gristlabs_grist-core/app/client/models/NotifyModel.ts

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import * as log from 'app/client/lib/log';
import {ConnectState, ConnectStateManager} from 'app/client/models/ConnectState';
import {delay} from 'app/common/delay';
import {isLongerThan} from 'app/common/gutil';
import {InactivityTimer} from 'app/common/InactivityTimer';
import {timeFormat} from 'app/common/timeFormat';
import {bundleChanges, Disposable, Holder, IDisposable, IDisposableOwner } from 'grainjs';
import {Computed, dom, DomElementArg, MutableObsArray, obsArray, Observable} from 'grainjs';
import clamp = require('lodash/clamp');
// When rendering app errors, we'll only show the last few.
const maxAppErrors = 5;
interface INotifier {
// If you are looking to report errors, please do that via reportError rather
// than these methods so that we have a chance to send the error to our logs.
createUserError(message: string, options?: INotifyOptions): INotification;
createAppError(error: Error): void;
createProgressIndicator(name: string, size: string, expireOnComplete: boolean): IProgress;
createNotification(options: INotifyOptions): INotification;
setConnectState(isConnected: boolean): void;
slowNotification<T>(promise: Promise<T>, optTimeout?: number): Promise<T>;
getFullAppErrors(): IAppError[];
}
interface INotification extends Expirable {
expire(): Promise<void>;
}
export interface IProgress extends Expirable {
setProgress(percent: number): void;
}
// Identifies supported actions. These are implemented in NotifyUI.
export type NotifyAction = 'upgrade' | 'renew' | 'report-problem' | 'ask-for-help';
export interface INotifyOptions {
message: string | (() => DomElementArg); // A string, or a function that builds dom.
timestamp?: number;
title?: string;
canUserClose?: boolean;
inToast?: boolean;
inDropdown?: boolean;
expireSec?: number;
badgeCounter?: boolean;
// cssToastAction class from NotifyUI will be applied automatically to action elements.
actions?: NotifyAction[];
// When set, the notification will replace any previous notification with the same key.
// This way, we can avoid accumulating many of substantially identical notifications.
key?: string|null;
}
type Status = 'active' | 'expiring';
export class Expirable extends Disposable {
public static readonly fadeDelay = 250;
public readonly status = Observable.create<Status>(this, 'active');
constructor() {
super();
}
/**
* Sets status to 'expiring', then calls dispose after a short delay.
*/
public async expire(): Promise<void> {
this.status.set('expiring');
await delay(Expirable.fadeDelay);
if (!this.isDisposed()) {
this.dispose();
}
}
}
export class Notification extends Expirable implements INotification {
public options: Required<INotifyOptions> = {
title: '',
message: '',
timestamp: Date.now(),
inDropdown: false,
badgeCounter: false,
inToast: true,
expireSec: 0,
canUserClose: false,
actions: [],
key: null,
};
constructor(_opts: INotifyOptions) {
super();
Object.assign(this.options, _opts);
if (this.options.expireSec > 0) {
const expireTimer = setTimeout(() => this.expire(), 1000 * this.options.expireSec);
this.onDispose(() => clearTimeout(expireTimer));
}
}
}
interface IProgressOptions {
name: string;
size: string;
expireOnComplete?: boolean;
}
export class Progress extends Expirable implements IProgress {
public readonly progress = Observable.create(this, 0);
constructor(public options: IProgressOptions) {
super();
if (options.expireOnComplete) {
this.autoDispose(this.progress.addListener(async progress => {
if (progress >= 100) {
await this.expire();
}
}));
}
}
/**
* progress should be between 0 and 100.
*/
public setProgress(progress: number) {
this.progress.set(clamp(progress, 0, 100));
}
}
/**
* Similar to grainjs MultiHolder, but knows when items are disposed externally and releases them
* (avoiding the "already disposed" warnings in that case). This is probably how grainjs's
* MultiHolder should actually work, and maybe how `Disposable.autoDispose` should generally work.
*/
export class BetterMultiHolder implements IDisposableOwner {
private _items = new Set<IDisposable>();
public autoDispose<T extends IDisposable>(obj: T): T {
this._items.add(obj);
if (obj instanceof Disposable) {
obj.onDispose(() => this._items.delete(obj));
}
return obj;
}
public dispose() {
for (const item of this._items) {
item.dispose();
}
this._items.clear();
}
}
export interface IAppError {
error: Error;
timestamp: number;
seen?: boolean; // If seen, this will be hidden from the "app errors" toast
}
export class Notifier extends Disposable implements INotifier {
private _itemsHolder = this.autoDispose(new BetterMultiHolder());
private _toasts = this.autoDispose(obsArray<Notification>());
private _dropdownItems = this.autoDispose(obsArray<Notification>());
private _progressItems = this.autoDispose(obsArray<Progress>([]));
private _keyedItems = new Map<string, Notification>();
private _connectStateManager = ConnectStateManager.create(this);
private _connectState = this._connectStateManager.connectState;
private _disconnectMsg = Computed.create(this, (use) => getDisconnectMessage(use(this._connectState)));
// Holds recent application errors, which the user may report to us.
private _appErrorList = this.autoDispose(obsArray<IAppError>());
// The dropdown will show all recent errors; the toast only the "new" ones, i.e. those since the
// last toast was closed.
private _appErrorDropdownItem = Holder.create<INotification>(this);
private _appErrorToast = Holder.create<INotification>(this);
private _slowNotificationToast = Holder.create<INotification>(this);
private _slowNotificationInactivityTimer = new InactivityTimer(() => this._slowNotificationToast.clear(), 0);
constructor() {
super();
Computed.create(this, this._disconnectMsg, (use, msg) =>
msg ? use.owner.autoDispose(this.createNotification({
message: msg.message,
title: msg.title,
canUserClose: true,
inToast: true,
})) : null);
}
/**
* Exposes all the state needed for building UI. This is simply to clarify the intended usage:
* these members aren't intended to be exposed, except to the UI-building code.
*/
public getStateForUI() {
return {
toasts: this._toasts,
dropdownItems: this._dropdownItems,
progressItems: this._progressItems,
connectState: this._connectState,
disconnectMsg: this._disconnectMsg,
};
}
/**
* Creates a basic toast user error. By default, expires in 5 seconds.
* Takes an options objects to configure `expireSec` and `canUserClose`.
* Set `expireSec` to 0 to prevent expiration.
*
* If you are looking to report errors, please do that via reportError so
* that we have a chance to send the error to our logs.
*/
public createUserError(message: string, options: Partial<INotifyOptions> = {}): INotification {
const timestamp = Date.now();
if (options.actions && options.actions.includes('ask-for-help')) {
// If user should be able to ask for help, add this error to the notifier dropdown too for a
// good while, so the user can find it after the toast disappears.
this.createNotification({
timestamp,
message,
inToast: false,
expireSec: 300,
canUserClose: true,
inDropdown: true,
...options,
key: options.key && ("dropdown:" + options.key),
});
}
return this.createNotification({
timestamp,
message,
inToast: true,
expireSec: 10,
canUserClose: true,
inDropdown: false,
...options,
});
}
/**
* If you are looking to report errors, please do that via reportError so
* that we have a chance to send the error to our logs.
*/
public createAppError(error: Error): void {
bundleChanges(() => {
// Remove old messages, to keep a max of maxAppErrors.
if (this._appErrorList.get().length >= maxAppErrors) {
this._appErrorList.splice(0, this._appErrorList.get().length - maxAppErrors + 1);
}
this._appErrorList.push({error, timestamp: Date.now()});
});
// Create a dropdown item for errors if we don't have one yet.
if (this._appErrorDropdownItem.isEmpty()) {
this._appErrorDropdownItem.autoDispose(this._createAppErrorItem('dropdown'));
}
// Create a toast for errors if we don't have one yet. When it's closed, mark the items as
// "seen" (i.e. not to be shown when the toast pops up again).
if (this._appErrorToast.isEmpty()) {
const n = this._appErrorToast.autoDispose(this._createAppErrorItem('toast'));
n.onDispose(() => this._appErrorList.get().forEach((appErr) => { appErr.seen = true; }));
}
}
public createNotification(opts: INotifyOptions): INotification {
const n = Notification.create(this._itemsHolder, opts);
this._addNotification(n).catch((e) => { log.warn('_addNotification failed', e); });
return n;
}
public createProgressIndicator(name: string, size: string, expireOnComplete = false): IProgress {
// Progress objects normally dispose themselves; constructor disposes any leftover items.
const p = Progress.create(this._itemsHolder, {name, size, expireOnComplete});
this._progressItems.push(p);
p.onDispose(() => this.isDisposed() || arrayRemove(this._progressItems, p));
return p;
}
public setConnectState(isConnected: boolean): void {
this._connectStateManager.setConnected(isConnected);
}
public getFullAppErrors() {
return this._appErrorList.get();
}
// This is exposed primarily for tests.
public clearAppErrors() {
this._appErrorList.splice(0);
}
/**
* Show a notification when promise takes longer than optTimeout to resolve. Returns the passed in
* promise.
*/
public async slowNotification<T>(promise: Promise<T>, optTimeout: number = 1000): Promise<T> {
if (await isLongerThan(promise, optTimeout)) {
if (this._slowNotificationToast.isEmpty()) {
this._slowNotificationToast.autoDispose(this.createNotification({
message: "Still working...",
canUserClose: false,
inToast: true,
}));
}
await this._slowNotificationInactivityTimer.disableUntilFinish(promise);
}
return promise;
}
private async _addNotification(n: Notification): Promise<void> {
const key = n.options.key;
if (key) {
const prev = this._keyedItems.get(key);
if (prev) {
await prev.expire();
}
this._keyedItems.set(key, n);
n.onDispose(() => this.isDisposed() || this._keyedItems.delete(key));
}
if (n.options.inToast) {
this._toasts.push(n);
n.onDispose(() => this.isDisposed() || arrayRemove(this._toasts, n));
}
if (n.options.inDropdown) {
this._dropdownItems.push(n);
n.onDispose(() => this.isDisposed() || arrayRemove(this._dropdownItems, n));
}
}
private _createAppErrorItem(where: 'toast' | 'dropdown') {
return this.createNotification({
// Building DOM here in NotifyModel seems wrong, but I haven't come up with a better way.
message: () => dom.forEach(this._appErrorList, (appErr: IAppError) =>
(where === 'toast' && appErr.seen ? null :
dom('div', timeFormat('T', new Date(appErr.timestamp)), ' ', appErr.error.message)
)
),
title: 'Unexpected error',
canUserClose: true,
inToast: where === 'toast',
expireSec: where === 'toast' ? 10 : 0,
inDropdown: where === 'dropdown',
actions: ['report-problem'],
});
}
}
function arrayRemove<T>(arr: MutableObsArray<T>, elem: T) {
const removeIdx = arr.get().findIndex(e => e === elem);
if (removeIdx !== -1) {
arr.splice(removeIdx, 1);
}
}
function getDisconnectMessage(state: ConnectState): {title: string, message: string}|undefined {
switch (state) {
case ConnectState.RecentlyDisconnected:
return {title: 'Connection is lost', message: 'Attempting to reconnect...'};
case ConnectState.ReallyDisconnected:
return {title: 'Not connected', message: 'The document is in read-only mode until you are back online.'};
}
}