DURACOM-416 Created fallback logic when user reaches an out of bound page number

src/app/core/pagination/pagination.service.ts

@@ -214,6 +214,25 @@ export class PaginationService {
     return `${paginationId}.page`;
   }
 
+  /**
+   * Centralized fallback logic for pagination. Returns the correct page to use and updates the route if needed.
+   * @param paginationId - The pagination id
+   * @param currentPage - The current page number
+   * @param totalPages - The total number of pages
+   * @returns {number} - The corrected page number to use for the next data fetch
+   */
+  public handlePaginationFallback(paginationId: string, currentPage: number, totalPages: number): number {
+    if (totalPages === 0 && currentPage !== 1) {
+      this.resetPage(paginationId);
+      return 1;
+    } else if (totalPages > 0 && currentPage > totalPages) {
+      this.updateRoute(paginationId, { page: totalPages });
+      return totalPages;
+    }
+    return currentPage;
+  }
+
+
   private getCurrentRouting(paginationId: string) {
     return this.getFindListOptions(paginationId, {}, true).pipe(
       take(1),

src/app/shared/pagination/pagination.component.ts

@@ -266,6 +266,7 @@ export class PaginationComponent implements OnChanges, OnDestroy, OnInit {
       }));
     this.checkConfig(this.paginationOptions);
     this.initializeConfig();
+    this.checkAndHandleFallbackPage();
   }
 
   ngOnChanges(changes: SimpleChanges): void {
@@ -327,6 +328,7 @@ export class PaginationComponent implements OnChanges, OnDestroy, OnInit {
   public doPageChange(page: number) {
     this.updateParams({ page: page });
     this.emitPaginationChange();
+    this.checkAndHandleFallbackPage();
   }
 
   /**
@@ -338,6 +340,7 @@ export class PaginationComponent implements OnChanges, OnDestroy, OnInit {
   public doPageSizeChange(pageSize: number) {
     this.updateParams({ page: 1, pageSize: pageSize });
     this.emitPaginationChange();
+    this.checkAndHandleFallbackPage();
   }
 
   /**
@@ -349,6 +352,7 @@ export class PaginationComponent implements OnChanges, OnDestroy, OnInit {
   public doSortDirectionChange(sortDirection: SortDirection) {
     this.updateParams({ page: 1, sortDirection: sortDirection });
     this.emitPaginationChange();
+    this.checkAndHandleFallbackPage();
   }
 
   /**
@@ -431,12 +435,29 @@ export class PaginationComponent implements OnChanges, OnDestroy, OnInit {
     );
   }
 
+  /**
+   * Check and handle fallback to the highest valid page if the current page is out of bounds.
+   */
+  private checkAndHandleFallbackPage() {
+    this.paginationService.getCurrentPagination(this.id, this.paginationOptions).pipe(take(1)).subscribe((currentPaginationOptions) => {
+      const pageSize = currentPaginationOptions.pageSize;
+      const currentPage = currentPaginationOptions.currentPage;
+      const totalPages = Math.max(1, Math.ceil(this.collectionSize / pageSize));
+      const correctedPage = this.paginationService.handlePaginationFallback(this.id, currentPage, totalPages);
+      if (correctedPage !== currentPage) {
+        this.updateParams({ page: correctedPage });
+        this.emitPaginationChange();
+      }
+    });
+  }
+
   /**
    * Go to the previous page
    */
   goPrev() {
     this.prev.emit(true);
     this.updatePagination(-1);
+    this.checkAndHandleFallbackPage();
   }
 
   /**
@@ -445,6 +466,7 @@ export class PaginationComponent implements OnChanges, OnDestroy, OnInit {
   goNext() {
     this.next.emit(true);
     this.updatePagination(1);
+    this.checkAndHandleFallbackPage();
   }
 
   /**