Init commit

utils/paginated-array.ts

@@ -0,0 +1,50 @@
+export class PaginatedArray<T> extends Array<T> {
+  pageSize: number;
+  items: Array<T>;
+  pageIndex: number;
+  totalPages: number;
+  
+  constructor(items: Array<T>, pageIndex: number, pageSize: number) {
+    super();
+
+    this.pageSize = pageSize;
+    this.items = items;
+
+    this.pageIndex = pageIndex;
+    this.totalPages = Math.ceil(items.length / pageSize);   
+    
+    this.push(...items.slice((pageIndex - 1) * pageSize).slice(0, pageSize));
+  }
+
+  public get hasFurtherPreviousPage() {
+    return this.pageIndex > 2;
+  }
+
+  public get hasPreviousPage() {
+    return this.pageIndex > 1;
+  }
+
+  public get hasNextPage() {
+    return this.pageIndex < this.totalPages;
+  }
+
+  public get hasFurtherNextPage() {
+    return this.pageIndex < this.totalPages - 1;
+  }
+
+  public get furtherPreviousPage() {
+    return this.pageIndex - 2;
+  }
+
+  public get previousPage() {
+    return this.pageIndex - 1;
+  }
+
+  public get nextPage() {
+    return this.pageIndex + 1;
+  }
+
+  public get furtherNextPage() {
+    return this.pageIndex + 2;
+  }
+}