1<?php
2/**
3 * Zend Framework (http://framework.zend.com/)
4 *
5 * @link      http://github.com/zendframework/zf2 for the canonical source repository
6 * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
7 * @license   http://framework.zend.com/license/new-bsd New BSD License
8 */
9
10namespace Zend\View\Model;
11
12use Traversable;
13use Zend\Json\Json;
14use Zend\Stdlib\ArrayUtils;
15
16class JsonModel extends ViewModel
17{
18    /**
19     * JSON probably won't need to be captured into a
20     * a parent container by default.
21     *
22     * @var string
23     */
24    protected $captureTo = null;
25
26    /**
27     * JSONP callback (if set, wraps the return in a function call)
28     *
29     * @var string
30     */
31    protected $jsonpCallback = null;
32
33    /**
34     * JSON is usually terminal
35     *
36     * @var bool
37     */
38    protected $terminate = true;
39
40    /**
41     * Set the JSONP callback function name
42     *
43     * @param  string $callback
44     * @return JsonModel
45     */
46    public function setJsonpCallback($callback)
47    {
48        $this->jsonpCallback = $callback;
49        return $this;
50    }
51
52    /**
53     * Serialize to JSON
54     *
55     * @return string
56     */
57    public function serialize()
58    {
59        $variables = $this->getVariables();
60        if ($variables instanceof Traversable) {
61            $variables = ArrayUtils::iteratorToArray($variables);
62        }
63
64        $options = array(
65            'prettyPrint' => $this->getOption('prettyPrint'),
66        );
67
68        if (null !== $this->jsonpCallback) {
69            return $this->jsonpCallback.'('.Json::encode($variables, false, $options).');';
70        }
71        return Json::encode($variables, false, $options);
72    }
73}
74