Change Detection: On Push aka UI Smoothness (#1369)

* Updated Series Info Cards to use OnPush and hooked in progress events when we do a mark as read/unread on entities. These events update progress bars but also will now trigger a re-calculation on Read Time Left.

* Removed Library Card Component

* Refactored manga reader title and subtitle calculation to the backend.

* Coverted card actionables to onPush

* Series Card on push cleanup

* Updated edit collection tags for on push

* Update cover image chooser for on push

* Cleaned up carsouel reel

* Updated cover image to allow for uploading gif and webp files

* Bulk add to collection on push

* Updated bulk operation to use on push. Updated bulk operation to have mark as unread and read buttons explicitly. Updated so add to collection is visible and delete.

Fixed a bug where manage library component wasn't invoking the trackBy function

* Updating entity title for on push

* Removed file info component

* Updated Mange Library for on push

* Entity info cards on push

* List item on push

* Updated icon and title for on push and fixed some missing change detection on series detail

* Restricted the typeahead interface to simplify the design

* Edit Series Relation now shows a value in the dropdown for Parent relationships and disables the field.

* Updated edit series relation to focus on new typeahead when adding a new relationship

* Added some documentation and when Scanning a library, don't allow the user to enqueue the same job multiple times.

* Applied the No-enqueue if already enqueued logic to other tasks

* Library detail on push

* Updated events widget to onpush

* Card detail drawer on push. Card detail cover chooser now will show all chapter's covers for selection in cover chooser.

* Chapter metadata detail on push

* Removed Card Detail modal

* All collections on push

* Removed some comments

* Updated bulk selection to use an observable rather than function calls so new on push strategy works

* collection detail now uses on push and scroller is placed on correct element

* Updated library recommended to on push. Ensure that when mark as read occurs, the appropriate streams are refreshed.

* Updated library detail to on push

* Update metadata fiter to onpush. Bugs found and reported to Project

* person badge on push

* Read more on push

* Updated tag badge to on push

* User login on push

* When initing side nav, don't call an authenticated api until we are sure a user is logged in

* Updated splash container to on push

* Dashboard on push

* Side nav slight refactor around some api calls

* Cleaned up series card on push to use same cdRef naming convention

* Updated Static Files to use caching

* Added width and height to logo image

* shortcuts modal on push

* reading lists on push

* Reading list detail on push

* draggable ordered list on push

* Refactored reading-list-detail to use a new item which drastically reduces renders on operations

* series format on push

* circular loader on push

* Badge Expander on push

* update notification modal on push

* drawer on push

* Edit Series Modal on push

* reset password on push

* review series modal on push

* series metadata detail on push

* theme manager on push

* confirm reset password on push

* register on push

* confirm migration email on push

* confirm email on push

* add email to account migration on push

* user preferences on push. Made global settings default open

* edit series relation on push

* Fixed an edge case bug for next chapter where if the current volume had a single chapter of 1 and the next volume had a chapter number of 0, it would say there are no more chapters.

* Updated infinite scroller with on push support

* Moved some animations over to typeahead, not integrated yet.

* Manga reader is now on push

* Reader settings on push

* refactored how we close the book

* Updated table of contents for on push

* Updated book reader for on push. Fixed a bug where table of contents wasn't showing current page anchor due to a scroll calulation bug

* Small code tweak

* Icon and title on push

* nav header on push

* grouped typeahead on push

* typeahead on push and added a new trackby identity function to allow even faster rendering of big lists

* pdf reader on push

* code cleanup

UI/Web/src/app/cards/bulk-selection.service.ts

@@ -1,7 +1,8 @@
-import { Injectable } from '@angular/core';
+import { ChangeDetectorRef, Injectable } from '@angular/core';
 import { NavigationStart, Router } from '@angular/router';
+import { ReplaySubject } from 'rxjs';
 import { filter } from 'rxjs/operators';
-import { Action, ActionFactoryService } from '../_services/action-factory.service';
+import { Action, ActionFactoryService, ActionItem } from '../_services/action-factory.service';
 
 type DataSource = 'volume' | 'chapter' | 'special' | 'series' | 'bookmark';
 
@@ -23,6 +24,15 @@ export class BulkSelectionService {
   private dataSourceMax: { [key: string]: number} = {};
   public isShiftDown: boolean = false;
 
+  private actionsSource = new ReplaySubject<ActionItem<any>[]>(1);
+  public actions$ = this.actionsSource.asObservable();
+
+  private selectionsSource = new ReplaySubject<number>(1);
+  /**
+   * Number of active selections
+   */
+  public selections$ = this.selectionsSource.asObservable();
+
   constructor(private router: Router, private actionFactory: ActionFactoryService) {
     router.events
       .pipe(filter(event => event instanceof NavigationStart))
@@ -61,6 +71,7 @@ export class BulkSelectionService {
     this.prevIndex = index;
     this.prevDataSource = dataSource;
     this.dataSourceMax[dataSource] = maxIndex;
+    this.actionsSource.next(this.getActions(() => {}));
   }
 
   isCardSelected(dataSource: DataSource, index: number) {
@@ -77,6 +88,7 @@ export class BulkSelectionService {
 
     if (from === to) {
       this.selectedCards[dataSource][to] = value;
+      this.selectionsSource.next(this.totalSelections());
       return;
     }
 
@@ -89,10 +101,12 @@ export class BulkSelectionService {
     for (let i = from; i <= to; i++) {
       this.selectedCards[dataSource][i] = value;
     }
+    this.selectionsSource.next(this.totalSelections());
   }
 
   deselectAll() {
     this.selectedCards = {};
+    this.selectionsSource.next(0);
   }
 
   hasSelections() {