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fluxer_app/src/stores/GuildMemberStore.tsx

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+/*
+ * 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 {makeAutoObservable} from 'mobx';
+import {type GuildMember, GuildMemberRecord} from '~/records/GuildMemberRecord';
+import type {GuildReadyData, GuildRecord} from '~/records/GuildRecord';
+import AuthenticationStore from '~/stores/AuthenticationStore';
+import ConnectionStore from '~/stores/ConnectionStore';
+import GuildStore from '~/stores/GuildStore';
+
+type Members = Record<string, GuildMemberRecord>;
+
+interface PendingMemberRequest {
+	resolve: (members: Array<GuildMemberRecord>) => void;
+	reject: (error: Error) => void;
+	members: Array<GuildMemberRecord>;
+	receivedChunks: number;
+	expectedChunks: number;
+}
+
+const MEMBER_REQUEST_TIMEOUT = 30000;
+const MEMBER_NONCE_LENGTH = 32;
+const MEMBER_NONCE_CHARS = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+
+function generateMemberNonce(): string {
+	let nonce = '';
+	const charsLength = MEMBER_NONCE_CHARS.length;
+	for (let i = 0; i < MEMBER_NONCE_LENGTH; i += 1) {
+		nonce += MEMBER_NONCE_CHARS[Math.floor(Math.random() * charsLength)];
+	}
+	return nonce;
+}
+
+class GuildMemberStore {
+	members: Record<string, Members> = {};
+	pendingRequests: Map<string, PendingMemberRequest> = new Map();
+	loadedGuilds: Set<string> = new Set();
+
+	constructor() {
+		makeAutoObservable(this, {}, {autoBind: true});
+	}
+
+	getMember(guildId: string, userId?: string | null): GuildMemberRecord | null {
+		if (!userId) {
+			return null;
+		}
+		return this.members[guildId]?.[userId] ?? null;
+	}
+
+	isUserTimedOut(guildId: string | null, userId?: string | null): boolean {
+		if (!guildId || !userId) {
+			return false;
+		}
+
+		const member = this.getMember(guildId, userId);
+		return member?.isTimedOut() ?? false;
+	}
+
+	getMembers(guildId: string): Array<GuildMemberRecord> {
+		return Object.values(this.members[guildId] ?? {});
+	}
+
+	getMemberCount(guildId: string): number {
+		return Object.keys(this.members[guildId] ?? {}).length;
+	}
+
+	getMutualGuilds(userId: string): Array<GuildRecord> {
+		const currentUserId = AuthenticationStore.currentUserId;
+		if (!currentUserId || !userId || currentUserId === userId) {
+			return [];
+		}
+
+		const guilds = GuildStore.getGuilds();
+
+		return guilds.filter((guild) => {
+			const userIsMember = this.getMember(guild.id, userId) != null;
+			const currentUserIsMember = this.getMember(guild.id, currentUserId) != null;
+			return userIsMember && currentUserIsMember;
+		});
+	}
+
+	handleConnectionOpen(guilds: Array<GuildReadyData>): void {
+		this.members = {};
+		for (const guild of guilds) {
+			this.handleGuildCreate(guild);
+		}
+	}
+
+	handleGuildCreate(guild: GuildReadyData): void {
+		if (guild.unavailable) {
+			return;
+		}
+
+		const ownMember = guild.members.find((m) => m.user.id === AuthenticationStore.currentUserId);
+		this.members = {
+			...this.members,
+			[guild.id]: ownMember ? {[ownMember.user.id]: new GuildMemberRecord(guild.id, ownMember)} : {},
+		};
+	}
+
+	handleGuildDelete(guildId: string): void {
+		this.members = Object.fromEntries(Object.entries(this.members).filter(([id]) => id !== guildId));
+	}
+
+	handleMemberAdd(guildId: string, member: GuildMember): void {
+		this.members = {
+			...this.members,
+			[guildId]: {
+				...(this.members[guildId] ?? {}),
+				[member.user.id]: new GuildMemberRecord(guildId, member),
+			},
+		};
+	}
+
+	handleMemberRemove(guildId: string, userId: string): void {
+		const existingMembers = this.members[guildId];
+		if (!existingMembers) {
+			return;
+		}
+
+		const updatedGuildMembers = Object.fromEntries(Object.entries(existingMembers).filter(([id]) => id !== userId));
+
+		this.members = {
+			...this.members,
+			...(Object.keys(updatedGuildMembers).length > 0 ? {[guildId]: updatedGuildMembers} : {}),
+		};
+	}
+
+	handleGuildRoleDelete(guildId: string, roleId: string): void {
+		const existingMembers = this.members[guildId];
+		if (!existingMembers) {
+			return;
+		}
+
+		const updatedGuildMembers = Object.fromEntries(
+			Object.entries(existingMembers).map(([memberId, member]) => {
+				if (member.roles.has(roleId)) {
+					const newRoles = new Set(member.roles);
+					newRoles.delete(roleId);
+					return [
+						memberId,
+						new GuildMemberRecord(guildId, {
+							...member.toJSON(),
+							roles: Array.from(newRoles),
+						}),
+					];
+				}
+				return [memberId, member];
+			}),
+		);
+
+		this.members = {
+			...this.members,
+			[guildId]: updatedGuildMembers,
+		};
+	}
+
+	handleMembersChunk(params: {
+		guildId: string;
+		members: Array<GuildMember>;
+		chunkIndex: number;
+		chunkCount: number;
+		nonce?: string;
+	}): void {
+		const {guildId, members, chunkCount, nonce} = params;
+
+		const newMembers: Array<GuildMemberRecord> = [];
+		for (const member of members) {
+			const record = new GuildMemberRecord(guildId, member);
+			newMembers.push(record);
+		}
+
+		this.members = {
+			...this.members,
+			[guildId]: {
+				...(this.members[guildId] ?? {}),
+				...newMembers.reduce((acc, member) => {
+					acc[member.user.id] = member;
+					return acc;
+				}, {} as Members),
+			},
+		};
+
+		if (nonce) {
+			const pending = this.pendingRequests.get(nonce);
+			if (pending) {
+				pending.members.push(...newMembers);
+				pending.receivedChunks++;
+
+				if (pending.receivedChunks >= chunkCount) {
+					pending.resolve(pending.members);
+					this.pendingRequests.delete(nonce);
+				}
+			}
+		}
+	}
+
+	async fetchMembers(
+		guildId: string,
+		options?: {
+			query?: string;
+			limit?: number;
+			userIds?: Array<string>;
+		},
+	): Promise<Array<GuildMemberRecord>> {
+		const nonce = generateMemberNonce();
+
+		return new Promise((resolve, reject) => {
+			this.pendingRequests.set(nonce, {
+				resolve,
+				reject,
+				members: [],
+				receivedChunks: 0,
+				expectedChunks: 1,
+			});
+
+			const socket = ConnectionStore.socket;
+			const requestOptions: {
+				guildId: string;
+				nonce: string;
+				query?: string;
+				limit?: number;
+				userIds?: Array<string>;
+			} = {
+				guildId,
+				nonce,
+			};
+
+			if (options?.query) {
+				requestOptions.query = options.query;
+			}
+
+			if (options?.limit !== undefined) {
+				requestOptions.limit = options.limit;
+			}
+
+			if (options?.userIds && options.userIds.length > 0) {
+				requestOptions.userIds = options.userIds;
+			}
+
+			socket?.requestGuildMembers(requestOptions);
+
+			setTimeout(() => {
+				if (this.pendingRequests.has(nonce)) {
+					this.pendingRequests.delete(nonce);
+					reject(new Error('Request timed out'));
+				}
+			}, MEMBER_REQUEST_TIMEOUT);
+		});
+	}
+
+	async ensureMembersLoaded(guildId: string, userIds: Array<string>): Promise<void> {
+		const missingIds = userIds.filter((id) => !this.members[guildId]?.[id]);
+		if (missingIds.length === 0) {
+			return;
+		}
+
+		await this.fetchMembers(guildId, {userIds: missingIds});
+	}
+
+	isGuildFullyLoaded(guildId: string): boolean {
+		return this.loadedGuilds.has(guildId);
+	}
+}
+
+export default new GuildMemberStore();