twitter_collect.js

#!/usr/bin/env node

var OAuth = require('oauth').OAuth;
var colors = require('colors');

var access_token = null;
var access_token_secret = null;
var key = null;
var secret = null;

var auth_token = "";
var auth_secret = "";

var REQUEST_TOKEN_URL = 'http://api.twitter.com/oauth/request_token';
var ACCESS_TOKEN_URL = 'http://api.twitter.com/oauth/access_token';
var OAUTH_VERSION = '1.0';
var HASH_VERSION = 'HMAC-SHA1';

var since_id = null;

var fs = require('fs');

function getAccessToken(oa, oauth_token, oauth_token_secret, pin) {
  oa.getOAuthAccessToken(oauth_token, oauth_token_secret, pin, function(error, oauth_access_token, oauth_access_token_secret, results2) {
    if (error) {
      if (parseInt(error.statusCode) == 401) {
        throw new Error('The pin number you have entered is incorrect'.bold.red);
      }
    }
    console.log('Your OAuth Access Token: '.green + (oauth_access_token).bold.cyan);
    console.log('Your OAuth Token Secret: '.green + (oauth_access_token_secret).bold.cyan);

    access_token_secret = oauth_access_token_secret;
    access_token = oauth_access_token;

    console.log("Starting Collection ....");

    fs.open("tweets.csv", 'a', 0666, function(err, fd) {

      //Write the header
      fs.write(fd, "tweetID, tweet, lat, lon\n", null, undefined, function(err, written) {});

      //Start Collecting in here: 
      setInterval(function() {
        getGeoSearchWithTag("", "51.5", "0.0", "30km", 100, function(data) {

          var tweets = JSON.parse(data);
          
          if(tweets.max_id_str != undefined){
            since_id = tweets.max_id_str;
          }

          var csvString = "";

          for (var i = 0; i < tweets.statuses.length; i++) {
            var t = tweets.statuses[i];

            var lat = null
            var lng = null;
            if (t.geo != undefined) {
              lat = t.geo.coordinates[0];
              lng = t.geo.coordinates[1];
            }

            if (lat != null && lng != null) {
              csvString += t.user.id_str + ", \"" + escape_string(t.text) +  "\"," + lat + ", " + lng + "\n";
            }
          }

          console.log(csvString);

          fs.write(fd, csvString, null, undefined, function(err, written) {
            //console.log('bytes written: ' + written);
          });
        });
      }, 10 * 1000);

    });

  });


}

function getRequestToken(oa) {
  oa.getOAuthRequestToken(function(error, oauth_token, oauth_token_secret, results) {
    if (error) {
      throw new Error(([error.statusCode, error.data].join(': ')).bold.red);
    } else {

      var url = "https://twitter.com/oauth/authorize?oauth_token=" + oauth_token;
      console.log('In your browser, log in to your twitter account.  Then visit:'.bold.green);
      console.log(('https://twitter.com/oauth/authorize?oauth_token=' + oauth_token).underline.green);
      console.log('After logged in, you will be promoted with a pin number'.bold.green);
      console.log('Enter the pin number here:'.bold.yellow);

      var stdin = process.openStdin();
      stdin.on('data', function(chunk) {
        pin = chunk.toString().trim();
        if (pin != "") {
          getAccessToken(oa, oauth_token, oauth_token_secret, pin);
        }
      });
    }
  });
}

var setupOAuth = function(app_key, app_secret) {
    // Authenticate with Twitter based on the app key and app secret passed
    oa = new OAuth(REQUEST_TOKEN_URL, ACCESS_TOKEN_URL, app_key, app_secret, OAUTH_VERSION, null, HASH_VERSION);
    getRequestToken(oa);
  }

var setupOAuthWithTokens = function(app_key, app_secret, oauth_access_token, oauth_token_secret) {
    // if token and secret is passed then bypass authentication
    oa = new OAuth(REQUEST_TOKEN_URL, ACCESS_TOKEN_URL, app_key, app_secret, OAUTH_VERSION, null, HASH_VERSION);
    access_token = oauth_access_token;
    access_token_secret = oauth_token_secret;
    console.log("Starting Collection ....");
  }

var getGeoSearch = function(lat, lng, rad, count, callback) {
    oa.get("https://api.twitter.com/1.1/search/tweets.json?count=" + count + "&geocode=" + lat + "," + lng + "," + rad, access_token, access_token_secret, function(error, data) {
      var result;
      if (error) {
        result = {
          error: error
        };
      } else {
        result = data;
      }
      callback(result);
    });
  };

var getGeoSearchWithTag = function(query, lat, lng, rad, count, callback) {
    var url = "https://api.twitter.com/1.1/search/tweets.json?q=" + encodeURIComponent(query) + "&count=" + count + "&geocode=" + lat + "," + lng + "," + rad;

    if (since_id != null) {
      url += "&since_id=" + since_id;
      console.log(since_id);
    }

    oa.get(url, access_token, access_token_secret, function(error, data) {
      var result;
      if (error) {
        result = {
          error: error
        };
      } else {
        result = data;
      }
      callback(result);
    });
  };

var getSearch = function(query, count, callback) {
    oa.get("https://api.twitter.com/1.1/search/tweets.json?q=" + encodeURIComponent(query) + "&count=" + count, access_token, access_token_secret, function(error, data) {
      var result;
      if (error) {
        result = {
          error: error
        };
      } else {
        result = data;
      }
      callback(result);
    });
  };

function escape_string (str) {
    if(str == undefined){ return str; }
    return str.replace(/[\0\x08\x09\x1a\n\r"'\\\%]/g, function (char) {
        switch (char) {
            case "\0":
                return "\\0";
            case "\x08":
                return "\\b";
            case "\x09":
                return "\\t";
            case "\x1a":
                return "\\z";
            case "\n":
                return "\\n";
            case "\r":
                return "\\r";
            case "\"":
            case "'":
            case "\\":
            case "%":
                return "\\"+char; // prepends a backslash to backslash, percent,
                                  // and double/single quotes
        }
    });
}

setupOAuth(auth_token, auth_secret);