[CST-4499] Version history (WIP) - Minor fixes and code cleanup

src/app/shared/item/item-versions/notice/item-versions-notice.component.ts

@@ -1,19 +1,16 @@
 import { Component, Input, OnInit } from '@angular/core';
 import { Item } from '../../../../core/shared/item.model';
-import { PaginationComponentOptions } from '../../../pagination/pagination-component-options.model';
-import { PaginatedSearchOptions } from '../../../search/paginated-search-options.model';
 import { Observable } from 'rxjs';
 import { RemoteData } from '../../../../core/data/remote-data';
 import { VersionHistory } from '../../../../core/shared/version-history.model';
 import { Version } from '../../../../core/shared/version.model';
 import { hasValue, hasValueOperator } from '../../../empty.util';
 import {
-  getAllSucceededRemoteData, getFirstSucceededRemoteData,
+  getAllSucceededRemoteData,
   getFirstSucceededRemoteDataPayload,
   getRemoteDataPayload
 } from '../../../../core/shared/operators';
-import { filter, map, switchMap, take } from 'rxjs/operators';
+import { startWith, switchMap } from 'rxjs/operators';
-import { followLink } from '../../../utils/follow-link-config.model';
 import { VersionHistoryDataService } from '../../../../core/data/version-history-data.service';
 import { AlertType } from '../../../alert/aletr-type';
 import { getItemPageRoute } from '../../../../item-page/item-page-routing-paths';
@@ -56,11 +53,6 @@ export class ItemVersionsNoticeComponent implements OnInit {
   /**
    * Pagination options to fetch a single version on the first page (this is the latest version in the history)
    */
-  // latestVersionOptions = Object.assign(new PaginationComponentOptions(),{
-  //   id: 'item-newest-version-options',
-  //   currentPage: 1,
-  //   pageSize: 1
-  // });
 
   /**
    * The AlertType enumeration
@@ -75,7 +67,6 @@ export class ItemVersionsNoticeComponent implements OnInit {
    * Initialize the component's observables
    */
   ngOnInit(): void {
-    // const latestVersionSearch = new PaginatedSearchOptions({pagination: this.latestVersionOptions});
     if (hasValue(this.item.version)) {
       this.versionRD$ = this.item.version;
       this.versionHistoryRD$ = this.versionRD$.pipe(
@@ -85,36 +76,15 @@ export class ItemVersionsNoticeComponent implements OnInit {
         switchMap((version: Version) => version.versionhistory)
       );
 
-      /*const versionHistory$ = this.versionHistoryRD$.pipe(
-        getAllSucceededRemoteData(),
-        getRemoteDataPayload(),
-      );
-
-      this.latestVersion$ = versionHistory$.pipe(
-        switchMap((versionHistory: VersionHistory) =>
-          this.versionHistoryService.getVersions(versionHistory.id, latestVersionSearch, true, true, followLink('item'))),
-        getAllSucceededRemoteData(),
-        getRemoteDataPayload(),
-        hasValueOperator(),
-        filter((versions) => versions.page.length > 0),
-        map((versions) => versions.page[0])
-      );*/
-
       this.latestVersion$ = this.versionHistoryRD$.pipe(
         getFirstSucceededRemoteDataPayload(),
         switchMap((vh) => this.versionHistoryService.getLatestVersionFromHistory$(vh))
       );
 
-      /*this.isLatestVersion$ = observableCombineLatest(
-        this.versionRD$.pipe(getAllSucceededRemoteData(), getRemoteDataPayload()), this.latestVersion$
-      ).pipe(
-        map(([itemVersion, latestVersion]: [Version, Version]) => itemVersion.id === latestVersion.id),
-        startWith(true)
-      );*/
-
       this.isLatestVersion$ = this.versionRD$.pipe(
         getFirstSucceededRemoteDataPayload(),
-        switchMap((version) => this.versionHistoryService.isLatest$(version))
+        switchMap((version) => this.versionHistoryService.isLatest$(version)),
+        startWith(true),
       );
     }
   }
@@ -129,5 +99,3 @@ export class ItemVersionsNoticeComponent implements OnInit {
     }
   }
 }
-
-// TODO code cleanup