improve community explore view

src/views/communities/components/community-card.tsx

@@ -1,9 +1,8 @@
 import { memo, useRef } from "react";
-import { Kind, nip19 } from "nostr-tools";
+import { nip19 } from "nostr-tools";
 import { Link as RouterLink } from "react-router-dom";
 import {
   Card,
-  CardBody,
   CardFooter,
   CardHeader,
   CardProps,
@@ -20,14 +19,13 @@ import { NostrEvent } from "../../../types/nostr-event";
 import { useRegisterIntersectionEntity } from "../../../providers/intersection-observer";
 import { getEventUID } from "../../../helpers/nostr/events";
 import { getCommunityImage, getCommunityName } from "../../../helpers/nostr/communities";
-import CommunityDescription from "./community-description";
-import useCountCommunityPosts from "../hooks/use-count-community-post";
 import UserAvatarLink from "../../../components/user-avatar-link";
 import { UserLink } from "../../../components/user-link";
 import useCountCommunityMembers from "../../../hooks/use-count-community-members";
 import { readablizeSats } from "../../../helpers/bolt11";
-import { CommunityIcon } from "../../../components/icons";
 import User01 from "../../../components/icons/user-01";
+import useReplaceableEvent from "../../../hooks/use-replaceable-event";
+import { AddressPointer } from "nostr-tools/lib/types/nip19";
 
 function CommunityCard({ community, ...props }: Omit<CardProps, "children"> & { community: NostrEvent }) {
   const ref = useRef<HTMLDivElement | null>(null);
@@ -81,4 +79,10 @@ function CommunityCard({ community, ...props }: Omit<CardProps, "children"> & {
   );
 }
 
+export function PointerCommunityCard({ pointer, ...props }: Omit<CardProps, "children"> & { pointer: AddressPointer }) {
+  const community = useReplaceableEvent(pointer);
+  if (!community) return <span>Loading {pointer.identifier}</span>;
+  return <CommunityCard community={community} {...props} />;
+}
+
 export default memo(CommunityCard);

src/views/communities/explore.tsx

@@ -1,69 +1,107 @@
-import { useCallback, useMemo } from "react";
-import { Flex, SimpleGrid } from "@chakra-ui/react";
+import { useMemo } from "react";
+import { AvatarGroup, Button, Flex, Switch, useDisclosure } from "@chakra-ui/react";
 
 import PeopleListProvider, { usePeopleListContext } from "../../providers/people-list-provider";
 import PeopleListSelection from "../../components/people-list-selection/people-list-selection";
-import useTimelineLoader from "../../hooks/use-timeline-loader";
-import IntersectionObserverProvider from "../../providers/intersection-observer";
-import { useTimelineCurserIntersectionCallback } from "../../hooks/use-timeline-cursor-intersection-callback";
-import useSubject from "../../hooks/use-subject";
-import CommunityCard from "./components/community-card";
-import { getEventUID } from "../../helpers/nostr/events";
+import { PointerCommunityCard } from "./components/community-card";
 import VerticalPageLayout from "../../components/vertical-page-layout";
-import RelaySelectionButton from "../../components/relay-selection/relay-selection-button";
-import RelaySelectionProvider, { useRelaySelectionContext } from "../../providers/relay-selection-provider";
-import { COMMUNITY_DEFINITION_KIND, validateCommunity } from "../../helpers/nostr/communities";
-import { NostrEvent } from "../../types/nostr-event";
-import { NostrQuery } from "../../types/nostr-query";
+import { COMMUNITY_DEFINITION_KIND, SUBSCRIBED_COMMUNITIES_LIST_IDENTIFIER } from "../../helpers/nostr/communities";
 import { ErrorBoundary } from "../../components/error-boundary";
+import { useReadRelayUrls } from "../../hooks/use-client-relays";
+import useSubjects from "../../hooks/use-subjects";
+import replaceableEventLoaderService from "../../services/replaceable-event-requester";
+import { NOTE_LIST_KIND, getCoordinatesFromList } from "../../helpers/nostr/lists";
+import { useNavigate } from "react-router-dom";
+import { ChevronLeftIcon } from "../../components/icons";
+import { parseCoordinate } from "../../helpers/nostr/events";
+import UserAvatarLink from "../../components/user-avatar-link";
+import { AddressPointer } from "nostr-tools/lib/types/nip19";
+
+export function useUsersJoinedCommunitiesLists(pubkeys: string[], additionalRelays: string[] = []) {
+  const readRelays = useReadRelayUrls(additionalRelays);
+  const muteListSubjects = useMemo(() => {
+    return pubkeys.map((pubkey) =>
+      replaceableEventLoaderService.requestEvent(
+        readRelays,
+        NOTE_LIST_KIND,
+        pubkey,
+        SUBSCRIBED_COMMUNITIES_LIST_IDENTIFIER,
+      ),
+    );
+  }, [pubkeys]);
+  return useSubjects(muteListSubjects);
+}
+
+function CommunityCardWithMembers({ pointer, pubkeys }: { pointer: AddressPointer; pubkeys: string[] }) {
+  return (
+    <ErrorBoundary>
+      <Flex direction="column" gap="2">
+        <AvatarGroup size="md">
+          {pubkeys.map((pubkey) => (
+            <UserAvatarLink key={pubkey} pubkey={pubkey} />
+          ))}
+        </AvatarGroup>
+        <PointerCommunityCard pointer={pointer} maxW="xl" />
+      </Flex>
+    </ErrorBoundary>
+  );
+}
 
 function CommunitiesExplorePage() {
-  const { filter, listId } = usePeopleListContext();
-  const { relays } = useRelaySelectionContext();
+  const navigate = useNavigate();
+  const { people } = usePeopleListContext();
+  const showMore = useDisclosure();
 
-  const eventFilter = useCallback((event: NostrEvent) => {
-    return validateCommunity(event);
-  }, []);
+  const communitiesLists = useUsersJoinedCommunitiesLists(people?.map((p) => p.pubkey) ?? []);
 
-  const query = useMemo(() => {
-    const base: NostrQuery = { kinds: [COMMUNITY_DEFINITION_KIND] };
-    if (filter?.authors) {
-      base.authors = filter.authors;
-      base["#p"] = filter.authors;
+  const communityPointers = useMemo(() => {
+    const dir = new Map<string, { pointer: AddressPointer; pubkeys: string[] }>();
+    for (const list of communitiesLists) {
+      for (const { coordinate } of getCoordinatesFromList(list)) {
+        const pointer = parseCoordinate(coordinate, true);
+        if (!pointer) continue;
+        if (pointer.kind === COMMUNITY_DEFINITION_KIND) {
+          if (dir.has(coordinate)) {
+            dir.get(coordinate)?.pubkeys.push(list.pubkey);
+          } else dir.set(coordinate, { pointer, pubkeys: [list.pubkey] });
+        }
+      }
     }
-    return base;
-  }, [filter]);
+    return dir;
+  }, [communitiesLists]);
 
-  const timeline = useTimelineLoader(`${listId}-browse-communities`, relays, query, { enabled: !!filter, eventFilter });
-
-  const communities = useSubject(timeline.timeline);
-  const callback = useTimelineCurserIntersectionCallback(timeline);
+  const sorted = Array.from(communityPointers.values()).sort((a, b) => b.pubkeys.length - a.pubkeys.length);
 
   return (
-    <IntersectionObserverProvider callback={callback}>
-      <VerticalPageLayout>
-        <Flex gap="2" alignItems="center" wrap="wrap">
-          <PeopleListSelection />
-          <RelaySelectionButton />
-        </Flex>
-        <SimpleGrid spacing="2" columns={{ base: 1, lg: 2 }}>
-          {communities.map((event) => (
-            <ErrorBoundary>
-              <CommunityCard key={getEventUID(event)} community={event} />
-            </ErrorBoundary>
+    <VerticalPageLayout>
+      <Flex gap="2" alignItems="center" wrap="wrap">
+        <Button onClick={() => navigate(-1)} leftIcon={<ChevronLeftIcon />}>
+          Back
+        </Button>
+        <PeopleListSelection hideGlobalOption />
+        <Switch onChange={showMore.onToggle} checked={showMore.isOpen}>
+          Show More
+        </Switch>
+      </Flex>
+      <Flex gap="4" direction="column">
+        {sorted
+          .filter((c) => (showMore ? c.pubkeys.length > 1 : true))
+          .map(({ pointer, pubkeys }) => (
+            <CommunityCardWithMembers
+              key={pointer.kind + pointer.pubkey + pointer.identifier}
+              pointer={pointer}
+              pubkeys={pubkeys}
+            />
           ))}
-        </SimpleGrid>
-      </VerticalPageLayout>
-    </IntersectionObserverProvider>
+      </Flex>
+    </VerticalPageLayout>
   );
 }
 
 export default function ExploreCommunitiesView() {
   return (
-    <PeopleListProvider initList="global">
-      <RelaySelectionProvider>
-        <CommunitiesExplorePage />
-      </RelaySelectionProvider>
+    <PeopleListProvider>
+      <CommunitiesExplorePage />
     </PeopleListProvider>
   );
 }

src/views/communities/index.tsx

@@ -1,22 +1,12 @@
 import { Button, Center, Flex, Heading, Link, SimpleGrid, Text } from "@chakra-ui/react";
 import { Link as RouterLink } from "react-router-dom";
 import { Navigate } from "react-router-dom";
-import { nip19 } from "nostr-tools";
 
 import VerticalPageLayout from "../../components/vertical-page-layout";
 import { ErrorBoundary } from "../../components/error-boundary";
 import useSubscribedCommunitiesList from "../../hooks/use-subscribed-communities-list";
 import { useCurrentAccount } from "../../hooks/use-current-account";
-import { EmbedEventPointer } from "../../components/embed-event";
-import { AddressPointer } from "nostr-tools/lib/types/nip19";
-import useReplaceableEvent from "../../hooks/use-replaceable-event";
-import CommunityCard from "./components/community-card";
-
-function LoadCommunityCard({ pointer }: { pointer: AddressPointer }) {
-  const community = useReplaceableEvent(pointer);
-  if (!community) return <span>Loading {pointer.identifier}</span>;
-  return <CommunityCard community={community} />;
-}
+import { PointerCommunityCard } from "./components/community-card";
 
 function CommunitiesHomePage() {
   const account = useCurrentAccount()!;
@@ -33,7 +23,7 @@ function CommunitiesHomePage() {
         <SimpleGrid spacing="2" columns={{ base: 1, lg: 2 }}>
           {communities.map((pointer) => (
             <ErrorBoundary key={pointer.kind + pointer.pubkey + pointer.identifier}>
-              <LoadCommunityCard pointer={pointer} />
+              <PointerCommunityCard pointer={pointer} />
             </ErrorBoundary>
           ))}
         </SimpleGrid>