refactor: update schema handling and improve SEO metadata

- Changed schema type from WithContext<Thing> to Thing[] in Head, BaseLayout, and JsonLd components for better flexibility.
- Added optional robots meta tag to Head component.
- Updated JSON-LD generation in JsonLd component to include a structured payload.
- Enhanced page and blog schemas to support breadcrumb and person schemas for improved SEO.
- Introduced new utility schemas for website and person to streamline schema generation.
- Refactored existing schemas to align with the new structure and ensure consistency across components.

1 files changed, 28 insertions, 15 deletions

diff --git a/src/utils/schemas/pageSchema.ts b/src/utils/schemas/pageSchema.ts
index 606488b..ba8fd86 100644
--- a/src/utils/schemas/pageSchema.ts
+++ b/src/utils/schemas/pageSchema.ts
@@ -1,23 +1,36 @@
-import type { WithContext, WebPage } from "schema-dts";
+import type { ProfilePage, WebPage } from "schema-dts";
+import { personId, websiteId } from "./ids";
 
 export type WebsiteSchemaParams = {
 	readonly description: string;
+	readonly lang: string;
+	readonly mainEntityId?: string;
 	readonly page: string;
 	readonly siteUrl: string;
 	readonly title: string;
-	readonly lang: string;
+	readonly type?: "WebPage" | "ProfilePage";
 };
 
-export default ({ siteUrl, page, title, description, lang }: WebsiteSchemaParams): WithContext<WebPage> => ({
-	"@context": "https://schema.org",
-	"@type": "WebPage",
-	"@id": new URL(page, siteUrl).toString(),
-	"url": new URL(page, siteUrl).toString(),
-	"name": title,
-	"description": description,
-	"inLanguage": lang,
-	"mainEntity": {
-		"@type": "WebSite",
-		"@id": new URL("/", siteUrl).toString(),
-	},
-});
+export default ({ siteUrl, page, title, description, lang, type = "WebPage", mainEntityId }: WebsiteSchemaParams): WebPage | ProfilePage => {
+	const url = new URL(page, siteUrl).toString();
+
+	const base = {
+		"@type": type,
+		"@id": url,
+		"url": url,
+		"name": title,
+		"description": description,
+		"inLanguage": lang,
+		"isPartOf": { "@id": websiteId(siteUrl) },
+	} as const;
+
+	if (type === "ProfilePage") {
+		return {
+			...base,
+			"@type": "ProfilePage",
+			"mainEntity": { "@id": mainEntityId ?? personId(siteUrl) },
+		};
+	}
+
+	return base;
+};