<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
//          also https://github.com/JamesHeinrich/getID3       //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// write.lyrics3.php                                           //
// module for writing Lyrics3 tags                             //
// dependencies: module.tag.lyrics3.php                        //
//                                                            ///
/////////////////////////////////////////////////////////////////


class getid3_write_lyrics3
{
    public 
$filename;
    public 
$tag_data;
    
//public $lyrics3_version = 2;       // 1 or 2
    
public $warnings        = array(); // any non-critical errors will be stored here
    
public $errors          = array(); // any critical errors will be stored here

    
public function __construct() {
        return 
true;
    }

    public function 
WriteLyrics3() {
        
$this->errors[] = 'WriteLyrics3() not yet functional - cannot write Lyrics3';
        return 
false;
    }
    public function 
DeleteLyrics3() {
        
// Initialize getID3 engine
        
$getID3 = new getID3;
        
$ThisFileInfo $getID3->analyze($this->filename);
        if (isset(
$ThisFileInfo['lyrics3']['tag_offset_start']) && isset($ThisFileInfo['lyrics3']['tag_offset_end'])) {
            if (
is_readable($this->filename) && is_writable($this->filename) && is_file($this->filename) && ($fp fopen($this->filename'a+b'))) {

                
flock($fpLOCK_EX);
                
$oldignoreuserabort ignore_user_abort(true);

                
fseek($fp$ThisFileInfo['lyrics3']['tag_offset_end']);
                
$DataAfterLyrics3 '';
                if (
$ThisFileInfo['filesize'] > $ThisFileInfo['lyrics3']['tag_offset_end']) {
                    
$DataAfterLyrics3 fread($fp$ThisFileInfo['filesize'] - $ThisFileInfo['lyrics3']['tag_offset_end']);
                }

                
ftruncate($fp$ThisFileInfo['lyrics3']['tag_offset_start']);

                if (!empty(
$DataAfterLyrics3)) {
                    
fseek($fp$ThisFileInfo['lyrics3']['tag_offset_start']);
                    
fwrite($fp$DataAfterLyrics3strlen($DataAfterLyrics3));
                }

                
flock($fpLOCK_UN);
                
fclose($fp);
                
ignore_user_abort($oldignoreuserabort);

                return 
true;

            } else {
                
$this->errors[] = 'Cannot fopen('.$this->filename.', "a+b")';
                return 
false;
            }
        }
        
// no Lyrics3 present
        
return true;
    }

}