Record and reuse terms on data load

src/app/overview/overview.component.spec.ts

@@ -10,12 +10,7 @@ import { HttpClientTestingModule } from '@angular/common/http/testing';
 import { ActivatedRoute, Params } from '@angular/router';
 import { RouterTestingModule } from '@angular/router/testing';
 import { BehaviorSubject } from 'rxjs';
-import {
-  FormBuilder,
-  FormControl,
-  FormGroup,
-  ReactiveFormsModule
-} from '@angular/forms';
+import { FormBuilder, FormControl, ReactiveFormsModule } from '@angular/forms';
 import { IsScrollableDirective } from '../_directives/is-scrollable';
 import { today } from '../_helpers';
 import {
@@ -27,11 +22,10 @@ import {
   MockGridComponent
 } from '../_mocked';
 import {
-  BreakdownResults,
   BreakdownResult,
+  BreakdownResults,
   DimensionName,
   NameLabel,
-  NameValuePercent,
   RequestFilter,
   RequestFilterRange
 } from '../_models';
@@ -209,15 +203,6 @@ describe('OverviewComponent', () => {
         ]
       };
 
-      spyOn(component, 'storeSeries').and.callFake(
-        (
-          _: boolean,
-          __: boolean,
-          ___: Array<NameValuePercent>,
-          ____: number
-        ) => {}
-      );
-
       component.extractSeriesServerData(br);
       expect(component.storeSeries).toHaveBeenCalled();
 

src/app/overview/overview.component.ts

@@ -91,6 +91,11 @@ export class OverviewComponent extends DataPollingComponent implements OnInit {
   ];
 
   filterStates: { [key: string]: FilterState } = {};
+  userFilterSearchTerms = facetNames.reduce((map, item: string) => {
+    map[item] = '';
+    return map;
+  }, {});
+
   contentTiersOptions = Array(5)
     .fill(0)
     .map((x, index) => `${x + index}`);
@@ -453,7 +458,12 @@ export class OverviewComponent extends DataPollingComponent implements OnInit {
                 return -1;
               });
             this.filterData[facetName] = safeOps;
-            this.filterDisplayData({ term: '', dimension: facetName });
+
+            const previousTerm = this.userFilterSearchTerms[facetName];
+            this.filterDisplayData({
+              term: previousTerm ? previousTerm : '',
+              dimension: facetName
+            });
           }
         });
 
@@ -788,14 +798,16 @@ export class OverviewComponent extends DataPollingComponent implements OnInit {
 
   /** filterDisplayData
   /* @param {FilterInfo} filterInfo
-  /* updates this.displayedFilterData
-  /* updates the form object
+  /* updates this.displayedFilterData to a filtered and truncated subset for display
+  /* (called on initialisation and in response to a search term changing)
   */
   filterDisplayData(filterInfo: FilterInfo): void {
     if (!filterInfo.dimension) {
       filterInfo.dimension = this.form.value.facetParameter;
     }
 
+    this.userFilterSearchTerms[filterInfo.dimension] = filterInfo.term;
+
     const term = replaceDiacritics(filterInfo.term);
     const reg = new RegExp(appendDiacriticEquivalents(term), 'gi');
     const toDisplay = this.filterData[filterInfo.dimension]