recommend.js

var prompt = require('prompt');

console.log('Collecting tags...');
var collectTags = require('./lib/collectTags.js');
collectTags('./data/graph.in', process);

function process(result) {
  var tags = result.tags;
  console.log('Collected ' + result.totalTags + '; Unique tags: ' + result.uniqueTags);


  console.log('Computing page rank...');
  var computePageRank = require('./lib/computePageRank.js');
  var rank = computePageRank('./data/dependenciesGraph.out.graph');
  console.log('Done');

  prompt.start();
  getNextInput();

  function getNextInput() {
    prompt.get([{
      description: 'Enter package keyword',
      name: 'keyword'
    }], function (err, result) {
      var matches = (tags[result.keyword] || []).sort(byPagerank);
      console.log('----------------------------------------------------------------------');
      console.log(matches.slice(0, Math.min(20, matches.length)).map(toDisplay).join('\n'));
      getNextInput();
    });
  }

  function toDisplay(x) {
    return 'https://www.npmjs.com/package/' + x + ' - ' + rank[x];
  }

  function byPagerank(x, y) {
    return rank[y] - rank[x];
  }
}