/**
 * Checks the shape of the category request bodies, for the category routes to
 * answer a 400. The category service checks the slug and name themselves.
 *
 * @module
 */

import type {
  CreateCategoryRequest,
  UpdateCategoryRequest,
} from "../../shared/category.ts";

/** Checks whether `obj` has the fields of a {@link CreateCategoryRequest}. */
export function isCreateCategoryRequest(
  obj: unknown,
): obj is CreateCategoryRequest {
  if (!obj || typeof obj !== "object") return false;
  const o = obj as Record<string, unknown>;
  if (typeof o.slug !== "string") return false;
  if (typeof o.name !== "string") return false;
  if ("position" in o && typeof o.position !== "number") return false;
  return true;
}

/** Checks whether `obj` has the fields of an {@link UpdateCategoryRequest}. */
export function isUpdateCategoryRequest(
  obj: unknown,
): obj is UpdateCategoryRequest {
  if (!obj || typeof obj !== "object") return false;
  const o = obj as Record<string, unknown>;
  if ("slug" in o && typeof o.slug !== "string") return false;
  if ("name" in o && typeof o.name !== "string") return false;
  if ("position" in o && typeof o.position !== "number") return false;
  return true;
}