import { PointInterface } from "./Websocket/PointInterface"; import { Group } from "./Group"; import { User, UserSocket } from "./User"; import { PositionInterface } from "_Model/PositionInterface"; import { EmoteCallback, EntersCallback, LeavesCallback, MovesCallback } from "_Model/Zone"; import { PositionNotifier } from "./PositionNotifier"; import { Movable } from "_Model/Movable"; import { EmoteEventMessage, JoinRoomMessage } from "../Messages/generated/messages_pb"; import { ProtobufUtils } from "../Model/Websocket/ProtobufUtils"; import { ZoneSocket } from "src/RoomManager"; import { Admin } from "../Model/Admin"; export type ConnectCallback = (user: User, group: Group) => void; export type DisconnectCallback = (user: User, group: Group) => void; export class GameRoom { private readonly minDistance: number; private readonly groupRadius: number; // Users, sorted by ID private readonly users: Map; private readonly usersByUuid: Map; private readonly groups: Set; private readonly admins: Set; private readonly connectCallback: ConnectCallback; private readonly disconnectCallback: DisconnectCallback; private itemsState: Map = new Map(); private readonly positionNotifier: PositionNotifier; public readonly roomUrl: string; private versionNumber: number = 1; private nextUserId: number = 1; constructor( roomUrl: string, connectCallback: ConnectCallback, disconnectCallback: DisconnectCallback, minDistance: number, groupRadius: number, onEnters: EntersCallback, onMoves: MovesCallback, onLeaves: LeavesCallback, onEmote: EmoteCallback ) { this.roomUrl = roomUrl; this.users = new Map(); this.usersByUuid = new Map(); this.admins = new Set(); this.groups = new Set(); this.connectCallback = connectCallback; this.disconnectCallback = disconnectCallback; this.minDistance = minDistance; this.groupRadius = groupRadius; // A zone is 10 sprites wide. this.positionNotifier = new PositionNotifier(320, 320, onEnters, onMoves, onLeaves, onEmote); } public getGroups(): Group[] { return Array.from(this.groups.values()); } public getUsers(): Map { return this.users; } public getUserByUuid(uuid: string): User | undefined { return this.usersByUuid.get(uuid); } public getUserById(id: number): User | undefined { return this.users.get(id); } public join(socket: UserSocket, joinRoomMessage: JoinRoomMessage): User { const positionMessage = joinRoomMessage.getPositionmessage(); if (positionMessage === undefined) { throw new Error("Missing position message"); } const position = ProtobufUtils.toPointInterface(positionMessage); const user = new User( this.nextUserId, joinRoomMessage.getUseruuid(), joinRoomMessage.getIpaddress(), position, false, this.positionNotifier, socket, joinRoomMessage.getTagList(), joinRoomMessage.getVisitcardurl(), joinRoomMessage.getName(), ProtobufUtils.toCharacterLayerObjects(joinRoomMessage.getCharacterlayerList()), joinRoomMessage.getCompanion() ); this.nextUserId++; this.users.set(user.id, user); this.usersByUuid.set(user.uuid, user); this.updateUserGroup(user); // Notify admins for (const admin of this.admins) { admin.sendUserJoin(user.uuid, user.name, user.IPAddress); } return user; } public leave(user: User) { const userObj = this.users.get(user.id); if (userObj === undefined) { console.warn("User ", user.id, "does not belong to this game room! It should!"); } if (userObj !== undefined && typeof userObj.group !== "undefined") { this.leaveGroup(userObj); } this.users.delete(user.id); this.usersByUuid.delete(user.uuid); if (userObj !== undefined) { this.positionNotifier.leave(userObj); } // Notify admins for (const admin of this.admins) { admin.sendUserLeft(user.uuid /*, user.name, user.IPAddress*/); } } public isEmpty(): boolean { return this.users.size === 0 && this.admins.size === 0; } public updatePosition(user: User, userPosition: PointInterface): void { user.setPosition(userPosition); this.updateUserGroup(user); } private updateUserGroup(user: User): void { user.group?.updatePosition(); if (user.silent) { return; } if (user.group === undefined) { // If the user is not part of a group: // should he join a group? // If the user is moving, don't try to join if (user.getPosition().moving) { return; } const closestItem: User | Group | null = this.searchClosestAvailableUserOrGroup(user); if (closestItem !== null) { if (closestItem instanceof Group) { // Let's join the group! closestItem.join(user); } else { const closestUser: User = closestItem; const group: Group = new Group( this.roomUrl, [user, closestUser], this.connectCallback, this.disconnectCallback, this.positionNotifier ); this.groups.add(group); } } } else { // If the user is part of a group: // should he leave the group? const distance = GameRoom.computeDistanceBetweenPositions(user.getPosition(), user.group.getPosition()); if (distance > this.groupRadius) { this.leaveGroup(user); } } } setSilent(user: User, silent: boolean) { if (user.silent === silent) { return; } user.silent = silent; if (silent && user.group !== undefined) { this.leaveGroup(user); } if (!silent) { // If we are back to life, let's trigger a position update to see if we can join some group. this.updatePosition(user, user.getPosition()); } } /** * Makes a user leave a group and closes and destroy the group if the group contains only one remaining person. * * @param user */ private leaveGroup(user: User): void { const group = user.group; if (group === undefined) { throw new Error("The user is part of no group"); } group.leave(user); if (group.isEmpty()) { this.positionNotifier.leave(group); group.destroy(); if (!this.groups.has(group)) { throw new Error( "Could not find group " + group.getId() + " referenced by user " + user.id + " in World." ); } this.groups.delete(group); //todo: is the group garbage collected? } else { group.updatePosition(); //this.positionNotifier.updatePosition(group, group.getPosition(), oldPosition); } } /** * Looks for the closest user that is: * - close enough (distance <= minDistance) * - not in a group * - not silent * OR * - close enough to a group (distance <= groupRadius) */ private searchClosestAvailableUserOrGroup(user: User): User | Group | null { let minimumDistanceFound: number = Math.max(this.minDistance, this.groupRadius); let matchingItem: User | Group | null = null; this.users.forEach((currentUser, userId) => { // Let's only check users that are not part of a group if (typeof currentUser.group !== "undefined") { return; } if (currentUser === user) { return; } if (currentUser.silent) { return; } const distance = GameRoom.computeDistance(user, currentUser); // compute distance between peers. if (distance <= minimumDistanceFound && distance <= this.minDistance) { minimumDistanceFound = distance; matchingItem = currentUser; } }); this.groups.forEach((group: Group) => { if (group.isFull()) { return; } const distance = GameRoom.computeDistanceBetweenPositions(user.getPosition(), group.getPosition()); if (distance <= minimumDistanceFound && distance <= this.groupRadius) { minimumDistanceFound = distance; matchingItem = group; } }); return matchingItem; } public static computeDistance(user1: User, user2: User): number { const user1Position = user1.getPosition(); const user2Position = user2.getPosition(); return Math.sqrt( Math.pow(user2Position.x - user1Position.x, 2) + Math.pow(user2Position.y - user1Position.y, 2) ); } public static computeDistanceBetweenPositions(position1: PositionInterface, position2: PositionInterface): number { return Math.sqrt(Math.pow(position2.x - position1.x, 2) + Math.pow(position2.y - position1.y, 2)); } public setItemState(itemId: number, state: unknown) { this.itemsState.set(itemId, state); } public getItemsState(): Map { return this.itemsState; } public addZoneListener(call: ZoneSocket, x: number, y: number): Set { return this.positionNotifier.addZoneListener(call, x, y); } public removeZoneListener(call: ZoneSocket, x: number, y: number): void { return this.positionNotifier.removeZoneListener(call, x, y); } public adminJoin(admin: Admin): void { this.admins.add(admin); // Let's send all connected users for (const user of this.users.values()) { admin.sendUserJoin(user.uuid, user.name, user.IPAddress); } } public adminLeave(admin: Admin): void { this.admins.delete(admin); } public incrementVersion(): number { this.versionNumber++; return this.versionNumber; } public emitEmoteEvent(user: User, emoteEventMessage: EmoteEventMessage) { this.positionNotifier.emitEmoteEvent(user, emoteEventMessage); } }