<?php
/**
 * PHPUnit
 *
 * Copyright (c) 2002-2010, Sebastian Bergmann <sb@sebastian-bergmann.de>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 *   * Neither the name of Sebastian Bergmann nor the names of his
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @category   Testing
 * @package    PHPUnit
 * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @copyright  2002-2010 Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @link       http://www.phpunit.de/
 * @since      File available since Release 3.2.0
 */

require_once 'PHPUnit/Util/Filter.php';
require_once 'PHPUnit/Util/Metrics.php';

PHPUnit_Util_Filter::addFileToFilter(__FILE__, 'PHPUNIT');

/**
 * Project-Level Metrics.
 *
 * @category   Testing
 * @package    PHPUnit
 * @author     Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @copyright  2002-2010 Sebastian Bergmann <sb@sebastian-bergmann.de>
 * @license    http://www.opensource.org/licenses/bsd-license.php  BSD License
 * @version    Release: 3.4.9
 * @link       http://www.phpunit.de/
 * @since      Class available since Release 3.2.0
 */
class PHPUnit_Util_Metrics_Project extends PHPUnit_Util_Metrics
{
    protected static $CPD_IGNORE_LIST = array(
      T_INLINE_HTML,
      T_COMMENT,
      T_DOC_COMMENT,
      T_OPEN_TAG,
      T_OPEN_TAG_WITH_ECHO,
      T_CLOSE_TAG,
      T_WHITESPACE
    );

    protected $classes   = array();
    protected $files     = array();
    protected $functions = array();

    protected $cls     = 0;
    protected $clsa    = 0;
    protected $clsc    = 0;
    protected $interfs = 0;
    protected $roots   = 0;
    protected $leafs   = 0;
    protected $maxDit  = 0;

    protected $cpdDuplicates = array();
    protected $cpdHashes     = array();
    protected $dependencies  = array();

    /**
     * Constructor.
     *
     * @param  array   $files
     * @param  array   $codeCoverage
     * @param  boolean $cpd
     * @param  integer $cpdMinLines
     * @param  integer $cpdMinMatches
     */
    public function __construct(Array $files, &$codeCoverage = array(), $cpd = FALSE, $cpdMinLines = 5, $cpdMinMatches = 70)
    {
        foreach ($files as $file) {
            if (file_exists($file)) {
                $this->files[$file] = PHPUnit_Util_Metrics_File::factory(
                  $file, $codeCoverage
                );

                foreach ($this->files[$file]->getFunctions() as $function) {
                    $this->functions[$function->getFunction()->getName()] = $function;
                }

                foreach ($this->files[$file]->getClasses() as $class) {
                    $className = $class->getClass()->getName();
                    $package   = $class->getPackage();

                    $this->classes[$className] = $class;

                    if ($class->getClass()->isInterface()) {
                        $this->interfs++;
                    } else {
                        if ($class->getClass()->isAbstract()) {
                            $this->clsa++;
                        } else {
                            $this->clsc++;
                        }

                        $this->cls++;
                    }
                }
            }
        }

        $numClasses = count($this->classes);

        foreach ($this->classes as $a => $b) {
            foreach ($this->classes as $c => $d) {
                $this->dependencies[$a][$c] = 0;
            }
        }

        foreach ($this->classes as $className => $class) {
            foreach ($class->getDependencies() as $dependency) {
                $this->dependencies[$className][$dependency] = 1;
            }

            $class->setProject($this);

            if ($class->getNOC() == 0) {
                $this->leafs++;
            }

            else if ($class->getClass()->getParentClass() === FALSE) {
                $this->roots++;
            }

            $this->maxDit = max($this->maxDit, $class->getDit());
        }

        if ($cpd) {
            $this->copyPasteDetection($cpdMinLines, $cpdMinMatches);
        }
    }

    /**
     * Returns the classes of this project.
     *
     * @return array
     */
    public function getClasses()
    {
        return $this->classes;
    }

    /**
     * A class.
     *
     * @param  string $className
     * @return ReflectionClass
     */
    public function getClass($className)
    {
        return $this->classes[$className];
    }

    /**
     * Returns the dependencies between the classes of this project.
     *
     * @return array
     */
    public function getDependencies()
    {
        return $this->dependencies;
    }

    /**
     * Returns the dependencies between the classes of this project
     * as GraphViz/DOT markup.
     *
     * @return Image_GraphViz
     * @since  Method available since Release 3.2.2
     */
    public function getDependenciesAsDOT()
    {
        if (PHPUnit_Util_Filesystem::fileExistsInIncludePath('Image/GraphViz.php')) {
            require_once 'Image/GraphViz.php';
        } else {
            throw new RuntimeException('Image_GraphViz is not available.');
        }

        $graph = new Image_GraphViz(
          TRUE,
          array(
            'overlap'  => 'scale',
            'splines'  => 'true',
            'sep'      => '.1',
            'fontsize' => '8'
          )
        );

        foreach (array_keys($this->dependencies) as $className) {
            $graph->addNode($className);
        }

        foreach ($this->dependencies as $from => $dependencies) {
            foreach ($dependencies as $to => $flag) {
                if ($flag === 1) {
                    $graph->addEdge(array($from => $to));
                }
            }
        }

        return $graph;
    }

    /**
     * Returns the duplicates found by the Copy & Paste Detection (CPD).
     *
     * @return array
     */
    public function getDuplicates()
    {
        return $this->cpdDuplicates;
    }

    /**
     * Returns the files of this project.
     *
     * @return array
     */
    public function getFiles()
    {
        return $this->files;
    }

    /**
     * A file.
     *
     * @param  string $className
     * @return ReflectionClass
     */
    public function getFile($filename)
    {
        return $this->files[$filename];
    }

    /**
     * Functions.
     *
     * @return array
     */
    public function getFunctions()
    {
        return $this->functions;
    }

    /**
     * A function.
     *
     * @param  string $functionName
     * @return ReflectionClass
     */
    public function getFunction($functionName)
    {
        return $this->functions[$functionName];
    }

    /**
     * Returns the Number of Classes (CLS) for the project.
     *
     * @return integer
     * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
     */
    public function getCLS()
    {
        return $this->cls;
    }

    /**
     * Returns the Number of Abstract Classes (CLSa) for the project.
     *
     * @return integer
     * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
     */
    public function getCLSa()
    {
        return $this->clsa;
    }

    /**
     * Returns the Number of Concrete Classes (CLSc) for the project.
     *
     * @return integer
     * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
     */
    public function getCLSc()
    {
        return $this->clsc;
    }

    /**
     * Returns the Number of Root Classes (ROOTS) for the project.
     *
     * @return integer
     * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
     */
    public function getRoots()
    {
        return $this->roots;
    }

    /**
     * Returns the Number of Leaf Classes (LEAFS) for the project.
     *
     * @return integer
     * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
     */
    public function getLeafs()
    {
        return $this->leafs;
    }

    /**
     * Returns the Number of Interfaces (INTERFS) for the project.
     *
     * @return integer
     * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
     */
    public function getInterfs()
    {
        return $this->interfs;
    }

    /**
     * Returns the Maximum Depth of Intheritance Tree (maxDIT) for the project.
     *
     * @return integer
     * @see    http://www.aivosto.com/project/help/pm-oo-misc.html
     */
    public function getMaxDit()
    {
        return $this->maxDit;
    }

    /**
     * Copy & Paste Detection (CPD).
     *
     * @param  integer $minLines
     * @param  integer $minMatches
     * @author Johann-Peter Hartmann <johann-peter.hartmann@mayflower.de>
     */
    protected function copyPasteDetection($minLines, $minMatches)
    {
        foreach ($this->files as $file) {
            $currentTokenPositions = array();
            $currentSignature      = '';
            $tokens                = $file->getTokens();
            $tokenNr               = 0;
            $line                  = 1;

            foreach (array_keys($tokens) as $key) {
                $token = $tokens[$key];

                if (is_string($token)) {
                    $line += substr_count($token, "\n");
                } else {
                    if (!in_array($token[0], self::$CPD_IGNORE_LIST)) {
                        $currentTokenPositions[$tokenNr++] = $line;
                        $currentSignature .= chr($token[0] & 255) . pack('N*', crc32($token[1]));
                    }

                    $line += substr_count($token[1], "\n");
                }
            }

            $tokenNr   = 0;
            $firstLine = 0;
            $found     = FALSE;

            if (count($currentTokenPositions) > 0) {
                do {
                    $line = $currentTokenPositions[$tokenNr];

                    $hash = substr(
                      md5(
                        substr(
                          $currentSignature, $tokenNr * 5,
                          $minMatches * 5
                        ),
                        TRUE
                      ),
                      0,
                      8
                    );

                    if (isset($this->cpdHashes[$hash])) {
                        $found = TRUE;

                        if ($firstLine === 0) {
                            $firstLine  = $line;
                            $firstHash  = $hash;
                            $firstToken = $tokenNr;
                        }
                    } else {
                        if ($found) {
                            $fileA      = $this->cpdHashes[$firstHash][0];
                            $firstLineA = $this->cpdHashes[$firstHash][1];

                            if ($line + 1 - $firstLine > $minLines &&
                                ($fileA->getPath() != $file->getPath() ||
                                 $firstLineA       != $firstLine)) {
                                $this->cpdDuplicates[] = array(
                                  'fileA'      => $fileA,
                                  'firstLineA' => $firstLineA,
                                  'fileB'      => $file,
                                  'firstLineB' => $firstLine,
                                  'numLines'   => $line    + 1 - $firstLine,
                                  'numTokens'  => $tokenNr + 1 - $firstToken
                                );
                            }

                            $found     = FALSE;
                            $firstLine = 0;
                        }

                        $this->cpdHashes[$hash] = array($file, $line);
                    }

                    $tokenNr++;
                } while ($tokenNr <= (count($currentTokenPositions) -
                         $minMatches )+1);
            }

            if ($found) {
                $fileA      = $this->cpdHashes[$firstHash][0];
                $firstLineA = $this->cpdHashes[$firstHash][1];

                if ($line + 1 - $firstLine > $minLines &&
                    ($fileA->getPath() != $file->getPath() ||
                     $firstLineA       != $firstLine)) {
                    $this->cpdDuplicates[] = array(
                      'fileA'      => $fileA,
                      'firstLineA' => $firstLineA,
                      'fileB'      => $file,
                      'firstLineB' => $firstLine,
                      'numLines'   => $line    + 1 - $firstLine,
                      'numTokens'  => $tokenNr + 1 - $firstToken
                    );
                }

                $found = FALSE;
            }
        }
    }
}
?>
