From 872ea83c50a38cacea30c77cd0e64ea67f36d2aa Mon Sep 17 00:00:00 2001
From: tabacoWang <7a6ac0@users.noreply.github.com>
Date: Tue, 2 Apr 2024 18:22:56 +0800
Subject: [PATCH] feat: admin panel user list pagination

---
 src/lib/components/common/Paginator.svelte | 254 +++++++++++++++++++++
 src/routes/(app)/admin/+page.svelte        |  18 +-
 2 files changed, 271 insertions(+), 1 deletion(-)
 create mode 100644 src/lib/components/common/Paginator.svelte

diff --git a/src/lib/components/common/Paginator.svelte b/src/lib/components/common/Paginator.svelte
new file mode 100644
index 00000000..dd5c5296
--- /dev/null
+++ b/src/lib/components/common/Paginator.svelte
@@ -0,0 +1,254 @@
+<script lang="ts">
+	import { createEventDispatcher } from 'svelte';
+
+	// Event Dispatcher
+	type PaginatorEvent = {
+		amount: number;
+		page: number;
+	};
+	const dispatch = createEventDispatcher<PaginatorEvent>();
+
+	// Props
+	/** Pass the page setting object. */
+	export let settings = { page: 0, limit: 5, size: 0, amounts: [1, 2, 5, 10] };
+	/** Sets selection and buttons to disabled state on-demand. */
+	export let disabled = false;
+	/** Show Previous and Next buttons. */
+	export let showPreviousNextButtons = true;
+	/** Show First and Last buttons. */
+	export let showFirstLastButtons = false;
+	/** Displays a numeric row of page buttons. */
+	export let showNumerals = false;
+	/** Maximum number of active page siblings in the numeric row.*/
+	export let maxNumerals = 1;
+	/** Provide classes to set flexbox justification. */
+	export let justify: string = 'justify-between';
+
+	// Props (select)
+	/** Set the text for the amount selection input. */
+	export let amountText = 'Items';
+
+	// Props (buttons)
+	/** Provide arbitrary classes to the active page buttons. */
+	export let active: string = 'bg-gray-100 dark:bg-gray-700';
+	/*** Set the base button classes. */
+	export let buttonClasses: string = '!px-3 !py-1.5';
+
+	/** Set the label for the pages separator. */
+	export let separatorText = 'of';
+
+	// Base Classes
+	const cBase = 'flex flex-col md:flex-row items-center space-y-4 md:space-y-0 md:space-x-4';
+	const cLabel = 'w-full md:w-auto';
+
+	// Local
+	let lastPage = Math.max(0, Math.ceil(settings.size / settings.limit - 1));
+	let controlPages: number[] = getNumerals();
+
+	function onChangeLength(): void {
+		/** @event {{ length: number }} amount - Fires when the amount selection input changes.  */
+		dispatch('amount', settings.limit);
+
+		lastPage = Math.max(0, Math.ceil(settings.size / settings.limit - 1));
+
+		// ensure page in limit range
+		if (settings.page > lastPage) {
+			settings.page = lastPage;
+		}
+
+		controlPages = getNumerals();
+	}
+
+	function gotoPage(page: number) {
+		if (page < 0) return;
+
+		settings.page = page;
+		/** @event {{ page: number }} page Fires when the next/back buttons are pressed. */
+		dispatch('page', settings.page);
+		controlPages = getNumerals();
+	}
+
+	// Full row - no ellipsis
+	function getFullNumerals() {
+		const pages = [];
+		for (let index = 0; index <= lastPage; index++) {
+			pages.push(index);
+		}
+		return pages;
+	}
+
+	function getNumerals() {
+		if (lastPage <= maxNumerals * 2 + 1) return getFullNumerals();
+
+		const pages = [];
+		const isWithinLeftSection = settings.page < maxNumerals + 2;
+		const isWithinRightSection = settings.page > lastPage - (maxNumerals + 2);
+
+		pages.push(0);
+		if (!isWithinLeftSection) pages.push(-1);
+
+		if (isWithinLeftSection || isWithinRightSection) {
+			// mid section - with only one ellipsis
+			const sectionStart = isWithinLeftSection ? 1 : lastPage - (maxNumerals + 2);
+			const sectionEnd = isWithinRightSection ? lastPage - 1 : maxNumerals + 2;
+			for (let i = sectionStart; i <= sectionEnd; i++) {
+				pages.push(i);
+			}
+		} else {
+			// mid section - with both ellipses
+			for (let i = settings.page - maxNumerals; i <= settings.page + maxNumerals; i++) {
+				pages.push(i);
+			}
+		}
+
+		if (!isWithinRightSection) pages.push(-1);
+		pages.push(lastPage);
+
+		return pages;
+	}
+
+	function updateSize(size: number) {
+		lastPage = Math.max(0, Math.ceil(size / settings.limit - 1));
+		controlPages = getNumerals();
+	}
+
+	// State
+	$: classesButtonActive = (page: number) => {
+		return page === settings.page ? `${active}` : '';
+	};
+	$: maxNumerals, onChangeLength();
+	$: updateSize(settings.size);
+
+	// Reactive Classes
+	$: classesBase = `${cBase} ${justify} ${$$props.class ?? ''}`;
+</script>
+
+<div class={classesBase}>
+	<!-- Select Amount -->
+	{#if settings.amounts.length}
+		<select
+			bind:value={settings.limit}
+			on:change={onChangeLength}
+			class="dark:bg-gray-900 w-fit pr-8 rounded py-2 px-2 text-sm bg-transparent outline-none"
+			{disabled}
+		>
+			{#each settings.amounts as amount}
+				<option value={amount}>{amount} {amountText}</option>
+			{/each}
+		</select>
+	{/if}
+	<!-- Controls -->
+	<div>
+		<!-- Button: First -->
+		{#if showFirstLastButtons}
+			<button
+				type="button"
+				class={buttonClasses}
+				on:click={() => {
+					gotoPage(0);
+				}}
+				disabled={disabled || settings.page === 0}
+			>
+				<svg
+					xmlns="http://www.w3.org/2000/svg"
+					viewBox="0 0 512 512"
+					fill="currentColor"
+					class="w-4 h-4"
+				>
+					<path
+						d="M41.4 233.4c-12.5 12.5-12.5 32.8 0 45.3l160 160c12.5 12.5 32.8 12.5 45.3 0s12.5-32.8 0-45.3L109.3 256 246.6 118.6c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0l-160 160zm352-160l-160 160c-12.5 12.5-12.5 32.8 0 45.3l160 160c12.5 12.5 32.8 12.5 45.3 0s12.5-32.8 0-45.3L301.3 256 438.6 118.6c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0z"
+					/>
+				</svg>
+			</button>
+		{/if}
+		<!-- Button: Back -->
+		{#if showPreviousNextButtons}
+			<button
+				type="button"
+				aria-label="Previous Page"
+				class={buttonClasses}
+				on:click={() => {
+					gotoPage(settings.page - 1);
+				}}
+				disabled={disabled || settings.page === 0}
+			>
+				<svg
+					xmlns="http://www.w3.org/2000/svg"
+					viewBox="0 0 448 512"
+					fill="currentColor"
+					class="w-4 h-4"
+				>
+					<path
+						d="M9.4 233.4c-12.5 12.5-12.5 32.8 0 45.3l160 160c12.5 12.5 32.8 12.5 45.3 0s12.5-32.8 0-45.3L109.2 288 416 288c17.7 0 32-14.3 32-32s-14.3-32-32-32l-306.7 0L214.6 118.6c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0l-160 160z"
+					/>
+				</svg>
+			</button>
+		{/if}
+		<!-- Center -->
+		{#if showNumerals === false}
+			<!-- Details -->
+			<button type="button" class="{buttonClasses} !text-sm">
+				{settings.page * settings.limit + 1}-{Math.min(
+					settings.page * settings.limit + settings.limit,
+					settings.size
+				)}&nbsp;<span class="opacity-50">{separatorText} {settings.size}</span>
+			</button>
+		{:else}
+			<!-- Numeric Row -->
+			{#each controlPages as page}
+				<button
+					type="button"
+					{disabled}
+					class="{buttonClasses} {classesButtonActive(page)}"
+					on:click={() => gotoPage(page)}
+				>
+					{page >= 0 ? page + 1 : '...'}
+				</button>
+			{/each}
+		{/if}
+		<!-- Button: Next -->
+		{#if showPreviousNextButtons}
+			<button
+				type="button"
+				class={buttonClasses}
+				on:click={() => {
+					gotoPage(settings.page + 1);
+				}}
+				disabled={disabled || (settings.page + 1) * settings.limit >= settings.size}
+			>
+				<svg
+					xmlns="http://www.w3.org/2000/svg"
+					viewBox="0 0 448 512"
+					fill="currentColor"
+					class="w-4 h-4"
+				>
+					<path
+						d="M438.6 278.6c12.5-12.5 12.5-32.8 0-45.3l-160-160c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3L338.8 224 32 224c-17.7 0-32 14.3-32 32s14.3 32 32 32l306.7 0L233.4 393.4c-12.5 12.5-12.5 32.8 0 45.3s32.8 12.5 45.3 0l160-160z"
+					/>
+				</svg>
+			</button>
+		{/if}
+		<!-- Button: last -->
+		{#if showFirstLastButtons}
+			<button
+				type="button"
+				class={buttonClasses}
+				on:click={() => {
+					gotoPage(lastPage);
+				}}
+				disabled={disabled || (settings.page + 1) * settings.limit >= settings.size}
+			>
+				<svg
+					xmlns="http://www.w3.org/2000/svg"
+					viewBox="0 0 512 512"
+					fill="currentColor"
+					class="w-4 h-4"
+				>
+					<path
+						d="M470.6 278.6c12.5-12.5 12.5-32.8 0-45.3l-160-160c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3L402.7 256 265.4 393.4c-12.5 12.5-12.5 32.8 0 45.3s32.8 12.5 45.3 0l160-160zm-352 160l160-160c12.5-12.5 12.5-32.8 0-45.3l-160-160c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3L210.7 256 73.4 393.4c-12.5 12.5-12.5 32.8 0 45.3s32.8 12.5 45.3 0z"
+					/>
+				</svg>
+			</button>
+		{/if}
+	</div>
+</div>
diff --git a/src/routes/(app)/admin/+page.svelte b/src/routes/(app)/admin/+page.svelte
index a90b3262..92a8315b 100644
--- a/src/routes/(app)/admin/+page.svelte
+++ b/src/routes/(app)/admin/+page.svelte
@@ -12,6 +12,7 @@
 	import { getSignUpEnabledStatus, toggleSignUpEnabledStatus } from '$lib/apis/auths';
 	import EditUserModal from '$lib/components/admin/EditUserModal.svelte';
 	import SettingsModal from '$lib/components/admin/SettingsModal.svelte';
+	import Paginator from '$lib/components/common/Paginator.svelte';
 
 	const i18n = getContext('i18n');
 
@@ -24,6 +25,13 @@
 	let showSettingsModal = false;
 	let showEditUserModal = false;
 
+	let paginatorSettings = {
+		page: 0,
+		limit: 5,
+		size: users.length,
+		amounts: [5, 10, 15, 20]
+	};
+
 	const updateRoleHandler = async (id, role) => {
 		const res = await updateUserRole(localStorage.token, id, role).catch((error) => {
 			toast.error(error);
@@ -64,6 +72,13 @@
 		}
 		loaded = true;
 	});
+
+	$: paginatedSource = users.slice(
+		paginatorSettings.page * paginatorSettings.limit,
+		paginatorSettings.page * paginatorSettings.limit + paginatorSettings.limit
+	);
+
+	$: paginatorSettings.size = users.length;
 </script>
 
 <svelte:head>
@@ -159,7 +174,7 @@
 										</tr>
 									</thead>
 									<tbody>
-										{#each users.filter((user) => {
+										{#each paginatedSource.filter((user) => {
 											if (search === '') {
 												return true;
 											} else {
@@ -265,6 +280,7 @@
 										{/each}
 									</tbody>
 								</table>
+								<Paginator bind:settings={paginatorSettings} showNumerals />
 							</div>
 
 							<div class=" text-gray-500 text-xs mt-2 text-right">