<?php
/*
 *  $Id: CvsPassTask.php 2004 2004-08-16 08:04:56Z chregu $
 *
 * 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.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information please see
 * <http://phing.info>.
 */
 
require_once 'phing/Task.php';
include_once 'phing/system/io/BufferedReader.php';
include_once 'phing/system/io/BufferedWriter.php';
include_once 'phing/util/StringHelper.php';

/**
 * Adds an new entry to a CVS password file.
 *
 * @author Hans Lellelid <hans@xmpl.org> (Phing)
 * @author Jeff Martin <jeff@custommonkey.org> (Ant)
 * @version $Revision: 1.6 $
 * @package phing.tasks.system
 */
class CVSPassTask extends Task {

    /** CVS Root */
    private $cvsRoot; 
    /** Password file to add password to */
    private $passFile;
    /** Password to add to file */
    private $password;

    /** Array contain char conversion data */
    private static $shifts = array(
          0,   1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11,  12,  13,  14,  15,
         16,  17,  18,  19,  20,  21,  22,  23,  24,  25,  26,  27,  28,  29,  30,  31,
        114, 120,  53,  79,  96, 109,  72, 108,  70,  64,  76,  67, 116,  74,  68,  87,
        111,  52,  75, 119,  49,  34,  82,  81,  95,  65, 112,  86, 118, 110, 122, 105,
         41,  57,  83,  43,  46, 102,  40,  89,  38, 103,  45,  50,  42, 123,  91,  35,
        125,  55,  54,  66, 124, 126,  59,  47,  92,  71, 115,  78,  88, 107, 106,  56,
         36, 121, 117, 104, 101, 100,  69,  73,  99,  63,  94,  93,  39,  37,  61,  48,
         58, 113,  32,  90,  44,  98,  60,  51,  33,  97,  62,  77,  84,  80,  85, 223,
        225, 216, 187, 166, 229, 189, 222, 188, 141, 249, 148, 200, 184, 136, 248, 190,
        199, 170, 181, 204, 138, 232, 218, 183, 255, 234, 220, 247, 213, 203, 226, 193,
        174, 172, 228, 252, 217, 201, 131, 230, 197, 211, 145, 238, 161, 179, 160, 212,
        207, 221, 254, 173, 202, 146, 224, 151, 140, 196, 205, 130, 135, 133, 143, 246,
        192, 159, 244, 239, 185, 168, 215, 144, 139, 165, 180, 157, 147, 186, 214, 176,
        227, 231, 219, 169, 175, 156, 206, 198, 129, 164, 150, 210, 154, 177, 134, 127,
        182, 128, 158, 208, 162, 132, 167, 209, 149, 241, 153, 251, 237, 236, 171, 195,
        243, 233, 253, 240, 194, 250, 191, 155, 142, 137, 245, 235, 163, 242, 178, 152 
    );

    /**
     * Create a CVS task using the default cvspass file location.
     */
    public function __construct() {
        $this->passFile = new File(
            Phing::getProperty("cygwin.user.home",
                Phing::getProperty("user.home"))
            . DIRECTORY_SEPARATOR . ".cvspass");
    }

    /**
     * Does the work.
     *
     * @throws BuildException if someting goes wrong with the build
     */
    public final function main() {
        if ($this->cvsRoot === null) {
            throw new BuildException("cvsroot is required");
        }
        if ($this->password === null) {
            throw new BuildException("password is required");
        }

        $this->log("cvsRoot: " . $this->cvsRoot, PROJECT_MSG_DEBUG);
        $this->log("password: " . $this->password, PROJECT_MSG_DEBUG);
        $this->log("passFile: " . $this->passFile->__toString(), PROJECT_MSG_DEBUG);

        $reader = null;
        $writer = null;
        
        try {
            $buf = "";

            if ($this->passFile->exists()) {
                $reader = new BufferedReader(new FileReader($this->passFile));
                
                $line = null;
                while (($line = $reader->readLine()) !== null) {
                    if (!StringHelper::startsWith($this->cvsRoot, $line)) {
                        $buf .= $line . Phing::getProperty("line.separator");
                    }
                }
            }

            $pwdfile = $buf . $this->cvsRoot . " A" . $this->mangle($this->password);

            $this->log("Writing -> " . $pwdfile , PROJECT_MSG_DEBUG);

            $writer = new BufferedWriter(new FileWriter($this->passFile));
            $writer->write($pwdfile);
            $writer->newLine();
            
            $writer->close();
            if ($reader) {
                $reader->close();
            }
                        
        } catch (IOException $e) {
            if ($reader) {
                try {
                    $reader->close();
                } catch (Exception $e) {}                
            }
            
            if ($writer) {
                try {
                    $writer->close();
                } catch (Exception $e) {}                
            }
            
            throw new BuildException($e);
        }
    }
    
    /**
     * "Encode" the password.
     */
    private final function mangle($password){
        $buf = "";
        for ($i = 0, $plen = strlen($password); $i < $plen; $i++) {
            $buf .= chr(self::$shifts[ord($password{$i})]);
        }
        return $buf;
    }

    /**
     * The CVS repository to add an entry for.
     * @param string $cvsRoot
     */
    public function setCvsroot($cvsRoot) {
        $this->cvsRoot = $cvsRoot;
    }

    /**
     * Password file to add the entry to.
     * @param File $passFile
     */
    public function setPassfile(File $passFile) {
        $this->passFile = $passFile;
    }

    /**
     * Password to be added to the password file.
     * @param string $password
     */
    public function setPassword($password) {
        $this->password = $password;
    }

}
