50 lines
1.5 KiB
TypeScript
50 lines
1.5 KiB
TypeScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import EventEmitter from "events";
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import { ComponentClass } from "../@types/common";
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import { UPDATE_EVENT } from "./AsyncStore";
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export type ToastReference = symbol;
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export default class NonUrgentToastStore extends EventEmitter {
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private static _instance: NonUrgentToastStore;
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private toasts = new Map<ToastReference, ComponentClass>();
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public static get instance(): NonUrgentToastStore {
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if (!NonUrgentToastStore._instance) {
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NonUrgentToastStore._instance = new NonUrgentToastStore();
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}
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return NonUrgentToastStore._instance;
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}
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public get components(): ComponentClass[] {
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return Array.from(this.toasts.values());
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}
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public addToast(c: ComponentClass): ToastReference {
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const ref: ToastReference = Symbol();
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this.toasts.set(ref, c);
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this.emit(UPDATE_EVENT);
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return ref;
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}
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public removeToast(ref: ToastReference) {
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this.toasts.delete(ref);
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this.emit(UPDATE_EVENT);
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}
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}
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