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common/resources/client/http/backend-response/pagination-response.ts

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+import {BackendResponse} from './backend-response';
+
+export interface LengthAwarePaginationResponse<T = unknown> {
+  data: T[];
+  from: number;
+  to: number;
+  total: number;
+  per_page: number;
+  current_page: number;
+  last_page: number;
+  next_page?: number;
+  prev_page?: number;
+}
+
+export interface SimplePaginationResponse<T = unknown> {
+  data: T[];
+  from: number;
+  to: number;
+  per_page: number;
+  current_page: number;
+  next_page?: number | null;
+  prev_page?: number | null;
+}
+
+interface CursorPaginationResponse<T> {
+  data: T[];
+  next_cursor: string | null;
+  per_page: number;
+  prev_cursor: string | null;
+}
+
+export type PaginationResponse<T> =
+  | LengthAwarePaginationResponse<T>
+  | SimplePaginationResponse<T>
+  | CursorPaginationResponse<T>;
+
+export const EMPTY_PAGINATION_RESPONSE = {
+  pagination: {data: [], from: 0, to: 0, per_page: 15, current_page: 1},
+};
+
+export interface PaginatedBackendResponse<T> extends BackendResponse {
+  pagination: PaginationResponse<T>;
+}
+
+export function hasPreviousPage(
+  pagination: PaginationResponse<unknown>,
+): boolean {
+  if ('prev_cursor' in pagination) {
+    return pagination.prev_cursor != null;
+  }
+
+  if ('prev_page' in pagination) {
+    return pagination.prev_page != null;
+  }
+
+  return pagination.current_page > 1;
+}
+
+export function hasNextPage(pagination: PaginationResponse<unknown>): boolean {
+  if ('next_cursor' in pagination) {
+    return pagination.next_cursor != null;
+  }
+
+  if ('last_page' in pagination) {
+    return pagination.current_page < pagination.last_page;
+  }
+
+  if ('next_page' in pagination) {
+    return pagination.next_page != null;
+  }
+
+  return (
+    pagination.data.length > 0 && pagination.data.length >= pagination.per_page
+  );
+}