Function useDmSidebarMetadata

desktop/src/features/sidebar/useDmSidebarMetadata.ts:10–146

({
  currentPubkey,
  directMessages,
  fallbackDisplayName,
  profileDisplayName,
  enabled = true,
}: {
  currentPubkey?: string;
  directMessages: Channel[];
  fallbackDisplayName?: string;
  profileDisplayName?: string | null;
  enabled?: boolean;
})

import type { Channel, PresenceStatus } from "@/shared/api/types";

export function useDmSidebarMetadata({
  currentPubkey,
  directMessages,
  fallbackDisplayName,
  profileDisplayName,
  enabled = true,
}: {
  currentPubkey?: string;
  directMessages: Channel[];
  fallbackDisplayName?: string;
  profileDisplayName?: string | null;
  enabled?: boolean;
}) {
  const selfDmLabels = React.useMemo(
    () =>
      new Set(
        [profileDisplayName, fallbackDisplayName]
          .map((value) => value?.trim().toLowerCase())
          .filter((value): value is string => Boolean(value)),
      ),
    [fallbackDisplayName, profileDisplayName],
  );
  const dmParticipantPubkeys = React.useMemo(
    () =>
      directMessages.flatMap((channel) =>
        channel.participantPubkeys.filter((pubkey, index) => {
          const normalizedPubkey = pubkey.toLowerCase();
          if (normalizedPubkey === currentPubkey?.toLowerCase()) {
            return false;
          }

          const participantLabel =
            channel.participants[index]?.trim().toLowerCase() ?? null;
          return !participantLabel || !selfDmLabels.has(participantLabel);
        }),
      ),
    [currentPubkey, directMessages, selfDmLabels],
  );
  const dmPresenceQuery = usePresenceQuery(dmParticipantPubkeys, {
    enabled: enabled && directMessages.length > 0,
  });
  const dmProfilesQuery = useUsersBatchQuery(dmParticipantPubkeys, {
    enabled: enabled && directMessages.length > 0,
  });
  const dmProfiles = dmProfilesQuery.data?.profiles;
  const dmPresenceByChannelId = React.useMemo(
    () =>
      Object.fromEntries(
        directMessages.map((channel) => {
          const otherParticipantPubkey = channel.participantPubkeys.find(
            (pubkey, index) => {
              const normalizedPubkey = pubkey.toLowerCase();
              if (normalizedPubkey === currentPubkey?.toLowerCase()) {
                return false;
              }

              const participantLabel =
                channel.participants[index]?.trim().toLowerCase() ?? null;