298 lines
10 KiB
TypeScript
298 lines
10 KiB
TypeScript
import {PointInterface} from "./Websocket/PointInterface";
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import {Group} from "./Group";
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import {User, UserSocket} from "./User";
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import {ExSocketInterface} from "_Model/Websocket/ExSocketInterface";
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import {PositionInterface} from "_Model/PositionInterface";
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import {Identificable} from "_Model/Websocket/Identificable";
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import {EntersCallback, LeavesCallback, MovesCallback} from "_Model/Zone";
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import {PositionNotifier} from "./PositionNotifier";
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import {ViewportInterface} from "_Model/Websocket/ViewportMessage";
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import {Movable} from "_Model/Movable";
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import {extractDataFromPrivateRoomId, extractRoomSlugPublicRoomId, isRoomAnonymous} from "./RoomIdentifier";
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import {arrayIntersect} from "../Services/ArrayHelper";
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import {MAX_USERS_PER_ROOM} from "../Enum/EnvironmentVariable";
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import {JoinRoomMessage} from "../Messages/generated/messages_pb";
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import {ProtobufUtils} from "../Model/Websocket/ProtobufUtils";
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import { ZoneSocket } from "src/RoomManager";
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export type ConnectCallback = (user: User, group: Group) => void;
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export type DisconnectCallback = (user: User, group: Group) => void;
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export enum GameRoomPolicyTypes {
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ANONYMUS_POLICY = 1,
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MEMBERS_ONLY_POLICY,
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USE_TAGS_POLICY,
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}
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export class GameRoom {
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private readonly minDistance: number;
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private readonly groupRadius: number;
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// Users, sorted by ID
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private readonly users: Map<number, User>;
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private readonly groups: Set<Group>;
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private readonly connectCallback: ConnectCallback;
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private readonly disconnectCallback: DisconnectCallback;
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private itemsState: Map<number, unknown> = new Map<number, unknown>();
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private readonly positionNotifier: PositionNotifier;
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public readonly roomId: string;
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public readonly anonymous: boolean;
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public tags: string[];
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public policyType: GameRoomPolicyTypes;
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public readonly roomSlug: string;
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public readonly worldSlug: string = '';
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public readonly organizationSlug: string = '';
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private nextUserId: number = 1;
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constructor(roomId: string,
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connectCallback: ConnectCallback,
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disconnectCallback: DisconnectCallback,
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minDistance: number,
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groupRadius: number,
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onEnters: EntersCallback,
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onMoves: MovesCallback,
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onLeaves: LeavesCallback)
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{
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this.roomId = roomId;
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this.anonymous = isRoomAnonymous(roomId);
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this.tags = [];
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this.policyType = GameRoomPolicyTypes.ANONYMUS_POLICY;
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if (this.anonymous) {
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this.roomSlug = extractRoomSlugPublicRoomId(this.roomId);
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} else {
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const {organizationSlug, worldSlug, roomSlug} = extractDataFromPrivateRoomId(this.roomId);
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this.roomSlug = roomSlug;
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this.organizationSlug = organizationSlug;
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this.worldSlug = worldSlug;
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}
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this.users = new Map<number, User>();
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this.groups = new Set<Group>();
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this.connectCallback = connectCallback;
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this.disconnectCallback = disconnectCallback;
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this.minDistance = minDistance;
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this.groupRadius = groupRadius;
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// A zone is 10 sprites wide.
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this.positionNotifier = new PositionNotifier(320, 320, onEnters, onMoves, onLeaves);
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}
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public getGroups(): Group[] {
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return Array.from(this.groups.values());
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}
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public getUsers(): Map<number, User> {
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return this.users;
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}
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public join(socket : UserSocket, joinRoomMessage: JoinRoomMessage): User {
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const positionMessage = joinRoomMessage.getPositionmessage();
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if (positionMessage === undefined) {
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throw new Error('Missing position message');
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}
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const position = ProtobufUtils.toPointInterface(positionMessage);
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const user = new User(this.nextUserId, joinRoomMessage.getUseruuid(), position, false, this.positionNotifier, socket, joinRoomMessage.getTagList(), joinRoomMessage.getName(), ProtobufUtils.toCharacterLayerObjects(joinRoomMessage.getCharacterlayerList()));
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this.nextUserId++;
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this.users.set(user.id, user);
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// Let's call update position to trigger the join / leave room
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//this.updatePosition(socket, userPosition);
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this.updateUserGroup(user);
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return user;
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}
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public leave(user : User){
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const userObj = this.users.get(user.id);
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if (userObj === undefined) {
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console.warn('User ', user.id, 'does not belong to this game room! It should!');
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}
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if (userObj !== undefined && typeof userObj.group !== 'undefined') {
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this.leaveGroup(userObj);
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}
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this.users.delete(user.id);
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if (userObj !== undefined) {
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this.positionNotifier.leave(userObj);
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}
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}
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get isFull(): boolean {
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return this.users.size >= MAX_USERS_PER_ROOM;
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}
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public isEmpty(): boolean {
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return this.users.size === 0;
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}
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public updatePosition(user : User, userPosition: PointInterface): void {
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user.setPosition(userPosition);
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this.updateUserGroup(user);
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}
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private updateUserGroup(user: User): void {
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user.group?.updatePosition();
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if (user.silent) {
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return;
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}
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if (user.group === undefined) {
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// If the user is not part of a group:
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// should he join a group?
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// If the user is moving, don't try to join
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if (user.getPosition().moving) {
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return;
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}
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const closestItem: User|Group|null = this.searchClosestAvailableUserOrGroup(user);
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if (closestItem !== null) {
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if (closestItem instanceof Group) {
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// Let's join the group!
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closestItem.join(user);
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} else {
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const closestUser : User = closestItem;
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const group: Group = new Group(this.roomId,[
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user,
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closestUser
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], this.connectCallback, this.disconnectCallback, this.positionNotifier);
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this.groups.add(group);
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}
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}
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} else {
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// If the user is part of a group:
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// should he leave the group?
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const distance = GameRoom.computeDistanceBetweenPositions(user.getPosition(), user.group.getPosition());
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if (distance > this.groupRadius) {
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this.leaveGroup(user);
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}
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}
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}
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setSilent(user: User, silent: boolean) {
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if (user.silent === silent) {
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return;
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}
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user.silent = silent;
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if (silent && user.group !== undefined) {
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this.leaveGroup(user);
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}
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if (!silent) {
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// If we are back to life, let's trigger a position update to see if we can join some group.
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this.updatePosition(user, user.getPosition());
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}
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}
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/**
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* Makes a user leave a group and closes and destroy the group if the group contains only one remaining person.
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*
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* @param user
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*/
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private leaveGroup(user: User): void {
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const group = user.group;
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if (group === undefined) {
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throw new Error("The user is part of no group");
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}
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group.leave(user);
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if (group.isEmpty()) {
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this.positionNotifier.leave(group);
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group.destroy();
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if (!this.groups.has(group)) {
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throw new Error("Could not find group "+group.getId()+" referenced by user "+user.id+" in World.");
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}
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this.groups.delete(group);
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//todo: is the group garbage collected?
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} else {
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group.updatePosition();
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//this.positionNotifier.updatePosition(group, group.getPosition(), oldPosition);
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}
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}
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/**
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* Looks for the closest user that is:
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* - close enough (distance <= minDistance)
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* - not in a group
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* - not silent
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* OR
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* - close enough to a group (distance <= groupRadius)
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*/
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private searchClosestAvailableUserOrGroup(user: User): User|Group|null
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{
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let minimumDistanceFound: number = Math.max(this.minDistance, this.groupRadius);
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let matchingItem: User | Group | null = null;
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this.users.forEach((currentUser, userId) => {
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// Let's only check users that are not part of a group
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if (typeof currentUser.group !== 'undefined') {
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return;
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}
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if(currentUser === user) {
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return;
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}
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if (currentUser.silent) {
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return;
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}
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const distance = GameRoom.computeDistance(user, currentUser); // compute distance between peers.
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if(distance <= minimumDistanceFound && distance <= this.minDistance) {
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minimumDistanceFound = distance;
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matchingItem = currentUser;
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}
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});
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this.groups.forEach((group: Group) => {
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if (group.isFull()) {
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return;
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}
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const distance = GameRoom.computeDistanceBetweenPositions(user.getPosition(), group.getPosition());
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if(distance <= minimumDistanceFound && distance <= this.groupRadius) {
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minimumDistanceFound = distance;
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matchingItem = group;
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}
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});
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return matchingItem;
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}
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public static computeDistance(user1: User, user2: User): number
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{
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const user1Position = user1.getPosition();
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const user2Position = user2.getPosition();
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return Math.sqrt(Math.pow(user2Position.x - user1Position.x, 2) + Math.pow(user2Position.y - user1Position.y, 2));
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}
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public static computeDistanceBetweenPositions(position1: PositionInterface, position2: PositionInterface): number
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{
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return Math.sqrt(Math.pow(position2.x - position1.x, 2) + Math.pow(position2.y - position1.y, 2));
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}
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public setItemState(itemId: number, state: unknown) {
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this.itemsState.set(itemId, state);
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}
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public getItemsState(): Map<number, unknown> {
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return this.itemsState;
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}
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public canAccess(userTags: string[]): boolean {
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return arrayIntersect(userTags, this.tags);
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}
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public addZoneListener(call: ZoneSocket, x: number, y: number): Set<Movable> {
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return this.positionNotifier.addZoneListener(call, x, y);
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}
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public removeZoneListener(call: ZoneSocket, x: number, y: number): void {
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return this.positionNotifier.removeZoneListener(call, x, y);
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}
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}
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