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/**
 * jQuery-csv (jQuery Plugin)
 *
 * This document is licensed as free software under the terms of the
 * MIT License: http://www.opensource.org/licenses/mit-license.php
 *
 * Acknowledgements:
 * The original design and influence to implement this library as a jquery
 * plugin is influenced by jquery-json (http://code.google.com/p/jquery-json/).
 * If you're looking to use native JSON.Stringify but want additional backwards
 * compatibility for browsers that don't support it, I highly recommend you
 * check it out.
 *
 * A special thanks goes out to rwk@acm.org for providing a lot of valuable
 * feedback to the project including the core for the new FSM
 * (Finite State Machine) parsers. If you're looking for a stable TSV parser
 * be sure to take a look at jquery-tsv (http://code.google.com/p/jquery-tsv/).

* For legal purposes I'll include the "NO WARRANTY EXPRESSED OR IMPLIED.
 * USE AT YOUR OWN RISK.". Which, in 'layman's terms' means, by using this
 * library you are accepting responsibility if it breaks your code.
 *
 * Legal jargon aside, I will do my best to provide a useful and stable core
 * that can effectively be built on.
 *
 * Copyrighted 2012 by Evan Plaice.
 */

RegExp.escape= function(s) {
    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
};

(function (undefined) {
  'use strict';

var $;

// to keep backwards compatibility
  if (typeof jQuery !== 'undefined' && jQuery) {
    $ = jQuery;
  } else {
    $ = {};
  }

/**
   * jQuery.csv.defaults
   * Encapsulates the method paramater defaults for the CSV plugin module.
   */

$.csv = {
    defaults: {
      separator:',',
      delimiter:'"',
      headers:true
    },

hooks: {
      castToScalar: function(value, state) {
        var hasDot = /\./;
        if (isNaN(value)) {
          return value;
        } else {
          if (hasDot.test(value)) {
            return parseFloat(value);
          } else {
            var integer = parseInt(value);
            if(isNaN(integer)) {
              return null;
            } else {
              return integer;
            }
          }
        }
      }
    },

parsers: {
      parse: function(csv, options) {
        // cache settings
        var separator = options.separator;
        var delimiter = options.delimiter;

// set initial state if it's missing
        if(!options.state.rowNum) {
          options.state.rowNum = 1;
        }
        if(!options.state.colNum) {
          options.state.colNum = 1;
        }

// clear initial state
        var data = [];
        var entry = [];
        var state = 0;
        var value = '';
        var exit = false;

function endOfEntry() {
          // reset the state
          state = 0;
          value = '';

// if 'start' hasn't been met, don't output
          if(options.start && options.state.rowNum < options.start) {
            // update global state
            entry = [];
            options.state.rowNum++;
            options.state.colNum = 1;
            return;
          }
          
          if(options.onParseEntry === undefined) {
            // onParseEntry hook not set
            data.push(entry);
          } else {
            var hookVal = options.onParseEntry(entry, options.state); // onParseEntry Hook
            // false skips the row, configurable through a hook
            if(hookVal !== false) {
              data.push(hookVal);
            }
          }
          //console.log('entry:' + entry);
          
          // cleanup
          entry = [];

// if 'end' is met, stop parsing
          if(options.end && options.state.rowNum >= options.end) {
            exit = true;
          }
          
          // update global state
          options.state.rowNum++;
          options.state.colNum = 1;
        }

// escape regex-specific control chars
        var escSeparator = RegExp.escape(separator);
        var escDelimiter = RegExp.escape(delimiter);

// compile the regEx str using the custom delimiter/separator
        var match = /(D|S|\r\n|\n|\r|[^DS\r\n]+)/;
        var matchSrc = match.source;
        matchSrc = matchSrc.replace(/S/g, escSeparator);
        matchSrc = matchSrc.replace(/D/g, escDelimiter);
        match = new RegExp(matchSrc, 'gm');

// put on your fancy pants...
        // process control chars individually, use look-ahead on non-control chars
        csv.replace(match, function (m0) {
          if(exit) {
            return;
          }
          switch (state) {
            // the start of a value
            case 0:
              // null last value
              if (m0 === separator) {
                value += '';
                endOfValue();
                break;
              }
              // opening delimiter
              if (m0 === delimiter) {
                state = 1;
                break;
              }
              // null last value
              if (/^(\r\n|\n|\r)$/.test(m0)) {
                endOfValue();
                endOfEntry();
                break;
              }
              // un-delimited value
              value += m0;
              state = 3;
              break;

// delimited input
            case 1:
              // second delimiter? check further
              if (m0 === delimiter) {
                state = 2;
                break;
              }
              // delimited data
              value += m0;
              state = 1;
              break;

// delimiter found in delimited input
            case 2:
              // escaped delimiter?
              if (m0 === delimiter) {
                value += m0;
                state = 1;
                break;
              }
              // null value
              if (m0 === separator) {
                endOfValue();
                break;
              }
              // end of entry
              if (/^(\r\n|\n|\r)$/.test(m0)) {
                endOfValue();
                endOfEntry();
                break;
              }
              // broken paser?
              throw new Error('CSVDataError: Illegal State [Row:' + options.state.rowNum + '][Col:' + options.state.colNum + ']');

// un-delimited input
            case 3:
              // null last value
              if (m0 === separator) {
                endOfValue();
                break;
              }
              // end of entry
              if (/^(\r\n|\n|\r)$/.test(m0)) {
                endOfValue();
                endOfEntry();
                break;
              }
              if (m0 === delimiter) {
              // non-compliant data
                throw new Error('CSVDataError: Illegal Quote [Row:' + options.state.rowNum + '][Col:' + options.state.colNum + ']');
              }
              // broken parser?
              throw new Error('CSVDataError: Illegal Data [Row:' + options.state.rowNum + '][Col:' + options.state.colNum + ']');
            default:
              // shenanigans
              throw new Error('CSVDataError: Unknown State [Row:' + options.state.rowNum + '][Col:' + options.state.colNum + ']');
          }
          //console.log('val:' + m0 + ' state:' + state);
        });

// submit the last entry
        // ignore null last line
        if(entry.length !== 0) {
          endOfValue();
          endOfEntry();
        }

return data;
      },

// a csv-specific line splitter
      splitLines: function(csv, options) {
        // cache settings
        var separator = options.separator;
        var delimiter = options.delimiter;

// set initial state if it's missing
        if(!options.state.rowNum) {
          options.state.rowNum = 1;
        }

// clear initial state
        var entries = [];
        var state = 0;
        var entry = '';
        var exit = false;

// cleanup
          entry = '';

// if 'end' is met, stop parsing
          if(options.end && options.state.rowNum >= options.end) {
            exit = true;
          }
          
          // update global state
          options.state.rowNum++;
        }

// escape regex-specific control chars
        var escSeparator = RegExp.escape(separator);
        var escDelimiter = RegExp.escape(delimiter);

// compile the regEx str using the custom delimiter/separator
        var match = /(D|S|\n|\r|[^DS\r\n]+)/;
        var matchSrc = match.source;
        matchSrc = matchSrc.replace(/S/g, escSeparator);
        matchSrc = matchSrc.replace(/D/g, escDelimiter);
        match = new RegExp(matchSrc, 'gm');

// put on your fancy pants...
        // process control chars individually, use look-ahead on non-control chars
        csv.replace(match, function (m0) {
          if(exit) {
            return;
          }
          switch (state) {
            // the start of a value/entry
            case 0:
              // null value
              if (m0 === separator) {
                entry += m0;
                state = 0;
                break;
              }
              // opening delimiter
              if (m0 === delimiter) {
                entry += m0;
                state = 1;
                break;
              }
              // end of line
              if (m0 === '\n') {
                endOfLine();
                break;
              }
              // phantom carriage return
              if (/^\r$/.test(m0)) {
                break;
              }
              // un-delimit value
              entry += m0;
              state = 3;
              break;

// delimited input
            case 1:
              // second delimiter? check further
              if (m0 === delimiter) {
                entry += m0;
                state = 2;
                break;
              }
              // delimited data
              entry += m0;
              state = 1;
              break;

// delimiter found in delimited input
            case 2:
              // escaped delimiter?
              var prevChar = entry.substr(entry.length - 1);
              if (m0 === delimiter && prevChar === delimiter) {
                entry += m0;
                state = 1;
                break;
              }
              // end of value
              if (m0 === separator) {
                entry += m0;
                state = 0;
                break;
              }
              // end of line
              if (m0 === '\n') {
                endOfLine();
                break;
              }
              // phantom carriage return
              if (m0 === '\r') {
                break;
              }
              // broken paser?
              throw new Error('CSVDataError: Illegal state [Row:' + options.state.rowNum + ']');

// un-delimited input
            case 3:
              // null value
              if (m0 === separator) {
                entry += m0;
                state = 0;
                break;
              }
              // end of line
              if (m0 === '\n') {
                endOfLine();
                break;
              }
              // phantom carriage return
              if (m0 === '\r') {
                break;
              }
              // non-compliant data
              if (m0 === delimiter) {
                throw new Error('CSVDataError: Illegal quote [Row:' + options.state.rowNum + ']');
              }
              // broken parser?
              throw new Error('CSVDataError: Illegal state [Row:' + options.state.rowNum + ']');
            default:
              // shenanigans
              throw new Error('CSVDataError: Unknown state [Row:' + options.state.rowNum + ']');
          }
          //console.log('val:' + m0 + ' state:' + state);
        });

// submit the last entry
        // ignore null last line
        if(entry !== '') {
          endOfLine();
        }

return entries;
      },

// a csv entry parser
      parseEntry: function(csv, options) {
        // cache settings
        var separator = options.separator;
        var delimiter = options.delimiter;
        
        // set initial state if it's missing
        if(!options.state.rowNum) {
          options.state.rowNum = 1;
        }
        if(!options.state.colNum) {
          options.state.colNum = 1;
        }

// clear initial state
        var entry = [];
        var state = 0;
        var value = '';

// checked for a cached regEx first
        if(!options.match) {
          // escape regex-specific control chars
          var escSeparator = RegExp.escape(separator);
          var escDelimiter = RegExp.escape(delimiter);
          
          // compile the regEx str using the custom delimiter/separator
          var match = /(D|S|\n|\r|[^DS\r\n]+)/;
          var matchSrc = match.source;
          matchSrc = matchSrc.replace(/S/g, escSeparator);
          matchSrc = matchSrc.replace(/D/g, escDelimiter);
          options.match = new RegExp(matchSrc, 'gm');
        }

// put on your fancy pants...
        // process control chars individually, use look-ahead on non-control chars
        csv.replace(options.match, function (m0) {
          switch (state) {
            // the start of a value
            case 0:
              // null last value
              if (m0 === separator) {
                value += '';
                endOfValue();
                break;
              }
              // opening delimiter
              if (m0 === delimiter) {
                state = 1;
                break;
              }
              // skip un-delimited new-lines
              if (m0 === '\n' || m0 === '\r') {
                break;
              }
              // un-delimited value
              value += m0;
              state = 3;
              break;

// delimiter found in delimited input
            case 2:
              // escaped delimiter?
              if (m0 === delimiter) {
                value += m0;
                state = 1;
                break;
              }
              // null value
              if (m0 === separator) {
                endOfValue();
                break;
              }
              // skip un-delimited new-lines
              if (m0 === '\n' || m0 === '\r') {
                break;
              }
              // broken paser?
              throw new Error('CSVDataError: Illegal State [Row:' + options.state.rowNum + '][Col:' + options.state.colNum + ']');

// un-delimited input
            case 3:
              // null last value
              if (m0 === separator) {
                endOfValue();
                break;
              }
              // skip un-delimited new-lines
              if (m0 === '\n' || m0 === '\r') {
                break;
              }
              // non-compliant data
              if (m0 === delimiter) {
                throw new Error('CSVDataError: Illegal Quote [Row:' + options.state.rowNum + '][Col:' + options.state.colNum + ']');
              }
              // broken parser?
              throw new Error('CSVDataError: Illegal Data [Row:' + options.state.rowNum + '][Col:' + options.state.colNum + ']');
            default:
              // shenanigans
              throw new Error('CSVDataError: Unknown State [Row:' + options.state.rowNum + '][Col:' + options.state.colNum + ']');
          }
          //console.log('val:' + m0 + ' state:' + state);
        });

// submit the last value
        endOfValue();

return entry;
      }
    },

helpers: {

/**
       * $.csv.helpers.collectPropertyNames(objectsArray)
       * Collects all unique property names from all passed objects.
       *
       * @param {Array} objects Objects to collect properties from.
       *
       * Returns an array of property names (array will be empty,
       * if objects have no own properties).
       */
      collectPropertyNames: function (objects) {

var o, propName, props = [];
        for (o in objects) {
          for (propName in objects[o]) {
            if ((objects[o].hasOwnProperty(propName)) &&
                (props.indexOf(propName) < 0) && 
                (typeof objects[o][propName] !== 'function')) {

props.push(propName);
            }
          }
        }
        return props;
      }
    },

/**
     * $.csv.toArray(csv)
     * Converts a CSV entry string to a javascript array.
     *
     * @param {Array} csv The string containing the CSV data.
     * @param {Object} [options] An object containing user-defined options.
     * @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
     * @param {Character} [delimiter] An override for the delimiter character. Defaults to a double-quote(").
     *
     * This method deals with simple CSV strings only. It's useful if you only
     * need to parse a single entry. If you need to parse more than one line,
     * use $.csv2Array instead.
     */
    toArray: function(csv, options, callback) {
      options = (options !== undefined ? options : {});
      var config = {};
      config.callback = ((callback !== undefined && typeof(callback) === 'function') ? callback : false);
      config.separator = 'separator' in options ? options.separator : $.csv.defaults.separator;
      config.delimiter = 'delimiter' in options ? options.delimiter : $.csv.defaults.delimiter;
      var state = (options.state !== undefined ? options.state : {});

// setup
      options = {
        delimiter: config.delimiter,
        separator: config.separator,
        onParseEntry: options.onParseEntry,
        onParseValue: options.onParseValue,
        state: state
      };

var entry = $.csv.parsers.parseEntry(csv, options);

// push the value to a callback if one is defined
      if(!config.callback) {
        return entry;
      } else {
        config.callback('', entry);
      }
    },

/**
     * $.csv.toArrays(csv)
     * Converts a CSV string to a javascript array.
     *
     * @param {String} csv The string containing the raw CSV data.
     * @param {Object} [options] An object containing user-defined options.
     * @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
     * @param {Character} [delimiter] An override for the delimiter character. Defaults to a double-quote(").
     *
     * This method deals with multi-line CSV. The breakdown is simple. The first
     * dimension of the array represents the line (or entry/row) while the second
     * dimension contains the values (or values/columns).
     */
    toArrays: function(csv, options, callback) {
      options = (options !== undefined ? options : {});
      var config = {};
      config.callback = ((callback !== undefined && typeof(callback) === 'function') ? callback : false);
      config.separator = 'separator' in options ? options.separator : $.csv.defaults.separator;
      config.delimiter = 'delimiter' in options ? options.delimiter : $.csv.defaults.delimiter;

// setup
      var data = [];
      options = {
        delimiter: config.delimiter,
        separator: config.separator,
        onPreParse: options.onPreParse,
        onParseEntry: options.onParseEntry,
        onParseValue: options.onParseValue,
        onPostParse: options.onPostParse,
        start: options.start,
        end: options.end,
        state: {
          rowNum: 1,
          colNum: 1
        }
      };

// onPreParse hook
      if(options.onPreParse !== undefined) {
        options.onPreParse(csv, options.state);
      }

// parse the data
      data = $.csv.parsers.parse(csv, options);

// onPostParse hook
      if(options.onPostParse !== undefined) {
        options.onPostParse(data, options.state);
      }

// push the value to a callback if one is defined
      if(!config.callback) {
        return data;
      } else {
        config.callback('', data);
      }
    },

/**
     * $.csv.toObjects(csv)
     * Converts a CSV string to a javascript object.
     * @param {String} csv The string containing the raw CSV data.
     * @param {Object} [options] An object containing user-defined options.
     * @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
     * @param {Character} [delimiter] An override for the delimiter character. Defaults to a double-quote(").
     * @param {Boolean} [headers] Indicates whether the data contains a header line. Defaults to true.
     *
     * This method deals with multi-line CSV strings. Where the headers line is
     * used as the key for each value per entry.
     */
    toObjects: function(csv, options, callback) {
      options = (options !== undefined ? options : {});
      var config = {};
      config.callback = ((callback !== undefined && typeof(callback) === 'function') ? callback : false);
      config.separator = 'separator' in options ? options.separator : $.csv.defaults.separator;
      config.delimiter = 'delimiter' in options ? options.delimiter : $.csv.defaults.delimiter;
      config.headers = 'headers' in options ? options.headers : $.csv.defaults.headers;
      options.start = 'start' in options ? options.start : 1;
      
      // account for headers
      if(config.headers) {
        options.start++;
      }
      if(options.end && config.headers) {
        options.end++;
      }

// setup
      var lines = [];
      var data = [];

options = {
        delimiter: config.delimiter,
        separator: config.separator,
        onPreParse: options.onPreParse,
        onParseEntry: options.onParseEntry,
        onParseValue: options.onParseValue,
        onPostParse: options.onPostParse,
        start: options.start,
        end: options.end,
        state: {
          rowNum: 1,
          colNum: 1
        },
        match: false,
        transform: options.transform
      };

// fetch the headers
      var headerOptions = {
        delimiter: config.delimiter,
        separator: config.separator,
        start: 1,
        end: 1,
        state: {
          rowNum:1,
          colNum:1
        }
      };

// onPreParse hook
      if(options.onPreParse !== undefined) {
        options.onPreParse(csv, options.state);
      }

// parse the csv
      var headerLine = $.csv.parsers.splitLines(csv, headerOptions);
      var headers = $.csv.toArray(headerLine[0], options);

// fetch the data
      lines = $.csv.parsers.splitLines(csv, options);

// reset the state for re-use
      options.state.colNum = 1;
      if(headers){
        options.state.rowNum = 2;
      } else {
        options.state.rowNum = 1;
      }
      
      // convert data to objects
      for(var i=0, len=lines.length; i<len; i++) {
        var entry = $.csv.toArray(lines[i], options);
        var object = {};
        for(var j=0; j <headers.length; j++) {
          object[headers[j]] = entry[j];
        }
        if (options.transform !== undefined) {
          data.push(options.transform.call(undefined, object));
        } else {
          data.push(object);
        }
        
        // update row state
        options.state.rowNum++;
      }

// onPostParse hook
      if(options.onPostParse !== undefined) {
        options.onPostParse(data, options.state);
      }

// push the value to a callback if one is defined
      if(!config.callback) {
        return data;
      } else {
        config.callback('', data);
      }
    },

/**
     * $.csv.fromArrays(arrays)
     * Converts a javascript array to a CSV String.
     *
     * @param {Array} arrays An array containing an array of CSV entries.
     * @param {Object} [options] An object containing user-defined options.
     * @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
     * @param {Character} [delimiter] An override for the delimiter character. Defaults to a double-quote(").
     *
     * This method generates a CSV file from an array of arrays (representing entries).
     */
    fromArrays: function(arrays, options, callback) {
      options = (options !== undefined ? options : {});
      var config = {};
      config.callback = ((callback !== undefined && typeof(callback) === 'function') ? callback : false);
      config.separator = 'separator' in options ? options.separator : $.csv.defaults.separator;
      config.delimiter = 'delimiter' in options ? options.delimiter : $.csv.defaults.delimiter;

var output = '',
          line,
          lineValues,
          i, j;

for (i = 0; i < arrays.length; i++) {
        line = arrays[i];
        lineValues = [];
        for (j = 0; j < line.length; j++) {
          var strValue = (line[j] === undefined || line[j] === null) ? '' : line[j].toString();
          if (strValue.indexOf(config.delimiter) > -1) {
            strValue = strValue.replace(config.delimiter, config.delimiter + config.delimiter);
          }

var escMatcher = '\n|\r|S|D';
          escMatcher = escMatcher.replace('S', config.separator);
          escMatcher = escMatcher.replace('D', config.delimiter);

if (strValue.search(escMatcher) > -1) {
            strValue = config.delimiter + strValue + config.delimiter;
          }
          lineValues.push(strValue);
        }
        output += lineValues.join(config.separator) + '\r\n';
      }

// push the value to a callback if one is defined
      if(!config.callback) {
        return output;
      } else {
        config.callback('', output);
      }
    },

/**
     * $.csv.fromObjects(objects)
     * Converts a javascript dictionary to a CSV string.
     *
     * @param {Object} objects An array of objects containing the data.
     * @param {Object} [options] An object containing user-defined options.
     * @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
     * @param {Character} [delimiter] An override for the delimiter character. Defaults to a double-quote(").
     * @param {Character} [sortOrder] Sort order of columns (named after
     *   object properties). Use 'alpha' for alphabetic. Default is 'declare',
     *   which means, that properties will _probably_ appear in order they were
     *   declared for the object. But without any guarantee.
     * @param {Character or Array} [manualOrder] Manually order columns. May be
     * a strin in a same csv format as an output or an array of header names
     * (array items won't be parsed). All the properties, not present in
     * `manualOrder` will be appended to the end in accordance with `sortOrder`
     * option. So the `manualOrder` always takes preference, if present.
     *
     * This method generates a CSV file from an array of objects (name:value pairs).
     * It starts by detecting the headers and adding them as the first line of
     * the CSV file, followed by a structured dump of the data.
     */
    fromObjects: function(objects, options, callback) {
      options = (options !== undefined ? options : {});
      var config = {};
      config.callback = ((callback !== undefined && typeof(callback) === 'function') ? callback : false);
      config.separator = 'separator' in options ? options.separator : $.csv.defaults.separator;
      config.delimiter = 'delimiter' in options ? options.delimiter : $.csv.defaults.delimiter;
      config.headers = 'headers' in options ? options.headers : $.csv.defaults.headers;
      config.sortOrder = 'sortOrder' in options ? options.sortOrder : 'declare';
      config.manualOrder = 'manualOrder' in options ? options.manualOrder : [];
      config.transform = options.transform;

if (typeof config.manualOrder === 'string') {
        config.manualOrder = $.csv.toArray(config.manualOrder, config);
      }

if (config.transform !== undefined) {
        var origObjects = objects;
        objects = [];

var i;
        for (i = 0; i < origObjects.length; i++) {
          objects.push(config.transform.call(undefined, origObjects[i]));
        }
      }

var props = $.csv.helpers.collectPropertyNames(objects);

if (config.sortOrder === 'alpha') {
        props.sort();
      } // else {} - nothing to do for 'declare' order

if (config.manualOrder.length > 0) {

var propsManual = [].concat(config.manualOrder);
        var p;
        for (p = 0; p < props.length; p++) {
          if (propsManual.indexOf( props[p] ) < 0) {
            propsManual.push( props[p] );
          }
        }
        props = propsManual;
      }

var o, p, line, output = [], propName;
      if (config.headers) {
        output.push(props);
      }

for (o = 0; o < objects.length; o++) {
        line = [];
        for (p = 0; p < props.length; p++) {
          propName = props[p];
          if (propName in objects[o] && typeof objects[o][propName] !== 'function') {
            line.push(objects[o][propName]);
          } else {
            line.push('');
          }
        }
        output.push(line);
      }

// push the value to a callback if one is defined
      return $.csv.fromArrays(output, options, config.callback);
    }
  };

// Maintenance code to maintain backward-compatibility
  // Will be removed in release 1.0
  $.csvEntry2Array = $.csv.toArray;
  $.csv2Array = $.csv.toArrays;
  $.csv2Dictionary = $.csv.toObjects;

// CommonJS module is defined
  if (typeof module !== 'undefined' && module.exports) {
    module.exports = $.csv;
  }

}).call( this );