node-deadline/lib/jobs/FrameRange.js

Module to interface with Deadline Compute Management System by Thinkbox Software

var FrameRange = module.exports = function( string ) {
  this.raw = "";
  this.count = 0;
  this.frames = [];

  if ( "undefined" != typeof string ) {
    this.parse( string );
  }
};

FrameRange.prototype.parse = function( fString ) {

  var i, f, range, ranges,
      frames, bkwd;

  if ( "string" != typeof fString ) {
    return;
  }

  this.frames = [];
  this.count = 0;
  this.ranges = [];

  ranges = fString.split( / |,/g );

  for ( i in ranges ) {

    //skip empty ranges
    if ( ranges[ i ] === "" ) {
      continue;
    }

    //if one number, simply parse it
    if ( !isNaN( ranges[ i ] ) ) {
      f = parseInt( ranges[ i ] );
      this.frames.push( f );
      this.count++;
      this.ranges.push( f );
      continue;
    }

    //look for a range specifyer
    range = ranges[ i ].match( /(.*)(-|:)/ );
    this.ranges.push( range );
    if ( null === range ) {
      console.log( "unknown range:", ranges[ i ] );
      continue;
    }

    //extract what's left as the second variable
    range[ 2 ] = ranges[ i ].substr( range[ 0 ].length );

    //make sure the starting frame is valid
    if ( isNaN( range[ 1 ] ) ) {
      console.log( "unknown range start:", range[ 1 ] );
      continue;
    }
    range[ 1 ] = parseInt( range[ 1 ] );

    //check for a step
    range.step = 1;
    if ( isNaN( range[ 2 ] ) ) {

      //parse out step specifier
      range.step = range[ 2 ].match( /(.*)(x|:|step|by|every)/ );
      if ( null === range.step || isNaN( range.step[ 1 ] ) ) {
        console.log( "unknown range end:", range[ 2 ] );
        continue;
      }

      //extract what's left as the second variable
      range.step[ 2 ] = range[ 2 ].substr( range.step[ 0 ].length );

      range[ 2 ] = parseInt( range.step[ 1 ] );
      if ( isNaN( range.step[ 2 ] ) ) {
        console.log( "unknown range step:", range.step[ 2 ] );
        continue;
      }
      range.step = parseInt( range.step[ 2 ] );
    }
    else {
      range[ 2 ] = parseInt( range[ 2 ] );
    }

    frames = [];
    bkwd = range[ 1 ] > range[ 2 ];
    for ( i = range[ 1 ]; bkwd ? i >= range[ 2 ] : i <= range[ 2 ]; bkwd ? i -= range.step : i += range.step ) {
      frames.push( i );
      this.count++;
    }
    if ( bkwd ) {
      frames.reverse();
    }

    this.frames = this.frames.concat( frames );

  }
};

FrameRange.toArray = function() {
  return this.frames;
};