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---
import smartypants from 'smartypants';

type SEOMetadata = {
	name?: string;
	title: string;
	description: string;
	image?: { src: string; alt: string };
	canonicalURL?: URL | null;
	locale?: string;
};

type OpenGraph = Partial<SEOMetadata> & {
	type?: string;
};

type Twitter = Partial<SEOMetadata> & {
	handle?: string;
	card?: 'summary' | 'summary_large_image';
};

export type Props = SEOMetadata & {
	og?: OpenGraph;
	twitter?: Twitter;
};

const {
	name,
	description,
	image,
	locale = 'en',
	canonicalURL = new URL(Astro.url.pathname, Astro.site),
	og: _og = {},
	twitter: _twitter = {},
} = Astro.props;

const title = [Astro.props.title, name].filter(Boolean).join(' | ');
const og: OpenGraph = { name, title, description, canonicalURL, image, locale, type: 'website', ..._og };
const twitter: Twitter = { name, title, description, canonicalURL, image, locale, card: 'summary_large_image', ..._twitter };
const ensureSlash = (url: string | URL) => `${url.toString().replace(/\/$/, '')}/`;
---

<!-- Global Metadata -->
<meta charset="utf-8" />
<meta name="generator" content={Astro.generator} />
<meta name="viewport" content="width=device-width" />
<meta name="theme-color" content="#d2e1f9" />
<link rel="icon" type="image/svg+xml" href="/favicon.svg" />
<link rel="mask-icon" href="/favicon.svg" color="#d2e1f9" />
<link rel="sitemap" href="/sitemap-index.xml" />
<link rel="alternate" type="application/rss+xml" href="/rss.xml" title="RSS" />

<title set:html={smartypants(title, 1)} />

<!-- Page Metadata -->
<meta name="generator" content={Astro.generator} />
{canonicalURL && <link rel="canonical" href={ensureSlash(canonicalURL)} />}
<title>{title}</title>
<meta name="description" content={description} />

<!-- OpenGraph Tags -->
<meta property="og:title" content={og.title} />
<meta property="og:type" content={og.type} />
{og.canonicalURL && <meta property="og:url" content={ensureSlash(og.canonicalURL)} />}
<meta property="og:locale" content={og.locale} />
<meta property="og:description" content={og.description} />
<meta property="og:site_name" content={og.name} />
{
	og.image && (
		<>
			<meta property="og:image" content={og.image.src} />
			<meta property="og:image:alt" content={og.image.alt} />
		</>
	)
}

<!-- Twitter Tags -->
{twitter.card && <meta name="twitter:card" content={twitter.card} />}
{twitter.handle && <meta name="twitter:site" content={twitter.handle} />}
<meta name="twitter:title" content={twitter.title} />
<meta name="twitter:description" content={twitter.description} />
{
	twitter.image && (
		<>
			<meta name="twitter:image" content={twitter.image.src} />
			<meta name="twitter:image:alt" content={twitter.image.alt} />
		</>
	)
}