<?php

require_once 'MTrack/SCMEvent.php';
class MTrack_SCM_Git_Event extends MTrackSCMEvent 
{
    
    public $repo;
    /** Revision or changeset identifier for this particular file */
    public $rev;

    /** commit message associated with this revision */
    public $changelog;

    /** who committed this revision */
    public $changeby;
    
    /** branch for this revision */
    public $branch;
    /** when this revision was committed */
    public $ctime;

    /** files affected in this event; may be null, but otherwise
    * will be an array of MTrackSCMFileEvent */
    public $files;

    public $commit;
    /**
     * this is based on the output from git --raw --numstat
     */
    static function newFromCommit($commit, $repo)
    {
        
        $ent = new MTrack_SCM_Git_Event;
        $ent->commit = $commit;
        $ent->repo = $repo;
        $lines = explode("\n", $commit);
        $line = array_shift($lines);

        if (!preg_match("/^commit\s+(\S+)\s+(\S+)$/", $line, $M)) {
            return false;
        }
        $ent->rev = $M[1];
        $ent->branch = $M[2] ;
        $ent->tags = array(); // FIXME
        $ent->files = array();

        while (count($lines)) {
            $line = array_shift($lines);
            if (!strlen($line)) {
              break;
            }
            if (preg_match("/^(\S+):\s+(.*)\s*$/", $line, $M)) {
                $k = $M[1];
                $v = $M[2];

                switch ($k) {
                    case 'Author':
                      $ent->changeby = $v;
                      break;
                    case 'Date':
                      $ts = strtotime($v);
                      $ent->ctime = MTrackDB::unixtime($ts);
                      break;
                }
            }
        }

        $ent->changelog = "";

        if ($lines[0] == '') {
            array_shift($lines);
        }

        while (count($lines)) {
            $line = array_shift($lines);
            if (strncmp($line, '    ', 4)) {
              array_unshift($lines, $line);
              break;
            }
            $line = substr($line, 4);
            $ent->changelog .= $line . "\n";
        }

        if ($lines[0] == '') {
            array_shift($lines);
        }
        // this should only be the last set of lines..
        
        foreach ($lines as $line) {
            if (!strlen($line)) {
                continue;
            }
              
            if (preg_match('#^:#', $line)) {
                // it's our stat line..:
                // :100755 100755 fde93abd1a71accd3aa7e97b29c1eecfb43095d7 
                // 3d71edf6512035846d8164c3b28818de0062335a M      web/MTrackWeb/DataObjects/Changes.php
                $info = preg_split('#\s+#', substr($line ,1), 6);
               // print_r($info);
                $f = new MTrackSCMFileEvent; //generic..
                $f->name = $info[5];
                $f->oldperm = $info[0];
                $f->newperm = $info[1];
                $f->oldver = $info[2];
                $f->newver = $info[3];
                $f->status = $info[4];
                $ent->files[$f->name] = $f;
                continue;
            }
         
            $info = preg_split('#\s+#', substr($line ,1), 3);
           //print_r($info);
            $name = $info[2];
            if (!isset($ent->files[$name])) {
                $ent->files[$name] = new stdClass; // ??
            }
            
            $ent->files[$name]->added = $info[0];            
            $ent->files[$name]->removed = $info[1];
        }
        // fixme..
        //if (!count($ent->branches)) {
        //    $ent->branches[] = $this->branch; //'master';
        //}
        $ent->files_array = array_values($ent->files);
        return $ent;
    }
 
    
}