<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Test

 * @subpackage PHPUnit

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

/** @see PHPUnit_Framework_Constraint */

require_once 'PHPUnit/Framework/Constraint.php';

/**

 * Response header PHPUnit Constraint

 *

 * @uses       PHPUnit_Framework_Constraint

 * @category   Zend

 * @package    Zend_Test

 * @subpackage PHPUnit

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Test_PHPUnit_Constraint_ResponseHeader extends PHPUnit_Framework_Constraint

{

    /**#@+

     * Assertion type constants

     */

    const ASSERT_RESPONSE_CODE   = 'assertResponseCode';

    const ASSERT_HEADER          = 'assertHeader';

    const ASSERT_HEADER_CONTAINS = 'assertHeaderContains';

    const ASSERT_HEADER_REGEX    = 'assertHeaderRegex';

    /**#@-*/

    /**

     * Current assertion type

     * @var string

     */

    protected $_assertType      = null;

    /**

     * Available assertion types

     * @var array

     */

    protected $_assertTypes     = array(

        self::ASSERT_RESPONSE_CODE,

        self::ASSERT_HEADER,

        self::ASSERT_HEADER_CONTAINS,

        self::ASSERT_HEADER_REGEX,

    );

    /**

     * @var int Response code

     */

    protected $_code              = 200;

    /**

     * @var string Header

     */

    protected $_header            = null;

    /**

     * @var string pattern against which to compare header content

     */

    protected $_match             = null;

    /**

     * Whether or not assertion is negated

     * @var bool

     */

    protected $_negate            = false;

    /**

     * Constructor; setup constraint state

     *

     * @return void

     */

    public function __construct()

    {

    }

    /**

     * Indicate negative match

     *

     * @param  bool $flag

     * @return void

     */

    public function setNegate($flag = true)

    {

        $this->_negate = $flag;

    }

    /**

     * Evaluate an object to see if it fits the constraints

     *

     * @param  Zend_Controller_Response_Abstract $other String to examine

     * @param  null|string Assertion type

     * @return bool

     */

    public function evaluate($other, $assertType = null)

    {

        if (!$other instanceof Zend_Controller_Response_Abstract) {

            require_once 'Zend/Test/PHPUnit/Constraint/Exception.php';

            throw new Zend_Test_PHPUnit_Constraint_Exception('Header constraint assertions require a response object');

        }

        if (strstr($assertType, 'Not')) {

            $this->setNegate(true);

            $assertType = str_replace('Not', '', $assertType);

        }

        if (!in_array($assertType, $this->_assertTypes)) {

            require_once 'Zend/Test/PHPUnit/Constraint/Exception.php';

            throw new Zend_Test_PHPUnit_Constraint_Exception(sprintf('Invalid assertion type "%s" provided to %s constraint', $assertType, __CLASS__));

        }

        $this->_assertType = $assertType;

        $response = $other;

        $argv     = func_get_args();

        $argc     = func_num_args();

        switch ($assertType) {

            case self::ASSERT_RESPONSE_CODE:

                if (3 > $argc) {

                    require_once 'Zend/Test/PHPUnit/Constraint/Exception.php';

                    throw new Zend_Test_PHPUnit_Constraint_Exception('No response code provided against which to match');

                }

                $this->_code = $code = $argv[2];

                return ($this->_negate)

                    ? $this->_notCode($response, $code)

                    : $this->_code($response, $code);

            case self::ASSERT_HEADER:

                if (3 > $argc) {

                    require_once 'Zend/Test/PHPUnit/Constraint/Exception.php';

                    throw new Zend_Test_PHPUnit_Constraint_Exception('No header provided against which to match');

                }

                $this->_header = $header = $argv[2];

                return ($this->_negate)

                    ? $this->_notHeader($response, $header)

                    : $this->_header($response, $header);

            case self::ASSERT_HEADER_CONTAINS:

                if (4 > $argc) {

                    require_once 'Zend/Test/PHPUnit/Constraint/Exception.php';

                    throw new Zend_Test_PHPUnit_Constraint_Exception('Both a header name and content to match are required for ' . __FUNCTION__);

                }

                $this->_header = $header = $argv[2];

                $this->_match  = $match  = $argv[3];

                return ($this->_negate)

                    ? $this->_notHeaderContains($response, $header, $match)

                    : $this->_headerContains($response, $header, $match);

            case self::ASSERT_HEADER_REGEX:

                if (4 > $argc) {

                    require_once 'Zend/Test/PHPUnit/Constraint/Exception.php';

                    throw new Zend_Test_PHPUnit_Constraint_Exception('Both a header name and content to match are required for ' . __FUNCTION__);

                }

                $this->_header = $header = $argv[2];

                $this->_match  = $match  = $argv[3];

                return ($this->_negate)

                    ? $this->_notHeaderRegex($response, $header, $match)

                    : $this->_headerRegex($response, $header, $match);

            default:

                require_once 'Zend/Test/PHPUnit/Constraint/Exception.php';

                throw new Zend_Test_PHPUnit_Constraint_Exception('Invalid assertion type ' . __FUNCTION__);

        }

    }

    /**

     * Report Failure

     *

     * @see    PHPUnit_Framework_Constraint for implementation details

     * @param  mixed $other

     * @param  string $description Additional message to display

     * @param  bool $not

     * @return void

     * @throws PHPUnit_Framework_ExpectationFailedException

     */

    public function fail($other, $description, $not = false)

    {

        require_once 'Zend/Test/PHPUnit/Constraint/Exception.php';

        switch ($this->_assertType) {

            case self::ASSERT_RESPONSE_CODE:

                $failure = 'Failed asserting response code "%s"';

                if ($this->_negate) {

                    $failure = 'Failed asserting response code IS NOT "%s"';

                }

                $failure = sprintf($failure, $this->_code);

                break;

            case self::ASSERT_HEADER:

                $failure = 'Failed asserting response header "%s" found';

                if ($this->_negate) {

                    $failure = 'Failed asserting response response header "%s" WAS NOT found';

                }

                $failure = sprintf($failure, $this->_header);

                break;

            case self::ASSERT_HEADER_CONTAINS:

                $failure = 'Failed asserting response header "%s" exists and contains "%s"';

                if ($this->_negate) {

                    $failure = 'Failed asserting response header "%s" DOES NOT CONTAIN "%s"';

                }

                $failure = sprintf($failure, $this->_header, $this->_match);

                break;

            case self::ASSERT_HEADER_REGEX:

                $failure = 'Failed asserting response header "%s" exists and matches regex "%s"';

                if ($this->_negate) {

                    $failure = 'Failed asserting response header "%s" DOES NOT MATCH regex "%s"';

                }

                $failure = sprintf($failure, $this->_header, $this->_match);

                break;

            default:

                throw new Zend_Test_PHPUnit_Constraint_Exception('Invalid assertion type ' . __FUNCTION__);

        }

        if (!empty($description)) {

            $failure = $description . "\n" . $failure;

        }

        throw new Zend_Test_PHPUnit_Constraint_Exception($failure);

    }

    /**

     * Complete implementation

     *

     * @return string

     */

    public function toString()

    {

        return '';

    }

    /**

     * Compare response code for positive match

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  int $code

     * @return bool

     */

    protected function _code(Zend_Controller_Response_Abstract $response, $code)

    {

        $test = $this->_getCode($response);

        return ($test == $code);

    }

    /**

     * Compare response code for negative match

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  int $code

     * @return bool

     */

    protected function _notCode(Zend_Controller_Response_Abstract $response, $code)

    {

        $test = $this->_getCode($response);

        return ($test != $code);

    }

    /**

     * Retrieve response code

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @return int

     */

    protected function _getCode(Zend_Controller_Response_Abstract $response)

    {

        $test = $response->getHttpResponseCode();

        if (null === $test) {

            $test = 200;

        }

        return $test;

    }

    /**

     * Positive check for response header presence

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  string $header

     * @return bool

     */

    protected function _header(Zend_Controller_Response_Abstract $response, $header)

    {

        return (null !== $this->_getHeader($response, $header));

    }

    /**

     * Negative check for response header presence

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  string $header

     * @return bool

     */

    protected function _notHeader(Zend_Controller_Response_Abstract $response, $header)

    {

        return (null === $this->_getHeader($response, $header));

    }

    /**

     * Retrieve response header

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  string $header

     * @return string|null

     */

    protected function _getHeader(Zend_Controller_Response_Abstract $response, $header)

    {

        $headers = $response->sendHeaders();

        $header  = strtolower($header);

        if (array_key_exists($header, $headers)) {

            return $headers[$header];

        }

        return null;

    }

    /**

     * Positive check for header contents matching pattern

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  string $header

     * @param  string $match

     * @return bool

     */

    protected function _headerContains(Zend_Controller_Response_Abstract $response, $header, $match)

    {

        if (null === ($fullHeader = $this->_getHeader($response, $header))) {

            return false;

        }

        $contents = str_replace($header . ': ', '', $fullHeader);

    }

    /**

     * Negative check for header contents matching pattern

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  string $header

     * @param  string $match

     * @return bool

     */

    protected function _notHeaderContains(Zend_Controller_Response_Abstract $response, $header, $match)

    {

        if (null === ($fullHeader = $this->_getHeader($response, $header))) {

            return true;

        }

        $contents = str_replace($header . ': ', '', $fullHeader);

    }

    /**

     * Positive check for header contents matching regex

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  string $header

     * @param  string $pattern

     * @return bool

     */

    protected function _headerRegex(Zend_Controller_Response_Abstract $response, $header, $pattern)

    {

        if (null === ($fullHeader = $this->_getHeader($response, $header))) {

            return false;

        }

        $contents = str_replace($header . ': ', '', $fullHeader);

        return preg_match($pattern, $contents);

    }

    /**

     * Negative check for header contents matching regex

     *

     * @param  Zend_Controller_Response_Abstract $response

     * @param  string $header

     * @param  string $pattern

     * @return bool

     */

    protected function _notHeaderRegex(Zend_Controller_Response_Abstract $response, $header, $pattern)

    {

        if (null === ($fullHeader = $this->_getHeader($response, $header))) {

            return true;

        }

        $contents = str_replace($header . ': ', '', $fullHeader);

        return !preg_match($pattern, $contents);

    }

}