Reworked access to tags as public viewer

pages/api/v1/public/collections/tags/index.ts

@@ -0,0 +1,35 @@
+import getPublicLinksUnderCollection from "@/lib/api/controllers/public/links/getPublicLinksUnderCollection";
+import getTags from "@/lib/api/controllers/tags/getTags";
+import { LinkRequestQuery } from "@/types/global";
+import type { NextApiRequest, NextApiResponse } from "next";
+
+export default async function collections(
+  req: NextApiRequest,
+  res: NextApiResponse
+) {
+  if (req.method === "GET") {
+    // Convert the type of the request query to "LinkRequestQuery"
+    const convertedData: Omit<LinkRequestQuery, "tagId"> = {
+      sort: Number(req.query.sort as string),
+      collectionId: req.query.collectionId
+        ? Number(req.query.collectionId as string)
+        : undefined,
+    };
+
+    if (!convertedData.collectionId) {
+      return res
+        .status(400)
+        .json({ response: "Please choose a valid collection." });
+    }
+
+    const links = await getPublicLinksUnderCollection(convertedData, true);
+    const tags = await getTags();
+    const tagsInLinks = links.response.map(l => l.tags).flat().filter((value, index, self) =>
+  index === self.findIndex((t) => (
+    t.name === value.name
+  ))).map(t => t.id);
+    const tagsWithCount = tags.response.filter(tag => tagsInLinks.includes(tag.id));
+    
+    return res.status(links.status).json({ response: tagsWithCount });
+  }
+}