convertFrames

convertFrames.js

/**
 * @param frames number
 * @return string
 */
function format (frameNumber) {
    function convertFrames (frameNumber) {
        frameNumber = frameNumber + Math.round(frameNumber/1000);
        var frames = frameNumber % 30;

        var seconds = (( frameNumber - frames ) / 30) % 60;
        seconds = (seconds > 0) ? seconds : 0;

        var minutes = ((frameNumber - seconds * 30 - frames) / 1800 ) % 60;
        minutes = (minutes > 0) ? minutes : 0;

        var hours = ((frameNumber - minutes * 60 * 30 - seconds * 30 - frames) / 21600 ) % 12;
        hours = (hours > 0) ? hours : 0;

        return [hours, minutes, seconds, frames];
    }

    function convertToString (arr) {
        for (var i = 0; i < arr.length; i++) {
            if (arr[i] < 10){
                arr[i] = "0" + arr[i];
            }
        }
        return arr.join(' : ');
    }

    return convertToString(convertFrames(frameNumber));
}