feat: introduce new dropdown selector

apps/datahub/src/app/app.module.ts

@@ -63,6 +63,7 @@ import { MelDataViewComponent } from './dataset/dataset-visualisation/data-view/
 import { environment } from '../environments/environnment'
 import { MelModule, MelEmbeddedTranslateLoader } from '@mel-dataplatform/mel'
 import { MelFieldsService } from './search/service/fields.service'
+import { MelDatahubDropdownRangeComponent } from './search/search-filters/mel-datahub-dropdown-range/mel-datahub-dropdown-range.component'
 
 @NgModule({
   declarations: [
@@ -86,6 +87,8 @@ import { MelFieldsService } from './search/service/fields.service'
     DatasetVisualisationComponent,
     MelMapViewComponent,
     MelDataViewComponent,
+    MelDatahubDropdownRangeComponent,
+    MelDatahubDropdownRangeComponent,
   ],
   imports: [
     MelModule,

apps/datahub/src/app/search/search-filters/dropdown-multiselect/dropdown-multiselect.component.html

@@ -1,16 +1,16 @@
 <button
-  class="mel-primary-button rounded-none"
+  class="mel-primary-button gap-0 rounded-none w-52"
   [attr.aria-owns]="id"
   (click)="openOverlay()"
   (keydown)="handleTriggerKeydown($event)"
   cdkOverlayOrigin
   #overlayOrigin="cdkOverlayOrigin"
 >
-  {{ title }}
+  <span>{{ title }}</span>
   <div class="grow flex items-center mr-2 gap-2 overflow-hidden">
     @if(hasSelectedChoices){
     <div
-      class="shrink-0 rounded-full text-primary bg-white font-bold text-[12px] w-5 h-5 flex items-center justify-center mr-1 selected-count"
+      class="shrink-0 rounded-full text-primary bg-white font-bold text-[12px] w-5 h-5 flex items-center justify-center mr-1 selected-count ml-2"
     >
       {{ selected['length'] }}
     </div>

apps/datahub/src/app/search/search-filters/filter-dropdown/filter-dropdown.component.html

@@ -1,11 +1,19 @@
+@if (fieldName === 'qualityScore'){
+<mel-datahub-dropdown-range
+  class="w-full"
+  [title]="title"
+  [choices]="choices$ | async"
+  (selectValues)="onSelectedValues($event)"
+  [attr.data-cy-field]="fieldName"
+></mel-datahub-dropdown-range>
+} @else {
 <mel-datahub-dropdown-multiselect
   class="w-full"
   [title]="title"
-  [maxRows]="6"
   [choices]="choices$ | async"
   [selected]="selected$ | async"
-  [allowSearch]="true"
   (selectValues)="onSelectedValues($event)"
   [attr.data-cy-field]="fieldName"
 >
 </mel-datahub-dropdown-multiselect>
+}

apps/datahub/src/app/search/search-filters/mel-datahub-dropdown-range/mel-datahub-dropdown-range.component.html

@@ -0,0 +1,92 @@
+<button
+  class="mel-primary-button gap-0 rounded-none w-52"
+  [attr.aria-owns]="id"
+  (click)="openOverlay()"
+  cdkOverlayOrigin
+  #overlayOrigin="cdkOverlayOrigin"
+>
+  <span>{{ title }}</span>
+  <div class="grow flex items-center mr-2 gap-2 overflow-hidden">
+    @if(hasSelectedChoices){
+    <div
+      class="shrink-0 rounded-full text-primary bg-white font-bold text-[12px] w-5 h-5 flex items-center justify-center mr-1 selected-count ml-2"
+    >
+      {{ selected['length'] }}
+    </div>
+    }
+  </div>
+  <button class="h-6 w-6" data-cy="clearSelection">
+    @if(hasSelectedChoices && !overlayOpen){
+    <mat-icon
+      class="material-symbols-outlined shrink-0 opacity-40 mr-1.5 hover:opacity-80 transition-colors clear-btn"
+      (click)="clearSelection($event)"
+    >
+      close
+    </mat-icon>
+    }
+  </button>
+  <mat-icon class="material-symbols-outlined shrink-0">
+    @if(overlayOpen){
+    <ng-container>expand_less</ng-container>
+    } @else {
+    <ng-container>expand_more</ng-container>
+    }
+  </mat-icon>
+</button>
+
+<ng-template
+  cdkConnectedOverlay
+  cdkConnectedOverlayHasBackdrop
+  cdkConnectedOverlayBackdropClass="cdk-overlay-transparent-backdrop"
+  [cdkConnectedOverlayOrigin]="overlayOrigin"
+  [cdkConnectedOverlayOpen]="overlayOpen"
+  [cdkConnectedOverlayPositions]="overlayPositions"
+  [cdkConnectedOverlayScrollStrategy]="scrollStrategy"
+  [cdkConnectedOverlayFlexibleDimensions]="true"
+  (overlayOutsideClick)="closeOverlay()"
+  (detach)="closeOverlay()"
+>
+  <div
+    class="bg-white border border-gray-300 shadow-lg py-2 w-full overflow-x-hidden overflow-y-auto overlay-container"
+    [style.max-height]="overlayMaxHeight"
+    [style.width]="'300px'"
+    role="listbox"
+    tabindex="-1"
+    [attr.id]="id"
+    [attr.aria-multiselectable]="true"
+    [attr.aria-label]="title"
+    #overlayContainer
+  >
+    <div class="flex flex-col ml-3 gap-3">
+      <div class="mr-3">
+        <div class="text-primary" translate>
+          mel.datahub.search.filters.range.from
+        </div>
+        <gn-ui-text-input
+          class="w-64"
+          (valueChange)="lowValue = $event"
+          [value]="lowValue"
+          [hint]="'mel.datahub.search.filters.minValue' | translate"
+        ></gn-ui-text-input>
+      </div>
+      <div class="mr-3">
+        <div class="text-primary" translate>
+          mel.datahub.search.filters.range.to
+        </div>
+        <gn-ui-text-input
+          class="w-64"
+          (valueChange)="highValue = $event"
+          [value]="highValue"
+          [hint]="'mel.datahub.search.filters.maxValue' | translate"
+        ></gn-ui-text-input>
+      </div>
+      <mel-datahub-button
+        [disabled]="!lowValue || !highValue"
+        class="self-end mr-3"
+        [label]="'mel.datahub.search.filters.validate' | translate"
+        [icon]="'arrow'"
+        (click)="onValidate()"
+      ></mel-datahub-button>
+    </div>
+  </div>
+</ng-template>

apps/datahub/src/app/search/search-filters/mel-datahub-dropdown-range/mel-datahub-dropdown-range.component.ts

@@ -0,0 +1,98 @@
+import {
+  CdkOverlayOrigin,
+  ConnectedPosition,
+  ScrollStrategyOptions,
+} from '@angular/cdk/overlay'
+import {
+  ChangeDetectionStrategy,
+  Component,
+  ElementRef,
+  EventEmitter,
+  Input,
+  Output,
+  ViewChild,
+} from '@angular/core'
+import { Choice, propagateToDocumentOnly } from 'geonetwork-ui'
+
+@Component({
+  selector: 'mel-datahub-dropdown-range',
+  templateUrl: './mel-datahub-dropdown-range.component.html',
+  styles: ``,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class MelDatahubDropdownRangeComponent {
+  lowValue = ''
+  highValue = ''
+  @Input() choices: Choice[]
+  @Input() title: string
+  @Input() selected: unknown[] = []
+  @Output() selectValues = new EventEmitter<unknown[]>()
+  @ViewChild('overlayOrigin') overlayOrigin: CdkOverlayOrigin
+  @ViewChild('overlayContainer', { read: ElementRef })
+  overlayContainer: ElementRef
+  overlayPositions: ConnectedPosition[] = [
+    {
+      originX: 'start',
+      originY: 'bottom',
+      overlayX: 'start',
+      overlayY: 'top',
+      offsetY: 8,
+    },
+    {
+      originX: 'start',
+      originY: 'top',
+      overlayX: 'start',
+      overlayY: 'bottom',
+      offsetY: -8,
+    },
+  ]
+  scrollStrategy = this.scrollStrategies.reposition()
+  overlayOpen = false
+  overlayWidth = 'auto'
+  overlayMaxHeight = 'none'
+  id = `dropdown-multiselect-${Math.floor(Math.random() * 10000)}`
+
+  get hasSelectedChoices() {
+    return this.selected.length > 0
+  }
+
+  constructor(private scrollStrategies: ScrollStrategyOptions) {}
+
+  openOverlay() {
+    this.overlayWidth =
+      this.overlayOrigin.elementRef.nativeElement.getBoundingClientRect()
+        .width + 'px'
+    this.overlayOpen = true
+  }
+
+  closeOverlay() {
+    this.overlayOpen = false
+  }
+
+  clearSelection(event: Event) {
+    this.selectValues.emit([])
+    this.highValue = ''
+    this.lowValue = ''
+    this.selected = []
+    propagateToDocumentOnly(event)
+  }
+
+  onValidate() {
+    const lowValue = Number(this.lowValue)
+    const highValue = Number(this.highValue)
+    this.selected = this.choices
+      .filter((choice) => {
+        const choiceNb = Number(choice.value)
+        if (lowValue && highValue) {
+          return choiceNb >= lowValue && choiceNb <= highValue
+        } else if (lowValue) {
+          return choiceNb >= lowValue
+        } else if (highValue) {
+          return choiceNb <= highValue
+        }
+        return true
+      })
+      .map((choice) => choice.value)
+    this.selectValues.emit(this.selected)
+  }
+}