import { World } from "./World"; import { UserInterface } from "./UserInterface"; import {PositionInterface} from "_Model/PositionInterface"; export class Group { static readonly MAX_PER_GROUP = 4; private users: UserInterface[]; private connectCallback: (user1: string, user2: string) => void; private disconnectCallback: (user1: string, user2: string) => void; constructor(users: UserInterface[], connectCallback: (user1: string, user2: string) => void, disconnectCallback: (user1: string, user2: string) => void) { this.users = []; this.connectCallback = connectCallback; this.disconnectCallback = disconnectCallback; users.forEach((user: UserInterface) => { this.join(user); }); } getUsers(): UserInterface[] { return this.users; } /** * Returns the barycenter of all users (i.e. the center of the group) */ getPosition(): PositionInterface { let x = 0; let y = 0; // Let's compute the barycenter of all users. this.users.forEach((user: UserInterface) => { x += user.position.x; y += user.position.y; }); x /= this.users.length; y /= this.users.length; return { x, y }; } isFull(): boolean { return this.users.length >= Group.MAX_PER_GROUP; } isEmpty(): boolean { return this.users.length <= 1; } join(user: UserInterface): void { // Broadcast on the right event this.users.forEach((groupUser: UserInterface) => { this.connectCallback(user.id, groupUser.id); }); this.users.push(user); user.group = this; } isPartOfGroup(user: UserInterface): boolean { return this.users.indexOf(user) !== -1; } isStillIn(user: UserInterface): boolean { if(!this.isPartOfGroup(user)) { return false; } let stillIn = true; for(let i = 0; i <= this.users.length; i++) { let userInGroup = this.users[i]; let distance = World.computeDistance(user, userInGroup); if(distance > World.MIN_DISTANCE) { stillIn = false; break; } } return stillIn; } /*removeFromGroup(users: UserInterface[]): void { for(let i = 0; i < users.length; i++){ let user = users[i]; const index = this.users.indexOf(user, 0); if (index > -1) { this.users.splice(index, 1); } } }*/ leave(user: UserInterface): void { const index = this.users.indexOf(user, 0); if (index === -1) { throw new Error("Could not find user in the group"); } this.users.splice(index, 1); user.group = undefined; // Broadcast on the right event this.users.forEach((groupUser: UserInterface) => { this.disconnectCallback(user.id, groupUser.id); }); } /** * Let's kick everybody out. * Usually used when there is only one user left. */ destroy(): void { this.users.forEach((user: UserInterface) => { this.leave(user); }) } }