function endsWith(str, suffix) {
    return str.indexOf(suffix, str.length - suffix.length) !== -1;
}

export default (function (file, acceptedFiles) {
    if (file && acceptedFiles) {
        var acceptedFilesArray = Array.isArray(acceptedFiles) ? acceptedFiles : acceptedFiles.split(',');
        var fileName = file.name || '';
        var mimeType = file.type || '';
        var baseMimeType = mimeType.replace(/\/.*$/, '');

        return acceptedFilesArray.some(function (type) {
            var validType = type.trim();
            if (validType.charAt(0) === '.') {
                return endsWith(fileName.toLowerCase(), validType.toLowerCase());
            } else if (/\/\*$/.test(validType)) {
                // This is something like a image/* mime type
                return baseMimeType === validType.replace(/\/.*$/, '');
            }
            return mimeType === validType;
        });
    }
    return true;
});