fix: handle URLSearchParams array values

packages/gasket-request/lib/index.d.ts

@@ -15,6 +15,13 @@ export type RequestLike = {
  */
 async function objectFromCookieStore(cookieStore: CookieStore): Promise<Record<string, string>>;
 
+/**
+ * Capture the search params as a key/value object
+ * Necessary to capture array values
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams
+ */
+async function objectFromSearchParams(searchParams: URLSearchParams): Record<string, string>;
+
 /**
  * Expected request shape for GasketActions
  */

packages/gasket-request/lib/request.js

@@ -28,6 +28,19 @@ async function objectFromCookieStore(cookieStore) {
     }, {});
 }
 
+/**
+ * @type {import('./index.js').objectFromSearchParams}
+ */
+function objectFromSearchParams(searchParams) {
+  const entries = Object.fromEntries(searchParams);
+  const keys = Object.keys(entries);
+  return keys.reduce((acc, key) => {
+    const value = searchParams.getAll(key);
+    acc[key] = value.length === 1 ? value[0] : value;
+    return acc;
+  }, {});
+}
+
 /**
  * @type {import('./index.js').makeGasketRequest}
  */
@@ -68,7 +81,7 @@ export async function makeGasketRequest(requestLike) {
       return new GasketRequest(Object.seal({
         headers: 'entries' in headers ? Object.fromEntries(headers.entries()) : headers,
         cookies: 'getAll' in cookies ? await objectFromCookieStore(cookies) : cookies,
-        query: query instanceof URLSearchParams ? Object.fromEntries(query) : query,
+        query: query instanceof URLSearchParams ? objectFromSearchParams(query) : query,
         path
       }));
     };

packages/gasket-request/test/request.test.js

@@ -80,6 +80,22 @@ describe('makeGasketRequest', () => {
     expect(result.query).toEqual({ query1: 'value1', query2: 'value2' });
   });
 
+  it('handles URLSearchParams array values', async () => {
+    const headers = new Map([['header1', 'value1'], ['header2', 'value2']]);
+    const query = new URLSearchParams({ query1: 'value1', query2: 'value2' });
+    query.append('query3', 'value3');
+    query.append('query3', 'value4');
+    const requestLike = { headers, cookies: {}, query };
+
+    const result = await makeGasketRequest(requestLike);
+
+    expect(result.query).toEqual({
+      query1: 'value1',
+      query2: 'value2',
+      query3: ['value3', 'value4']
+    });
+  });
+
   it('handles no query', async () => {
     const headers = new Map([['header1', 'value1'], ['header2', 'value2']]);
     const requestLike = { headers, cookies: {} };