!feat: major 3.0 release candidate

entrypoints/content.ts

@@ -0,0 +1,46 @@
+import getLogger from "@/utils/getLogger";
+import { sendMessage } from "@/utils/messaging";
+
+// This content script is injected into each browser tab.
+// It's purpose is to retrive an OpenGraph thumbnail URL from the metadata
+
+export default defineContentScript({
+	matches: ["<all_urls>"],
+	runAt: "document_idle",
+	main
+});
+
+const logger = getLogger("contentScript");
+
+async function main(): Promise<void>
+{
+	logger("init");
+
+	// This method tries to sequentially retrieve thumbnails from all know meta tags.
+	// It stops on the first thumbnail found.
+
+	// The order of search is:
+	// 1. <meta property="og:image" content="https://example.com/image.jpg">
+	// 2. <meta name="twitter:image" content="https://example.com/image.jpg">
+	// 3. <link rel="thumbnail" href="https://example.com/thumbnail.jpg">
+	// 4. <link rel="image_src" href="https://example.com/image.jpg">
+
+	const thumbnailUrl: string | undefined =
+		document.querySelector<HTMLMetaElement>("head meta[property='og:image']")?.content ??
+		document.querySelector<HTMLMetaElement>("head meta[name='twitter:image']")?.content ??
+		document.querySelector<HTMLLinkElement>("head link[rel=thumbnail]")?.href ??
+		document.querySelector<HTMLLinkElement>("head link[rel=image_src]")?.href;
+
+	if (thumbnailUrl)
+	{
+		logger(`Found thumbnail for "${document.location.href}"`, thumbnailUrl);
+		await sendMessage("addThumbnail", {
+			url: document.location.href,
+			thumbnail: thumbnailUrl
+		});
+	}
+	else
+		logger(`No thumbnail found for "${document.location.href}"`);
+
+	logger("done");
+}