example: React demo - last features

README.md

@@ -94,6 +94,19 @@ API_URL=<Optional, Stream API URL>
 
 2. Install dependencies: `yarn` (from the repository root)
 
+### Typical use-case
+
+Run these scripts in the following order from `trst-data-generator` folder:
+
+```bash
+yarn create-users
+yarn create-follows
+# Adjust what features you need
+yarn create-posts --features link,attachment,mention,poll,reaction,comment,bookmark,repost
+# Optional, only useful if you have story feeds
+yarn create-stories
+```
+
 ### Available Scripts
 
 Run these commands from the `test-data-generator/` directory:
@@ -142,18 +155,6 @@ yarn create-posts --features link,attachment,mention,poll,reaction,comment,bookm
 
 > Note: Each feature has a probability of being included (not every post will have every enabled feature). Link and attachment are mutually exclusive per post.
 
-### Usage
-
-Typical order of operations:
-
-```bash
-cd test-data-generator
-yarn create-users
-yarn create-follows
-yarn create-posts --features link,attachment,mention,poll,reaction,comment,bookmark,repost
-yarn create-stories
-```
-
 ## Local Setup
 
 ### Prerequisites

sample-apps/react-demo/app/ClientApp.tsx

@@ -14,7 +14,7 @@ import { generateUsername } from 'unique-username-generator';
 import { useEffect, useMemo, type PropsWithChildren } from 'react';
 import { useSearchParams, useRouter } from 'next/navigation';
 import { LoadingIndicator } from './components/utility/LoadingIndicator';
-import { userIdToUserName } from './utility/user-id-to-name';
+import { userIdToName } from './utility/userIdToName';
 
 export const ClientApp = ({ children }: PropsWithChildren) => {
   const searchParams = useSearchParams();
@@ -40,7 +40,7 @@ export const ClientApp = ({ children }: PropsWithChildren) => {
   const CURRENT_USER = useMemo(
     () => ({
       id: USER_ID,
-      name: process.env.NEXT_PUBLIC_USER_NAME ?? userIdToUserName(USER_ID),
+      name: process.env.NEXT_PUBLIC_USER_NAME ?? userIdToName(USER_ID),
       token: process.env.NEXT_PUBLIC_USER_TOKEN
         ? process.env.NEXT_PUBLIC_USER_TOKEN
         : process.env.NEXT_PUBLIC_TOKEN_URL

sample-apps/react-demo/app/bookmarks/page.tsx

@@ -66,7 +66,7 @@ export default function Bookmarks() {
         <>
           <ul className="w-full list">
             {bookmarks.map((bookmark) => (
-              <li className="list-row" key={bookmark.activity.id}>
+              <li className="list-row w-full flex flex-row justify-stretch items-stretch" key={bookmark.activity.id}>
                 <ActivityPreview
                   activity={bookmark.activity}
                 />

sample-apps/react-demo/app/components/activity/ActivityList.tsx

@@ -1,8 +1,81 @@
+import { useCallback, useEffect, useRef, useState } from 'react';
 import { useFeedActivities, useFeedContext } from '@stream-io/feeds-react-sdk';
 import { Activity } from './Activity';
 import { ErrorCard } from '../utility/ErrorCard';
 import { LoadingIndicator } from '../utility/LoadingIndicator';
 
+const findScrollContainer = (element: HTMLElement | null): HTMLElement | null => {
+  if (!element) return null;
+  let current: HTMLElement | null = element;
+  while (current && current !== document.body) {
+    const style = getComputedStyle(current);
+    if (
+      (style.overflowY === 'auto' || style.overflowY === 'scroll') &&
+      current.scrollHeight > current.clientHeight
+    ) {
+      return current;
+    }
+    current = current.parentElement;
+  }
+  // Fall back to checking document
+  if (document.documentElement.scrollHeight > window.innerHeight) {
+    return document.documentElement;
+  }
+  return null;
+};
+
+const useInfiniteScroll = ({
+  loadNextPage,
+  hasNextPage,
+  isLoading,
+}: {
+  loadNextPage: () => void;
+  hasNextPage: boolean;
+  isLoading: boolean;
+}) => {
+  const sentinelRef = useRef<HTMLDivElement>(null);
+  const listRef = useRef<HTMLUListElement>(null);
+  const [canScroll, setCanScroll] = useState(false);
+
+  const checkCanScroll = useCallback(() => {
+    const scrollContainer = findScrollContainer(listRef.current);
+    setCanScroll(scrollContainer !== null);
+  }, []);
+
+  useEffect(() => {
+    checkCanScroll();
+    window.addEventListener('resize', checkCanScroll);
+    return () => window.removeEventListener('resize', checkCanScroll);
+  }, [checkCanScroll]);
+
+  useEffect(() => {
+    checkCanScroll();
+  });
+
+  useEffect(() => {
+    if (!canScroll || !hasNextPage || isLoading) return;
+
+    const sentinel = sentinelRef.current;
+    if (!sentinel) return;
+
+    const scrollContainer = findScrollContainer(listRef.current);
+
+    const observer = new IntersectionObserver(
+      (entries) => {
+        if (entries[0].isIntersecting && hasNextPage && !isLoading) {
+          loadNextPage();
+        }
+      },
+      { root: scrollContainer === document.documentElement ? null : scrollContainer, rootMargin: '200px' }
+    );
+
+    observer.observe(sentinel);
+    return () => observer.disconnect();
+  }, [canScroll, hasNextPage, isLoading, loadNextPage]);
+
+  return { sentinelRef, listRef, canScroll };
+};
+
 export const ActivityList = ({
   location,
   error,
@@ -14,6 +87,12 @@ export const ActivityList = ({
   const { activities, loadNextPage, has_next_page, is_loading } =
     useFeedActivities();
 
+  const { sentinelRef, listRef, canScroll } = useInfiniteScroll({
+    loadNextPage,
+    hasNextPage: has_next_page ?? false,
+    isLoading: is_loading ?? false,
+  });
+
   if (error) {
     return <ErrorCard message="Failed to load feed" error={error} />;
   }
@@ -35,7 +114,7 @@ export const ActivityList = ({
         </div>
       ) : (
         <>
-          <ul className="list w-full">
+          <ul ref={listRef} className="list w-full">
             {activities?.map((activity) => (
               <li className="list-row w-full px-0 flex flex-row justify-stretch items-stretch" key={activity.id}>
                 <Activity
@@ -45,11 +124,13 @@ export const ActivityList = ({
               </li>
             ))}
           </ul>
-          {has_next_page && (
+          {has_next_page && !canScroll && (
             <button className="btn btn-soft btn-primary" onClick={loadNextPage}>
               {is_loading ? <LoadingIndicator /> : 'Load more'}
             </button>
           )}
+          {has_next_page && canScroll && <div ref={sentinelRef} className="h-1" />}
+          {is_loading && canScroll && <LoadingIndicator />}
         </>
       )}
     </div>

sample-apps/react-demo/app/components/activity/ActivityPreview.tsx

@@ -8,7 +8,7 @@ export const ActivityPreview = ({
   activity: ActivityResponse;
 }) => {
   return (
-    <NavLink href={`/activity/${activity.id}`}>
+    <NavLink className="w-full" href={`/activity/${activity.id}`}>
       <Activity activity={activity} location="preview" />
     </NavLink>
   );

sample-apps/react-demo/app/components/activity/activity-interactions/ReplyToActivity.tsx

@@ -1,8 +1,10 @@
-import type { ActivityResponse } from '@stream-io/feeds-react-sdk';
+import { StreamFeed, type ActivityResponse } from '@stream-io/feeds-react-sdk';
 import { useCallback, useRef, useState } from 'react';
 import { ActivityComposer } from '../ActivityComposer';
+import { useOwnFeedsContext } from '@/app/own-feeds-context';
 
 export const ReplyToActivity = ({ activity }: { activity: ActivityResponse }) => {
+  const { ownFeed } = useOwnFeedsContext();
   const [isOpen, setIsOpen] = useState(false);
   const dialogRef = useRef<HTMLDialogElement>(null);
 
@@ -41,7 +43,9 @@ export const ReplyToActivity = ({ activity }: { activity: ActivityResponse }) =>
               <span className="material-symbols-outlined">close</span>
             </button>
           </div>
-          {isOpen && <ActivityComposer parent={activity} onSave={closeDialog} />}
+          {isOpen && ownFeed && <StreamFeed feed={ownFeed}>
+            <ActivityComposer parent={activity} onSave={closeDialog} />
+          </StreamFeed>}
         </div>
         <form method="dialog" className="modal-backdrop">
           <button>close</button>

sample-apps/react-demo/app/components/activity/activity-interactions/ToggleBookmark.tsx

@@ -2,7 +2,7 @@ import {
   type ActivityResponse,
   useFeedsClient,
 } from '@stream-io/feeds-react-sdk';
-import { useCallback } from 'react';
+import { startTransition, useCallback, useOptimistic, useState } from 'react';
 import { ActionButton } from '../../utility/ActionButton';
 
 export const ToggleBookmark = ({
@@ -11,25 +11,50 @@ export const ToggleBookmark = ({
   activity: ActivityResponse;
 }) => {
   const client = useFeedsClient();
+  const [inProgress, setInProgress] = useState(false);
+  const [error, setError] = useState<Error | undefined>(undefined);
 
-  const toggleBookmark = useCallback(
-    () =>
-      activity.own_bookmarks?.length > 0
-        ? client?.deleteBookmark({
+  const isBookmarked = (activity.own_bookmarks?.length ?? 0) > 0;
+  const bookmarkCount = activity.bookmark_count ?? 0;
+
+  const [state, setState] = useOptimistic(
+    { isBookmarked, bookmarkCount },
+    (_, newState: { isBookmarked: boolean; bookmarkCount: number }) => newState,
+  );
+
+  const toggleBookmark = useCallback(() => {
+    setInProgress(true);
+    setError(undefined);
+
+    startTransition(async () => {
+      try {
+        if (isBookmarked) {
+          setState({ isBookmarked: false, bookmarkCount: bookmarkCount - 1 });
+          await client?.deleteBookmark({
             activity_id: activity.id,
-          })
-        : client?.addBookmark({
+          });
+        } else {
+          setState({ isBookmarked: true, bookmarkCount: bookmarkCount + 1 });
+          await client?.addBookmark({
             activity_id: activity.id,
-          }),
-    [client, activity.id, activity.own_bookmarks],
-  );
+          });
+        }
+      } catch (e) {
+        setError(e as Error);
+      } finally {
+        setInProgress(false);
+      }
+    });
+  }, [client, activity.id, isBookmarked, bookmarkCount, setState]);
 
   return (
     <ActionButton
       onClick={toggleBookmark}
       icon="bookmark"
-      label={activity.bookmark_count.toString()}
-      isActive={activity.own_bookmarks?.length > 0}
+      disabled={inProgress}
+      label={state.bookmarkCount.toString()}
+      isActive={state.isBookmarked}
+      error={error}
     />
   );
 };

sample-apps/react-demo/app/components/activity/activity-interactions/ToggleReaction.tsx

@@ -1,6 +1,6 @@
 import type { ActivityResponse } from '@stream-io/feeds-react-sdk';
 import { useFeedsClient } from '@stream-io/feeds-react-sdk';
-import { useCallback } from 'react';
+import { startTransition, useCallback, useOptimistic, useState } from 'react';
 import { ActionButton } from '../../utility/ActionButton';
 
 export const ToggleReaction = ({
@@ -9,29 +9,54 @@ export const ToggleReaction = ({
   activity: ActivityResponse;
 }) => {
   const client = useFeedsClient();
+  const [inProgress, setInProgress] = useState(false);
+  const [error, setError] = useState<Error | undefined>(undefined);
 
-  const toggleReaction = useCallback(
-    () =>
-      activity.own_reactions?.length > 0
-        ? client?.deleteActivityReaction({
-          activity_id: activity.id,
-          type: 'like',
-          delete_notification_activity: true,
-        })
-        : client?.addActivityReaction({
-          activity_id: activity.id,
-          type: 'like',
-          create_notification_activity: true,
-        }),
-    [client, activity.id, activity.own_reactions],
+  const isLiked = activity.own_reactions?.length > 0;
+  const likeCount = activity.reaction_groups.like?.count ?? 0;
+
+  const [state, setState] = useOptimistic(
+    { isLiked, likeCount },
+    (_, newState: { isLiked: boolean; likeCount: number }) => newState,
   );
 
+  const toggleReaction = useCallback(() => {
+    setInProgress(true);
+    setError(undefined);
+
+    startTransition(async () => {
+      try {
+        if (isLiked) {
+          setState({ isLiked: false, likeCount: likeCount - 1 });
+          await client?.deleteActivityReaction({
+            activity_id: activity.id,
+            type: 'like',
+            delete_notification_activity: true,
+          });
+        } else {
+          setState({ isLiked: true, likeCount: likeCount + 1 });
+          await client?.addActivityReaction({
+            activity_id: activity.id,
+            type: 'like',
+            create_notification_activity: true,
+          });
+        }
+      } catch (e) {
+        setError(e as Error);
+      } finally {
+        setInProgress(false);
+      }
+    });
+  }, [client, activity.id, isLiked, likeCount, setState]);
+
   return (
     <ActionButton
       onClick={toggleReaction}
       icon="favorite"
-      label={(activity.reaction_groups.like?.count ?? 0).toString()}
-      isActive={activity.own_reactions?.length > 0}
+      disabled={inProgress}
+      label={state.likeCount.toString()}
+      isActive={state.isLiked}
+      error={error}
     />
   );
 };