// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

'use strict';

import { ISignal, Slot } from '@phosphor/signaling';

export class Signal<T, S> implements ISignal<T, S> {

private slots: Set<Slot<T, S>> = new Set<Slot<T, S>>();

// tslint:disable-next-line: no-any

public connect(slot: Slot<T, S>, thisArg?: any): boolean {

const bound = thisArg ? slot.bind(thisArg) : slot;

this.slots.add(bound);

return true;

}

// tslint:disable-next-line: no-any

public disconnect(slot: Slot<T, S>, thisArg?: any): boolean {

const bound = thisArg ? slot.bind(thisArg) : slot;

this.slots.delete(bound);

return true;

}

public fire(sender: T, args: S): void {

this.slots.forEach((s) => s(sender, args));

}

}