padmaEssay/utils.js

/*
John Resig's templating utility - http://ejohn.org/blog/javascript-micro-templating/
Not updated code to resolve issue with single quotes from: http://www.west-wind.com/Weblog/posts/509108.aspx
define templates inside <script type="text/html" id="foo"> tags
get html of template with tmpl("foo", json)
*/


// Simple JavaScript Templating
// John Resig - http://ejohn.org/ - MIT Licensed
(function(){
  var cache = {};
 
  this.tmpl = function tmpl(str, data){
    // Figure out if we're getting a template, or if we need to
    // load the template - and be sure to cache the result.
    var fn = !/\W/.test(str) ?
      cache[str] = cache[str] ||
        tmpl(document.getElementById(str).innerHTML) :
     
      // Generate a reusable function that will serve as a template
      // generator (and which will be cached).
      new Function("obj",
        "var p=[],print=function(){p.push.apply(p,arguments);};" +
       
        // Introduce the data as local variables using with(){}
        "with(obj){p.push('" +
       
        // Convert the template into pure JavaScript
        str
          .replace(/[\r\t\n]/g, " ")
          .split("<%").join("\t")
          .replace(/((^|%>)[^\t]*)'/g, "$1\r")
          .replace(/\t=(.*?)%>/g, "',$1,'")
          .split("\t").join("');")
          .split("%>").join("p.push('")
          .split("\r").join("\\'")
      + "');}return p.join('');");
   
    // Provide some basic currying to the user
    return data ? fn( data ) : fn;
  };
})();

/**
* Returns time-code in npt format from pos in miliseconds
* @param {Int} pos Position in miliseconds
* @returns {String} Time-code in npt format.
*/
function ms2npt(pos) {
    var h = Math.floor(pos / 3600000);
    var m = Math.floor(pos % 3600000 / 60000);
    var s = Math.floor(pos % 60000 / 1000);
    var ms = pos % 1000;
    return h.toString().pad('0', 2) + ':' + m.toString().pad('0', 2) + ':' + s.toString().pad('0', 2) + '.' + ms.toString().pad('0', 3);
    // return strpad(h.toString(), '0', 2, 'left') + ':' + strpad(m.toString(), '0', 2, 'left') + ':' + strpad(s.toString(), '0', 2, 'left') + '.' + strpad(ms.toString(), '0', 3, 'left');
}

function npt2ms(npt) {
  var ms = 0.0;
  var p = npt.split(':');
  for (i=0; i<p.length; i++) {
    ms = ms * 60 + parseFloat(p[i]);
  }
  return ms * 1000;
}


String.prototype.pad = function(pad, len, dir) {
    if (typeof(dir) == 'undefined')
        dir = 'left';
    var str = this;
    while (str.length < len) {
        if (dir == 'left')
            str = pad + str;
        else if (dir == 'right')
            str = str + pad;
    }
    return str;
}

/*
Gives a bunch of data parsed from a pad.ma url
  Returns:
    {
      'videoId': string, id of pad.ma video
      'type': string, type of link -- info, editor, layer, tcRange, tc or list.
      'layerId': string, id of layer, (if type=="layer")
      'tcIn': timecode, in npt format (if type == "tcRange")
      'tc': timecode, in npt format (if type == 'tc')
    }
*/

  function parsePadmaUrl(link, padma_url) {
//    console.log(padma_url);
    var linkStr = link.replace(padma_url, "");
//    console.log(linkStr);
 //   console.log(linkStr);
    var r = { };
    r.url = link;
//    console.log(link);
    if (linkStr.charAt(0) == 'V') {
//      console.log("Hello");
      var idRegex = /V(.{1,7})/;
      var idMatch = linkStr.match(idRegex);
 //     console.log("match", idMatch);
      r.videoId = idMatch[0];
//      console.log(videoId);  
      var postIdStr = linkStr.replace(idMatch[0] + "/", '');
      if (postIdStr == 'info' || postIdStr == '') {
        r.type = 'info';
        return r;
      } else if (postIdStr == 'editor') {
        r.type = 'editor';
        return r;
      } else if (postIdStr.charAt(0) == 'L') {
        r.type = 'layer';
        r.layerId = postIdStr;
        return r;
      } else if (postIdStr.indexOf("-") != -1) {
        var tcs = postIdStr.split("-");
        r.type = 'tcRange';
        r.tcIn = tcs[0];
        r.tcOut = tcs[1];
        return r;
      } else {
        r.type = 'tc';
        r.tc = postIdStr;
        return r;
      }
    } else if (linkStr.substring(0,7) == 'find?l=') {
      r.type = 'list';
      r.listId = linkStr.match(/l\=(L.*?)$/)[1];
      return r;
    } else {
      return false;
    }
  }