From 540f29dd697f72f405692628ddbd85d18582c385 Mon Sep 17 00:00:00 2001
From: Kieran <kieran@harkin.me>
Date: Mon, 13 Nov 2023 15:58:14 +0000
Subject: [PATCH] feat: hashtags header

---
 packages/app/src/Cache/FollowsFeed.ts         |  2 +-
 .../app/src/Element/Feed/TimelineFollows.tsx  | 22 +++--
 packages/app/src/Element/Text.css             |  4 +
 packages/app/src/Pages/HashTagsPage.tsx       | 97 ++++++++++++-------
 packages/system/src/event-kind.ts             |  1 -
 5 files changed, 82 insertions(+), 44 deletions(-)

diff --git a/packages/app/src/Cache/FollowsFeed.ts b/packages/app/src/Cache/FollowsFeed.ts
index 46e44737..a4e58136 100644
--- a/packages/app/src/Cache/FollowsFeed.ts
+++ b/packages/app/src/Cache/FollowsFeed.ts
@@ -47,7 +47,7 @@ export class FollowsFeedCache extends RefreshFeedCache<TaggedNostrEvent> {
     const keys = (await this.table?.toCollection().primaryKeys()) ?? [];
     this.onTable = new Set<string>(keys.map(a => a as string));
 
-    // load only latest 10 posts, rest can be loaded on-demand
+    // load only latest 50 posts, rest can be loaded on-demand
     const latest = await this.table?.orderBy("created_at").reverse().limit(50).toArray();
     latest?.forEach(v => this.cache.set(this.key(v), v));
 
diff --git a/packages/app/src/Element/Feed/TimelineFollows.tsx b/packages/app/src/Element/Feed/TimelineFollows.tsx
index 79774c3a..bfde55f8 100644
--- a/packages/app/src/Element/Feed/TimelineFollows.tsx
+++ b/packages/app/src/Element/Feed/TimelineFollows.tsx
@@ -12,6 +12,7 @@ import useLogin from "Hooks/useLogin";
 import { TimelineFragment, TimelineRenderer } from "./TimelineFragment";
 import useHashtagsFeed from "Feed/HashtagsFeed";
 import { ShowMoreInView } from "Element/Event/ShowMore";
+import { HashTagHeader } from "Pages/HashTagsPage";
 
 export interface TimelineFollowsProps {
   postsOnly: boolean;
@@ -67,6 +68,7 @@ const TimelineFollows = (props: TimelineFollowsProps) => {
     const included = new Set<string>();
     return (mixin.data.data ?? [])
       .filter(a => !mainFeedIds.has(a.id) && postsOnly(a))
+      .filter(a => a.tags.filter(a => a[0] === "t").length < 5)
       .reduce(
         (acc, v) => {
           if (included.has(v.id)) return acc;
@@ -116,9 +118,9 @@ const TimelineFollows = (props: TimelineFollowsProps) => {
         noteOnClick={props.noteOnClick}
         noteRenderer={props.noteRenderer}
       />
-      <ShowMoreInView
+      {sortedFeed.length > 0 && <ShowMoreInView
         onClick={async () => await FollowsFeed.loadMore(system, login, sortedFeed[sortedFeed.length - 1].created_at)}
-      />
+      />}
     </>
   );
 };
@@ -129,28 +131,32 @@ function weaveTimeline(
   hashtags: Record<string, Array<TaggedNostrEvent>>,
 ): Array<TimelineFragment> {
   // always skip 5 posts from start to avoid heavy handed weaving
-  const skip = 5;
+  let skip = 5;
 
   if (main.length < skip) {
-    return [{ events: main, refTime: unixNow() }];
+    skip = Math.min(skip, main.length - 1);
   }
 
   const frags = Object.entries(hashtags).map(([k, v]) => {
     const take = v.slice(0, 5);
     return {
       title: (
-        <div className="flex bb p">
-          <h2>#{k}</h2>
+        <div className="bb p">
+          <HashTagHeader tag={k} />
         </div>
       ),
       events: take,
       refTime: Math.min(
-        main[skip].created_at,
+        main.at(skip)?.created_at ?? unixNow(),
         take.reduce((acc, v) => (acc > v.created_at ? acc : v.created_at), 0),
       ),
     } as TimelineFragment;
   });
 
+  if (main.length === 0) {
+    return frags;
+  }
+
   return [
     {
       events: main.slice(0, skip),
@@ -162,4 +168,4 @@ function weaveTimeline(
       refTime: main[skip].created_at,
     },
   ].sort((a, b) => (a.refTime > b.refTime ? -1 : 1));
-}
+}
\ No newline at end of file
diff --git a/packages/app/src/Element/Text.css b/packages/app/src/Element/Text.css
index 4448d84c..6710d669 100644
--- a/packages/app/src/Element/Text.css
+++ b/packages/app/src/Element/Text.css
@@ -39,6 +39,10 @@
   margin-right: auto;
 }
 
+.text iframe[src*="youtube.com"] {
+  aspect-ratio: 16/9;
+}
+
 .gallery {
   grid-template-columns: repeat(4, 1fr);
   gap: 2px;
diff --git a/packages/app/src/Pages/HashTagsPage.tsx b/packages/app/src/Pages/HashTagsPage.tsx
index 40e41ac8..78bcc837 100644
--- a/packages/app/src/Pages/HashTagsPage.tsx
+++ b/packages/app/src/Pages/HashTagsPage.tsx
@@ -1,51 +1,25 @@
 import { useMemo } from "react";
 import { useParams } from "react-router-dom";
-import { FormattedMessage } from "react-intl";
-import { NostrHashtagLink } from "@snort/system";
+import { FormattedMessage, FormattedNumber } from "react-intl";
+import { EventKind, NostrHashtagLink, NoteCollection, RequestBuilder } from "@snort/system";
+import { dedupe } from "@snort/shared";
+import { useRequestBuilder } from "@snort/system-react";
 
 import Timeline from "Element/Feed/Timeline";
 import useEventPublisher from "Hooks/useEventPublisher";
 import useLogin from "Hooks/useLogin";
 import { setTags } from "Login";
+import AsyncButton from "Element/AsyncButton";
+import ProfileImage from "Element/User/ProfileImage";
 
 const HashTagsPage = () => {
   const params = useParams();
   const tag = (params.tag ?? "").toLowerCase();
-  const login = useLogin();
-  const isFollowing = useMemo(() => {
-    return login.tags.item.includes(tag);
-  }, [login, tag]);
-  const { publisher, system } = useEventPublisher();
-
-  async function followTags(ts: string[]) {
-    if (publisher) {
-      const ev = await publisher.bookmarks(
-        ts.map(a => new NostrHashtagLink(a)),
-        "follow",
-      );
-      system.BroadcastEvent(ev);
-      setTags(login, ts, ev.created_at * 1000);
-    }
-  }
 
   return (
     <>
-      <div className="main-content p">
-        <div className="action-heading">
-          <h2>#{tag}</h2>
-          {isFollowing ? (
-            <button
-              type="button"
-              className="secondary"
-              onClick={() => followTags(login.tags.item.filter(t => t !== tag))}>
-              <FormattedMessage defaultMessage="Unfollow" />
-            </button>
-          ) : (
-            <button type="button" onClick={() => followTags(login.tags.item.concat([tag]))}>
-              <FormattedMessage defaultMessage="Follow" />
-            </button>
-          )}
-        </div>
+      <div className="bb p">
+        <HashTagHeader tag={tag} />
       </div>
       <Timeline
         key={tag}
@@ -58,3 +32,58 @@ const HashTagsPage = () => {
 };
 
 export default HashTagsPage;
+
+
+
+export function HashTagHeader({ tag }: { tag: string }) {
+  const login = useLogin();
+  const isFollowing = useMemo(() => {
+    return login.tags.item.includes(tag);
+  }, [login, tag]);
+  const { publisher, system } = useEventPublisher();
+
+  async function followTags(ts: string[]) {
+    if (publisher) {
+      const ev = await publisher.bookmarks(
+        ts.map(a => new NostrHashtagLink(a)),
+        "follow",
+      );
+      setTags(login, ts, ev.created_at * 1000);
+      await system.BroadcastEvent(ev);
+    }
+  }
+
+  const sub = useMemo(() => {
+    const rb = new RequestBuilder(`hashtag-counts:${tag}`);
+    rb.withFilter()
+      .kinds([EventKind.CategorizedBookmarks])
+      .tag("d", ["follow"])
+      .tag("t", [tag.toLowerCase()]);
+    return rb;
+  }, [tag]);
+  const followsTag = useRequestBuilder(NoteCollection, sub);
+  const pubkeys = dedupe((followsTag.data ?? []).map(a => a.pubkey));
+
+  return <div className="flex items-center justify-between">
+    <div className="flex flex-col g8">
+      <h2>#{tag}</h2>
+      <div className="flex">
+        {pubkeys.slice(0, 5).map(a => <ProfileImage pubkey={a} showUsername={false} link={""} showFollowingMark={false} size={40} />)}
+        {pubkeys.length > 5 && <span>
+          +<FormattedNumber value={pubkeys.length - 5} />
+        </span>}
+      </div>
+    </div>
+    {isFollowing ? (
+      <AsyncButton
+        className="secondary"
+        onClick={() => followTags(login.tags.item.filter(t => t !== tag))}>
+        <FormattedMessage defaultMessage="Unfollow" />
+      </AsyncButton>
+    ) : (
+      <AsyncButton onClick={() => followTags(login.tags.item.concat([tag]))}>
+        <FormattedMessage defaultMessage="Follow" />
+      </AsyncButton>
+    )}
+  </div>
+}
\ No newline at end of file
diff --git a/packages/system/src/event-kind.ts b/packages/system/src/event-kind.ts
index b286eda1..579c56bc 100644
--- a/packages/system/src/event-kind.ts
+++ b/packages/system/src/event-kind.ts
@@ -31,7 +31,6 @@ enum EventKind {
   CategorizedPeople = 30000, // NIP-51a
   CategorizedBookmarks = 30001, // NIP-51b
 
-  TagLists = 30002, // NIP-51c
   Badge = 30009, // NIP-58
   ProfileBadges = 30008, // NIP-58