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              // --------------------------------
// Note: to make the DevToolAddon work, please make sure you access this codepen page through 'http' instead of 'https':
// https://codepen.io/bhou/pen/JbgprG

// ---------
// Please follow the steps to debug this app with collar dev tool
// 1. install collar-dev-server
// sudo npm install collar-dev-server
// 2. run collar-dev-server, type following command line:
// collar-dev-server
// 3. open http://localhost:7500
// 4. run this app
// 5. right click "delegate to double module" node, and select "show delegation"

collar.use(new DevToolAddon()) // comment this in production

// First, let's build a pipeline to double the input value
// and use "to" method to connect nodes as a pipeline
const ns1 = collar.ns('namespace1', {module: 'double'});
const filter = ns1.when('test "to" connection', s => {
  return s.get('value') % 2 === 0
});
const double = ns1.map('double the input value', s => {
  return s.new({    // use signal.new to create a new signal
    value: s.get('value') * 2
  });
});
const log = ns1.do('log the signal', s => {
  console.log(s.payload);
});

filter.to(double).to(log);

// Now create a host module to use the double module
// and use "through" method to delegate the processing
const ns2 = collar.ns('namespace2', {module: 'host'});
const filter2 = ns2.when('test "through" connection', s => {
  return s.get('value') % 2 === 0
});
const log2 = ns2.do('log the signal', s => {
  console.log(s.payload);
});

filter2
  .through('delegate to double module', filter, log)
  .to(log2)

// You should see two pipelines on collar dev tool (http://localhost:7500),
// right click the "delegate to double module" node, and select "show delegation"





            
          
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