<?php
class Pman_MTrack_Diff extends Pman {
    
    function getAuth()
    {
        die("nothing here yet");
    }
   
   
    static function toHTML($input)
    {
         
        $nlines = 0;

        if (is_resource($input)) {
            $lines = array();
            while (($line = fgets($input)) !== false) {
              $lines[] = rtrim($line, "\r\n");
            }
            $input = $lines;
        }
        
        // abase???
        if (is_string($input)) {
            $abase = md5($input);
            $input = preg_split("/\r?\n/", $input);
        } else {
            $abase = md5(join("\n", $input));
        }
        
        $ret = array();
           
        while (true) {
             
            
            if (!count($input)) {
                break;
            }
            
            $line = array_shift($input);
            $nlines++;
            
            if (!strncmp($line, '@@ ', 3)) {
                /* done with preamble */
                break;
            }
            $ret[] = (object)array(
                
                'line' => $line,
                'meta' => true,
                'cls' =>'meta'
                
            );
             
        }
        $class = 'meta';
          
        $lines = array(0, 0);
        $first = false;
        
        $in_meta = false;
        
        while (true) {
            $class = 'unmod';
            
            if (preg_match("/^@@\s+-(\pN+)(?:,\pN+)?\s+\+(\pN+)(?:,\pN+)?\s*@@/",
                  $line, $M)) {
                $lines[0] = (int)$M[1] - 1;
                $lines[1] = (int)$M[2] - 1;
                $class = 'meta';
                $first = true;
                $in_meta = false;
            } else if (preg_match("/^diff /", $line)) {
                $class = 'meta';
                $in_meta=true;
            
            } elseif (strlen($line)) {
                if ($line[0] == '-') {
                    $lines[0]++;
                    $class = 'removed';
                } elseif ($line[0] == '+') {
                    $lines[1]++;
                    $class = 'added';
                } else {
                    $lines[0]++;
                    $lines[1]++;
                }
            } else {
                $lines[0]++;
                $lines[1]++;
            }
            
            
            if ($in_meta) {
                $class = 'meta';
            }
            $cls = $class;
            
            if ($first) {
                $cls .= ' first';
            } else
            if ($class != 'meta' && $first) {
                $first = false;
            }
        

            $anchor = $abase . '.' . $nlines;
            $add = (object)array(
                
                'line' => $class == 'meta' ? $line : substr($line, 1),
                'meta' => $class == 'meta',
                'cls' => $cls,
                'anchor' => $class == 'meta' ? $anchor : false
            );
            
            $add->$class = true;
            
            $ret[] = $add;
           
        
            if (!count($input)) {
                break;
            }
            $line = array_shift($input);
            $nlines++;
        }
          
        if ($nlines == 0) {
            return null;
        }
      
        return $ret; 
    }
}