Enhance buscar-bibliografia function with Open Library integration and parameter handling

supabase/functions/buscar-bibliografia/index.ts

@@ -6,6 +6,11 @@ import { HttpError, sendError, sendSuccess } from "../_shared/utils.ts";
 console.log("Starting buscar-bibliografia function");
 
 type GoogleBooksVolume = Record<string, unknown>;
+type OpenLibraryDoc = Record<string, unknown>;
+
+type EndpointResult =
+  | { endpoint: "google"; item: GoogleBooksVolume }
+  | { endpoint: "open_library"; item: OpenLibraryDoc };
 
 interface GoogleBooksVolumesListResponse {
   kind?: string;
@@ -13,17 +18,54 @@ interface GoogleBooksVolumesListResponse {
   items?: GoogleBooksVolume[];
 }
 
+interface OpenLibrarySearchResponse {
+  num_found?: number;
+  start?: number;
+  docs?: OpenLibraryDoc[];
+}
+
+const ISO6391 = z.string().regex(
+  /^[a-z]{2}$/i,
+  "Debe ser ISO 639-1 (2 letras)",
+);
+const ISO6392 = z.string().regex(
+  /^[a-z]{3}$/i,
+  "Debe ser ISO 639-2 (3 letras)",
+);
+
 const SearchTermsSchema = z
   .object({
     q: z.string().min(1, "q es requerido"),
-    maxResults: z.number().int().min(0).max(40),
-    orderBy: z.enum(["newest", "relevance"]).optional(),
   })
-  .passthrough();
+  .strict();
+
+const GoogleParamsSchema = z
+  .object({
+    orderBy: z.enum(["newest", "relevance"]).optional(),
+    langRestrict: ISO6391.optional(),
+    startIndex: z.number().int().min(0).optional(),
+  })
+  .passthrough()
+  .optional()
+  .default({});
+
+const OpenLibraryParamsSchema = z
+  .object({
+    language: ISO6392.optional(),
+    page: z.number().int().min(1).optional(),
+    sort: z.string().optional(),
+  })
+  .passthrough()
+  .optional()
+  .default({});
 
 const BodySchema = z
   .object({
     searchTerms: SearchTermsSchema,
+
+    // Parámetros por endpoint
+    google: GoogleParamsSchema,
+    openLibrary: OpenLibraryParamsSchema,
   })
   .strict();
 
@@ -57,6 +99,40 @@ function buildUrlWithSearchTerms(
   return url.toString();
 }
 
+function pickSerializableParams(
+  input: Record<string, unknown>,
+): Record<
+  string,
+  string | number | boolean | Array<string | number | boolean>
+> {
+  const out: Record<
+    string,
+    string | number | boolean | Array<string | number | boolean>
+  > = {};
+
+  for (const [key, value] of Object.entries(input)) {
+    if (value === undefined || value === null) continue;
+
+    if (Array.isArray(value)) {
+      const arr = value
+        .filter((v) => v !== undefined && v !== null)
+        .filter((v) =>
+          ["string", "number", "boolean"].includes(typeof v)
+        ) as Array<
+          string | number | boolean
+        >;
+      if (arr.length) out[key] = arr;
+      continue;
+    }
+
+    if (["string", "number", "boolean"].includes(typeof value)) {
+      out[key] = value as string | number | boolean;
+    }
+  }
+
+  return out;
+}
+
 Deno.serve(async (req: Request): Promise<Response> => {
   const url = new URL(req.url);
   const functionName = url.pathname.split("/").pop();
@@ -117,17 +193,40 @@ Deno.serve(async (req: Request): Promise<Response> => {
     }
 
     const baseUrl = "https://www.googleapis.com/books/v1/volumes";
-    const requestUrl = buildUrlWithSearchTerms(baseUrl, {
+    const googleParams = pickSerializableParams({
+      ...body.google,
       ...body.searchTerms,
       key: GOOGLE_API_KEY,
+      maxResults: 20,
+      startIndex: (body.google as Record<string, unknown>)?.startIndex ?? 0,
     });
+    // No mandar parámetros exclusivos de Open Library a Google
+    delete (googleParams as Record<string, unknown>)["page"];
+    delete (googleParams as Record<string, unknown>)["language"];
 
-    const googleResp = await fetch(requestUrl, {
-      method: "GET",
-      headers: {
-        Accept: "application/json",
-      },
+    const googleUrl = buildUrlWithSearchTerms(baseUrl, googleParams);
+
+    const openLibraryBaseUrl = "https://openlibrary.org/search.json";
+    const openLibraryParams = pickSerializableParams({
+      ...body.openLibrary,
+      q: body.searchTerms.q,
+      limit: 20,
+      page: (body.openLibrary as Record<string, unknown>)?.page ?? 1,
     });
+    // No mandar parámetros exclusivos de Google a Open Library
+    delete (openLibraryParams as Record<string, unknown>)["langRestrict"];
+    delete (openLibraryParams as Record<string, unknown>)["orderBy"];
+    delete (openLibraryParams as Record<string, unknown>)["startIndex"];
+
+    const openLibraryUrl = buildUrlWithSearchTerms(
+      openLibraryBaseUrl,
+      openLibraryParams,
+    );
+
+    const [googleResp, openLibraryResp] = await Promise.all([
+      fetch(googleUrl, { headers: { Accept: "application/json" } }),
+      fetch(openLibraryUrl, { headers: { Accept: "application/json" } }),
+    ]);
 
     if (!googleResp.ok) {
       const text = await googleResp.text().catch(() => "");
@@ -143,10 +242,40 @@ Deno.serve(async (req: Request): Promise<Response> => {
       );
     }
 
-    const data = (await googleResp.json()) as GoogleBooksVolumesListResponse;
-    const items = Array.isArray(data?.items) ? data.items : [];
+    if (!openLibraryResp.ok) {
+      const text = await openLibraryResp.text().catch(() => "");
+      throw new HttpError(
+        502,
+        "Error al consultar Open Library.",
+        "OPEN_LIBRARY_REQUEST_FAILED",
+        {
+          status: openLibraryResp.status,
+          statusText: openLibraryResp.statusText,
+          body: text || null,
+        },
+      );
+    }
 
-    return sendSuccess(items);
+    const googleData =
+      (await googleResp.json()) as GoogleBooksVolumesListResponse;
+    const openLibraryData =
+      (await openLibraryResp.json()) as OpenLibrarySearchResponse;
+
+    const googleItems = Array.isArray(googleData?.items)
+      ? googleData.items.slice(0, 20)
+      : [];
+    const openLibraryDocs = Array.isArray(openLibraryData?.docs)
+      ? openLibraryData.docs.slice(0, 20)
+      : [];
+
+    const results: EndpointResult[] = [
+      ...googleItems.map((item) => ({ endpoint: "google", item } as const)),
+      ...openLibraryDocs.map((
+        item,
+      ) => ({ endpoint: "open_library", item } as const)),
+    ];
+
+    return sendSuccess(results);
   } catch (error) {
     if (error instanceof HttpError) {
       console.error(