var dateParam = function()

in js/libs/ical.js [99:157]
42 lines of code
6 McCabe index (conditional complexity)

    var dateParam = function(name){
        return function (val, params, curr) {
  
        var newDate = text(val);
  
  
        if (params && params[0] === "VALUE=DATE") {
          // Just Date
  
          var comps = /^(\d{4})(\d{2})(\d{2})$/.exec(val);
          if (comps !== null) {
            // No TZ info - assume same timezone as this computer
            newDate = new Date(
              comps[1],
              parseInt(comps[2], 10)-1,
              comps[3]
            );
  
            newDate = addTZ(newDate, params);
            newDate.dateOnly = true;
  
            // Store as string - worst case scenario
            return storeValParam(name)(newDate, curr)
          }
        }
  
  
        //typical RFC date-time format
        var comps = /^(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})(\d{2})(Z)?$/.exec(val);
        if (comps !== null) {
          if (comps[7] == 'Z'){ // GMT
            newDate = new Date(Date.UTC(
              parseInt(comps[1], 10),
              parseInt(comps[2], 10)-1,
              parseInt(comps[3], 10),
              parseInt(comps[4], 10),
              parseInt(comps[5], 10),
              parseInt(comps[6], 10 )
            ));
            // TODO add tz
          } else {
            newDate = new Date(
              parseInt(comps[1], 10),
              parseInt(comps[2], 10)-1,
              parseInt(comps[3], 10),
              parseInt(comps[4], 10),
              parseInt(comps[5], 10),
              parseInt(comps[6], 10)
            );
          }
  
          newDate = addTZ(newDate, params);
      }
  
  
            // Store as string - worst case scenario
        return storeValParam(name)(newDate, curr)
        }
    }