           <div className='sensitive-info'>
             <IconButton
               icon='eye'
-              onClick={handleOpen}
+              onClick={this.handleOpen}
               overlay
               title={intl.formatMessage(messages.toggle_visible)}
             />
@@ -259,46 +273,8 @@ export default class MediaGallery extends React.PureComponent {
             ) : null}
           </div>
         ) : null}
-        {function () {
-          switch (true) {
-          case !visible:
-            return (
-              <button
-                className='media-spoiler'
-                type='button'
-                onClick={handleOpen}
-              >
-                <span className='media-spoiler__warning'>
-                  <FormattedMessage {...(sensitive ? messages.warning : messages.hidden)} />
-                </span>
-                <span className='media-spoiler__trigger'>
-                  <FormattedMessage {...messages.toggle} />
-                </span>
-              </button>
-            );
-          case standalone && media.size === 1 && !!media.getIn([0, 'meta', 'small', 'aspect']):
-            return (
-              <Item
-                attachment={media.get(0)}
-                onClick={handleClick}
-                standalone
-              />
-            );
-          default:
-            return media.take(4).map(
-              (attachment, i) => (
-                <Item
-                  attachment={attachment}
-                  index={i}
-                  key={attachment.get('id')}
-                  letterbox={letterbox}
-                  onClick={handleClick}
-                  size={size}
-                />
-              )
-            );
-          }
-        }()}
+
+        {children}
       </div>
     );
   }