Implemented e-mail notification trigger.

pages/admin/emails/@template/+onBeforeRender.js

@@ -0,0 +1,38 @@
+import { render } from 'vike/abort';
+
+import { emailTemplates, listEmailTemplates } from '#/src/email-templates.js';
+
+export default async function onBeforeRender(pageContext) {
+	if (!pageContext.user || pageContext.user.role === 'user') {
+		throw render(404);
+	}
+
+	const { template } = pageContext.routeParams;
+
+	if (!listEmailTemplates().includes(template)) {
+		throw render(404);
+	}
+
+	let html = null;
+	let text = null;
+	let error = null;
+
+	try {
+		({ html, text } = await emailTemplates.render(`${template}.vue`));
+	}
+	catch (renderError) {
+		error = renderError.message;
+	}
+
+	return {
+		pageContext: {
+			title: `E-mail Preview: ${template}`,
+			pageProps: {
+				template,
+				html,
+				text,
+				error,
+			},
+		},
+	};
+}