@haelp/teto/dist/engine/multiplayer/ige.mjs

A typescript-based controllable TETR.IO client.

import { polyfills } from "../utils/index.mjs";
/**
 * Manages network IGE cancelling
 */ export class IGEHandler {
    /** @hidden */ players;
    /** @hidden */ iid = 0;
    /** @hidden */ extract(data) {
        return JSON.parse(data);
    }
    /** @hidden */ stringify(data) {
        return JSON.stringify(data);
    }
    /**
   * Manages network IGE cancelling
   * @param players - list of player ids
   */ constructor(players){
        this.players = new polyfills.Map();
        players.forEach((player)=>{
            this.players.set(player, this.stringify({
                incoming: 0,
                outgoing: []
            }));
        });
    }
    /**
   * Sends a message to a player.
   * @param options - info on sending player
   * @param options.playerID - The ID of the player to send the message to.
   * @param options.amount - The amount of the message.
   * @throws {Error} If the player is not found.
   */ send({ playerID, amount }) {
        if (amount === 0) return;
        const player = this.players.get(playerID);
        const iid = ++this.iid;
        if (!player) throw new Error(`player not found: player with id ${playerID} not in ${[
            ...this.players.keys()
        ].join(", ")}`);
        this.players.set(playerID, JSON.stringify({
            incoming: JSON.parse(player).incoming,
            outgoing: [
                ...this.extract(player).outgoing,
                {
                    iid,
                    amount
                }
            ]
        }));
    // console.log(
    //   "send",
    //   playerID,
    //   Object.fromEntries(
    //     [...this.players.entries()].map(([k, v]) => [k, this.extract(v)])
    //   )
    // );
    }
    /**
   * Receives a garbage from a player and processes it.
   * @param garbage - garbage object of data
   * @param garbage.playerID - The ID of the player sending the garbage.
   * @param garbage.ackiid - The IID of the last acknowledged item.
   * @param garbage.iid - The IID of the incoming item.
   * @param garbage.amount - The amount of the incoming item.
   * @returns The remaining amount after processing the message.
   * @throws {Error} If the player is not found.
   */ receive({ playerID, ackiid, iid, amount }) {
        const player = this.players.get(playerID);
        if (!player) throw new Error(`player not found: player with id ${playerID} not in ${[
            ...this.players.keys()
        ].join(", ")}`);
        const p = this.extract(player);
        const incomingIID = Math.max(iid, p.incoming ?? 0);
        const newIGEs = [];
        let runningAmount = amount;
        p.outgoing.forEach((item)=>{
            if (item.iid <= ackiid) return;
            const amt = Math.min(item.amount, runningAmount);
            item.amount -= amt;
            runningAmount -= amt;
            if (item.amount > 0) newIGEs.push(item);
        });
        this.players.set(playerID, this.stringify({
            incoming: incomingIID,
            outgoing: newIGEs
        }));
        // console.log(
        //   "receive",
        //   playerID,
        //   Object.fromEntries(
        //     [...this.players.entries()].map(([k, v]) => [k, this.extract(v)])
        //   )
        // );
        return runningAmount;
    }
    snapshot() {
        return {
            players: Object.fromEntries(this.players.entries()),
            iid: this.iid
        };
    }
    fromSnapshot(snapshot) {
        this.players = new polyfills.Map(Object.entries(snapshot.players).map(([k, v])=>[
                Number(k),
                v
            ]));
        this.iid = snapshot.iid;
    }
}

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