[zod-openapi] validate nested query

[prpanto]

What is the feature you are proposing?

I have a nested query like ?filter[color]=red&filter[size]=large&user[post][id]=385&sort=-createdAt&include=author,comments&active=true and I want to validate. In zod-validator I use qs lib to make the query like an object and after that i parse with zod. In zod-openapi I love to get query to make the same. See my example above.

const route = createRoute({
  ...
  request: {
    query: (query) => {
      // query example: "?filter[color]=red&filter[size]=large&user[post][id]=385&sort=-createdAt&include=author,comments&active=true"
      
      const queryObject = qs.parse(query, {
        ignoreQueryPrefix: true,
        decoder: (str: string, defaultDecoder: qs.defaultDecoder, charset: string, type: "key" | "value") => {    
          if (type === "value" && !!Number(str)) {
            return Number(str);
          }

          if (type === "value" && str === "true") {
            return true;
          }
          
          if (type === "value" && str === "false") {
            return false;
          }

          if (type === "value" && str.includes(",")) {
            return str.split(",").map((s: string) => s.trim());
          }

          return defaultDecoder(str);
        }
      });

      const schema = z.object({
        filter: z.object({
          color: z.string().optional(),
          size: z.string().optional(),
        }).optional(),
        user: z.object({
          post: z.object({
            id: z.int().optional(),
          }).optional(),
        }).optional(),
        sort: z.string().optional(),
        include: z.array(z.string()).optional(),
        active: z.boolean().optional(),
      });

      return schema.parse(queryObject);
    },
  },
  ...
});