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#!/usr/bin/php
<?php
 
/**
 * Small script for downloading music from emusic.com
 * I have had troubles before using the client. So
 * I made this small script which does the same as a
 * java client on 8MB.
 *
 * Script will creates folders for artists and folders
 * for albums inside artist dir.
 *
 * REQUIREMENTS:
 *
 * You need a version of PHP5-cli and wget
 *
 * INSTALL:
 *
 * Place the script somewhere, e.g. your bin dir
 * and make it executable
 * $ chmod +x em-dl.php
 *
 * USAGE:
 *
 * When browsing the emusic.com site and your find music
 * you like just press the download link and save the file
 * to some location. Remember the location and run the script
 * with the downloaded emx file as argument, e.g.:
 *
 * ./em-dl.php 1231234.emx
 *
 * For a directoy filled with emx files use:
 *
 * ./em-dl.php *
 *
 * CONFIGURATION
 *
 * edit the following three lines
 *
 */
define ('DOWNLOAD_DIR' , '/home/dennis/music');
define ('VERBOSE', true );
define ('EXTENSION', 'mp3');
 
// {{{ __exec($command)
/**
 * function for executing commands with php built-in command exec
 * @param  string $command to execute
 * @return int    $ret the value returned by the shell script being
 *                 executed through exec()
 */
function __exec($command){
    $output = array();
    exec($command.' 2>&1', $output, $ret);
    if ($ret == 0){
        echo "Executed command: " . wordwrap($command) . " with success\n";
    } else {
        echo "Something wrong: Here is what exec says: ";
        $end_output = '';
        foreach($output as $key => $val){
            $end_output.= $val;
        }
        $end_output = wordwrap($end_output) . "\n";
        print $end_output;
        exit(255);
    }
    return $ret;
}
// }}}
// {{{ get_tracklist($simple_xml)
function get_tracklist($simple_xml){
    $tracklist = $simple_xml->TRACKLIST;
    return $tracklist;
}
// }}}
// {{{ space_replace ($str)
function space_replace($str){
    $str = str_replace(' ', '_', $str);
    $str = str_replace('/', '|', $str); // forward slash can confuse (directory)
    return $str;
}
// }}}
// {{{ get_two_digit()
function get_two_digit ($number){
    if ($number > 0 && $number < 10){
        $number = "0" . $number;
    }
    return $number;
}
// }}}
// {{{ download_tracks($xml)
function download_tracks($xml){
    $tracklist = get_tracklist($xml);
    foreach ($tracklist->TRACK as $key => $val){
        // dir to place track
        $save_dir = DOWNLOAD_DIR . "/" . space_replace($val->ARTIST) . "/" . space_replace($val->ALBUM);
        if (!file_exists($save_dir)){
            mkdir($save_dir, 0755, true);
        }
        $save_file = $save_dir . "/" . get_two_digit($val->TRACKNUM) . "_" . space_replace($val->TITLE) . ".mp3";
        $wget_exec = "wget -c -P \"$save_dir\" -O \"$save_file\" $val->TRACKURL";
        __exec($wget_exec);
    }
}
// }}}
// {{{ main()
function main () {
    global $argv;
    foreach ($argv as $key => $val){
        if ($key === 0){
            continue;
        }
        if ($val == $argv[0]){
            continue;
        }
 
        $xml = simplexml_load_file($val);
        download_tracks($xml);
    }
}
// }}}
 
main();
exit(0);