comparative-judgement/lib/readCsv.js

Comparative Judgement Algorithms

var csv = require('fast-csv');
var async = require('async');
var interRater = require('./interRater');
var fs = require("fs");
var _ = require("underscore");

function irCsv(iters, file, exclude, callback){
  console.log(iters, file, exclude);
  var decisions;
  var out;
  async.series([
      function(callback){
          readDecisionsCsv(file, function(err, dat){
            decisions = dat;
            callback();
          });
      },
      function(callback){
          interRater.interRaterReliability(iters, decisions, exclude, function(err, dat){
            out = dat;
            callback();
          });
      },
      function(callback){
        writeInterRaterCsv(out, function(err, result){
          callback();
        });
      }
  ],
  function(err){
      callback();
  });
}

var readDecisionsCsv = function(csvFile, callback){
    var decisions = [];
    csv
      .fromPath(csvFile, {headers:true})
      .on("data", function(data){
        decisions.push({chosen:data['Candidate Chosen'], notChosen:data['Candidate Not Chosen'], judge:data.Judge});
      })
      .on("end", function(){
        callback(null, decisions);
      });
};

var writeInterRaterCsv = function(data, callback){
    var fn = Date.now() + '.csv';
    var ws = fs.createWriteStream(fn);
    var dat = [];
    for(var i=0; i<data.values.length; i++){
      dat.push({cor:data.values[i]});
    }
    csv
      .write(dat, {
        headers: false,
      })
      .pipe(ws);
      callback(null, 'csv written');
};

module.exports = {
  irCsv:irCsv,
};