safekat/ci4/app/Controllers/API/ImprimelibrosApi.php

<?php

namespace App\Controllers\API;

use App\Controllers\Presupuestos\Presupuestocliente;
use CodeIgniter\RESTful\ResourceController;
use CodeIgniter\API\ResponseTrait;
use App\Models\API\ItemModel;

class ImprimelibrosApi extends ResourceController
{

    use ResponseTrait;

    public function index()
    {
        $model = new ItemModel();
        $data = $model->findAll();
        return $this->respond($data);
    }



    public function calcular()
    {
        helper(['form']);

        // Access the entire POST data
        $post_data = $this->request->getJSON(true);

        //return $this->respond(var_dump($post_data));

        // Instancia de presupuesto cliente
        $presupuestocliente = new Presupuestocliente();
        $response = $presupuestocliente->calcular($post_data);

        $response = [
            'status' => 200,
            'error' => null,
            'data' => [
                'tiradas' => $response['tiradas'],
                'precios' => $response['precio_u']
            ]
        ];
        return $this->respond($response);
    }

    public function delete($id = null)
    {
        $model = new ItemModel();
        $find = $model->find(['id' => $id]);
        if (!$find)
            return $this->failNotFound('No Data Found');
        $model->delete($id);

        $response = [
            'status' => 200,
            'error' => null,
            'messages' => [
                'success' => 'Data deleted'
            ]
        ];
        return $this->respond($response);
    }
}