97 lines
2.9 KiB
TypeScript
97 lines
2.9 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 React from "react";
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import { ComponentClass } from "../@types/common";
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export interface IToast<C extends ComponentClass> {
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key: string;
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// higher priority number will be shown on top of lower priority
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priority: number;
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title?: string;
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icon?: string;
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component: C;
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className?: string;
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bodyClassName?: string;
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props?: Omit<React.ComponentProps<C>, "toastKey">; // toastKey is injected by ToastContainer
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}
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/**
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* Holds the active toasts
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*/
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export default class ToastStore extends EventEmitter {
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private toasts: IToast<any>[] = [];
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// The count of toasts which have been seen & dealt with in this stack
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// where the count resets when the stack of toasts clears.
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private countSeen = 0;
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static sharedInstance() {
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if (!window.mxToastStore) window.mxToastStore = new ToastStore();
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return window.mxToastStore;
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}
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reset() {
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this.toasts = [];
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this.countSeen = 0;
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}
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/**
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* Add or replace a toast
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* If a toast with the same toastKey already exists, the given toast will replace it
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* Toasts are always added underneath any toasts of the same priority, so existing
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* toasts stay at the top unless a higher priority one arrives (better to not change the
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* toast unless necessary).
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*
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* @param {object} newToast The new toast
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*/
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addOrReplaceToast<C extends ComponentClass>(newToast: IToast<C>) {
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const oldIndex = this.toasts.findIndex(t => t.key === newToast.key);
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if (oldIndex === -1) {
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let newIndex = this.toasts.length;
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while (newIndex > 0 && this.toasts[newIndex - 1].priority < newToast.priority) --newIndex;
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this.toasts.splice(newIndex, 0, newToast);
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} else {
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this.toasts[oldIndex] = newToast;
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}
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this.emit('update');
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}
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dismissToast(key) {
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if (this.toasts[0] && this.toasts[0].key === key) {
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this.countSeen++;
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}
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const length = this.toasts.length;
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this.toasts = this.toasts.filter(t => t.key !== key);
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if (length !== this.toasts.length) {
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if (this.toasts.length === 0) {
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this.countSeen = 0;
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}
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this.emit('update');
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}
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}
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getToasts() {
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return this.toasts;
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}
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getCountSeen() {
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return this.countSeen;
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}
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}
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