(core) deleting queue from single webhook

Summary: Using standard tost notification, message about webhook queue being overflown was added. message is permanent as long as queue is full. Message contains linkt to the webhook setings

Test Plan: two nbrowser test was added - one to check if message is show when queue is full, and second to check if message is dismiss when queue was cleaned.

Reviewers: georgegevoian

Reviewed By: georgegevoian

Subscribers: jarek

Differential Revision: https://phab.getgrist.com/D3929

app/client/components/GristDoc.ts

@@ -18,7 +18,6 @@ import {EditorMonitor} from "app/client/components/EditorMonitor";
 import * as GridView from 'app/client/components/GridView';
 import {Importer} from 'app/client/components/Importer';
 import {RawDataPage, RawDataPopup} from 'app/client/components/RawDataPage';
-import {DocSettingsPage} from 'app/client/ui/DocumentSettings';
 import {ActionGroupWithCursorPos, UndoStack} from 'app/client/components/UndoStack';
 import {ViewLayout} from 'app/client/components/ViewLayout';
 import {get as getBrowserGlobals} from 'app/client/lib/browserGlobals';
@@ -43,6 +42,7 @@ import {App} from 'app/client/ui/App';
 import {DocHistory} from 'app/client/ui/DocHistory';
 import {startDocTour} from "app/client/ui/DocTour";
 import {DocTutorial} from 'app/client/ui/DocTutorial';
+import {DocSettingsPage} from 'app/client/ui/DocumentSettings';
 import {isTourActive} from "app/client/ui/OnBoardingPopups";
 import {IPageWidget, toPageWidget} from 'app/client/ui/PageWidgetPicker';
 import {linkFromId, selectBy} from 'app/client/ui/selectBy';
@@ -54,8 +54,8 @@ import {isNarrowScreen, mediaSmall, mediaXSmall, testId, theme} from 'app/client
 import {IconName} from 'app/client/ui2018/IconList';
 import {icon} from 'app/client/ui2018/icons';
 import {invokePrompt} from 'app/client/ui2018/modals';
-import {FieldEditor} from "app/client/widgets/FieldEditor";
 import {DiscussionPanel} from 'app/client/widgets/DiscussionEditor';
+import {FieldEditor} from "app/client/widgets/FieldEditor";
 import {MinimalActionGroup} from 'app/common/ActionGroup';
 import {ClientQuery} from "app/common/ActiveDocAPI";
 import {CommDocChatter, CommDocUsage, CommDocUserAction} from 'app/common/CommTypes';
@@ -120,8 +120,9 @@ const RightPanelTool = StringUnion("none", "docHistory", "validations", "discuss
 export interface IExtraTool {
   icon: IconName;
   label: DomContents;
-  content: TabContent[]|IDomComponent;
+  content: TabContent[] | IDomComponent;
 }
+
 interface RawSectionOptions {
   viewSection: ViewSectionRec;
   hash: HashLink;
@@ -137,10 +138,10 @@ export class GristDoc extends DisposableWithEvents {
   public docInfo: DocInfoRec;
   public docPluginManager: DocPluginManager;
   public querySetManager: QuerySetManager;
-  public rightPanelTool: Observable<IExtraTool|null>;
+  public rightPanelTool: Observable<IExtraTool | null>;
   public isReadonly = this.docPageModel.isReadonly;
   public isReadonlyKo = toKo(ko, this.isReadonly);
-  public comparison: DocStateComparison|null;
+  public comparison: DocStateComparison | null;
   // component for keeping track of latest cursor position
   public cursorMonitor: CursorMonitor;
   // component for keeping track of a cell that is being edited
@@ -174,11 +175,11 @@ export class GristDoc extends DisposableWithEvents {
   // section (or raw data section) that is not part of this view. Maximized section is a section
   // in the view, so there is no need to render it twice, layout just hides all other sections to make
   // the space.
-  public maximizedSectionId: Observable<number|null> = Observable.create(this, null);
+  public maximizedSectionId: Observable<number | null> = Observable.create(this, null);
   // This is id of the section that is currently shown in the popup. Probably this is an external
   // section, like raw data view, or a section from another view..
-  public externalSectionId: Computed<number|null>;
+  public externalSectionId: Computed<number | null>;
-  public viewLayout: ViewLayout|null = null;
+  public viewLayout: ViewLayout | null = null;
 
   // Holder for the popped up formula editor.
   public readonly formulaPopup = Holder.create(this);
@@ -191,15 +192,15 @@ export class GristDoc extends DisposableWithEvents {
 
   private _actionLog: ActionLog;
   private _undoStack: UndoStack;
-  private _lastOwnActionGroup: ActionGroupWithCursorPos|null = null;
+  private _lastOwnActionGroup: ActionGroupWithCursorPos | null = null;
   private _rightPanelTabs = new Map<string, TabContent[]>();
   private _docHistory: DocHistory;
   private _discussionPanel: DiscussionPanel;
   private _rightPanelTool = createSessionObs(this, "rightPanelTool", "none", RightPanelTool.guard);
   private _showGristTour = getUserOrgPrefObs(this.userOrgPrefs, 'showGristTour');
   private _seenDocTours = getUserOrgPrefObs(this.userOrgPrefs, 'seenDocTours');
-  private _rawSectionOptions: Observable<RawSectionOptions|null> = Observable.create(this, null);
+  private _rawSectionOptions: Observable<RawSectionOptions | null> = Observable.create(this, null);
-  private _activeContent: Computed<IDocPage|RawSectionOptions>;
+  private _activeContent: Computed<IDocPage | RawSectionOptions>;
   private _docTutorialHolder = Holder.create<DocTutorial>(this);
   private _isRickRowing: Observable<boolean> = Observable.create(this, false);
   private _showBackgroundVideoPlayer: Observable<boolean> = Observable.create(this, false);
@@ -285,9 +286,13 @@ export class GristDoc extends DisposableWithEvents {
       }
     }));
 
+
     // Subscribe to URL state, and navigate to anchor or open a popup if necessary.
     this.autoDispose(subscribe(urlState().state, async (use, state) => {
-      if (!state.hash) { return; }
+      if (!state.hash) {
+        return;
+      }
+
 
       try {
         if (state.hash.popup) {
@@ -321,7 +326,9 @@ export class GristDoc extends DisposableWithEvents {
           this._waitForView()
             .then(() => {
               const cursor = document.querySelector('.selected_cursor.active_cursor');
-              if (!cursor) { return; }
+              if (!cursor) {
+                return;
+              }
 
               this.behavioralPromptsManager.showTip(cursor, 'rickRow', {
                 forceShow: true,
@@ -427,8 +434,8 @@ export class GristDoc extends DisposableWithEvents {
     // Set the available import sources in the DocPageModel.
     this.docPageModel.importSources = importMenuItems;
 
-    this._actionLog = this.autoDispose(ActionLog.create({ gristDoc: this }));
+    this._actionLog = this.autoDispose(ActionLog.create({gristDoc: this}));
-    this._undoStack = this.autoDispose(UndoStack.create(openDocResponse.log, { gristDoc: this }));
+    this._undoStack = this.autoDispose(UndoStack.create(openDocResponse.log, {gristDoc: this}));
     this._docHistory = DocHistory.create(this, this.docPageModel, this._actionLog);
     this._discussionPanel = DiscussionPanel.create(this, this);
 
@@ -439,9 +446,15 @@ export class GristDoc extends DisposableWithEvents {
 
     /* Command binding */
     this.autoDispose(commands.createGroup({
-      undo() { this._undoStack.sendUndoAction().catch(reportError); },
+      undo() {
-      redo() { this._undoStack.sendRedoAction().catch(reportError); },
+        this._undoStack.sendUndoAction().catch(reportError);
-      reloadPlugins() { void this.docComm.reloadPlugins().then(() => G.window.location.reload(false)); },
+      },
+      redo() {
+        this._undoStack.sendRedoAction().catch(reportError);
+      },
+      reloadPlugins() {
+        void this.docComm.reloadPlugins().then(() => G.window.location.reload(false));
+      },
 
       // Command to be manually triggered on cell selection. Moves the cursor to the selected cell.
       // This is overridden by the formula editor to insert "$col" variables when clicking cells.
@@ -454,6 +467,8 @@ export class GristDoc extends DisposableWithEvents {
 
     this.listenTo(app.comm, 'docChatter', this.onDocChatter);
 
+    this._handleTriggerQueueOverflowMessage();
+
     this.autoDispose(DocConfigTab.create({gristDoc: this}));
 
     this.rightPanelTool = Computed.create(this, (use) => this._getToolContent(use(this._rightPanelTool)));
@@ -478,7 +493,9 @@ export class GristDoc extends DisposableWithEvents {
     // switch for a moment to knockout to fix this.
     const viewInstance = fromKo(this.autoDispose(ko.pureComputed(() => {
       const viewId = toKo(ko, this.activeViewId)();
-      if (!isViewDocPage(viewId)) { return null; }
+      if (!isViewDocPage(viewId)) {
+        return null;
+      }
       const section = this.viewModel.activeSection();
       if (section?.isDisposed()) { return null; }
       const view = section.viewInstance();
@@ -490,7 +507,9 @@ export class GristDoc extends DisposableWithEvents {
       if (view) {
         await view.getLoadingDonePromise();
       }
-      if (view?.isDisposed()) { return; }
+      if (view?.isDisposed()) {
+        return;
+      }
       // finally set the current view as fully loaded
       this.currentView.set(view);
     }));
@@ -499,12 +518,18 @@ export class GristDoc extends DisposableWithEvents {
     this.cursorPosition = Computed.create<ViewCursorPos | undefined>(this, use => {
       // get the BaseView
       const view = use(this.currentView);
-      if (!view) { return undefined; }
+      if (!view) {
+        return undefined;
+      }
       const viewId = use(this.activeViewId);
-      if (!isViewDocPage(viewId)) { return undefined; }
+      if (!isViewDocPage(viewId)) {
+        return undefined;
+      }
       // read latest position
       const currentPosition = use(view.cursor.currentPosition);
-      if (currentPosition) { return { ...currentPosition, viewId }; }
+      if (currentPosition) {
+        return {...currentPosition, viewId};
+      }
       return undefined;
     });
 
@@ -520,7 +545,9 @@ export class GristDoc extends DisposableWithEvents {
     // When active section is changed to a chart or custom widget, change the tab in the creator
     // panel to the table.
     this.autoDispose(this.viewModel.activeSection.subscribe((section) => {
-      if (section.isDisposed() || section._isDeleted.peek()) { return; }
+      if (section.isDisposed() || section._isDeleted.peek()) {
+        return;
+      }
       if (['chart', 'custom'].includes(section.parentKey.peek())) {
         commands.allCommands.viewTabFocus.run();
       }
@@ -609,12 +636,12 @@ export class GristDoc extends DisposableWithEvents {
    * fields { sectionId, rowId, fieldIndex }. Fields may be missing if no section is active.
    */
   public getCursorPos(): CursorPos {
-    const pos = { sectionId: this.viewModel.activeSectionId() };
+    const pos = {sectionId: this.viewModel.activeSectionId()};
     const viewInstance = this.viewModel.activeSection.peek().viewInstance.peek();
     return Object.assign(pos, viewInstance ? viewInstance.cursor.getCursorPos() : {});
   }
 
-  public async onSetCursorPos(rowModel: BaseRowModel|undefined, fieldModel?: ViewFieldRec) {
+  public async onSetCursorPos(rowModel: BaseRowModel | undefined, fieldModel?: ViewFieldRec) {
     return this.setCursorPos({
       rowIndex: rowModel?._index() || 0,
       fieldIndex: fieldModel?._index() || 0,
@@ -669,7 +696,7 @@ export class GristDoc extends DisposableWithEvents {
     }
     try {
       await this.setCursorPos(cursorPos);
-    } catch(e) {
+    } catch (e) {
       reportError(e);
     }
   }
@@ -732,7 +759,9 @@ export class GristDoc extends DisposableWithEvents {
    * observables.
    */
   public onDocUsageMessage(message: CommDocUsage) {
-    if (!this.docComm.isActionFromThisDoc(message)) { return; }
+    if (!this.docComm.isActionFromThisDoc(message)) {
+      return;
+    }
 
     bundleChanges(() => {
       this.docPageModel.updateCurrentDocUsage(message.data.docUsage);
@@ -741,8 +770,15 @@ export class GristDoc extends DisposableWithEvents {
   }
 
   public onDocChatter(message: CommDocChatter) {
-    if (!this.docComm.isActionFromThisDoc(message)) { return; }
+    if (!this.docComm.isActionFromThisDoc(message) ||
-    if (message.data.webhooks) {
+      !message.data.webhooks) {
+      return;
+    }
+    if (message.data.webhooks.type == 'webhookOverflowError') {
+      this.trigger('webhookOverflowError',
+        t('New changes are temporarily suspended. Webhooks queue overflowed.' +
+          ' Please check webhooks settings, remove invalid webhooks, and clean the queue.'),);
+    } else {
       this.trigger('webhooks', message.data.webhooks);
     }
   }
@@ -755,7 +791,9 @@ export class GristDoc extends DisposableWithEvents {
   // in effect.
   public getTableModelMaybeWithDiff(tableId: string): DataTableModel {
     const tableModel = this.getTableModel(tableId);
-    if (!this.comparison?.details) { return tableModel; }
+    if (!this.comparison?.details) {
+      return tableModel;
+    }
     // TODO: cache wrapped models and share between views.
     return new DataTableModelWithDiff(tableModel, this.comparison.details);
   }
@@ -765,7 +803,9 @@ export class GristDoc extends DisposableWithEvents {
    */
   public async addEmptyTable(): Promise<void> {
     const name = await this._promptForName();
-    if (name === undefined) { return; }
+    if (name === undefined) {
+      return;
+    }
     const tableInfo = await this.docData.sendAction(['AddEmptyTable', name || null]);
     await this.openDocPage(this.docModel.tables.getRowModel(tableInfo.id).primaryViewId());
   }
@@ -776,7 +816,7 @@ export class GristDoc extends DisposableWithEvents {
   public async addWidgetToPage(val: IPageWidget) {
     const docData = this.docModel.docData;
     const viewName = this.viewModel.name.peek();
-    let tableId: string|null|undefined;
+    let tableId: string | null | undefined;
     if (val.table === 'New Table') {
       tableId = await this._promptForName();
       if (tableId === undefined) {
@@ -797,7 +837,7 @@ export class GristDoc extends DisposableWithEvents {
   /**
    * The actual implementation of addWidgetToPage
    */
-  public async addWidgetToPageImpl(val: IPageWidget, tableId: string|null = null) {
+  public async addWidgetToPageImpl(val: IPageWidget, tableId: string | null = null) {
     const viewRef = this.activeViewId.get();
     const tableRef = val.table === 'New Table' ? 0 : val.table;
     const result = await this.docData.sendAction(
@@ -816,7 +856,9 @@ export class GristDoc extends DisposableWithEvents {
   public async addNewPage(val: IPageWidget) {
     if (val.table === 'New Table') {
       const name = await this._promptForName();
-      if (name === undefined) { return; }
+      if (name === undefined) {
+        return;
+      }
       const result = await this.docData.sendAction(['AddEmptyTable', name]);
       await this.openDocPage(result.views[0].id);
     } else {
@@ -842,8 +884,10 @@ export class GristDoc extends DisposableWithEvents {
    * primary view.
    */
   public async uploadNewTable(): Promise<void> {
-    const uploadResult = await selectFiles({docWorkerUrl: this.docComm.docWorkerUrl,
+    const uploadResult = await selectFiles({
-                                            multiple: true});
+      docWorkerUrl: this.docComm.docWorkerUrl,
+      multiple: true
+    });
     if (uploadResult) {
       const dataSource = {uploadId: uploadResult.uploadId, transforms: []};
       const importResult = await this.docComm.finishImportFiles(dataSource, [], {});
@@ -865,7 +909,7 @@ export class GristDoc extends DisposableWithEvents {
     }
 
     return await this.viewLayout!.freezeUntil(docData.bundleActions(
-      t("Saved linked section {{title}} in view {{name}}", {title:section.title(), name: viewModel.name()}),
+      t("Saved linked section {{title}} in view {{name}}", {title: section.title(), name: viewModel.name()}),
       async () => {
 
         // if table changes or a table is made a summary table, let's replace the view section by a
@@ -932,7 +976,9 @@ export class GristDoc extends DisposableWithEvents {
 
     // adds new view fields; ignore colIds that do not exist in new table.
     await Promise.all(colIds.map((colId, i) => {
-      if (!mapColIdToColumn.has(colId)) { return; }
+      if (!mapColIdToColumn.has(colId)) {
+        return;
+      }
       const colInfo = {
         parentId: section.id(),
         colRef: mapColIdToColumn.get(colId).id(),
@@ -983,7 +1029,7 @@ export class GristDoc extends DisposableWithEvents {
   }
 
   // Turn the given columns into empty columns, losing any data stored in them.
-  public async clearColumns(colRefs: number[], {keepType}: {keepType?: boolean} = {}): Promise<void> {
+  public async clearColumns(colRefs: number[], {keepType}: { keepType?: boolean } = {}): Promise<void> {
     await this.docModel.columns.sendTableAction(
       ['BulkUpdateRecord', colRefs, {
         isFormula: colRefs.map(f => true),
@@ -1003,7 +1049,7 @@ export class GristDoc extends DisposableWithEvents {
   }
 
   // Convert the given columns to data, saving the calculated values and unsetting the formulas.
-  public async convertIsFormula(colRefs: number[], opts: {toFormula: boolean, noRecalc?: boolean}): Promise<void> {
+  public async convertIsFormula(colRefs: number[], opts: { toFormula: boolean, noRecalc?: boolean }): Promise<void> {
     return this.docModel.columns.sendTableAction(
       ['BulkUpdateRecord', colRefs, {
         isFormula: colRefs.map(f => opts.toFormula),
@@ -1076,8 +1122,12 @@ export class GristDoc extends DisposableWithEvents {
     setAsActiveSection: boolean,
     silent: boolean = false): Promise<boolean> {
     try {
-      if (!cursorPos.sectionId) { throw new Error('sectionId required'); }
+      if (!cursorPos.sectionId) {
-      if (!cursorPos.rowId) { throw new Error('rowId required'); }
+        throw new Error('sectionId required');
+      }
+      if (!cursorPos.rowId) {
+        throw new Error('rowId required');
+      }
       const section = this.docModel.viewSections.getRowModel(cursorPos.sectionId);
       if (!section.id.peek()) {
         throw new Error(`Section ${cursorPos.sectionId} does not exist`);
@@ -1125,7 +1175,9 @@ export class GristDoc extends DisposableWithEvents {
           }
           srcRowId = srcTable.getRowIds().find(getFilterFunc(this.docData, query));
         }
-        if (!srcRowId || typeof srcRowId !== 'number') { throw new Error('cannot trace rowId'); }
+        if (!srcRowId || typeof srcRowId !== 'number') {
+          throw new Error('cannot trace rowId');
+        }
         await this.recursiveMoveToCursorPos({
           rowId: srcRowId,
           sectionId: srcSection.id.peek(),
@@ -1133,14 +1185,20 @@ export class GristDoc extends DisposableWithEvents {
       }
       const view: ViewRec = section.view.peek();
       const docPage: ViewDocPage = section.isRaw.peek() ? "data" : view.getRowId();
-      if (docPage != this.activeViewId.get()) { await this.openDocPage(docPage); }
+      if (docPage != this.activeViewId.get()) {
-      if (setAsActiveSection) { view.activeSectionId(cursorPos.sectionId); }
+        await this.openDocPage(docPage);
+      }
+      if (setAsActiveSection) {
+        view.activeSectionId(cursorPos.sectionId);
+      }
       const fieldIndex = cursorPos.fieldIndex;
       const viewInstance = await waitObs(section.viewInstance);
-      if (!viewInstance) { throw new Error('view not found'); }
+      if (!viewInstance) {
+        throw new Error('view not found');
+      }
       // Give any synchronous initial cursor setting a chance to happen.
       await delay(0);
-      viewInstance.setCursorPos({ ...cursorPos, fieldIndex });
+      viewInstance.setCursorPos({...cursorPos, fieldIndex});
       // TODO: column selection not working on card/detail view, or getting overridden -
       // look into it (not a high priority for now since feature not easily discoverable
       // in this view).
@@ -1162,7 +1220,7 @@ export class GristDoc extends DisposableWithEvents {
    * Opens up an editor at cursor position
    * @param input Optional. Cell's initial value
    */
-  public async activateEditorAtCursor(options?: { init?: string, state?: any}) {
+  public async activateEditorAtCursor(options?: { init?: string, state?: any }) {
     const view = await this._waitForView();
     view?.activateEditorAtCursor(options);
   }
@@ -1183,7 +1241,9 @@ export class GristDoc extends DisposableWithEvents {
    */
   public async openPopup(hash: HashLink) {
     // We can only open a popup for a section.
-    if (!hash.sectionId) { return; }
+    if (!hash.sectionId) {
+      return;
+    }
     // We might open popup either for a section in this view or some other section (like Raw Data Page).
     if (this.viewModel.viewSections.peek().peek().some(s => s.id.peek() === hash.sectionId)) {
       if (this.viewLayout) {
@@ -1196,7 +1256,7 @@ export class GristDoc extends DisposableWithEvents {
         const fieldIndex = activeSection.viewFields.peek().all().findIndex(f => f.colRef.peek() === hash.colRef);
         if (fieldIndex >= 0) {
           const view = await this._waitForView(activeSection);
-          view?.setCursorPos({ sectionId: hash.sectionId, rowId: hash.rowId, fieldIndex });
+          view?.setCursorPos({sectionId: hash.sectionId, rowId: hash.rowId, fieldIndex});
         }
       }
       this.viewLayout?.maximized.set(hash.sectionId);
@@ -1219,17 +1279,23 @@ export class GristDoc extends DisposableWithEvents {
       viewSection: popupSection,
       close: () => {
         // In case we are already close, do nothing.
-        if (!this._rawSectionOptions.get()) { return; }
+        if (!this._rawSectionOptions.get()) {
+          return;
+        }
         if (popupSection !== prevSection) {
           // We need to blur raw view section. Otherwise it will automatically be opened
           // on raw data view. Note: raw data section doesn't have its own view, it uses
           // empty row model as a parent (which feels like a hack).
-          if (!popupSection.isDisposed()) { popupSection.hasFocus(false); }
+          if (!popupSection.isDisposed()) {
+            popupSection.hasFocus(false);
+          }
           // We need to restore active viewSection for a view that we borrowed.
           // When this popup was opened we tricked active view by setting its activeViewSection
           // to our viewSection (which might be a completely diffrent section or a raw data section) not
           // connected to this view.
-          if (!prevSection.isDisposed()) { prevSection.hasFocus(true); }
+          if (!prevSection.isDisposed()) {
+            prevSection.hasFocus(true);
+          }
         }
         // Clearing popup data will close this popup.
         this._rawSectionOptions.set(null);
@@ -1240,7 +1306,7 @@ export class GristDoc extends DisposableWithEvents {
       const fieldIndex = popupSection.viewFields.peek().all().findIndex(f => f.colRef.peek() === hash.colRef);
       if (fieldIndex >= 0) {
         const view = await this._waitForView(popupSection);
-        view?.setCursorPos({ sectionId: hash.sectionId, rowId: hash.rowId, fieldIndex });
+        view?.setCursorPos({sectionId: hash.sectionId, rowId: hash.rowId, fieldIndex});
       }
     }
   }
@@ -1250,7 +1316,9 @@ export class GristDoc extends DisposableWithEvents {
    */
   public async playRickRollVideo() {
     const backgroundVideoPlayer = this._backgroundVideoPlayerHolder.get();
-    if (!backgroundVideoPlayer) { return; }
+    if (!backgroundVideoPlayer) {
+      return;
+    }
 
     await backgroundVideoPlayer.isLoaded();
     backgroundVideoPlayer.play();
@@ -1272,7 +1340,9 @@ export class GristDoc extends DisposableWithEvents {
     await setVolume(0, 100, 5);
 
     await delay(190 * 1000);
-    if (!this._isRickRowing.get()) { return; }
+    if (!this._isRickRowing.get()) {
+      return;
+    }
 
     await setVolume(100, 0, 5);
 
@@ -1289,6 +1359,7 @@ export class GristDoc extends DisposableWithEvents {
     if (!sectionToCheck.getRowId()) {
       return null;
     }
+
     async function singleWait(s: ViewSectionRec): Promise<BaseView> {
       const view = await waitObs(
         sectionToCheck.viewInstance,
@@ -1296,6 +1367,7 @@ export class GristDoc extends DisposableWithEvents {
       );
       return view!;
     }
+
     let view = await singleWait(sectionToCheck);
     if (view.isDisposed()) {
       // If the view is disposed (it can happen, as wait is not reliable enough, because it uses
@@ -1350,7 +1422,9 @@ export class GristDoc extends DisposableWithEvents {
     await commands.allCommands.rightPanelOpen.run();
 
     const editLayoutButton = document.querySelector('.behavioral-prompt-edit-card-layout');
-    if (!editLayoutButton) { throw new Error('GristDoc failed to find edit card layout button'); }
+    if (!editLayoutButton) {
+      throw new Error('GristDoc failed to find edit card layout button');
+    }
 
     this.behavioralPromptsManager.showTip(editLayoutButton, 'editCardLayout', {
       popupOptions: {
@@ -1424,7 +1498,7 @@ export class GristDoc extends DisposableWithEvents {
    * Helper called before an action is sent to the server. It saves cursor position to come back to
    * in case of Undo.
    */
-  private _onSendActionsStart(ev: {cursorPos: CursorPos}) {
+  private _onSendActionsStart(ev: { cursorPos: CursorPos }) {
     this._lastOwnActionGroup = null;
     ev.cursorPos = this.getCursorPos();
   }
@@ -1433,7 +1507,7 @@ export class GristDoc extends DisposableWithEvents {
    * Helper called when server responds to an action. It attaches the saved cursor position to the
    * received action (if any), and stores also the resulting position.
    */
-  private _onSendActionsEnd(ev: {cursorPos: CursorPos}) {
+  private _onSendActionsEnd(ev: { cursorPos: CursorPos }) {
     const a = this._lastOwnActionGroup;
     if (a) {
       a.cursorPos = ev.cursorPos;
@@ -1445,15 +1519,15 @@ export class GristDoc extends DisposableWithEvents {
 
   private _getDocApiDownloadParams() {
     const filters = this.viewModel.activeSection.peek().activeFilters.get().map(filterInfo => ({
-      colRef : filterInfo.fieldOrColumn.origCol().origColRef(),
+      colRef: filterInfo.fieldOrColumn.origCol().origColRef(),
-      filter : filterInfo.filter()
+      filter: filterInfo.filter()
     }));
 
     const params = {
       viewSection: this.viewModel.activeSectionId(),
       tableId: this.viewModel.activeSection().table().tableId(),
       activeSortSpec: JSON.stringify(this.viewModel.activeSection().activeSortSpec()),
-      filters : JSON.stringify(filters),
+      filters: JSON.stringify(filters),
     };
     return params;
   }
@@ -1485,10 +1559,14 @@ export class GristDoc extends DisposableWithEvents {
 
   private async _getTableData(section: ViewSectionRec): Promise<TableData> {
     const viewInstance = await waitObs(section.viewInstance);
-    if (!viewInstance) { throw new Error('view not found'); }
+    if (!viewInstance) {
+      throw new Error('view not found');
+    }
     await viewInstance.getLoadingDonePromise();
     const table = this.docData.getTable(section.table.peek().tableId.peek());
-    if (!table) { throw new Error('no section table'); }
+    if (!table) {
+      throw new Error('no section table');
+    }
     return table;
   }
 
@@ -1496,13 +1574,15 @@ export class GristDoc extends DisposableWithEvents {
    * Convert a url hash to a cursor position.
    */
   private _getCursorPosFromHash(hash: HashLink): CursorPos {
-    const cursorPos: CursorPos = { rowId: hash.rowId, sectionId: hash.sectionId };
+    const cursorPos: CursorPos = {rowId: hash.rowId, sectionId: hash.sectionId};
-    if (cursorPos.sectionId != undefined && hash.colRef !== undefined){
+    if (cursorPos.sectionId != undefined && hash.colRef !== undefined) {
       // translate colRef to a fieldIndex
       const section = this.docModel.viewSections.getRowModel(cursorPos.sectionId);
       const fieldIndex = section.viewFields.peek().all()
-          .findIndex(x=> x.colRef.peek() == hash.colRef);
+        .findIndex(x => x.colRef.peek() == hash.colRef);
-      if (fieldIndex >= 0) { cursorPos.fieldIndex = fieldIndex; }
+      if (fieldIndex >= 0) {
+        cursorPos.fieldIndex = fieldIndex;
+      }
     }
     return cursorPos;
   }
@@ -1556,7 +1636,9 @@ export class GristDoc extends DisposableWithEvents {
     const viewFields = viewSection.viewFields.peek().peek();
 
     // If no y-series, then simply return.
-    if (viewFields.length === 1) { return; }
+    if (viewFields.length === 1) {
+      return;
+    }
 
     const field = viewSection.viewFields.peek().peek()[1];
     if (isNumericOnly(viewSection.chartTypeDef.peek()) &&
@@ -1580,10 +1662,28 @@ export class GristDoc extends DisposableWithEvents {
       await this.docModel.viewFields.sendTableActions(actions);
     }
   }
+
+  private _handleTriggerQueueOverflowMessage() {
+    this.listenTo(this, 'webhookOverflowError', (err: any) => {
+      this.app.topAppModel.notifier.createNotification({
+        message: err.toString(),
+        canUserClose: false,
+        level: "error",
+        badgeCounter: true,
+        expireSec: 5,
+        key: 'webhookOverflowError',
+        actions: [{
+          label: t('go to webhook settings'), action: async () => {
+            await urlState().pushUrl({docPage: 'webhook'});
+          }
+        }]
+      });
+    });
+  }
 }
 
 async function finalizeAnchor() {
-  await urlState().pushUrl({ hash: {} }, { replace: true });
+  await urlState().pushUrl({hash: {}}, {replace: true});
   setTestState({anchorApplied: true});
 }
 

app/client/models/DocPageModel.ts

@@ -266,7 +266,7 @@ export class DocPageModelImpl extends Disposable implements DocPageModel {
         explanation: (
           isDocOwner
             ? t("You can try reloading the document, or using recovery mode. \
-Recovery mode opens the document to be fully accessible to owners, and inaccessible to others. \
+              Recovery mode opens the document to be fully accessible to owners, and inaccessible to others. \
 It also disables formulas. [{{error}}]", {error: err.message})
             : isDenied
               ? t('Sorry, access to this document has been denied. [{{error}}]', {error: err.message})

app/client/models/NotifyModel.ts

@@ -1,14 +1,25 @@
 import * as log from 'app/client/lib/log';
 import {ConnectState, ConnectStateManager} from 'app/client/models/ConnectState';
+import {isNarrowScreenObs, testId} from 'app/client/ui2018/cssVars';
 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 {
-import {Computed, dom, DomElementArg, MutableObsArray, obsArray, Observable} from 'grainjs';
+  bundleChanges,
+  Computed,
+  Disposable,
+  dom,
+  DomElementArg,
+  Holder,
+  IDisposable,
+  IDisposableOwner,
+  MutableObsArray,
+  obsArray,
+  Observable
+} from 'grainjs';
 import clamp = require('lodash/clamp');
 import defaults = require('lodash/defaults');
-import {isNarrowScreenObs, testId} from 'app/client/ui2018/cssVars';
 
 // When rendering app errors, we'll only show the last few.
 const maxAppErrors = 5;
@@ -79,9 +90,11 @@ export class Expirable extends Disposable {
   /**
    * Sets status to 'expiring', then calls dispose after a short delay.
    */
-  public async expire(): Promise<void> {
+  public async expire(withoutDelay: boolean = false): Promise<void> {
     this.status.set('expiring');
+    if(!withoutDelay) {
       await delay(Expirable.fadeDelay);
+    }
     if (!this.isDisposed()) {
       this.dispose();
     }
@@ -339,7 +352,7 @@ export class Notifier extends Disposable implements INotifier {
     if (key) {
       const prev = this._keyedItems.get(key);
       if (prev) {
-        await prev.expire();
+        await prev.expire(true);
       }
       this._keyedItems.set(key, n);
       n.onDispose(() => this.isDisposed() || this._keyedItems.delete(key));

app/client/ui/WebhookPage.ts

@@ -1,19 +1,26 @@
-import { GristDoc } from 'app/client/components/GristDoc';
+import {GristDoc} from 'app/client/components/GristDoc';
-import { ViewSectionHelper } from 'app/client/components/ViewLayout';
+import {ViewSectionHelper} from 'app/client/components/ViewLayout';
-import { makeT } from 'app/client/lib/localization';
+import {makeT} from 'app/client/lib/localization';
-import { reportMessage, reportSuccess } from 'app/client/models/errors';
+import {reportMessage, reportSuccess} from 'app/client/models/errors';
-import { IEdit, IExternalTable, VirtualTable } from 'app/client/models/VirtualTable';
+import {IEdit, IExternalTable, VirtualTable} from 'app/client/models/VirtualTable';
-import { docListHeader } from 'app/client/ui/DocMenuCss';
+import {docListHeader} from 'app/client/ui/DocMenuCss';
-import { bigPrimaryButton } from 'app/client/ui2018/buttons';
+import {bigPrimaryButton} from 'app/client/ui2018/buttons';
-import { mediaSmall, testId } from 'app/client/ui2018/cssVars';
+import {mediaSmall, testId} from 'app/client/ui2018/cssVars';
-import { ApiError } from 'app/common/ApiError';
+import {ApiError} from 'app/common/ApiError';
-import { DisposableWithEvents } from 'app/common/DisposableWithEvents';
+import {DisposableWithEvents} from 'app/common/DisposableWithEvents';
-import { DocAction, getColIdsFromDocAction, getColValues,
+import {
-         isDataAction, TableDataAction, UserAction } from 'app/common/DocActions';
+  DocAction,
-import { WebhookSummary } from 'app/common/Triggers';
+  getColIdsFromDocAction,
-import { DocAPI } from 'app/common/UserAPI';
+  getColValues,
-import { GristObjCode, RowRecord } from 'app/plugin/GristData';
+  isDataAction,
-import { dom, styled } from 'grainjs';
+  TableDataAction,
+  UserAction
+} from 'app/common/DocActions';
+import {WebhookSummary} from 'app/common/Triggers';
+import {DocAPI} from 'app/common/UserAPI';
+import {GristObjCode, RowRecord} from 'app/plugin/GristData';
+import {dom, styled} from 'grainjs';
+import {observableArray, ObservableArray} from "knockout";
 import omit = require('lodash/omit');
 import pick = require('lodash/pick');
 import range = require('lodash/range');
@@ -122,11 +129,14 @@ class WebhookExternalTable implements IExternalTable {
   public saveableFields = [
     'tableId', 'url', 'eventTypes', 'enabled', 'name', 'memo', 'isReadyColumn',
   ];
+  public webhooks: ObservableArray<WebhookSummary> =  observableArray<WebhookSummary>([]);
 
-  public constructor(private _docApi: DocAPI) {}
+  public constructor(private _docApi: DocAPI) {
+  }
 
   public async fetchAll(): Promise<TableDataAction> {
     const webhooks = await this._docApi.getWebhooks();
+    this._initalizeWebhookList(webhooks);
     const indices = range(webhooks.length);
     return ['TableData', this.name, indices.map(i => i + 1),
       getColValues(indices.map(rowId => _mapWebhookValues(webhooks[rowId])))];
@@ -136,7 +146,9 @@ class WebhookExternalTable implements IExternalTable {
     const results = editor.actions;
     for (const r of results) {
       for (const d of r.stored) {
-        if (!isDataAction(d)) { continue; }
+        if (!isDataAction(d)) {
+          continue;
+        }
         const colIds = new Set(getColIdsFromDocAction(d) || []);
         if (colIds.has('webhookId') || colIds.has('status')) {
           throw new Error(`Sorry, not all fields can be edited.`);
@@ -146,7 +158,9 @@ class WebhookExternalTable implements IExternalTable {
     const delta = editor.delta;
     for (const recId of delta.removeRows) {
       const rec = editor.getRecord(recId);
-      if (!rec) { continue; }
+      if (!rec) {
+        continue;
+      }
       await this._removeWebhook(rec);
       reportMessage(`Removed webhook.`);
     }
@@ -159,13 +173,16 @@ class WebhookExternalTable implements IExternalTable {
       }
     }
   }
+
   public async afterEdit(editor: IEdit) {
     const {delta} = editor;
     const updates = new Set(delta.updateRows);
     const addsAndUpdates = new Set([...delta.addRows, ...delta.updateRows]);
     for (const recId of addsAndUpdates) {
       const rec = editor.getRecord(recId);
-      if (!rec) { continue; }
+      if (!rec) {
+        continue;
+      }
       const notes: string[] = [];
       const values: Record<string, any> = {};
       if (!rec.webhookId) {
@@ -192,6 +209,12 @@ class WebhookExternalTable implements IExternalTable {
     }
   }
 
+  private _initalizeWebhookList(webhooks: WebhookSummary[]){
+
+    this.webhooks.removeAll();
+    this.webhooks.push(...webhooks);
+  }
+
   public async sync(editor: IEdit): Promise<void> {
     // Map from external webhookId to local arbitrary rowId.
     const rowMap = new Map(editor.getRowIds().map(rowId => [editor.getRecord(rowId)!.webhookId, rowId]));
@@ -206,6 +229,7 @@ class WebhookExternalTable implements IExternalTable {
     // webhooks, or that "updating" something that hasn't actually
     // changed is not disruptive.
     const webhooks = await this._docApi.getWebhooks();
+    this._initalizeWebhookList(webhooks);
     for (const webhook of webhooks) {
       const values = _mapWebhookValues(webhook);
       const rowId = rowMap.get(webhook.id);
@@ -296,16 +320,22 @@ export class WebhookPage extends DisposableWithEvents {
 
   public docApi = this.gristDoc.docPageModel.appModel.api.getDocAPI(this.gristDoc.docId());
   public sharedTable: VirtualTable;
+  private _webhookExternalTable: WebhookExternalTable;
+
 
   constructor(public gristDoc: GristDoc) {
     super();
-
+    //this._webhooks = observableArray<WebhookSummary>();
-    const table = new VirtualTable(this, gristDoc, new WebhookExternalTable(this.docApi));
+    this._webhookExternalTable = new WebhookExternalTable(this.docApi);
+    const table = new VirtualTable(this, gristDoc, this._webhookExternalTable);
     this.listenTo(gristDoc, 'webhooks', async () => {
       await table.lazySync();
+
     });
   }
 
+
+
   public buildDom() {
     const viewSectionModel = this.gristDoc.docModel.viewSections.getRowModel('vt_webhook_fs1' as any);
     ViewSectionHelper.create(this, this.gristDoc, viewSectionModel);
@@ -315,7 +345,7 @@ export class WebhookPage extends DisposableWithEvents {
         bigPrimaryButton(t("Clear Queue"),
           dom.on('click', () => this.reset()),
           testId('webhook-reset'),
-                        ),
+        )
       ),
       // active_section here is a bit of a hack, to allow tests to run
       // more easily.
@@ -327,6 +357,11 @@ export class WebhookPage extends DisposableWithEvents {
     await this.docApi.flushWebhooks();
     reportSuccess('Cleared webhook queue.');
   }
+
+  public async resetSelected(id: string) {
+    await this.docApi.flushWebhook(id);
+    reportSuccess(`Cleared webhook ${id} queue.`);
+  }
 }
 
 const cssHeader = styled(docListHeader, `
@@ -377,7 +412,7 @@ function _prepareWebhookInitialActions(tableId: string): DocAction[] {
     }))
   ], [
     // Add an entry for the virtual table.
-    'AddRecord', '_grist_Tables', 'vt_webhook_ft1' as any, { tableId, primaryViewId: 0 },
+    'AddRecord', '_grist_Tables', 'vt_webhook_ft1' as any, {tableId, primaryViewId: 0},
   ], [
     // Add entries for the columns of the virtual table.
     'BulkAddRecord', '_grist_Tables_column',
@@ -391,10 +426,10 @@ function _prepareWebhookInitialActions(tableId: string): DocAction[] {
   ], [
     // Add a view section.
     'AddRecord', '_grist_Views_section', 'vt_webhook_fs1' as any,
-      { tableRef: 'vt_webhook_ft1', parentKey: 'detail', title: '', borderWidth: 1, defaultWidth: 100, theme: 'blocks' }
+    {tableRef: 'vt_webhook_ft1', parentKey: 'detail', title: '', borderWidth: 1, defaultWidth: 100, theme: 'blocks'}
   ], [
     // List the fields shown in the view section.
-    'BulkAddRecord', '_grist_Views_section_field', WEBHOOK_VIEW_FIELDS.map((_, i) => `vt_webhook_ff${i+1}`) as any, {
+    'BulkAddRecord', '_grist_Views_section_field', WEBHOOK_VIEW_FIELDS.map((_, i) => `vt_webhook_ff${i + 1}`) as any, {
       colRef: WEBHOOK_VIEW_FIELDS.map(colId => WEBHOOK_COLUMNS.find(r => r.colId === colId)!.id),
       parentId: WEBHOOK_VIEW_FIELDS.map(() => 'vt_webhook_fs1'),
       parentPos: WEBHOOK_VIEW_FIELDS.map((_, i) => i),

app/common/CommTypes.ts

@@ -2,8 +2,8 @@ import {ActionGroup} from 'app/common/ActionGroup';
 import {DocAction} from 'app/common/DocActions';
 import {FilteredDocUsageSummary} from 'app/common/DocUsage';
 import {Product} from 'app/common/Features';
-import {StringUnion} from 'app/common/StringUnion';
 import {UserProfile} from 'app/common/LoginSessionAPI';
+import {StringUnion} from 'app/common/StringUnion';
 
 export const ValidEvent = StringUnion(
   'docListAction', 'docUserAction', 'docShutdown', 'docError',
@@ -90,11 +90,17 @@ export interface CommDocUserAction extends CommMessageBase {
   };
 }
 
+
+export enum WebhookMessageType {
+  Update = 'webhookUpdate',
+  Overflow = 'webhookOverflowError'
+}
 export interface CommDocChatter extends CommMessageBase {
   type: 'docChatter';
   docFD: number;
   data: {
     webhooks?: {
+      type: WebhookMessageType,
       // If present, something happened related to webhooks.
       // Currently, we give no details, leaving it to client
       // to call back for details if it cares.

app/common/UserAPI.ts

@@ -4,18 +4,18 @@ import {AssistanceRequest, AssistanceResponse} from 'app/common/AssistancePrompt
 import {BaseAPI, IOptions} from 'app/common/BaseAPI';
 import {BillingAPI, BillingAPIImpl} from 'app/common/BillingAPI';
 import {BrowserSettings} from 'app/common/BrowserSettings';
+import {ICustomWidget} from 'app/common/CustomWidget';
 import {BulkColValues, TableColValues, TableRecordValue, TableRecordValues, UserAction} from 'app/common/DocActions';
 import {DocCreationInfo, OpenDocMode} from 'app/common/DocListAPI';
 import {OrgUsageSummary} from 'app/common/DocUsage';
 import {Product} from 'app/common/Features';
-import {ICustomWidget} from 'app/common/CustomWidget';
 import {isClient} from 'app/common/gristUrls';
+import {encodeQueryParams} from 'app/common/gutil';
 import {FullUser, UserProfile} from 'app/common/LoginSessionAPI';
 import {OrgPrefs, UserOrgPrefs, UserPrefs} from 'app/common/Prefs';
 import * as roles from 'app/common/roles';
-import {addCurrentOrgToPath} from 'app/common/urlUtils';
-import {encodeQueryParams} from 'app/common/gutil';
 import {WebhookFields, WebhookSubscribe, WebhookSummary, WebhookUpdate} from 'app/common/Triggers';
+import {addCurrentOrgToPath} from 'app/common/urlUtils';
 import omitBy from 'lodash/omitBy';
 
 
@@ -463,6 +463,7 @@ export interface DocAPI {
   // Update webhook
   updateWebhook(webhook: WebhookUpdate): Promise<void>;
   flushWebhooks(): Promise<void>;
+  flushWebhook(webhookId: string): Promise<void>;
 
   getAssistance(params: AssistanceRequest): Promise<AssistanceResponse>;
 }
@@ -949,6 +950,12 @@ export class DocAPIImpl extends BaseAPI implements DocAPI {
     });
   }
 
+  public async flushWebhook(id: string): Promise<void> {
+    await this.request(`${this._url}/webhooks/queue/${id}`, {
+      method: 'DELETE'
+    });
+  }
+
   public async forceReload(): Promise<void> {
     await this.request(`${this._url}/force-reload`, {
       method: 'POST'

app/server/lib/ActiveDoc.ts

@@ -35,6 +35,7 @@ import {
 import {ApiError} from 'app/common/ApiError';
 import {mapGetOrSet, MapWithTTL} from 'app/common/AsyncCreate';
 import {AttachmentColumns, gatherAttachmentIds, getAttachmentColumns} from 'app/common/AttachmentColumns';
+import {WebhookMessageType} from 'app/common/CommTypes';
 import {
   BulkAddRecord,
   BulkRemoveRecord,
@@ -129,8 +130,7 @@ import {createAttachmentsIndex, DocStorage, REMOVE_UNUSED_ATTACHMENTS_DELAY} fro
 import {expandQuery} from './ExpandedQuery';
 import {GranularAccess, GranularAccessForBundle} from './GranularAccess';
 import {OnDemandActions} from './OnDemandActions';
-import {getLogMetaFromDocSession, getPubSubPrefix, getTelemetryMetaFromDocSession,
+import {getLogMetaFromDocSession, getPubSubPrefix, getTelemetryMetaFromDocSession, timeoutReached} from './serverUtils';
-        timeoutReached} from './serverUtils';
 import {findOrAddAllEnvelope, Sharing} from './Sharing';
 import cloneDeep = require('lodash/cloneDeep');
 import flatten = require('lodash/flatten');
@@ -1769,6 +1769,10 @@ export class ActiveDoc extends EventEmitter {
     await this._triggers.clearWebhookQueue();
   }
 
+  public async clearSingleWebhookQueue(webhookId: string) {
+    await this._triggers.clearSingleWebhookQueue(webhookId);
+  }
+
   /**
    * Returns the list of outgoing webhook for a table in this document.
    */
@@ -1778,13 +1782,13 @@ export class ActiveDoc extends EventEmitter {
 
   /**
    * Send a message to clients connected to the document that something
-   * webhook-related has happened (a change in configuration, or a
+   * webhook-related has happened (a change in configuration, a delivery,
-   * delivery, or an error). There is room to give details in future,
+   * or an error). It passes information about the type of event (currently data being updated in some way
-   * if that proves useful, but for now no details are needed.
+   * or an OverflowError, i.e., too many events waiting to be sent). More data may be added when necessary.
    */
-  public async sendWebhookNotification() {
+  public async sendWebhookNotification(type: WebhookMessageType = WebhookMessageType.Update) {
     await this.docClients.broadcastDocMessage(null, 'docChatter', {
-      webhooks: {},
+      webhooks: {type},
     });
   }
 

app/server/lib/DocApi.ts

@@ -763,6 +763,16 @@ export class DocWorkerApi {
 
 
 
+    // Clears a single webhook in the queue for this document.
+    this._app.delete('/api/docs/:docId/webhooks/queue/:webhookId', isOwner,
+      withDoc(async (activeDoc, req, res) => {
+        const webhookId = req.params.webhookId;
+        await activeDoc.clearSingleWebhookQueue(webhookId);
+        await activeDoc.sendWebhookNotification();
+        res.json({success: true});
+      })
+    );
+
     // Lists all webhooks and their current status in the document.
     this._app.get('/api/docs/:docId/webhooks', isOwner,
       withDoc(async (activeDoc, req, res) => {

app/server/lib/Triggers.ts

@@ -3,6 +3,7 @@ import {summarizeAction} from 'app/common/ActionSummarizer';
 import {ActionSummary, TableDelta} from 'app/common/ActionSummary';
 import {ApiError} from 'app/common/ApiError';
 import {MapWithTTL} from 'app/common/AsyncCreate';
+import {WebhookMessageType} from "app/common/CommTypes";
 import {fromTableDataAction, RowRecord, TableColValues, TableDataAction} from 'app/common/DocActions';
 import {StringUnion} from 'app/common/StringUnion';
 import {MetaRowRecord} from 'app/common/TableData';
@@ -234,7 +235,9 @@ export class DocTriggers {
 
     // Prevent further document activity while the queue is too full.
     while (this._drainingQueue && !this._shuttingDown) {
-      await delayAbort(1000, this._loopAbort?.signal);
+      const sendNotificationPromise =  this._activeDoc.sendWebhookNotification(WebhookMessageType.Overflow);
+      const delayPromise = delayAbort(5000, this._loopAbort?.signal);
+      await Promise.all([sendNotificationPromise, delayPromise]);
     }
 
     return summary;
@@ -335,6 +338,36 @@ export class DocTriggers {
     await this._stats.clear();
   }
 
+  public async clearSingleWebhookQueue(webhookId: string) {
+    // Make sure we are after start and in sync with redis.
+    if (this._getRedisQueuePromise) {
+      await this._getRedisQueuePromise;
+    }
+    // Clear in-memory queue for given webhook key.
+    let removed = 0;
+    for(let i=0; i< this._webHookEventQueue.length; i++){
+      if(this._webHookEventQueue[i].id == webhookId){
+        this._webHookEventQueue.splice(i, 1);
+        removed++;
+      }
+    }
+    // Notify the loop that it should restart.
+    this._loopAbort?.abort();
+    // If we have backup in redis, clear it also.
+    // NOTE: this is subject to a race condition, currently it is not possible, but any future modification probably
+    // will require some kind of locking over the queue (or a rewrite)
+    if (removed && this._redisClient) {
+      const multi = this._redisClient.multi();
+      multi.del(this._redisQueueKey);
+
+      // Re-add all the remaining events to the queue.
+      const strings = this._webHookEventQueue.map(e => JSON.stringify(e));
+      multi.rpush(this._redisQueueKey, ...strings);
+      await multi.execAsync();
+    }
+    await this._stats.clear();
+  }
+
   // Converts a table to tableId by looking it up in _grist_Tables.
   private _getTableId(rowId: number) {
     const docData = this._activeDoc.docData;

buildtools/fly-template.toml

@@ -7,6 +7,7 @@ processes = []
   APP_DOC_URL="https://{APP_NAME}.fly.dev"
   APP_HOME_URL="https://{APP_NAME}.fly.dev"
   APP_STATIC_URL="https://{APP_NAME}.fly.dev"
+  ALLOWED_WEBHOOK_DOMAINS="webhook.site"
   GRIST_SINGLE_ORG="docs"
   PORT = "8080"
   FLY_DEPLOY_EXPIRATION = "{FLY_DEPLOY_EXPIRATION}"

test/nbrowser/WebhookOverflow.ts

@@ -0,0 +1,117 @@
+import {DocCreationInfo} from 'app/common/DocListAPI';
+import {DocAPI} from 'app/common/UserAPI';
+import {assert, driver, Key} from 'mocha-webdriver';
+import * as gu from 'test/nbrowser/gristUtils';
+import {server, setupTestSuite} from 'test/nbrowser/testUtils';
+import {EnvironmentSnapshot} from 'test/server/testUtils';
+import {WebhookFields} from "../../app/common/Triggers";
+
+describe('WebhookOverflow', function () {
+  this.timeout(30000);
+  const cleanup = setupTestSuite();
+  let session: gu.Session;
+  let oldEnv: EnvironmentSnapshot;
+  let doc: DocCreationInfo;
+  let docApi: DocAPI;
+
+  before(async function () {
+    oldEnv = new EnvironmentSnapshot();
+    //host = new URL(server.getHost()).host;
+    process.env.ALLOWED_WEBHOOK_DOMAINS = '*';
+    process.env.GRIST_MAX_QUEUE_SIZE = '2';
+    await server.restart();
+    session = await gu.session().teamSite.login();
+    const api = session.createHomeApi();
+    doc = await session.tempDoc(cleanup, 'Hello.grist');
+    docApi = api.getDocAPI(doc.id);
+    await api.applyUserActions(doc.id, [
+      ['AddTable', 'Table2', [{id: 'A'}, {id: 'B'}, {id: 'C'}, {id: 'D'}, {id: 'E'}]],
+    ]);
+    const webhookDetails: WebhookFields = {
+      url: 'https://localhost/WrongWebhook',
+      eventTypes: ["add", "update"],
+      enabled: true,
+      name: 'test webhook',
+      tableId: 'Table2',
+    };
+    await docApi.addWebhook(webhookDetails);
+  });
+
+  after(async function () {
+    oldEnv.restore();
+    await server.restart();
+  });
+
+  async function enterCellWithoutWaitingOnServer(...keys: string[]) {
+    const lastKey = keys[keys.length - 1];
+    if (![Key.ENTER, Key.TAB, Key.DELETE].includes(lastKey)) {
+      keys.push(Key.ENTER);
+    }
+    await driver.sendKeys(...keys);
+  }
+
+  it('should show a message when overflown', async function () {
+    await gu.openPage('Table2');
+    await gu.getCell('A', 1).click();
+    await gu.enterCell('123');
+    await gu.getCell('B', 1).click();
+    await enterCellWithoutWaitingOnServer('124');
+    const toast = await driver.wait(() => gu.getToasts(), 10000);
+    assert.include(toast, 'New changes are temporarily suspended. Webhooks queue overflowed.' +
+      ' Please check webhooks settings, remove invalid webhooks, and clean the queue.\ngo to webhook settings');
+  });
+
+  it('message should disappear after clearing queue', async function () {
+    await openWebhookPageWithoutWaitForServer();
+    await driver.findContent('button', /Clear Queue/).click();
+    await gu.waitForServer();
+    await waitForOverflownMessageToDisappear();
+    const toast = await driver.wait(() => gu.getToasts());
+    assert.notInclude(toast, 'New changes are temporarily suspended. Webhooks queue overflowed.' +
+      ' Please check webhooks settings, remove invalid webhooks, and clean the queue.\ngo to webhook settings');
+  });
+});
+
+async function waitForOverflownMessageToDisappear(maxWait = 12500) {
+  await driver.wait(async () => {
+    try {
+      for (;;) {
+        const toasts = await gu.getToasts();
+        const filteredToasts = toasts.find(t => t=='New changes are temporarily suspended. Webhooks queue overflowed.' +
+          ' Please check webhooks settings, remove invalid webhooks, and clean the queue.\ngo to webhook settings');
+        if (!filteredToasts) {
+          return true;
+        }
+      }
+    } catch (e) {
+      return false;
+    }
+  }, maxWait, 'Overflown message did not disappear');
+}
+
+async function openWebhookPageWithoutWaitForServer() {
+  await openDocumentSettings();
+  const button = await driver.findContentWait('a', /Manage Webhooks/, 3000);
+  await gu.scrollIntoView(button).click();
+  await waitForWebhookPage();
+}
+
+async function waitForWebhookPage() {
+  await driver.findContentWait('button', /Clear Queue/, 3000);
+  // No section, so no easy utility for setting focus. Click on a random cell.
+  await gu.getDetailCell({col: 'Webhook Id', rowNum: 1}).click();
+}
+
+export async function openAccountMenu() {
+  await driver.findWait('.test-dm-account', 1000).click();
+  // Since the AccountWidget loads orgs and the user data asynchronously, the menu
+  // can expand itself causing the click to land on a wrong button.
+  await driver.findWait('.test-site-switcher-org', 1000);
+  await driver.sleep(250);  // There's still some jitter (scroll-bar? other user accounts?)
+}
+
+export async function openDocumentSettings() {
+  await openAccountMenu();
+  await driver.findContent('.grist-floating-menu a', 'Document Settings').click();
+  await gu.waitForUrl(/settings/, 5000);
+}

test/nbrowser/WebhookPage.ts

@@ -1,11 +1,9 @@
-import { DocCreationInfo } from 'app/common/DocListAPI';
+import {DocCreationInfo} from 'app/common/DocListAPI';
-import { DocAPI } from 'app/common/UserAPI';
+import {DocAPI} from 'app/common/UserAPI';
-import { assert, driver, Key } from 'mocha-webdriver';
+import {assert, driver, Key} from 'mocha-webdriver';
 import * as gu from 'test/nbrowser/gristUtils';
-import { setupTestSuite } from 'test/nbrowser/testUtils';
+import {server, setupTestSuite} from 'test/nbrowser/testUtils';
-import { EnvironmentSnapshot } from 'test/server/testUtils';
+import {EnvironmentSnapshot} from 'test/server/testUtils';
-import { server } from 'test/nbrowser/testUtils';
-//import { Deps as TriggersDeps } from 'app/server/lib/Triggers';
 
 describe('WebhookPage', function () {
   this.timeout(60000);