<?php
/**
*
* This class for execute the external program of svn
*
* @auth Seven Yang <qineer@gmail.com>
*
*/
class SvnPeer
{

/**
* List directory entries in the repository
*
* @param string a specific project repository path
* @return bool true, if validated successfully, otherwise false
*/
static public function ls($repository)
{
$command = "svn ls " . $repository;
$output = SvnPeer::runCmd($command);
$output = implode("<br>", $output);
if (strpos($output, 'non-existent in that revision')) {
return false;
}

return "<br>" . $command . "<br>" . $output;
}

/**
* Duplicate something in working copy or repository, remembering history
*
* @param $src
* @param $dst
* @param $comment string specify log message
* @return bool true, if copy successfully, otherwise return the error message
*
* @todo comment need addslashes for svn commit
*/
static public function copy($src, $dst, $comment)
{
$command = "svn cp $src $dst -m '$comment'";
$output = SvnPeer::runCmd($command);
$output = implode("<br>", $output);

if (strpos($output, 'Committed revision')) {
return true;
}

return "<br>" . $command . "<br>" . $output;
}

/**
* Remove files and directories from version control
*
* @param $url
* @return bool true, if delete successfully, otherwise return the error message
*
* @todo comment need addslashes for svn commit
*/
static public function delete($url, $comment)
{
$command = "svn del $url -m '$comment'";
$output = SvnPeer::runCmd($command);
$output = implode('<br>', $output);
if (strpos($output, 'Committed revision')) {
return true;
}

return "<br>" . $command . "<br>" . $output;
}

/**
* Move and/or rename something in working copy or repository
*
* @param $src string trunk path
* @param $dst string new branch path
* @param $comment string specify log message
* @return bool true, if move successfully, otherwise return the error message
*
* @todo comment need addslashes for svn commit
*/
static public function move($src, $dst, $comment)
{
$command = "svn mv $src $dst -m '$comment'";
$output = SvnPeer::runCmd($command);
$output = implode('<br>', $output);

if (strpos($output, 'Committed revision')) {
return true;
}

return "<br>" . $command . "<br>" . $output;
}

/**
* Create a new directory under version control
*
* @param $url string
* @param $comment string the svn message
* @return bool true, if create successfully, otherwise return the error message
*
* @todo comment need addslashes for svn commit
*/
static public function mkdir($url, $comment)
{
$command = "svn mkdir $url -m '$comment'";
$output = SvnPeer::runCmd($command);
$output = implode('<br>', $output);

if (strpos($output, 'Committed revision')) {
return true;
}

return "<br>" . $command . "<br>" . $output;
}

static public function diff($pathA, $pathB)
{
$output = SvnPeer::runCmd("svn diff $pathA $pathB");
return implode('<br>', $output);
}

static public function checkout($url, $dir)
{
$command = "cd $dir && svn co $url";
$output = SvnPeer::runCmd($command);
$output = implode('<br>', $output);
if (strstr($output, 'Checked out revision')) {
return true;
}

return "<br>" . $command . "<br>" . $output;
}

static public function update($path)
{
$command = "cd $path && svn up";
$output = SvnPeer::runCmd($command);
$output = implode('<br>', $output);

preg_match_all("/[0-9]+/", $output, $ret);
if (!$ret[0][0]){
return "<br>" . $command . "<br>" . $output;
}

return $ret[0][0];
}

static public function merge($revision, $url, $dir)
{
$command = "cd $dir && svn merge -r1:$revision $url";
$output = implode('<br>', SvnPeer::runCmd($command));
if (strstr($output, 'Text conflicts')) {
return 'Command: ' . $command .'<br>'. $output;
}

return true;
}

static public function commit($dir, $comment)
{
$command = "cd $dir && svn commit -m'$comment'";
$output = implode('<br>', SvnPeer::runCmd($command));

if (strpos($output, 'Committed revision') || empty($output)) {
return true;
}

return $output;
}

static public function getStatus($dir)
{
$command = "cd $dir && svn st";
return SvnPeer::runCmd($command);
}

static public function hasConflict($dir)
{
$output = SvnPeer::getStatus($dir);
foreach ($output as $line){
if ('C' == substr(trim($line), 0, 1) || ('!' == substr(trim($line), 0, 1))){
return true;
}
}

return false;
}

/**
* Show the log messages for a set of path with XML
*
* @param path string
* @return log message string
*/
static public function getLog($path)
{
$command = "svn log $path --xml";
$output = SvnPeer::runCmd($command);
return implode('', $output);
}

static public function getPathRevision($path)
{
$command = "svn info $path --xml";
$output = SvnPeer::runCmd($command);
$string = implode('', $output);
$xml = new SimpleXMLElement($string);
foreach ($xml->entry[0]->attributes() as $key=>$value){
if ('revision' == $key) {
return $value;
}
}
}

static public function getHeadRevision($path)
{
$command = "cd $path && svn up";
$output = SvnPeer::runCmd($command);
$output = implode('<br>', $output);

preg_match_all("/[0-9]+/", $output, $ret);
if (!$ret[0][0]){
return "<br>" . $command . "<br>" . $output;
}

return $ret[0][0];
}

/**
* Run a cmd and return result
*
* @param string command line
* @param boolen true need add the svn authentication
* @return array the contents of the output that svn execute
*/
static protected function runCmd($command)
{
$authCommand = ' --username ' . SVN_USERNAME . ' --password ' . SVN_PASSWORD . ' --no-auth-cache --non-interactive --config-dir '.SVN_CONFIG_DIR.'.subversion';
exec($command . $authCommand . " 2>&1", $output);

return $output;
}
}