Add sorting

src/pagination.ts

@@ -9,6 +9,29 @@ export const pageMetadata = z.object({
 export const pageQueryParams = z.object({
   page: z.number().optional(),
   pageSize: z.number().optional(),
+  sort: z.string().optional(),
+  filter: z.string().optional(),
 });
 
 export type PageQueryParams = z.infer<typeof pageQueryParams>;
+
+export function getSortObject(
+  params: PageQueryParams,
+  validFields: Array<string>
+) {
+  const sortObj: Record<string, 1 | -1> = {};
+
+  if (params.sort && params.sort != "") {
+    const sortOptions = params.sort.split(",");
+    sortOptions.forEach((item) => {
+      const order = item.startsWith("-") ? -1 : 1;
+      const field = item.replace("-", "").trim();
+
+      if (validFields.includes(field)) sortObj[field] = order;
+    });
+  }
+
+  if (Object.keys(sortObj).length == 0) sortObj["createdAt"] = -1;
+
+  return sortObj;
+}