Scheduler: refactor Header module

packages/devextreme/eslint.config.mjs

@@ -579,6 +579,25 @@ export default [
             'devextreme-custom/no-deferred': 'off',
         },
     },
+    // Strict TypeScript rules for scheduler/header
+    {
+        files: ['js/__internal/scheduler/header/**/*.ts?(x)'],
+        languageOptions: {
+            parser: tsParser,
+            ecmaVersion: 5,
+            sourceType: 'script',
+            parserOptions: {
+                project: './tsconfig.json',
+                tsconfigRootDir: `${__dirname}/js/__internal`,
+            },
+        },
+        rules: {
+            '@typescript-eslint/no-explicit-any': 'error',
+            '@typescript-eslint/explicit-function-return-type': 'error',
+            '@typescript-eslint/no-unsafe-return': 'error',
+            '@typescript-eslint/explicit-module-boundary-types': 'error',
+        },
+    },
     // Rules for grid controls
     {
         files: [

packages/devextreme/js/__internal/scheduler/header/m_calendar.ts

@@ -1,62 +1,66 @@
 import registerComponent from '@js/core/component_registrator';
 import devices from '@js/core/devices';
+import type { dxElementWrapper } from '@js/core/renderer';
 import $ from '@js/core/renderer';
-import Calendar from '@js/ui/calendar';
+import type { DateLike } from '@js/ui/calendar';
 import Popover from '@js/ui/popover/ui.popover';
 import Popup from '@js/ui/popup/ui.popup';
-import type { dxSchedulerOptions } from '@js/ui/scheduler';
-import Scrollable from '@js/ui/scroll_view/ui.scrollable';
-import Widget from '@js/ui/widget/ui.widget';
+import Widget from '@ts/core/widget/widget';
+import type { KeyboardKeyDownEvent } from '@ts/events/core/m_keyboard_processor';
+import type { CalendarProperties } from '@ts/ui/calendar/calendar';
+import Calendar from '@ts/ui/calendar/calendar';
+import Scrollable from '@ts/ui/scroll_view/scrollable';
+
+import type { HeaderCalendarOptions } from './types';
 
 const CALENDAR_CLASS = 'dx-scheduler-navigator-calendar';
 const CALENDAR_POPOVER_CLASS = 'dx-scheduler-navigator-calendar-popover';
 
-export default class SchedulerCalendar extends Widget<dxSchedulerOptions> {
-  _overlay: any;
+export default class SchedulerCalendar extends Widget<HeaderCalendarOptions> {
+  _overlay?: Popup | Popover;
 
-  _calendar: any;
+  _calendar?: Calendar;
 
-  show(target) {
-    if (!this._isMobileLayout()) {
-      this._overlay.option('target', target);
+  async show(target: HTMLElement): Promise<void> {
+    if (!SchedulerCalendar._isMobileLayout()) {
+      this._overlay?.option('target', target);
     }
-    this._overlay.show();
+
+    await this._overlay?.show();
   }
 
-  hide() {
-    this._overlay.hide();
+  async hide(): Promise<void> {
+    await this._overlay?.hide();
   }
 
-  _keyboardHandler(opts): void {
+  _keyboardHandler(opts: KeyboardKeyDownEvent): boolean {
     this._calendar?._keyboardHandler(opts);
+    return true;
   }
 
   _init(): void {
-    // @ts-expect-error
     super._init();
     this.$element();
   }
 
   _render(): void {
-    // @ts-expect-error
     super._render();
     this._renderOverlay();
   }
 
   _renderOverlay(): void {
     this.$element().addClass(CALENDAR_POPOVER_CLASS);
 
-    const isMobileLayout = this._isMobileLayout();
+    const isMobileLayout = SchedulerCalendar._isMobileLayout();
 
-    const overlayType = isMobileLayout ? Popup : Popover;
-
-    // @ts-expect-error
-    this._overlay = this._createComponent(this.$element(), overlayType, {
-      contentTemplate: () => this._createOverlayContent(),
-      onShown: () => this._calendar.focus(),
+    const overlayConfig = {
+      contentTemplate: (): dxElementWrapper => this._createOverlayContent(),
+      onShown: (): void => {
+        this._calendar?.focus();
+      },
       defaultOptionsRules: [
         {
-          device: () => isMobileLayout,
+          device: (): boolean => isMobileLayout,
           options: {
             fullScreen: true,
             showCloseButton: false,
@@ -67,24 +71,28 @@ export default class SchedulerCalendar extends Widget<dxSchedulerOptions> {
           },
         },
       ],
-    });
+    };
+
+    if (isMobileLayout) {
+      this._overlay = this._createComponent(this.$element(), Popup, overlayConfig);
+    } else {
+      this._overlay = this._createComponent(this.$element(), Popover, overlayConfig);
+    }
   }
 
-  _createOverlayContent() {
+  _createOverlayContent(): dxElementWrapper {
     const result = $('<div>').addClass(CALENDAR_CLASS);
-    // @ts-expect-error
     this._calendar = this._createComponent(result, Calendar, this._getCalendarOptions());
 
-    if (this._isMobileLayout()) {
+    if (SchedulerCalendar._isMobileLayout()) {
       const scrollable = this._createScrollable(result);
       return scrollable.$element();
     }
 
     return result;
   }
 
-  _createScrollable(content) {
-    // @ts-expect-error
+  _createScrollable(content: dxElementWrapper): Scrollable {
     const result = this._createComponent('<div>', Scrollable, {
       height: 'auto',
       direction: 'both',
@@ -94,7 +102,9 @@ export default class SchedulerCalendar extends Widget<dxSchedulerOptions> {
     return result;
   }
 
-  _optionChanged({ name, value }) {
+  _optionChanged(
+    { name, value } : { name: string; value: DateLike | DateLike[] },
+  ): void {
     switch (name) {
       case 'value':
         this._calendar?.option('value', value);
@@ -104,23 +114,26 @@ export default class SchedulerCalendar extends Widget<dxSchedulerOptions> {
     }
   }
 
-  _getCalendarOptions() {
+  _getCalendarOptions(): CalendarProperties {
+    const {
+      value, min, max, firstDayOfWeek, focusStateEnabled, tabIndex, onValueChanged,
+    } = this.option();
     return {
-      value: this.option('value'),
-      min: this.option('min'),
-      max: this.option('max'),
-      firstDayOfWeek: this.option('firstDayOfWeek'),
-      focusStateEnabled: this.option('focusStateEnabled'),
-      onValueChanged: this.option('onValueChanged'),
+      value,
+      min,
+      max,
+      firstDayOfWeek,
+      focusStateEnabled,
+      tabIndex,
+      onValueChanged,
+      // @ts-expect-error skipFocusCheck is an internal Calendar property
       skipFocusCheck: true,
-      tabIndex: this.option('tabIndex'),
     };
   }
 
-  _isMobileLayout() {
+  static _isMobileLayout(): boolean {
     return !devices.current().generic;
   }
 }
 
-// @ts-expect-error
 registerComponent('dxSchedulerCalendarPopup', SchedulerCalendar);

packages/devextreme/js/__internal/scheduler/header/m_date_navigator.test.ts

@@ -1,14 +1,16 @@
 import {
   describe, expect, it, jest,
 } from '@jest/globals';
+import type { ToolbarItem } from '@js/ui/scheduler';
 
 import {
   CLASS, DEFAULT_ITEMS, getDateNavigator, ITEMS_NAME,
 } from './m_date_navigator';
+import type { SchedulerHeader } from './m_header';
 
 describe('getDateNavigator', () => {
   it('should return default options in case of item is empty', () => {
-    expect(getDateNavigator({} as any, {})).toEqual({
+    expect(getDateNavigator({} as SchedulerHeader, {})).toEqual({
       location: 'before',
       name: 'dateNavigator',
       widget: 'dxButtonGroup',
@@ -26,13 +28,13 @@ describe('getDateNavigator', () => {
     });
   });
   it('should return replace items in correct order with custom options', () => {
-    expect(getDateNavigator({} as any, {
+    expect(getDateNavigator({} as SchedulerHeader, {
       customField: 'customField',
       options: {
         customOption: 'customOption',
         items: ['dateInterval', 'next', { key: 'customButton' }],
       },
-    } as any)).toEqual({
+    } as ToolbarItem)).toEqual({
       location: 'before',
       name: 'dateNavigator',
       widget: 'dxButtonGroup',
@@ -54,7 +56,7 @@ describe('getDateNavigator', () => {
   it('should handle default and custom click callback', () => {
     const customClick = jest.fn();
     const event = { itemData: { clickHandler: jest.fn() } };
-    const config = getDateNavigator({} as any, {
+    const config = getDateNavigator({} as SchedulerHeader, {
       options: { onItemClick: customClick },
     });
 

packages/devextreme/js/__internal/scheduler/header/m_date_navigator.ts

@@ -2,7 +2,7 @@ import messageLocalization from '@js/common/core/localization/message';
 import dateUtils from '@js/core/utils/date';
 import type { ContentReadyEvent } from '@js/ui/button';
 import type { Item as ButtonGroupItem, ItemClickEvent, Properties as ButtonGroupOptions } from '@js/ui/button_group';
-import { isMaterialBased } from '@js/ui/themes';
+import { current, isMaterialBased } from '@js/ui/themes';
 import type { Item as ToolbarItem } from '@js/ui/toolbar';
 import { dateUtilsTs } from '@ts/core/utils/date';
 import { extend } from '@ts/core/utils/m_extend';
@@ -31,7 +31,7 @@ const { trimTime } = dateUtils;
 
 interface DateNavigatorItem extends ButtonGroupItem {
   key: string;
-  clickHandler: (event: ItemClickEvent) => void;
+  clickHandler: (event: ItemClickEvent) => Promise<void> | void;
   onContentReady: (event: ContentReadyEvent) => void;
 }
 
@@ -154,9 +154,28 @@ const getNextButtonOptions = (header: SchedulerHeader): DateNavigatorItem => {
   };
 };
 
+export const getTodayButtonOptions = (
+  header: SchedulerHeader,
+  item: ToolbarItem,
+): ToolbarItem => extend(true, {}, {
+  location: 'before',
+  locateInMenu: 'auto',
+  widget: 'dxButton',
+  cssClass: 'dx-scheduler-today',
+  options: {
+    text: messageLocalization.format('dxScheduler-navigationToday'),
+    icon: 'today',
+    stylingMode: 'outlined',
+    type: 'normal',
+    onClick() {
+      const { indicatorTime } = header.option();
+      header._updateCurrentDate(indicatorTime ?? new Date());
+    },
+  },
+}, item) as ToolbarItem;
+
 export const getDateNavigator = (header: SchedulerHeader, item: ToolbarItem): ToolbarItem => {
-  // @ts-expect-error current theme used
-  const stylingMode = isMaterialBased() ? 'text' : 'contained';
+  const stylingMode = isMaterialBased(current()) ? 'text' : 'contained';
   const config: ToolbarItem = extend(true, {}, {
     location: 'before',
     name: 'dateNavigator',
@@ -170,7 +189,8 @@ export const getDateNavigator = (header: SchedulerHeader, item: ToolbarItem): To
   const options = config.options as ButtonGroupOptions;
   const { onItemClick } = options;
 
-  options.items = (options.items ?? DEFAULT_ITEMS).map((groupItem) => {
+  const items = (options.items ?? DEFAULT_ITEMS);
+  options.items = items.map((groupItem: ButtonGroupItem | string) => {
     switch (groupItem) {
       case ITEMS_NAME.previousButton:
         return getPreviousButtonOptions(header);
@@ -179,7 +199,7 @@ export const getDateNavigator = (header: SchedulerHeader, item: ToolbarItem): To
       case ITEMS_NAME.calendarButton:
         return getCalendarButtonOptions(header);
       default:
-        return groupItem;
+        return groupItem as ButtonGroupItem;
     }
   });
   options.onItemClick = (event): void => {