Request.php

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<?php
class Zend_Json_Server_Request
{
    protected $_id;

    protected $_isMethodError = false;

    protected $_method;

    protected $_methodRegex = '/^[a-z][a-z0-9_.]*$/i';

    protected $_params = array();

    protected $_version = '1.0';

    public function setOptions(array $options)
    {
        $methods = get_class_methods($this);
        foreach ($options as $key => $value) {
            $method = 'set' . ucfirst($key);
            if (in_array($method, $methods)) {
                $this->$method($value);
            } elseif ($key == 'jsonrpc') {
                $this->setVersion($value);
            }
        }
        return $this;
    }

    public function addParam($value, $key = null)
    {
        if ((null === $key) || !is_string($key)) {
            $index = count($this->_params);
            $this->_params[$index] = $value;
        } else {
            $this->_params[$key] = $value;
        }

        return $this;
    }

    public function addParams(array $params)
    {
        foreach ($params as $key => $value) {
            $this->addParam($value, $key);
        }
        return $this;
    }

    public function setParams(array $params)
    {
        $this->_params = array();
        return $this->addParams($params);
    }

    public function getParam($index)
    {
        if (array_key_exists($index, $this->_params)) {
            return $this->_params[$index];
        }

        return null;
    }

    public function getParams()
    {
        return $this->_params;
    }

    public function setMethod($name)
    {
        if (!preg_match($this->_methodRegex, $name)) {
            $this->_isMethodError = true;
        } else {
            $this->_method = $name;
        }
        return $this;
    }

    public function getMethod()
    {
        return $this->_method;
    }

    public function isMethodError()
    {
        return $this->_isMethodError;
    }

    public function setId($name)
    {
        $this->_id = (string) $name;
        return $this;
    }

    public function getId()
    {
        return $this->_id;
    }

    public function setVersion($version)
    {
        if ('2.0' == $version) {
            $this->_version = '2.0';
        } else {
            $this->_version = '1.0';
        }
        return $this;
    }

    public function getVersion()
    {
        return $this->_version;
    }

    public function loadJson($json)
    {
        #require_once 'Zend/Json.php';
        $options = Zend_Json::decode($json);
        $this->setOptions($options);
    }

    public function toJson()
    {
        $jsonArray = array(
            'method' => $this->getMethod()
        );
        if (null !== ($id = $this->getId())) {
            $jsonArray['id'] = $id;
        }
        $params = $this->getParams();
        if (!empty($params)) {
            $jsonArray['params'] = $params;
        }
        if ('2.0' == $this->getVersion()) {
            $jsonArray['jsonrpc'] = '2.0';
        }

        #require_once 'Zend/Json.php';
        return Zend_Json::encode($jsonArray);
    }

    public function __toString()
    {
        return $this->toJson();
    }
}