A Nodejs script to extract name and phone numbers (only) from a bunch of VCF files into a csv file.

sri_vcf_to_csv.js

#!/usr/bin/node


/**
  * Author : Srirang (Brahmana)
  * Blog : http://techbrahmana.blogspot.com/
  * Site : http://srirang.co.cc/
  *
  * As it is evident this is an absolutely crude script (The output file path is hardcoded... !!!).
  * But this works. I have tried this on the VCF files generated by a Nokia 3600 Slide backup operation.
  * This script only extracts the Name and the phone numbers. I do not know the actual VCF spec. I just looked at a
  * few VCF files and figured out the N line (for name) and TEL line (for phone numbers). It pulls out every number
  * but not the type - like Work, Cellphone, etc..
  *
  * Usage : $>node <path-to-this-script> <path-to-vcf-file(s)>
  * If you have multiple files, just use the shell wild characters (*) like this :
  *
  * $>node <path-to-this-script> /directory-containing-vcf-files/*.vcf
  *
  * I don' think this script is ever going to be used by anyone else, but still just to be on the safer side I am 
  * including this licensing thing here. It's GPLv3 or later.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.

  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.

  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */

var fs = require('fs');

function vcfToCsv(vcfStr) {
  // Split and those stuff
  var lines = vcfStr.split('\r\n');
  var csvStr = '';
  var name = ''
  var numbers = [];
  for(var l in lines) {
    line = lines[l];
    if (line[0] == 'N') {
      var parts = line.split(':');
      name = parts[parts.length - 1];
    }

    if (line.indexOf('TEL') == 0) {
      var parts = line.split(':');
      var num = parts[parts.length - 1];
      numbers.push(num);
    }
  }

  csvStr += name;
  for (var n in numbers) {
    csvStr += ',' + numbers[n];
  }

  csvStr += '\n';
  return csvStr;
}

vcfList = [];
csvList = '';
args = process.argv;
synError = false;
vcfStartIndex = 2;
filesDone = 0;

if (args.length < 3)
{
  if (args.length == 2 && args[0] == "node")
    synError = true;
  else
    vcfStartIndex = 1;
}

if (synError) {
  console.log("Usage : \nnode <path-to-this-script> <path-to-vcf-file(s)>\nor\n<path-to-this-script> <path-to-vcf-file(s)");
  return;
}

vcfList = args.slice(vcfStartIndex);

vcfList.forEach(function(vcfFileName) {
                  fs.readFile(vcfFileName, 
                    function(err, data) {
                      if (err)
                        console.log(err.message);

                      csvStr = vcfToCsv(data.toString());
                      csvList += csvStr;
                      filesDone++;
                    });
                });

console.log("Processing : ");

function sleep() {
  setTimeout(writeCsv, 2000);
}

function writeCsv() {
  if (filesDone < vcfList.length) {
    console.log(".");
    sleep();
  }
  else {
    fs.writeFile('/path/to/output.csv', csvList.toString(),
                  function(err) {
                    if (err)
                      console.log(err.message);
                    else
                      console.log("CSV Saved\n");
                  });
  }
}

sleep();