/*
* fingerprintJS 0.5.5 - Fast browser fingerprint library
* https://github.com/Valve/fingerprintjs
* Copyright (c) 2013 Valentin Vasilyev (valentin.vasilyev@outlook.com)
* Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) license.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

;(function (name, context, definition) {
    if (typeof module !== 'undefined' && module.exports) { module.exports = definition(); }
    else if (typeof define === 'function' && define.amd) { define(definition); }
    else { context[name] = definition(); }
  })('Fingerprint', this, function () {
    'use strict';
  
    var Fingerprint = function (options) {
      var nativeForEach, nativeMap;
      nativeForEach = Array.prototype.forEach;
      nativeMap = Array.prototype.map;
  
      this.each = function (obj, iterator, context) {
        if (obj === null) {
          return;
        }
        if (nativeForEach && obj.forEach === nativeForEach) {
          obj.forEach(iterator, context);
        } else if (obj.length === +obj.length) {
          for (var i = 0, l = obj.length; i < l; i++) {
            if (iterator.call(context, obj[i], i, obj) === {}) return;
          }
        } else {
          for (var key in obj) {
            if (obj.hasOwnProperty(key)) {
              if (iterator.call(context, obj[key], key, obj) === {}) return;
            }
          }
        }
      };
  
      this.map = function(obj, iterator, context) {
        var results = [];
        // Not using strict equality so that this acts as a
        // shortcut to checking for `null` and `undefined`.
        if (obj == null) return results;
        if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
        this.each(obj, function(value, index, list) {
          results[results.length] = iterator.call(context, value, index, list);
        });
        return results;
      };
  
      if (typeof options == 'object'){
        this.hasher = options.hasher;
        this.screen_resolution = options.screen_resolution;
        this.screen_orientation = options.screen_orientation;
        this.canvas = options.canvas;
        this.ie_activex = options.ie_activex;
      } else if(typeof options == 'function'){
        this.hasher = options;
      }
    };
  
    Fingerprint.prototype = {
      get: function(){
        var keys = [];
        keys.push(navigator.userAgent);
        keys.push(navigator.language);
        keys.push(screen.colorDepth);
        if (this.screen_resolution) {
          var resolution = this.getScreenResolution();
          if (typeof resolution !== 'undefined'){ // headless browsers, such as phantomjs
            keys.push(resolution.join('x'));
          }
        }
        keys.push(new Date().getTimezoneOffset());
        keys.push(this.hasSessionStorage());
        keys.push(this.hasLocalStorage());
        keys.push(this.hasIndexDb());
        //body might not be defined at this point or removed programmatically
        if(document.body){
          keys.push(typeof(document.body.addBehavior));
        } else {
          keys.push(typeof undefined);
        }
        keys.push(typeof(window.openDatabase));
        keys.push(navigator.cpuClass);
        keys.push(navigator.platform);
        keys.push(navigator.doNotTrack);
        keys.push(this.getPluginsString());
        if(this.canvas && this.isCanvasSupported()){
          keys.push(this.getCanvasFingerprint());
        }
        if(this.hasher){
          return this.hasher(keys.join('###'), 31);
        } else {
          return this.murmurhash3_32_gc(keys.join('###'), 31);
        }
      },
  
      /**
       * JS Implementation of MurmurHash3 (r136) (as of May 20, 2011)
       *
       * @author <a href="mailto:gary.court@gmail.com">Gary Court</a>
       * @see http://github.com/garycourt/murmurhash-js
       * @author <a href="mailto:aappleby@gmail.com">Austin Appleby</a>
       * @see http://sites.google.com/site/murmurhash/
       *
       * @param {string} key ASCII only
       * @param {number} seed Positive integer only
       * @return {number} 32-bit positive integer hash
       */
  
      murmurhash3_32_gc: function(key, seed) {
        var remainder, bytes, h1, h1b, c1, c2, k1, i;
  
        remainder = key.length & 3; // key.length % 4
        bytes = key.length - remainder;
        h1 = seed;
        c1 = 0xcc9e2d51;
        c2 = 0x1b873593;
        i = 0;
  
        while (i < bytes) {
            k1 =
              ((key.charCodeAt(i) & 0xff)) |
              ((key.charCodeAt(++i) & 0xff) << 8) |
              ((key.charCodeAt(++i) & 0xff) << 16) |
              ((key.charCodeAt(++i) & 0xff) << 24);
          ++i;
  
          k1 = ((((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16))) & 0xffffffff;
          k1 = (k1 << 15) | (k1 >>> 17);
          k1 = ((((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16))) & 0xffffffff;
  
          h1 ^= k1;
              h1 = (h1 << 13) | (h1 >>> 19);
          h1b = ((((h1 & 0xffff) * 5) + ((((h1 >>> 16) * 5) & 0xffff) << 16))) & 0xffffffff;
          h1 = (((h1b & 0xffff) + 0x6b64) + ((((h1b >>> 16) + 0xe654) & 0xffff) << 16));
        }
  
        k1 = 0;
  
        switch (remainder) {
          case 3: k1 ^= (key.charCodeAt(i + 2) & 0xff) << 16;
          case 2: k1 ^= (key.charCodeAt(i + 1) & 0xff) << 8;
          case 1: k1 ^= (key.charCodeAt(i) & 0xff);
  
          k1 = (((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16)) & 0xffffffff;
          k1 = (k1 << 15) | (k1 >>> 17);
          k1 = (((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16)) & 0xffffffff;
          h1 ^= k1;
        }
  
        h1 ^= key.length;
  
        h1 ^= h1 >>> 16;
        h1 = (((h1 & 0xffff) * 0x85ebca6b) + ((((h1 >>> 16) * 0x85ebca6b) & 0xffff) << 16)) & 0xffffffff;
        h1 ^= h1 >>> 13;
        h1 = ((((h1 & 0xffff) * 0xc2b2ae35) + ((((h1 >>> 16) * 0xc2b2ae35) & 0xffff) << 16))) & 0xffffffff;
        h1 ^= h1 >>> 16;
  
        return h1 >>> 0;
      },
  
      // https://bugzilla.mozilla.org/show_bug.cgi?id=781447
      hasLocalStorage: function () {
        try{
          return !!window.localStorage;
        } catch(e) {
          return true; // SecurityError when referencing it means it exists
        }
      },
  
      hasSessionStorage: function () {
        try{
          return !!window.sessionStorage;
        } catch(e) {
          return true; // SecurityError when referencing it means it exists
        }
      },
  
      hasIndexDb: function () {
        try{
          return !!window.indexedDB;
        } catch(e) {
          return true; // SecurityError when referencing it means it exists
        }
      },
  
      isCanvasSupported: function () {
        var elem = document.createElement('canvas');
        return !!(elem.getContext && elem.getContext('2d'));
      },
  
      isIE: function () {
        if(navigator.appName === 'Microsoft Internet Explorer') {
          return true;
        } else if(navigator.appName === 'Netscape' && /Trident/.test(navigator.userAgent)){// IE 11
          return true;
        }
        return false;
      },
  
      getPluginsString: function () {
        if(this.isIE() && this.ie_activex){
          return this.getIEPluginsString();
        } else {
          return this.getRegularPluginsString();
        }
      },
  
      getRegularPluginsString: function () {
        return this.map(navigator.plugins, function (p) {
          var mimeTypes = this.map(p, function(mt){
            return [mt.type, mt.suffixes].join('~');
          }).join(',');
          return [p.name, p.description, mimeTypes].join('::');
        }, this).join(';');
      },
  
      getIEPluginsString: function () {
        if(window.ActiveXObject){
          var names = ['ShockwaveFlash.ShockwaveFlash',//flash plugin
            'AcroPDF.PDF', // Adobe PDF reader 7+
            'PDF.PdfCtrl', // Adobe PDF reader 6 and earlier, brrr
            'QuickTime.QuickTime', // QuickTime
            // 5 versions of real players
            'rmocx.RealPlayer G2 Control',
            'rmocx.RealPlayer G2 Control.1',
            'RealPlayer.RealPlayer(tm) ActiveX Control (32-bit)',
            'RealVideo.RealVideo(tm) ActiveX Control (32-bit)',
            'RealPlayer',
            'SWCtl.SWCtl', // ShockWave player
            'WMPlayer.OCX', // Windows media player
            'AgControl.AgControl', // Silverlight
            'Skype.Detection'];
  
          // starting to detect plugins in IE
          return this.map(names, function(name){
            try{
              new ActiveXObject(name);
              return name;
            } catch(e){
              return null;
            }
          }).join(';');
        } else {
          return ""; // behavior prior version 0.5.0, not breaking backwards compat.
        }
      },
  
      getScreenResolution: function () {
        var resolution;
         if(this.screen_orientation){
           resolution = (screen.height > screen.width) ? [screen.height, screen.width] : [screen.width, screen.height];
         }else{
           resolution = [screen.height, screen.width];
         }
         return resolution;
      },
  
      getCanvasFingerprint: function () {
        var canvas = document.createElement('canvas');
        var ctx = canvas.getContext('2d');
        // https://www.browserleaks.com/canvas#how-does-it-work
        var txt = 'http://valve.github.io';
        ctx.textBaseline = "top";
        ctx.font = "14px 'Arial'";
        ctx.textBaseline = "alphabetic";
        ctx.fillStyle = "#f60";
        ctx.fillRect(125,1,62,20);
        ctx.fillStyle = "#069";
        ctx.fillText(txt, 2, 15);
        ctx.fillStyle = "rgba(102, 204, 0, 0.7)";
        ctx.fillText(txt, 4, 17);
        return canvas.toDataURL();
      }
    };
  
  
    return Fingerprint;
  
  });