APIs (#3)

* Initial RESTful API

* RESTful API tests

* Scrapping error handling refactored

* Initial GraphQL API

* GraphQL API tests

pages/api/v1/[[...slug]].ts

@@ -0,0 +1,49 @@
+import { NextApiHandler } from "next";
+import NextCors from "nextjs-cors";
+import { googleScrape, textToSpeechScrape } from "../../../utils/translate";
+
+type Data = {
+    translation?: string,
+    audio?: number[],
+    error?: string
+};
+
+const methods = ["GET"];
+
+const handler: NextApiHandler<Data> = async (req, res) => {
+    await NextCors(req, res, {
+        methods,
+        origin: "*",
+        preflightContinue: true
+    });
+
+    const {
+        query: { slug },
+        method
+    } = req;
+
+    if (!slug || !Array.isArray(slug) || slug.length !== 3)
+        return res.status(404).json({ error: "Not Found" });
+
+    if (!method || !methods.includes(method)) {
+        res.setHeader("Allow", methods);
+        return res.status(405).json({ error: "Method Not Allowed" });
+    }
+
+    const [source, target, query] = slug;
+
+    if (source === "audio") {
+        const audio = await textToSpeechScrape(target, query);
+        return audio
+            ? res.status(200).json({ audio })
+            : res.status(500).json({ error: "An error occurred while retrieving the audio" });
+    }
+
+    const { translationRes, errorMsg } = await googleScrape(source, target, query);
+
+    if (errorMsg)
+        return res.status(500).json({ error: errorMsg });
+    res.status(200).json({ translation: translationRes });
+}
+
+export default handler;