nostr-hooks/dist/nip29/queries/use-all-groups-metadata-records/index.js

React hooks for developing Nostr clients

import { useEffect, useMemo } from 'react';
import { useSubscription } from '../../../hooks';
import { useNip29Store } from '../../store';
const updateGroupMetadata = useNip29Store.getState().updateGroupMetadata;
export const useAllGroupsMetadataRecords = (relay) => {
    const subId = relay ? `${relay}-allGroups-metadata` : undefined;
    const allGroups = useNip29Store((state) => (subId ? state.groups[subId] : undefined));
    const metadataRecords = useMemo(() => allGroups
        ? Object.entries(allGroups).reduce((acc, [groupId, group]) => {
            if (group.metadata)
                acc[groupId] = group.metadata;
            return acc;
        }, {})
        : {}, [allGroups]);
    const { events, isLoading, hasMore, createSubscription, loadMore } = useSubscription(subId);
    useEffect(() => {
        if (!relay || !subId)
            return;
        const filters = [{ kinds: [39000], limit: 100 }];
        const relayUrls = [relay];
        const onEvent = (event) => {
            const { dTag: groupId } = event;
            if (!groupId)
                return;
            const name = event.getMatchingTags('name')?.[0]?.[1] || '<unnamed>';
            const picture = event.getMatchingTags('picture')?.[0]?.[1] || '';
            const about = event.getMatchingTags('about')?.[0]?.[1] || '';
            const isOpen = event.getMatchingTags('open').length > 0 ? true : false;
            const isPublic = event.getMatchingTags('public').length > 0 ? true : false;
            const metadata = {
                about,
                isOpen,
                isPublic,
                name,
                picture,
            };
            updateGroupMetadata(subId, groupId, metadata);
        };
        createSubscription({ filters, relayUrls, onEvent });
    }, [subId, relay, createSubscription]);
    return {
        metadataRecords,
        isLoadingMetadata: isLoading,
        metadataEvents: events,
        loadMoreMetadata: loadMore,
        hasMoreMetadata: hasMore,
    };
};
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