rename_ebooks.cmd

@if(0)==(0) ECHO OFF
CScript.exe //NoLogo //E:JScript "%~f0" %*
pause
GOTO :EOF
@end

var fso = new ActiveXObject('Scripting.FileSystemObject');

if (!fso.FolderExists('dist')) {
    fso.CreateFolder('dist');
}

var folder = fso.GetFolder('.');
for (var files = new Enumerator(folder.Files); !files.atEnd(); files.moveNext()) {
    var file = files.item().Name;
    if (!file.match(/^(?:[0-9a-f]+|oreilly)-([-0-9X]+)e?.pdf$/)) {
        continue;
    }
    var isbn = RegExp.$1.replace(/-/g, '');
    var title = get_title(isbn);
    var dist_file = 'dist\\' + title.replace(/[\\/:*?"<>|]/g, '') + '.pdf';
    if (fso.FileExists(dist_file)) {
        WScript.Echo("skipped: " + dist_file + ' (already exists)');
        continue;
    }
    fso.CopyFile(file, dist_file, false);
    WScript.Echo("copied: " + file + ' -> ' + dist_file);
}

function get_title(isbn) {
    var xhr = new ActiveXObject('Msxml2.XMLHTTP');
    xhr.open('GET', 'http://www.oreilly.co.jp/books/' + isbn + '/biblio.json', false);
    xhr.send(null);
    var json = xhr.responseText;

    var data;
    try {
        data = eval('(' + json + ')');
    } catch(e) {
        WScript.Echo('Invalid ISBN: ' + isbn);
        WScript.Quit();
    }
    return data.title;
}