66 lines
2.2 KiB
TypeScript
66 lines
2.2 KiB
TypeScript
/** Angular Imports */
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import { CollectionViewer, DataSource } from '@angular/cdk/collections';
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/** rxjs Imports */
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import { Observable, BehaviorSubject } from 'rxjs';
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/** Custom Services */
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import { SystemService } from '../system.service';
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/**
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* Audit Trails custom data source to implement server side filtering, pagination and sorting.
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*/
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export class AuditTrailsDataSource implements DataSource<any> {
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/** Audit Trails behavior subject to represent loaded audit trails page. */
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private auditTrailsSubject = new BehaviorSubject<any[]>([]);
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/** Records subject to represent total number of filtered audit trail records. */
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private recordsSubject = new BehaviorSubject<number>(0);
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/** Records observable which can be subscribed to get the value of total number of filtered audit trail records. */
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public records$ = this.recordsSubject.asObservable();
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/**
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* @param {SystemService} systemService System Service.
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*/
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constructor(private systemService: SystemService) {}
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/**
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* Gets audit trails on the basis of provided parameters and emits the value.
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* @param {any} filterBy Properties by which entries should be filtered.
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* @param {string} orderBy Property by which entries should be sorted.
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* @param {string} sortOrder Sort order: ascending or descending.
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* @param {number} pageIndex Page number.
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* @param {number} limit Number of entries within the page.
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*/
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getAuditTrails(
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filterBy: any,
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orderBy: string = '',
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sortOrder: string = '',
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pageIndex: number = 0,
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limit: number = 10
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) {
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this.auditTrailsSubject.next([]);
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this.systemService
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.getAuditTrails(filterBy, orderBy, sortOrder, pageIndex * limit, limit)
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.subscribe((auditTrails: any) => {
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this.recordsSubject.next(auditTrails.totalFilteredRecords);
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this.auditTrailsSubject.next(auditTrails.pageItems);
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});
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}
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/**
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* @param {CollectionViewer} collectionViewer
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*/
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connect(collectionViewer: CollectionViewer): Observable<any[]> {
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return this.auditTrailsSubject.asObservable();
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}
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/**
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* @param {CollectionViewer} collectionViewer
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*/
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disconnect(collectionViewer: CollectionViewer): void {
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this.auditTrailsSubject.complete();
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this.recordsSubject.complete();
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}
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}
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