gistfile1.txt

  printToPdf({orientation, scale, background, width, height, top, bottom, left, right, shrinkToFit, pageRanges}) {
    let page = {};
    let margin = {};
    let keys = arguments[0];
    let params= {};

    Object.keys(keys).forEach(function(key){
      switch (key) {
        case 'orientation':
          if(orientation && orientation !== 'landscape' && orientation !== 'portrait') {
            throw new error.InvalidArgumentError(
                `Invalid argument '${orientation}'. It should be either "landscape" (or) "portrait"`);
          } else {
            params.orientation = keys[key];
          }
          break;

        case 'scale':
          if(scale >= 0.1 && scale <=2 && typeof scale === 'number' && scale) {
            params.scale = keys[key];
          } else {
            throw new error.InvalidArgumentError(
                `Invalid argument '${scale}'. It scale should be in between > 0.1 and < 2`);
          }
          break;

        case 'background':
          if(background && background!==true && background !== false) {
            throw new error.InvalidArgumentError(
                `Invalid argument '${background}'. It should be either "true" (or) "false"`);
          } else {
            params.background = keys[key];
          }
          break;

        case 'width':
          if(width && typeof width === 'number' && width >= 0) {
            page.width = keys[key];
            params.page = page;
          } else {
            throw new error.InvalidArgumentError(
                `Invalid argument '${width}'. It width should be of type 'integer' and >= 0`);
          }
          break;

        case 'height':
          if(height && typeof height === 'number' && height >= 0) {
            page.height = keys[key];
            params.page = page;
          } else {
            throw new error.InvalidArgumentError(
                `Invalid argument '${height}'. It width should be of type 'integer' and >= 0`);
          }
          break;

        case 'top':
          if(top && typeof top === 'number' && top >= 0) {
            margin.top = keys[key];
            params.margin = margin;
          } else {
            throw new error.InvalidArgumentError(
                `Invalid argument '${top}'. It width should be of type 'integer' and >= 0`);
          }
          break;

        case 'left':
          if(left && typeof left === 'number' && left >= 0) {
            margin.left = keys[key];
            params.margin = margin;
          } else {
            throw new error.InvalidArgumentError(
                `Invalid argument '${left}'. It width should be of type 'integer' and >= 0`);
          }
          break;


        case 'bottom':
          if(bottom && typeof bottom === 'number' && bottom >= 0) {
            margin.bottom = keys[key];
            params.margin = margin;
          } else {
            throw new error.InvalidArgumentError(
                `Invalid argument '${bottom}'. It width should be of type 'integer' and >= 0`);
          }
          break;


        case 'right':
          if(right && typeof right === 'number' && right >= 0) {
            margin.right = keys[key];
            params.margin = margin;
          } else {
            throw new error.InvalidArgumentError(
                `Invalid argument '${right}'. It width should be of type 'integer' and >= 0`);
          }
          break;

        case 'shrinkToFit':
          if(shrinkToFit && shrinkToFit !== true && shrinkToFit !== false) {
            throw new error.InvalidArgumentError(
                `Invalid argument '${shrinkToFit}'. It should be either "true" (or) "false"`);
          } else {
            params.shrinkToFit = keys[key];
          }
          break;

        case 'pageRanges':
          if(pageRanges && pageRanges instanceof Array || typeof pageRanges === 'string') {
            params.pageRanges = keys[key];
          } else {
            throw new error.InvalidArgumentError(
                `Invalid argument '${shrinkToFit}'. It should be either array of page numbers (or) String notation `);
          }
          break;
      }
    });

console.log(params);
    return this.execute(
        new command.Command(command.Name.PRINT_PAGE).setParameters(params));
  }