Open-ILS/src/eg2/src/app/staff/catalog/result/results.component.ts

   1 import {Component, OnInit, OnDestroy, Input} from '@angular/core';
   2 import {Observable, Subscription} from 'rxjs';
   3 import {map, switchMap, distinctUntilChanged} from 'rxjs/operators';
   4 import {ActivatedRoute, ParamMap} from '@angular/router';
   5 import {CatalogService} from '@eg/share/catalog/catalog.service';
   6 import {BibRecordService} from '@eg/share/catalog/bib-record.service';
   7 import {CatalogUrlService} from '@eg/share/catalog/catalog-url.service';
   8 import {CatalogSearchContext, CatalogSearchState} from '@eg/share/catalog/search-context';
   9 import {PcrudService} from '@eg/core/pcrud.service';
  10 import {StaffCatalogService} from '../catalog.service';
  11 import {IdlObject} from '@eg/core/idl.service';
  12 import {BasketService} from '@eg/share/catalog/basket.service';
  13
  14 @Component({
  15   selector: 'eg-catalog-results',
  16   templateUrl: 'results.component.html'
  17 })
  18 export class ResultsComponent implements OnInit, OnDestroy {
  19
  20     searchContext: CatalogSearchContext;
  21
  22     // Cache record creator/editor since this will likely be a
  23     // reasonably small set of data w/ lots of repitition.
  24     userCache: {[id: number]: IdlObject} = {};
  25
  26     allRecsSelected: boolean;
  27
  28     searchSub: Subscription;
  29     routeSub: Subscription;
  30     basketSub: Subscription;
  31
  32     constructor(
  33         private route: ActivatedRoute,
  34         private pcrud: PcrudService,
  35         private cat: CatalogService,
  36         private bib: BibRecordService,
  37         private catUrl: CatalogUrlService,
  38         private staffCat: StaffCatalogService,
  39         private basket: BasketService
  40     ) {}
  41
  42     ngOnInit() {
  43         this.searchContext = this.staffCat.searchContext;
  44
  45         // Our search context is initialized on page load.  Once
  46         // ResultsComponent is active, it will not be reinitialized,
  47         // even if the route parameters changes (unless we change the
  48         // route reuse policy).  Watch for changes here to pick up new
  49         // searches.
  50         //
  51         // This will also fire on page load.
  52         this.routeSub =
  53             this.route.queryParamMap.subscribe((params: ParamMap) => {
  54
  55               // TODO: Angular docs suggest using switchMap(), but
  56               // it's not firing for some reason.  Also, could avoid
  57               // firing unnecessary searches when a param unrelated to
  58               // searching is changed by .map()'ing out only the desired
  59               // params and running through .distinctUntilChanged(), but
  60               // .map() is not firing either.  I'm missing something.
  61               this.searchByUrl(params);
  62         });
  63
  64         // After each completed search, update the record selector.
  65         this.searchSub = this.cat.onSearchComplete.subscribe(
  66             ctx => this.applyRecordSelection());
  67
  68         // Watch for basket changes applied by other components.
  69         this.basketSub = this.basket.onChange.subscribe(
  70             () => this.applyRecordSelection());
  71     }
  72
  73     ngOnDestroy() {
  74         this.routeSub.unsubscribe();
  75         this.searchSub.unsubscribe();
  76         this.basketSub.unsubscribe();
  77     }
  78
  79     // Apply the select-all checkbox when all visible records
  80     // are selected.
  81     applyRecordSelection() {
  82         const ids = this.searchContext.currentResultIds();
  83         let allChecked = true;
  84         ids.forEach(id => {
  85             if (!this.basket.hasRecordId(id)) {
  86                 allChecked = false;
  87             }
  88         });
  89         this.allRecsSelected = allChecked;
  90     }
  91
  92     // Pull values from the URL and run the requested search.
  93     searchByUrl(params: ParamMap): void {
  94         this.catUrl.applyUrlParams(this.searchContext, params);
  95
  96         if (this.searchContext.isSearchable()) {
  97
  98             this.cat.search(this.searchContext)
  99             .then(ok => {
 100                 this.cat.fetchFacets(this.searchContext);
 101                 this.cat.fetchBibSummaries(this.searchContext)
 102                 .then(ok2 => this.fleshSearchResults());
 103             });
 104         }
 105     }
 106
 107     // Records file into place randomly as the server returns data.
 108     // To reduce page display shuffling, avoid showing the list of
 109     // records until the first few are ready to render.
 110     shouldStartRendering(): boolean {
 111
 112         if (this.searchHasResults()) {
 113             const pageCount = this.searchContext.currentResultIds().length;
 114             switch (pageCount) {
 115                 case 1:
 116                     return this.searchContext.result.records[0];
 117                 default:
 118                     return this.searchContext.result.records[0]
 119                         && this.searchContext.result.records[1];
 120             }
 121         }
 122
 123         return false;
 124     }
 125
 126     fleshSearchResults(): void {
 127         const records = this.searchContext.result.records;
 128         if (!records || records.length === 0) { return; }
 129
 130         // Flesh the creator / editor fields with the user object.
 131         this.bib.fleshBibUsers(records.map(r => r.record));
 132     }
 133
 134     searchIsDone(): boolean {
 135         return this.searchContext.searchState === CatalogSearchState.COMPLETE;
 136     }
 137
 138     searchIsActive(): boolean {
 139         return this.searchContext.searchState === CatalogSearchState.SEARCHING;
 140     }
 141
 142     searchHasResults(): boolean {
 143         return this.searchIsDone() && this.searchContext.result.count > 0;
 144     }
 145
 146     toggleAllRecsSelected() {
 147         const ids = this.searchContext.currentResultIds();
 148
 149         if (this.allRecsSelected) {
 150             this.basket.addRecordIds(ids);
 151         } else {
 152             this.basket.removeRecordIds(ids);
 153         }
 154     }
 155 }
 156
 157