Merge remote-tracking branch 'origin/develop' into create-group

app/soapbox/utils/groups.ts

@@ -0,0 +1,35 @@
+import { groupSearchHistory } from 'soapbox/settings';
+
+const RECENT_SEARCHES_KEY = 'soapbox:recent-group-searches';
+
+const clearRecentGroupSearches = (currentUserId: string) => groupSearchHistory.remove(currentUserId);
+
+const saveGroupSearch = (currentUserId: string, search: string) => {
+  let currentSearches: string[] = [];
+
+  if (groupSearchHistory.get(currentUserId)) {
+    currentSearches = groupSearchHistory.get(currentUserId);
+  }
+
+  if (currentSearches.indexOf(search) === -1) {
+    currentSearches.unshift(search);
+    if (currentSearches.length > 10) {
+      currentSearches.pop();
+    }
+
+    groupSearchHistory.set(currentUserId, currentSearches);
+
+    return currentSearches;
+  } else {
+    // The search term has already been searched. Move it to the beginning
+    // of the cached list.
+    const indexOfSearch = currentSearches.indexOf(search);
+    const nextCurrentSearches = [...currentSearches];
+    nextCurrentSearches.splice(0, 0, ...nextCurrentSearches.splice(indexOfSearch, 1));
+    localStorage.setItem(RECENT_SEARCHES_KEY, JSON.stringify(nextCurrentSearches));
+
+    return nextCurrentSearches;
+  }
+};
+
+export { clearRecentGroupSearches, saveGroupSearch };