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path: root/src/routes/api/mangadex/manga/+server.ts
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export const GET = async ({ url }) => {
	let status = '';
	let error = false;

	switch (url.searchParams.get('status')) {
		case 'FINISHED':
			{
				status = 'completed';
			}
			break;
		case 'RELEASING':
			{
				status = 'ongoing';
			}
			break;
		case 'HIATUS':
			{
				status = 'hiatus';
			}
			break;
		case 'CANCELLED':
			{
				status = 'cancelled';
			}
			break;
	}

	const nullIfNullString = (s: string | null) => (s == 'null' ? null : s);
	const get = async (title: string) => {
		try {
			return await (
				await fetch(
					`https://api.mangadex.org/manga?title=${encodeURIComponent(
						title
					)}&year=${url.searchParams.get('year')}&status[]=${status}`
				)
			).json();
		} catch {
			error = true;
		}
	};

	let mangadexData = await get(
		nullIfNullString(url.searchParams.get('native')) ||
			nullIfNullString(url.searchParams.get('english')) ||
			nullIfNullString(url.searchParams.get('romaji')) ||
			''
	);

	if (error) return new Response('rate-limited');

	if (mangadexData['data'] === undefined || mangadexData['data'].length === 0) {
		mangadexData = await get(nullIfNullString(url.searchParams.get('english')) || '');

		if (mangadexData['data'] === undefined || mangadexData['data'].length === 0) {
			mangadexData = await get(nullIfNullString(url.searchParams.get('romaji')) || '');
		}
	}

	return Response.json(mangadexData);
};