write.lyrics3.php

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<?php
//  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($fp, LOCK_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, $DataAfterLyrics3, strlen($DataAfterLyrics3));
                                }

                                flock($fp, LOCK_UN);
                                fclose($fp);
                                ignore_user_abort($oldignoreuserabort);

                                return true;

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

}