Merged in task/dspace-cris-2025_02_x/DSC-2702 (pull request DSpace#4058)

DSC-2702 Created box that is shown instead of the pie chart in statistics categories tab if there is no data

Approved-by: Andrea Barbasso

Author: Mattia Vianelli

src/app/statistics-page/cris-statistics-page/statistics-chart/statistics-chart-pie/statistics-chart-pie.component.html

@@ -20,9 +20,17 @@
 }
 
 @if ((results | async) && (results | async).length > 0) {
-  <div #chartRef id="chart" class="d-flex w-100 search-chart-container">
-    <ds-chart [results]="results" [view]="view" [type]='chartType.PIE' [animations]="true"></ds-chart>
-  </div>
+  @let res = results | async;
+  @if (hasNonZeroValues(res)) {
+    <div #chartRef id="chart" class="d-flex w-100 search-chart-container">
+      <ds-chart [results]="results" [view]="view" [type]='chartType.PIE' [animations]="true"></ds-chart>
+    </div>
+  } @else {
+    <div class="no-data-message">
+      <i class="fas fa-chart-pie fa-4x no-data-icon"></i><br>
+      <h4 class="no-data-title">{{ 'chart.no-data.title' | translate }}</h4>
+    </div>
+  }
 } @else {
   <ds-alert [type]="'alert-info'" [content]="'search.filters.applied.charts.no.data.found'"></ds-alert>
 }

src/app/statistics-page/cris-statistics-page/statistics-chart/statistics-chart-pie/statistics-chart-pie.component.scss

@@ -5,4 +5,33 @@
 .export-buttons-container{
 	display:flex;
 	justify-content:flex-end;
-}
+}
+
+.no-data-message {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 40px 20px;
+  text-align: center;
+  color: #666;
+  border: 1px solid #ddd;
+  background: #f9f9f9;
+  border-radius: 8px;
+  height: 400px;
+}
+
+.no-data-icon {
+  color: #ccc;
+  margin-bottom: 15px;
+}
+
+.no-data-title {
+  margin: 10px 0;
+  color: #555;
+}
+
+.no-data-description {
+  margin: 10px 0;
+  color: #777;
+}

src/app/statistics-page/cris-statistics-page/statistics-chart/statistics-chart-pie/statistics-chart-pie.component.ts

@@ -74,4 +74,14 @@ export class StatisticsChartPieComponent extends StatisticsChartDataComponent {
     ));
   }
 
+  /**
+   * Check if the data has any non-zero values
+   */
+  public hasNonZeroValues(data: any[]): boolean {
+    if (!data || data.length === 0) {
+      return false;
+    }
+    return data.some(item => item && item.value && item.value > 0);
+  }
+
 }

src/assets/i18n/en.json5

@@ -1409,6 +1409,8 @@
 
   "chart.load-more": "Load more results",
 
+  "chart.no-data.title": "No Data Available",
+
   "claimed-approved-search-result-list-element.title": "Approved",
 
   "claimed-declined-search-result-list-element.title": "Rejected, sent back to submitter",

src/assets/i18n/it.json5

@@ -2270,6 +2270,9 @@
   // "chart.load-more": "Load more results",
   "chart.load-more": "Carica più risultati",
 
+  //"chart.no-data.title": "No Data Available",
+  "chart.no-data.title": "Data Non Disponibile",
+
   // "claimed-approved-search-result-list-element.title": "Approved",
   "claimed-approved-search-result-list-element.title": "Approvato",