1 files changed, 30 insertions, 0 deletions
diff --git a/packages/api/utils/pagination.ts b/packages/api/utils/pagination.ts
new file mode 100644
index 00000000..12a0b950
--- /dev/null
+++ b/packages/api/utils/pagination.ts
@@ -0,0 +1,30 @@
+import { z } from "zod";
+
+import { MAX_NUM_BOOKMARKS_PER_PAGE } from "@karakeep/shared/types/bookmarks";
+import { zCursorV2 } from "@karakeep/shared/types/pagination";
+
+export const zPagination = z.object({
+  limit: z.coerce.number().max(MAX_NUM_BOOKMARKS_PER_PAGE).optional(),
+  cursor: z
+    .string()
+    .refine((val) => val.includes("_"), "Must be a valid cursor")
+    .transform((val) => {
+      const [id, createdAt] = val.split("_");
+      return { id, createdAt };
+    })
+    .pipe(z.object({ id: z.string(), createdAt: z.coerce.date() }))
+    .optional(),
+});
+
+export function adaptPagination<
+  T extends { nextCursor: z.infer<typeof zCursorV2> | null },
+>(input: T) {
+  const { nextCursor, ...rest } = input;
+  if (!nextCursor) {
+    return input;
+  }
+  return {
+    ...rest,
+    nextCursor: `${nextCursor.id}_${nextCursor.createdAt.toISOString()}`,
+  };
+}