From ef727d084f77e073c72a739b87d89fd37f2ebf7d Mon Sep 17 00:00:00 2001
From: Aigamo <51428094+ycanardeau@users.noreply.github.com>
Date: Tue, 6 Jul 2021 21:06:52 +1000
Subject: [PATCH] Create ServerSidePaging

---
 .../Partials/Knockout/ServerSidePaging.tsx    | 58 +++++++++++++
 .../Scripts/Stores/ServerSidePagingStore.ts   | 86 +++++++++++++++++++
 2 files changed, 144 insertions(+)
 create mode 100644 VocaDbWeb/Scripts/Components/Shared/Partials/Knockout/ServerSidePaging.tsx
 create mode 100644 VocaDbWeb/Scripts/Stores/ServerSidePagingStore.ts

diff --git a/VocaDbWeb/Scripts/Components/Shared/Partials/Knockout/ServerSidePaging.tsx b/VocaDbWeb/Scripts/Components/Shared/Partials/Knockout/ServerSidePaging.tsx
new file mode 100644
index 0000000000..1061b2214b
--- /dev/null
+++ b/VocaDbWeb/Scripts/Components/Shared/Partials/Knockout/ServerSidePaging.tsx
@@ -0,0 +1,58 @@
+import Pagination from '@Bootstrap/Pagination';
+import ServerSidePagingStore from '@Stores/ServerSidePagingStore';
+import { observer } from 'mobx-react-lite';
+import React from 'react';
+import { useTranslation } from 'react-i18next';
+
+interface ServerSidePagingProps {
+	store: ServerSidePagingStore;
+}
+
+const ServerSidePaging = observer(
+	({ store }: ServerSidePagingProps): React.ReactElement => {
+		const { t } = useTranslation(['VocaDb.Web.Resources.Other']);
+
+		return (
+			<Pagination /* TODO */>
+				<Pagination.First
+					disabled={store.isFirstPage}
+					onClick={store.goToFirstPage}
+				>
+					&laquo;&laquo; {t('VocaDb.Web.Resources.Other:PagedList.First')}
+				</Pagination.First>
+				<Pagination.Prev
+					disabled={store.isFirstPage}
+					onClick={store.previousPage}
+				>
+					&laquo; {t('VocaDb.Web.Resources.Other:PagedList.Previous')}
+				</Pagination.Prev>
+
+				{store.showMoreBegin && <Pagination.Ellipsis disabled />}
+
+				{store.pages.map((page) => (
+					<Pagination.Item
+						active={page === store.page}
+						onClick={(): void => store.setPage(page)}
+						key={page}
+					>
+						{page}
+					</Pagination.Item>
+				))}
+
+				{store.showMoreEnd && <Pagination.Ellipsis disabled />}
+
+				<Pagination.Next disabled={store.isLastPage} onClick={store.nextPage}>
+					{t('VocaDb.Web.Resources.Other:PagedList.Next')} &raquo;
+				</Pagination.Next>
+				<Pagination.Last
+					disabled={store.isLastPage}
+					onClick={store.goToLastPage}
+				>
+					{t('VocaDb.Web.Resources.Other:PagedList.Last')} &raquo;&raquo;
+				</Pagination.Last>
+			</Pagination>
+		);
+	},
+);
+
+export default ServerSidePaging;
diff --git a/VocaDbWeb/Scripts/Stores/ServerSidePagingStore.ts b/VocaDbWeb/Scripts/Stores/ServerSidePagingStore.ts
new file mode 100644
index 0000000000..e9569268fc
--- /dev/null
+++ b/VocaDbWeb/Scripts/Stores/ServerSidePagingStore.ts
@@ -0,0 +1,86 @@
+import _ from 'lodash';
+import { action, computed, makeObservable, observable } from 'mobx';
+
+export default class ServerSidePagingStore {
+	@observable public page = 1;
+	@action public setPage = (value: number): void => {
+		this.page = value;
+	};
+
+	@observable public totalItems = 0;
+	@action public setTotalItems = (value: number): void => {
+		this.totalItems = value;
+	};
+
+	@observable public pageSize = 10;
+	@action public setPageSize = (value: number): void => {
+		this.pageSize = value;
+	};
+
+	public constructor(pageSize: number = 10) {
+		makeObservable(this);
+
+		this.pageSize = pageSize;
+	}
+
+	@computed public get firstItem(): number {
+		return (this.page - 1) * this.pageSize;
+	}
+
+	@computed public get totalPages(): number {
+		return Math.ceil(this.totalItems / this.pageSize);
+	}
+
+	@computed public get hasMultiplePages(): boolean {
+		return this.totalPages > 1;
+	}
+
+	@computed public get isFirstPage(): boolean {
+		return this.page <= 1;
+	}
+
+	@computed public get isLastPage(): boolean {
+		return this.page >= this.totalPages;
+	}
+
+	@computed public get pages(): number[] {
+		const start = Math.max(this.page - 4, 1);
+		const end = Math.min(this.page + 4, this.totalPages);
+
+		return _.range(start, end + 1);
+	}
+
+	@computed public get showMoreBegin(): boolean {
+		return this.page > 5;
+	}
+
+	@computed public get showMoreEnd(): boolean {
+		return this.page < this.totalPages - 4;
+	}
+
+	public getPagingProperties = (
+		clearResults: boolean = false,
+	): { start: number; maxEntries: number; getTotalCount: boolean } => {
+		return {
+			start: this.firstItem,
+			maxEntries: this.pageSize,
+			getTotalCount: clearResults || this.totalItems === 0,
+		};
+	};
+
+	@action public goToFirstPage = (): void => {
+		this.page = 1;
+	};
+
+	@action public goToLastPage = (): void => {
+		this.page = this.totalPages;
+	};
+
+	@action public nextPage = (): void => {
+		if (!this.isLastPage) this.page = this.page + 1;
+	};
+
+	@action public previousPage = (): void => {
+		if (!this.isFirstPage) this.page = this.page - 1;
+	};
+}