[Glitch] Do not overwrite some status attributes in reducer

Backport 386365090c

app/javascript/flavours/glitch/reducers/statuses.js

@@ -62,16 +62,20 @@ const normalizeStatus = (state, status) => {
     normalStatus.reblog = status.reblog.id;
   }
 
-  const searchContent = [status.spoiler_text, status.content].join('\n\n').replace(/<br \/>/g, '\n').replace(/<\/p><p>/g, '\n\n');
+  // Only calculate these values when status first encountered
+  // Otherwise keep the ones already in the reducer
+  if (!state.has(status.id)) {
+    const searchContent = [status.spoiler_text, status.content].join('\n\n').replace(/<br \/>/g, '\n').replace(/<\/p><p>/g, '\n\n');
 
-  const emojiMap = normalStatus.emojis.reduce((obj, emoji) => {
-    obj[`:${emoji.shortcode}:`] = emoji;
-    return obj;
-  }, {});
+    const emojiMap = normalStatus.emojis.reduce((obj, emoji) => {
+      obj[`:${emoji.shortcode}:`] = emoji;
+      return obj;
+    }, {});
 
-  normalStatus.search_index = domParser.parseFromString(searchContent, 'text/html').documentElement.textContent;
-  normalStatus.contentHtml = emojify(normalStatus.content, emojiMap);
-  normalStatus.spoilerHtml = emojify(escapeTextContentForBrowser(normalStatus.spoiler_text || ''), emojiMap);
+    normalStatus.search_index = domParser.parseFromString(searchContent, 'text/html').documentElement.textContent;
+    normalStatus.contentHtml  = emojify(normalStatus.content, emojiMap);
+    normalStatus.spoilerHtml  = emojify(escapeTextContentForBrowser(normalStatus.spoiler_text || ''), emojiMap);
+  }
 
   return state.update(status.id, ImmutableMap(), map => map.mergeDeep(fromJS(normalStatus)));
 };