<?php
/*
 *  $Id: SvnBaseTask.php 905 2010-10-05 16:28:03Z mrook $
 *
 * 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>.
 */
 
include_once 'phing/Task.php';

/**
 * Base class for Subversion tasks
 *
 * @author Michiel Rook <michiel.rook@gmail.com>
 * @author Andrew Eddie <andrew.eddie@jamboworks.com> 
 * @version $Id: SvnBaseTask.php 905 2010-10-05 16:28:03Z mrook $
 * @package phing.tasks.ext.svn
 * @see VersionControl_SVN
 * @since 2.2.0
 */
abstract class SvnBaseTask extends Task
{
    private $workingCopy = "";
    
    private $repositoryUrl = "";
    
    private $svnPath = "/usr/bin/svn";
    
    private $svn = NULL;
    
    private $mode = "";
    
    private $svnArgs = array();
    
    private $svnSwitches = array();

    private $toDir = "";

    /**
     * Initialize Task.
     * This method includes any necessary SVN libraries and triggers
     * appropriate error if they cannot be found.  This is not done in header
     * because we may want this class to be loaded w/o triggering an error.
     */
    function init() {
        include_once 'VersionControl/SVN.php';
        if (!class_exists('VersionControl_SVN')) {
            throw new Exception("The SVN tasks depend on PEAR VersionControl_SVN package being installed.");
        }
    }

    /**
     * Sets the path to the workingcopy
     */
    function setWorkingCopy($workingCopy)
    {
        $this->workingCopy = $workingCopy;
    }

    /**
     * Returns the path to the workingcopy
     */
    function getWorkingCopy()
    {
        return $this->workingCopy;
    }

    /**
     * Sets the path/URI to the repository
     */
    function setRepositoryUrl($repositoryUrl)
    {
        $this->repositoryUrl = $repositoryUrl;
    }

    /**
     * Returns the path/URI to the repository
     */
    function getRepositoryUrl()
    {
        return $this->repositoryUrl;
    }

    /**
     * Sets the path to the SVN executable
     */
    function setSvnPath($svnPath)
    {
        $this->svnPath = $svnPath;
    }

    /**
     * Returns the path to the SVN executable
     */
    function getSvnPath()
    {
        return $this->svnPath;
    }

    //
    // Args
    //

    /**
     * Sets the path to export/checkout to
     */
    function setToDir($toDir)
    {
        $this->toDir = $toDir;
    }

    /**
     * Returns the path to export/checkout to
     */
    function getToDir()
    {
        return $this->toDir;
    }

    //
    // Switches
    //

    /**
     * Sets the force switch
     */
    function setForce($value)
    {
        $this->svnSwitches['force'] = $value;
    }

    /**
     * Returns the force switch
     */
    function getForce()
    {
        return isset( $this->svnSwitches['force'] ) ? $this->svnSwitches['force'] : '';
    }

    /**
     * Sets the username of the user to export
     */
    function setUsername($value)
    {
        $this->svnSwitches['username'] = $value;
    }

    /**
     * Returns the username
     */
    function getUsername()
    {
        return isset( $this->svnSwitches['username'] ) ? $this->svnSwitches['username'] : '';
    }

    /**
     * Sets the password of the user to export
     */
    function setPassword($value)
    {
        $this->svnSwitches['password'] = $value;
    }

    /**
     * Returns the password
     */
    function getPassword()
    {
        return isset( $this->svnSwitches['password'] ) ? $this->svnSwitches['password'] : '';
    }

    /**
     * Sets the no-auth-cache switch
     */
    function setNoCache($value)
    {
        $this->svnSwitches['no-auth-cache'] = $value;
    }

    /**
     * Returns the no-auth-cache switch
     */
    function getNoCache()
    {
        return isset( $this->svnSwitches['no-auth-cache'] ) ? $this->svnSwitches['no-auth-cache'] : '';
    }
    
    /**
     * Sets the non-recursive switch
     */
    function setRecursive($value)
    {
        $this->svnSwitches['non-recursive'] = is_bool($value) ? !$value : TRUE;
    }
    
    /**
     * Returns the non-recursive switch
     */
    function getRecursive()
    {
        return isset( $this->svnSwitches['non-recursive'] ) ? $this->svnSwitches['non-recursive'] : '';
    }

    /**
     * Sets the ignore-externals switch
     */
    function setIgnoreExternals($value)
    {
        $this->svnSwitches['ignore-externals'] = $value;
    }
    
    /**
     * Returns the ignore-externals switch
     */
    function getIgnoreExternals()
    {
        return isset( $this->svnSwitches['ignore-externals'] ) ? $this->svnSwitches['ignore-externals'] : '';
    }
    
    /**
     * Creates a VersionControl_SVN class based on $mode
     *
     * @param string The SVN mode to use (info, export, checkout, ...)
     * @throws BuildException
     */
    protected function setup($mode)
    {
        $this->mode = $mode;
        
        // Set up runtime options. Will be passed to all
        // subclasses.
        $options = array('fetchmode' => VERSIONCONTROL_SVN_FETCHMODE_ASSOC, 'svn_path' => escapeshellarg($this->getSvnPath()));
        
        // Pass array of subcommands we need to factory
        $this->svn = VersionControl_SVN::factory($mode, $options);
                
        $this->svn->use_escapeshellcmd = false;

        if (!empty($this->repositoryUrl))
        {
            $this->svnArgs = array($this->repositoryUrl);
        }
        else
        if (!empty($this->workingCopy))
        {
            if (is_dir($this->workingCopy))
            {
                if (in_array(".svn", scandir($this->workingCopy)))
                {
                    $this->svnArgs = array(escapeshellarg($this->workingCopy));
                }
                else
                {
                    throw new BuildException("'".$this->workingCopy."' doesn't seem to be a working copy");
                }
            }
            else
            if ($mode=='info' )
            {
                if (is_file($this->workingCopy))
                {
                    $this->svnArgs = array(escapeshellarg($this->workingCopy));
                }
                else
                {
                    throw new BuildException("'".$this->workingCopy."' is not a directory nor a file");
                }
            }
            else
            {
                throw new BuildException("'".$this->workingCopy."' is not a directory");
            }
        }
    }
    
    /**
     * Executes the constructed VersionControl_SVN instance
     *
     * @param array Additional arguments to pass to SVN.
     * @param array Switches to pass to SVN.
     * @return string Output generated by SVN.
     */
    protected function run($args = array(), $switches = array())
    {
        $svnstack = PEAR_ErrorStack::singleton('VersionControl_SVN');
        
        $tempArgs = $this->svnArgs;
        
        $tempArgs = array_merge($tempArgs, $args);

        $tempSwitches = $this->svnSwitches;
        
        $tempSwitches = array_merge($tempSwitches, $switches);

        if ($output = $this->svn->run($tempArgs, $tempSwitches))
        {
            return $output;
        }
        else
        {
            if (count($errs = $svnstack->getErrors()))
            {
                $err = current($errs);
                
                throw new BuildException("Failed to run the 'svn " . $this->mode . "' command: " . $err['params']['errstr']);
            }
        }
    }
}