Docs: Collection example (#19593)

* add basic collection example

* add card view example

* update example readme

* Add workspace view example with collection

Author: madsrasmussen

src/Umbraco.Web.UI.Client/examples/collection/README.md

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+# Collection Example
+
+This example demonstrates how to register a collection with collection views.
+
+The example includes:
+
+- Collection Registration
+- Collection Repository
+- Collection Pagination
+- Table Collection View
+- Card Collection View
+- Collection as a Dashboard
+- Collection as a Workspace View
+
+TODO: This example is not complete, it is missing the following features:
+
+- Collection Action
+- Collection Filtering
+- Entity Actions
+- Selection + Bulk Actions

src/Umbraco.Web.UI.Client/examples/collection/collection/card-view/collection-view.element.ts

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+import type { ExampleCollectionItemModel } from '../repository/types.js';
+import type { UmbDefaultCollectionContext } from '@umbraco-cms/backoffice/collection';
+import { UMB_COLLECTION_CONTEXT } from '@umbraco-cms/backoffice/collection';
+import { css, html, customElement, state, repeat } from '@umbraco-cms/backoffice/external/lit';
+import { UmbTextStyles } from '@umbraco-cms/backoffice/style';
+import { UmbLitElement } from '@umbraco-cms/backoffice/lit-element';
+
+@customElement('example-card-collection-view')
+export class ExampleCardCollectionViewElement extends UmbLitElement {
+	@state()
+	private _items: Array<ExampleCollectionItemModel> = [];
+
+	#collectionContext?: UmbDefaultCollectionContext<ExampleCollectionItemModel>;
+
+	constructor() {
+		super();
+
+		this.consumeContext(UMB_COLLECTION_CONTEXT, (instance) => {
+			this.#collectionContext = instance;
+			this.#observeCollectionItems();
+		});
+	}
+
+	#observeCollectionItems() {
+		this.observe(this.#collectionContext?.items, (items) => (this._items = items || []), 'umbCollectionItemsObserver');
+	}
+
+	override render() {
+		return html`
+			<div id="card-grid">
+				${repeat(
+					this._items,
+					(item) => item.unique,
+					(item) =>
+						html` <uui-card>
+							<uui-icon name="icon-newspaper"></uui-icon>
+							<div>${item.name}</div>
+						</uui-card>`,
+				)}
+			</div>
+		`;
+	}
+
+	static override styles = [
+		UmbTextStyles,
+		css`
+			:host {
+				display: flex;
+				flex-direction: column;
+			}
+
+			#card-grid {
+				display: grid;
+				grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
+				grid-auto-rows: 200px;
+				gap: var(--uui-size-space-5);
+			}
+
+			uui-card {
+				display: flex;
+				flex-direction: column;
+				align-items: center;
+				justify-content: center;
+				text-align: center;
+				height: 100%;
+
+				uui-icon {
+					font-size: 2em;
+					margin-bottom: var(--uui-size-space-4);
+				}
+			}
+		`,
+	];
+}
+
+export { ExampleCardCollectionViewElement as element };
+
+declare global {
+	interface HTMLElementTagNameMap {
+		'example-card-collection-view': ExampleCardCollectionViewElement;
+	}
+}

src/Umbraco.Web.UI.Client/examples/collection/collection/card-view/index.ts

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+export { UMB_LANGUAGE_TABLE_COLLECTION_VIEW_ALIAS } from './manifests.js';

src/Umbraco.Web.UI.Client/examples/collection/collection/card-view/manifests.ts

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+import { EXAMPLE_COLLECTION_ALIAS } from '../constants.js';
+import { UMB_COLLECTION_ALIAS_CONDITION } from '@umbraco-cms/backoffice/collection';
+
+export const manifests: Array<UmbExtensionManifest> = [
+	{
+		type: 'collectionView',
+		alias: 'Example.CollectionView.Card',
+		name: 'Example Card Collection View',
+		js: () => import('./collection-view.element.js'),
+		weight: 50,
+		meta: {
+			label: 'Card',
+			icon: 'icon-grid',
+			pathName: 'card',
+		},
+		conditions: [
+			{
+				alias: UMB_COLLECTION_ALIAS_CONDITION,
+				match: EXAMPLE_COLLECTION_ALIAS,
+			},
+		],
+	},
+];

src/Umbraco.Web.UI.Client/examples/collection/collection/constants.ts

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+export const EXAMPLE_COLLECTION_ALIAS = 'Example.Collection';

src/Umbraco.Web.UI.Client/examples/collection/collection/manifests.ts

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+import { EXAMPLE_COLLECTION_ALIAS } from './constants.js';
+import { EXAMPLE_COLLECTION_REPOSITORY_ALIAS } from './repository/constants.js';
+import { manifests as cardViewManifests } from './card-view/manifests.js';
+import { manifests as repositoryManifests } from './repository/manifests.js';
+import { manifests as tableViewManifests } from './table-view/manifests.js';
+
+export const manifests: Array<UmbExtensionManifest> = [
+	{
+		type: 'collection',
+		kind: 'default',
+		alias: EXAMPLE_COLLECTION_ALIAS,
+		name: 'Example Collection',
+		meta: {
+			repositoryAlias: EXAMPLE_COLLECTION_REPOSITORY_ALIAS,
+		},
+	},
+	...cardViewManifests,
+	...repositoryManifests,
+	...tableViewManifests,
+];

src/Umbraco.Web.UI.Client/examples/collection/collection/repository/collection.repository.ts

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+import type { ExampleCollectionFilterModel, ExampleCollectionItemModel } from './types.js';
+import { UmbRepositoryBase } from '@umbraco-cms/backoffice/repository';
+import type { UmbCollectionRepository } from '@umbraco-cms/backoffice/collection';
+
+export class ExampleCollectionRepository
+	extends UmbRepositoryBase
+	implements UmbCollectionRepository<ExampleCollectionItemModel, ExampleCollectionFilterModel>
+{
+	async requestCollection(args: ExampleCollectionFilterModel) {
+		const skip = args.skip || 0;
+		const take = args.take || 10;
+
+		// Simulating a data fetch. This would in most cases be replaced with an API call.
+		let items = [
+			{
+				unique: '3e31e9c5-7d66-4c99-a9e5-d9f2b1e2b22f',
+				entityType: 'example',
+				name: 'Example Item 1',
+			},
+			{
+				unique: 'bc9b6e24-4b11-4dd6-8d4e-7c4f70e59f3c',
+				entityType: 'example',
+				name: 'Example Item 2',
+			},
+			{
+				unique: '5a2f4e3a-ef7e-470e-8c3c-3d859c02ae0d',
+				entityType: 'example',
+				name: 'Example Item 3',
+			},
+			{
+				unique: 'f4c3d8b8-6d79-4c87-9aa9-56b1d8fda702',
+				entityType: 'example',
+				name: 'Example Item 4',
+			},
+			{
+				unique: 'c9f0a8a3-1b49-4724-bde3-70e31592eb6e',
+				entityType: 'example',
+				name: 'Example Item 5',
+			},
+		];
+
+		// Simulating filtering based on the args
+		if (args.filter) {
+			items = items.filter((item) => item.name.toLowerCase().includes(args.filter!.toLowerCase()));
+		}
+
+		// Get the total number of items before pagination
+		const totalItems = items.length;
+
+		// Simulating pagination
+		const start = skip;
+		const end = start + take;
+		items = items.slice(start, end);
+
+		const data = {
+			items,
+			total: totalItems,
+		};
+
+		return { data };
+	}
+}
+
+export { ExampleCollectionRepository as api };

src/Umbraco.Web.UI.Client/examples/collection/collection/repository/constants.ts

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+export const EXAMPLE_COLLECTION_REPOSITORY_ALIAS = 'Example.Repository.Collection';

src/Umbraco.Web.UI.Client/examples/collection/collection/repository/manifests.ts

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+import { EXAMPLE_COLLECTION_REPOSITORY_ALIAS } from './constants.js';
+
+export const manifests: Array<UmbExtensionManifest> = [
+	{
+		type: 'repository',
+		alias: EXAMPLE_COLLECTION_REPOSITORY_ALIAS,
+		name: 'Example Collection Repository',
+		api: () => import('./collection.repository.js'),
+	},
+];

src/Umbraco.Web.UI.Client/examples/collection/collection/repository/types.ts

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+import type { UmbCollectionFilterModel } from '@umbraco-cms/backoffice/collection';
+
+export interface ExampleCollectionItemModel {
+	unique: string;
+	entityType: string;
+	name: string;
+}
+
+export interface ExampleCollectionFilterModel extends UmbCollectionFilterModel {}