condensation/lib/condensation/template-helpers/partial.js

Package, reuse and share particles for CloudFormation projects

var File = require('vinyl');
var _ = require('lodash');
var fs = require('fs');
var matter = require('gray-matter');

var helper = function(cModule,pPath,hArgs,hOpts,cOpts) {

  var engine = cOpts.handlebars;
  var particle = cOpts.particleLoader.loadParticle('partial',cModule,pPath,{parentFile: hOpts.data._file});
  var file = new File({path: particle.path});
  var m = matter(fs.readFileSync(particle.fsPath,{encoding:'utf8'}));

  if (!engine.partials[particle.path]) {
    engine.registerPartial(particle.path,m.content);
  }

  var fn = engine.compile(m.content,{noEscape:true});
  var data = cOpts.handlebars.createFrame(hOpts.data || {});
  var extended = data._partialExtended || false;
  data._file = file;
  data._partialExtended = true;

  var templateContent = '';
  if (extended === true) {
    // If extending another partial merge options in reverse
    templateContent = new engine.SafeString(fn(_.merge(m.data,hOpts.hash,this),{data:data}));
  }
  else {
    templateContent = new engine.SafeString(fn(_.merge(m.data,this,hOpts.hash),{data:data}));
  }
  return templateContent;
};

module.exports.name = 'partial';
module.exports.helper = helper;