@c8y/ngx-components
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Angular modules for Cumulocity IoT applications
110 lines • 17.8 kB
JavaScript
import { filter, tap } from 'rxjs';
/**
* Abstract class representing an interval reload functionality.
* This class provides methods and properties for managing an interval-based reload mechanism.
*/
export class IntervalBasedReload {
/**
* Stops the countdown and triggers a refresh action.
* This function is responsible for halting the countdown interval component's operation.
* After stopping the countdown, it emits an `onCountdownEnded` event.
* This event is used to inform external components that the countdown has ended,
* typically prompting them to reload or refresh their data.
*/
autoRefreshList() {
if (this.isIntervalRefreshToggleOn && this.isAutoRefreshEnabled) {
this.countdownIntervalComponent.stop();
}
this.onCountdownEnded.emit();
}
/**
* Manages the countdown timer's visibility and state in response to user scrolling.
*
* This method toggles the countdown timer based on the user's scrolling behavior. It uses
* the `disableCountdown` and `enableCountdown` methods for handling the countdown state.
*
* - If the user is scrolling down while the countdown is visible (`isScrolling` is true and
* `hideCountdown` is false), `disableCountdown` is called to stop and hide the countdown,
* and `isIntervalRefreshToggleOn` is set to false.
*
* - If the user has stopped scrolling, the countdown subscription is closed, and the countdown
* is hidden (`!isScrolling`, `countdownSubscription?.closed`, `hideCountdown`), `enableCountdown`
* is called to show and restart the countdown, and `isIntervalRefreshToggleOn` is set to true.
*/
handleScrolling() {
// Checks if the user has scrolled down while the countdown is visible
const onUserScrollDownHide = this.isScrolling && !this.hideCountdown;
if (onUserScrollDownHide) {
this.disableCountdown();
this.isIntervalRefreshToggleOn = false;
return;
}
// Checks if the user has stopped scrolling and the countdown is currently hidden
const onUserScrollTopShow = !this.isScrolling && this.countdownSubscription?.closed && this.hideCountdown;
if (onUserScrollTopShow) {
this.isIntervalRefreshToggleOn = true;
this.enableCountdown();
}
}
/**
* Handles the toggle state of the countdown on button click.
*
* This method is triggered by a mouse event, typically a click on the countdown toggle button.
* It toggles `isIntervalRefreshToggleOn` to reflect the current state of the countdown timer.
*
* - If `isIntervalRefreshToggleOn` is set to false, indicating that the countdown should be stopped,
* `disableCountdown` is called, and `manuallyDisabledCountdown` is set to true.
*
* - If `isIntervalRefreshToggleOn` is true and the countdown subscription is closed, indicating that
* the countdown can be started, `enableCountdown` is called, and `manuallyDisabledCountdown`
* is set to false.
*
* @param $event - The MouseEvent that triggered this method.
*/
onToggleCountdownButtonState($event) {
$event.preventDefault();
this.isIntervalRefreshToggleOn = !this.isRefreshDisabled && !this.isIntervalRefreshToggleOn;
this.updateCountdownButtonTooltipText();
if (!this.isIntervalRefreshToggleOn) {
this.disableCountdown();
this.manuallyDisabledCountdown = true;
return;
}
const onRefreshToggleOn = this.isIntervalRefreshToggleOn && this.countdownSubscription.closed;
if (onRefreshToggleOn) {
this.enableCountdown();
this.manuallyDisabledCountdown = false;
}
}
/**
* This function listens for changes in the `isLoading` observable, filtering out any truthy values.
* Once a falsy value is detected (indicating that loading has finished), it attempts to start the countdown.
*
* IMPORTANT: If the widget's configuration (refreshInterval, check template) is not set prior to executing countdownIntervalComponent?.start,
* the countdown interval will not start!
*
* @param injector - The injector used to provide necessary dependencies
* within the `runInInjectionContext`.
*/
startCountdown() {
this.countdownSubscription = this.isLoading
.pipe(filter(isLoading => !Boolean(isLoading)), tap(() => {
this.countdownIntervalComponent?.start();
}))
.subscribe();
}
/**
* Disables and hides the countdown timer.
*
* This method stops the ongoing countdown process by
* stopping the `countdownIntervalComponent` if it exists. It then hides the countdown timer
* by setting `hideCountdown` to true. This method encapsulates the logic required to halt and
* conceal the countdown timer.
*/
disableCountdown() {
this.countdownSubscription.unsubscribe();
this.countdownIntervalComponent?.stop();
this.hideCountdown = true;
}
}
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Based on it next countdown cycle is being started.\n   */\n  abstract isLoading: BehaviorSubject<boolean>;\n  /**\n   * Indicates whether the alarm list is being scrolled or not.\n   */\n  abstract isScrolling: boolean;\n  /**\n   * Current refresh interval set in a widget config.\n   */\n  abstract refreshInterval: number;\n  /**\n   * Indicates that a countdown cycle has ended.\n   */\n  abstract onCountdownEnded: EventEmitter<void>;\n  /**\n   * Indicates the current state of an interval refresh toggle button.\n   */\n  abstract isIntervalRefreshToggleOn: boolean;\n\n  abstract toggleCountdownButtonTooltipText: string;\n  /**\n   * Indicates whether the countdown has been manually disabled by the user.\n   */\n  protected abstract manuallyDisabledCountdown: boolean;\n  /**\n   * Controls the visibility of the countdown timer component in the current component's UI.\n   */\n  protected abstract hideCountdown: boolean;\n\n  /**\n   * Stops the countdown and triggers a refresh action.\n   * This function is responsible for halting the countdown interval component's operation.\n   * After stopping the countdown, it emits an `onCountdownEnded` event.\n   * This event is used to inform external components that the countdown has ended,\n   * typically prompting them to reload or refresh their data.\n   */\n  autoRefreshList(): void {\n    if (this.isIntervalRefreshToggleOn && this.isAutoRefreshEnabled) {\n      this.countdownIntervalComponent.stop();\n    }\n    this.onCountdownEnded.emit();\n  }\n\n  /**\n   * Manages the countdown timer's visibility and state in response to user scrolling.\n   *\n   * This method toggles the countdown timer based on the user's scrolling behavior. It uses\n   * the `disableCountdown` and `enableCountdown` methods for handling the countdown state.\n   *\n   * - If the user is scrolling down while the countdown is visible (`isScrolling` is true and\n   *   `hideCountdown` is false), `disableCountdown` is called to stop and hide the countdown,\n   *   and `isIntervalRefreshToggleOn` is set to false.\n   *\n   * - If the user has stopped scrolling, the countdown subscription is closed, and the countdown\n   *   is hidden (`!isScrolling`, `countdownSubscription?.closed`, `hideCountdown`), `enableCountdown`\n   *   is called to show and restart the countdown, and `isIntervalRefreshToggleOn` is set to true.\n   */\n  handleScrolling(): void {\n    // Checks if the user has scrolled down while the countdown is visible\n    const onUserScrollDownHide = this.isScrolling && !this.hideCountdown;\n\n    if (onUserScrollDownHide) {\n      this.disableCountdown();\n      this.isIntervalRefreshToggleOn = false;\n      return;\n    }\n\n    // Checks if the user has stopped scrolling and the countdown is currently hidden\n    const onUserScrollTopShow =\n      !this.isScrolling && this.countdownSubscription?.closed && this.hideCountdown;\n\n    if (onUserScrollTopShow) {\n      this.isIntervalRefreshToggleOn = true;\n      this.enableCountdown();\n    }\n  }\n\n  abstract reload(): void;\n  /**\n   * Wrapper method where it's name better describes a context where it was called.\n   */\n  abstract countdownEnded(): void;\n\n  /**\n   * Handles the toggle state of the countdown on button click.\n   *\n   * This method is triggered by a mouse event, typically a click on the countdown toggle button.\n   * It toggles `isIntervalRefreshToggleOn` to reflect the current state of the countdown timer.\n   *\n   * - If `isIntervalRefreshToggleOn` is set to false, indicating that the countdown should be stopped,\n   *   `disableCountdown` is called, and `manuallyDisabledCountdown` is set to true.\n   *\n   * - If `isIntervalRefreshToggleOn` is true and the countdown subscription is closed, indicating that\n   *   the countdown can be started, `enableCountdown` is called, and `manuallyDisabledCountdown`\n   *   is set to false.\n   *\n   * @param $event - The MouseEvent that triggered this method.\n   */\n  onToggleCountdownButtonState($event: MouseEvent): void {\n    $event.preventDefault();\n    this.isIntervalRefreshToggleOn = !this.isRefreshDisabled && !this.isIntervalRefreshToggleOn;\n    this.updateCountdownButtonTooltipText();\n\n    if (!this.isIntervalRefreshToggleOn) {\n      this.disableCountdown();\n      this.manuallyDisabledCountdown = true;\n      return;\n    }\n\n    const onRefreshToggleOn = this.isIntervalRefreshToggleOn && this.countdownSubscription.closed;\n\n    if (onRefreshToggleOn) {\n      this.enableCountdown();\n      this.manuallyDisabledCountdown = false;\n    }\n  }\n\n  /**\n   * This function listens for changes in the `isLoading` observable, filtering out any truthy values.\n   * Once a falsy value is detected (indicating that loading has finished), it attempts to start the countdown.\n   *\n   * IMPORTANT: If the widget's configuration (refreshInterval, check template) is not set prior to executing countdownIntervalComponent?.start,\n   * the countdown interval will not start!\n   *\n   * @param injector - The injector used to provide necessary dependencies\n   *                   within the `runInInjectionContext`.\n   */\n  startCountdown(): void {\n    this.countdownSubscription = this.isLoading\n      .pipe(\n        filter(isLoading => !Boolean(isLoading)),\n        tap(() => {\n          this.countdownIntervalComponent?.start();\n        })\n      )\n      .subscribe();\n  }\n\n  /**\n   * Enables and starts the countdown timer.\n   *\n   * This method makes the countdown visible (`hideCountdown` is set to false) and then\n   * starts the countdown process. It ensures the countdown timer is updated immediately\n   * by triggering change detection with `cdRef.detectChanges()` before starting the countdown.\n   * This method encapsulates the logic required to initiate the countdown timer.\n   */\n  abstract enableCountdown(): void;\n\n  /**\n   * Disables and hides the countdown timer.\n   *\n   * This method stops the ongoing countdown process by\n   * stopping the `countdownIntervalComponent` if it exists. It then hides the countdown timer\n   * by setting `hideCountdown` to true. This method encapsulates the logic required to halt and\n   * conceal the countdown timer.\n   */\n  disableCountdown(): void {\n    this.countdownSubscription.unsubscribe();\n    this.countdownIntervalComponent?.stop();\n    this.hideCountdown = true;\n  }\n\n  /**\n   * Updates the countdown button tooltip text based on the state of the interval refresh toggle state.\n   */\n  protected abstract updateCountdownButtonTooltipText(): void;\n}\n"]}