Recursion through a Cheerio.js object and writing to .CSV

parse_gist.js

/*An object created to parse through a large number of HTML
  blocks quickly. Used with cheerio.js. Begin via:
    parse.run($('some-div')[0])
*/

var fs = require('fs'),
  cheerio = require('cheerio');

var Parse = function(block) {
  this.block = {}; //top level node
  this.depth = 0; //number of 1st gen
  this.stats = []; //array to push successful parses
  
};

Parse.prototype = {
  run: function(block) {
    this.block = block; //top level node
    this.depth = block.children.length; //number of 1st gen
    this.stats = []; //array to push successful parses

    //begin
    this.parseRecursion(this.block);
  },
  parseRecursion: function(node) {

    var nodes;
    nodes = node.children;
    this.parseLoopAllChildren(nodes);

    if (this.depth === 0) {
      this.outputParse();
    }
  },
  parseLoopAllChildren: function(nodes) {
    if(nodes) {
      var node;
      for (var obj in nodes) {
        node = nodes[obj];

        //If || Switch blocks here depending on what you
        //are parsing for.
        if (node.type == 'text') {
          this.cleanLine(node.data);
        }

        //Continue recursion on node if more children nodes
        if (node.children) {
          this.parseRecursion(node);
        }

        //If the nodes parent is top level, node complete
        if(node.parent == this.block) {
          this.depth--;
        }
      }
    }
  },

  //Output and cleaning functions
  outputParse: function() {
    //Output function will vary depending on parsing goals
    var result = [];
      for (var i = 0; i < this.stats.length; i++) {
        switch(this.stats[i]) {
          case 'First Name':
            result[0] = (this.cleanComma(this.stats[i + 2]));
            break;
          case 'Last Name:':
            result[1] = (this.cleanComma(this.stats[i + 1]));
            break;
          case 'Email:':
            result[6] = (this.cleanComma(this.stats[i + 1]));
            break;
          case 'Website:':
            result[7] = (this.cleanComma(this.stats[i + 1]));
            break;
        }
      }

    fs.appendFile('test.csv', this.num + ', ' + result.join(', ') + '\n', function(err) {
      if (err) throw err;
    });

  },
  cleanComma: function(str) {
      return (str) ? str.replace(',', ' ') : str;
  },
  cleanLine: function(line) {
    if (line[0] != '\r' && line[0] != ' ') {
      this.stats.push(line);
    } else {
      var newLine = '';
      for (var i = 0; i < line.length; i++) {
        if (line[i] != '\r' && line[i] != '\n' && line[i] != '\t' && line[i] != ' ' && line[i] != String.fromCharCode(0xC2)) {
          newLine += line[i];
        }
      }
      if (newLine !== '') {
        this.stats.push(newLine);
      }
    }
  }
};

module.exports = Parse;