fix(app): invite member & presence counts (#59)

fluxer_app/src/components/channel/InviteEmbed.tsx

@@ -42,7 +42,6 @@ import {Tooltip} from '~/components/uikit/Tooltip/Tooltip';
 import {ComponentDispatch} from '~/lib/ComponentDispatch';
 import {Routes} from '~/Routes';
 import {UserRecord} from '~/records/UserRecord';
-import ChannelStore from '~/stores/ChannelStore';
 import GuildMemberStore from '~/stores/GuildMemberStore';
 import GuildStore from '~/stores/GuildStore';
 import InviteStore from '~/stores/InviteStore';
@@ -51,6 +50,7 @@ import UserStore from '~/stores/UserStore';
 
 import {isGroupDmInvite, isGuildInvite, isPackInvite as isPackInviteGuard} from '~/types/InviteTypes';
 import * as AvatarUtils from '~/utils/AvatarUtils';
+import {getGroupDmInviteCounts} from '~/utils/invite/GroupDmInviteCounts';
 import {
 	GuildInvitePrimaryAction,
 	getGuildInviteActionState,
@@ -58,7 +58,6 @@ import {
 	isGuildInviteActionDisabled,
 } from '~/utils/invite/GuildInviteActionState';
 import * as RouterUtils from '~/utils/RouterUtils';
-
 import {getGroupDMTitle, getGuildEmbedSplashAspectRatio, getImageAspectRatioFromBase64} from './InviteEmbed/utils';
 import styles from './InviteEmbed.module.css';
 
@@ -146,8 +145,12 @@ export const InviteEmbed = observer(function InviteEmbed({code}: InviteEmbedProp
 		const groupDMPath = Routes.dmChannel(invite.channel.id);
 		const handleAcceptInvite = () => InviteActionCreators.acceptAndTransitionToChannel(invite.code, i18n);
 		const handleNavigateToGroup = () => RouterUtils.transitionTo(groupDMPath);
-		const isAlreadyInGroupDM = !!ChannelStore.getChannel(invite.channel.id);
-		const memberCount = invite.member_count ?? 0;
+		const groupDMCounts = getGroupDmInviteCounts({
+			channelId: invite.channel.id,
+			inviteMemberCount: invite.member_count,
+		});
+		const isAlreadyInGroupDM = groupDMCounts.hasLocalChannel;
+		const memberCount = groupDMCounts.memberCount;
 
 		return (
 			<EmbedCard

fluxer_app/src/components/modals/InviteAcceptModal.tsx

@@ -32,6 +32,7 @@ import foodPatternUrl from '~/images/i-like-food.svg';
 import InviteStore from '~/stores/InviteStore';
 import {isGroupDmInvite, isGuildInvite, isPackInvite as isPackInviteGuard} from '~/types/InviteTypes';
 import * as AvatarUtils from '~/utils/AvatarUtils';
+import {getGroupDmInviteCounts} from '~/utils/invite/GroupDmInviteCounts';
 import {
 	GuildInvitePrimaryAction,
 	getGuildInviteActionState,
@@ -57,6 +58,13 @@ export const InviteAcceptModal = observer(function InviteAcceptModal({code}: Inv
 	}, [code, inviteState]);
 
 	const isGroupDM = invite != null && isGroupDmInvite(invite);
+	const groupDMCounts =
+		invite && isGroupDM
+			? getGroupDmInviteCounts({
+					channelId: invite.channel.id,
+					inviteMemberCount: invite.member_count,
+				})
+			: null;
 	const isPackInvite = invite != null && isPackInviteGuard(invite);
 
 	const guildActionState = getGuildInviteActionState({invite});
@@ -64,12 +72,18 @@ export const InviteAcceptModal = observer(function InviteAcceptModal({code}: Inv
 
 	const inviteForHeader = React.useMemo(() => {
 		if (!invite) return null;
+		if (isGroupDM && groupDMCounts) {
+			return {
+				...invite,
+				member_count: groupDMCounts.memberCount,
+			};
+		}
 		return {
 			...invite,
 			presence_count: presenceCount,
 			member_count: memberCount,
 		};
-	}, [invite, presenceCount, memberCount]);
+	}, [invite, isGroupDM, presenceCount, memberCount, groupDMCounts?.memberCount]);
 
 	const splashUrl = React.useMemo(() => {
 		if (!invite || !isGuildInvite(invite)) {

fluxer_app/src/utils/invite/GroupDmInviteCounts.ts

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import AuthenticationStore from '~/stores/AuthenticationStore';
+import ChannelStore from '~/stores/ChannelStore';
+
+export interface GroupDmInviteCounts {
+	memberCount: number;
+	hasLocalChannel: boolean;
+}
+
+export const getGroupDmInviteCounts = (params: {
+	channelId: string;
+	inviteMemberCount?: number | null;
+}): GroupDmInviteCounts => {
+	const channel = ChannelStore.getChannel(params.channelId);
+	if (!channel) {
+		return {
+			memberCount: params.inviteMemberCount ?? 0,
+			hasLocalChannel: false,
+		};
+	}
+
+	const memberIds = new Set(channel.recipientIds);
+	const currentUserId = AuthenticationStore.currentUserId;
+	if (currentUserId) {
+		memberIds.add(currentUserId);
+	}
+
+	return {
+		memberCount: memberIds.size,
+		hasLocalChannel: true,
+	};
+};

fluxer_app/src/utils/invite/GuildInviteActionState.ts

@@ -22,7 +22,6 @@ import type {Guild, GuildRecord} from '~/records/GuildRecord';
 import type {Invite} from '~/records/MessageRecord';
 import AuthenticationStore from '~/stores/AuthenticationStore';
 import GuildMemberStore from '~/stores/GuildMemberStore';
-import PresenceStore from '~/stores/PresenceStore';
 import {isGuildInvite} from '~/types/InviteTypes';
 
 const normalizeFeatures = (features?: Iterable<string> | null): Array<string> => {
@@ -55,18 +54,8 @@ export const getGuildInviteActionState = (params: {
 	const guildId = guildRecord?.id ?? null;
 	const currentUserId = AuthenticationStore.currentUserId;
 	const isMember = Boolean(guildId && currentUserId && GuildMemberStore.getMember(guildId, currentUserId));
-	const presenceCount =
-		guildId && isMember
-			? PresenceStore.getPresenceCount(guildId)
-			: params.invite && isGuildInvite(params.invite)
-				? params.invite.presence_count
-				: 0;
-	const memberCount =
-		guildId && isMember
-			? GuildMemberStore.getMemberCount(guildId)
-			: params.invite && isGuildInvite(params.invite)
-				? params.invite.member_count
-				: 0;
+	const presenceCount = params.invite && isGuildInvite(params.invite) ? (params.invite.presence_count ?? 0) : 0;
+	const memberCount = params.invite && isGuildInvite(params.invite) ? (params.invite.member_count ?? 0) : 0;
 	const features = normalizeFeatures(guildRecord?.features ?? inviteGuild?.features);
 
 	return {