<?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_Reflection

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

 * @version    $Id: File.php 20904 2010-02-04 16:18:18Z matthew $

 */

/**

 * @see Zend_Reflection_Class

 */

require_once 'Zend/Reflection/Class.php';

/**

 * @see Zend_Reflection_Function

 */

require_once 'Zend/Reflection/Function.php';

/**

 * @category   Zend

 * @package    Zend_Reflection

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

 */

class Zend_Reflection_File implements Reflector

{

    /**

     * @var string

     */

    protected $_filepath        = null;

    /**

     * @var string

     */

    protected $_docComment      = null;

    /**

     * @var int

     */

    protected $_startLine       = 1;

    /**

     * @var int

     */

    protected $_endLine         = null;

    /**

     * @var string[]

     */

    protected $_requiredFiles   = array();

    /**

     * @var Zend_Reflection_Class[]

     */

    protected $_classes         = array();

    /**

     * @var Zend_Reflection_Function[]

     */

    protected $_functions       = array();

    /**

     * @var string

     */

    protected $_contents        = null;

    /**

     * Constructor

     *

     * @param  string $file

     * @return void

     */

    public function __construct($file)

    {

        $fileName = $file;

        if (($fileRealpath = realpath($fileName)) === false) {

            $fileRealpath = self::findRealpathInIncludePath($file);

        }

        if (!$fileRealpath || !in_array($fileRealpath, get_included_files())) {

            require_once 'Zend/Reflection/Exception.php';

            throw new Zend_Reflection_Exception('File ' . $file . ' must be required before it can be reflected');

        }

        $this->_fileName = $fileRealpath;

        $this->_contents = file_get_contents($this->_fileName);

        $this->_reflect();

    }

    /**

     * Find realpath of file based on include_path

     *

     * @param  string $fileName

     * @return string

     */

    public static function findRealpathInIncludePath($fileName)

    {

        require_once 'Zend/Loader.php';

        $includePaths = Zend_Loader::explodeIncludePath();

        while (count($includePaths) > 0) {

            $filePath = array_shift($includePaths) . DIRECTORY_SEPARATOR . $fileName;

            if ( ($foundRealpath = realpath($filePath)) !== false) {

                break;

            }

        }

        return $foundRealpath;

    }

    /**

     * Export

     *

     * Required by the Reflector interface.

     *

     * @todo   What should this do?

     * @return null

     */

    public static function export()

    {

        return null;

    }

    /**

     * Return the file name of the reflected file

     *

     * @return string

     */

    public function getFileName()

    {

        return $this->_fileName;

    }

    /**

     * Get the start line - Always 1, staying consistent with the Reflection API

     *

     * @return int

     */

    public function getStartLine()

    {

        return $this->_startLine;

    }

    /**

     * Get the end line / number of lines

     *

     * @return int

     */

    public function getEndLine()

    {

        return $this->_endLine;

    }

    /**

     * Return the doc comment

     *

     * @return string

     */

    public function getDocComment()

    {

        return $this->_docComment;

    }

    /**

     * Return the docblock

     *

     * @param  string $reflectionClass Reflection class to use

     * @return Zend_Reflection_Docblock

     */

    public function getDocblock($reflectionClass = 'Zend_Reflection_Docblock')

    {

        $instance = new $reflectionClass($this);

        if (!$instance instanceof Zend_Reflection_Docblock) {

            require_once 'Zend/Reflection/Exception.php';

            throw new Zend_Reflection_Exception('Invalid reflection class specified; must extend Zend_Reflection_Docblock');

        }

        return $instance;

    }

    /**

     * Return the reflection classes of the classes found inside this file

     *

     * @param  string $reflectionClass Name of reflection class to use for instances

     * @return array Array of Zend_Reflection_Class instances

     */

    public function getClasses($reflectionClass = 'Zend_Reflection_Class')

    {

        $classes = array();

        foreach ($this->_classes as $class) {

            $instance = new $reflectionClass($class);

            if (!$instance instanceof Zend_Reflection_Class) {

                require_once 'Zend/Reflection/Exception.php';

                throw new Zend_Reflection_Exception('Invalid reflection class provided; must extend Zend_Reflection_Class');

            }

            $classes[] = $instance;

        }

        return $classes;

    }

    /**

     * Return the reflection functions of the functions found inside this file

     *

     * @param  string $reflectionClass Name of reflection class to use for instances

     * @return array Array of Zend_Reflection_Functions

     */

    public function getFunctions($reflectionClass = 'Zend_Reflection_Function')

    {

        $functions = array();

        foreach ($this->_functions as $function) {

            $instance = new $reflectionClass($function);

            if (!$instance instanceof Zend_Reflection_Function) {

                require_once 'Zend/Reflection/Exception.php';

                throw new Zend_Reflection_Exception('Invalid reflection class provided; must extend Zend_Reflection_Function');

            }

            $functions[] = $instance;

        }

        return $functions;

    }

    /**

     * Retrieve the reflection class of a given class found in this file

     *

     * @param  null|string $name

     * @param  string $reflectionClass Reflection class to use when creating reflection instance

     * @return Zend_Reflection_Class

     * @throws Zend_Reflection_Exception for invalid class name or invalid reflection class

     */

    public function getClass($name = null, $reflectionClass = 'Zend_Reflection_Class')

    {

        if ($name === null) {

            reset($this->_classes);

            $selected = current($this->_classes);

            $instance = new $reflectionClass($selected);

            if (!$instance instanceof Zend_Reflection_Class) {

                require_once 'Zend/Reflection/Exception.php';

                throw new Zend_Reflection_Exception('Invalid reflection class given; must extend Zend_Reflection_Class');

            }

            return $instance;

        }

        if (in_array($name, $this->_classes)) {

            $instance = new $reflectionClass($name);

            if (!$instance instanceof Zend_Reflection_Class) {

                require_once 'Zend/Reflection/Exception.php';

                throw new Zend_Reflection_Exception('Invalid reflection class given; must extend Zend_Reflection_Class');

            }

            return $instance;

        }

        require_once 'Zend/Reflection/Exception.php';

        throw new Zend_Reflection_Exception('Class by name ' . $name . ' not found.');

    }

    /**

     * Return the full contents of file

     *

     * @return string

     */

    public function getContents()

    {

        return $this->_contents;

    }

    /**

     * Serialize to string

     *

     * Required by the Reflector interface

     *

     * @todo   What should this serialization look like?

     * @return string

     */

    public function __toString()

    {

        return '';

    }

    /**

     * This method does the work of "reflecting" the file

     *

     * Uses PHP's tokenizer to perform file reflection.

     *

     * @return void

     */

    protected function _reflect()

    {

        $contents = $this->_contents;

        $tokens   = token_get_all($contents);

        $functionTrapped = false;

        $classTrapped    = false;

        $requireTrapped  = false;

        $openBraces      = 0;

        $this->_checkFileDocBlock($tokens);

        foreach ($tokens as $token) {

            /*

             * Tokens are characters representing symbols or arrays

             * representing strings. The keys/values in the arrays are

             *

             * - 0 => token id,

             * - 1 => string,

             * - 2 => line number

             *

             * Token ID's are explained here:

             * http://www.php.net/manual/en/tokens.php.

             */

            if (is_array($token)) {

                $type    = $token[0];

                $value   = $token[1];

                $lineNum = $token[2];

            } else {

                // It's a symbol

                // Maintain the count of open braces

                if ($token == '{') {

                    $openBraces++;

                } else if ($token == '}') {

                    $openBraces--;

                }

                continue;

            }

            switch ($type) {

                // Name of something

                case T_STRING:

                    if ($functionTrapped) {

                        $this->_functions[] = $value;

                        $functionTrapped = false;

                    } elseif ($classTrapped) {

                        $this->_classes[] = $value;

                        $classTrapped = false;

                    }

                    continue;

                // Required file names are T_CONSTANT_ENCAPSED_STRING

                case T_CONSTANT_ENCAPSED_STRING:

                    if ($requireTrapped) {

                        $this->_requiredFiles[] = $value ."\n";

                        $requireTrapped = false;

                    }

                    continue;

                // Functions

                case T_FUNCTION:

                    if ($openBraces == 0) {

                        $functionTrapped = true;

                    }

                    break;

                // Classes

                case T_CLASS:

                case T_INTERFACE:

                    $classTrapped = true;

                    break;

                // All types of requires

                case T_REQUIRE:

                case T_REQUIRE_ONCE:

                case T_INCLUDE:

                case T_INCLUDE_ONCE:

                    $requireTrapped = true;

                    break;

                // Default case: do nothing

                default:

                    break;

            }

        }

        $this->_endLine = count(explode("\n", $this->_contents));

    }

    /**

     * Validate / check a file level docblock

     *

     * @param  array $tokens Array of tokenizer tokens

     * @return void

     */

    protected function _checkFileDocBlock($tokens) {

        foreach ($tokens as $token) {

            $type    = $token[0];

            $value   = $token[1];

            $lineNum = $token[2];

            if(($type == T_OPEN_TAG) || ($type == T_WHITESPACE)) {

                continue;

            } elseif ($type == T_DOC_COMMENT) {

                $this->_docComment = $value;

                $this->_startLine  = $lineNum + substr_count($value, "\n") + 1;

                return;

            } else {

                // Only whitespace is allowed before file docblocks

                return;

            }

        }

    }

}