interface NoteArticle {
	title: string;
	description: string | null;
	url: string;
	image: string;
	language: string;
	published: string;
	modified: string;
	author: { name: string; url: string | null };
	wiki: { name: string; url: string };
}

// schema.org for a note page: the article, and the trail from its wiki to it.
export function noteStructuredData(note: NoteArticle): Record<string, unknown> {
	return {
		"@context": "https://schema.org",
		"@graph": [
			{
				"@type": "Article",
				headline: note.title,
				...(note.description && { description: note.description }),
				url: note.url,
				image: note.image,
				inLanguage: note.language,
				datePublished: note.published,
				dateModified: note.modified,
				author: {
					"@type": "Person",
					name: note.author.name,
					...(note.author.url && { url: note.author.url }),
				},
				isPartOf: {
					"@type": "WebSite",
					name: note.wiki.name,
					url: note.wiki.url,
				},
			},
			{
				"@type": "BreadcrumbList",
				itemListElement: [
					{
						"@type": "ListItem",
						position: 1,
						name: note.wiki.name,
						item: note.wiki.url,
					},
					{
						"@type": "ListItem",
						position: 2,
						name: note.title,
						item: note.url,
					},
				],
			},
		],
	};
}