chore: import upstream snapshot with attribution

docs-website/api/search.ts

@@ -0,0 +1,73 @@
+import { VercelRequest, VercelResponse } from "@vercel/node";
+
+export default async function handler(req: VercelRequest, res: VercelResponse) {
+  if (req.method !== "POST") {
+    res.setHeader("Allow", "POST");
+    return res.status(405).end("Method Not Allowed");
+  }
+
+  const { query, filter } = req.body;
+
+  if (!query) {
+    return res.status(400).json({ error: "Query is required" });
+  }
+
+  const { SEARCH_API_WORKSPACE, SEARCH_API_PIPELINE, SEARCH_API_TOKEN } =
+    process.env;
+
+  if (!SEARCH_API_WORKSPACE || !SEARCH_API_PIPELINE || !SEARCH_API_TOKEN) {
+    console.error(
+      "Search API environment variables are not configured on the server."
+    );
+    return res.status(500).json({ error: "Search service is not configured." });
+  }
+
+  try {
+    // Build the request body with optional filters
+    const requestBody: any = {
+      queries: [query],
+    };
+
+    // Add filters if provided (for future backend filtering support)
+    if (filter && filter !== "all") {
+      requestBody.debug = true;
+      requestBody.filters = {
+        operator: "AND",
+        conditions: [
+          {
+            field: "meta.type",
+            operator: "==",
+            value: filter,
+          },
+        ],
+      };
+    }
+
+    const apiResponse = await fetch(
+      `https://api.cloud.deepset.ai/api/v1/workspaces/${SEARCH_API_WORKSPACE}/pipelines/${SEARCH_API_PIPELINE}/search`,
+      {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+          "X-Client-Source": "haystack-docs",
+          Authorization: `Bearer ${SEARCH_API_TOKEN}`,
+        },
+        body: JSON.stringify(requestBody),
+      }
+    );
+
+    if (!apiResponse.ok) {
+      const errorData = await apiResponse.text();
+      console.error("Haystack API error:", errorData);
+      return res
+        .status(apiResponse.status)
+        .json({ error: `API error: ${apiResponse.statusText}` });
+    }
+
+    const data = await apiResponse.json();
+    return res.status(200).json(data);
+  } catch (error) {
+    console.error("Internal server error:", error);
+    return res.status(500).json({ error: "Failed to fetch search results." });
+  }
+}