htm-to-json/htm-to-json.js

to convert html string to json file , and also get data through tag name ,tag id and attribute value.

//to define constructor
function htmlToJson()
{
};
//to implement method properties 
htmlToJson.prototype.convert_html_to_json = function(htmlStr,callback)
{
	try{
	var jsn = {};
	var len = htmlStr.length || 0;
	var str = htmlStr || "";
	var pos = 0;
	for(var j=pos;j<len;j++)
	{
		if(str.charAt(j) == '<' && str.charAt(j+1) !='/' && str.charAt(j+1) !='!')
		{
			var tagLine = "";
			for(var k=++j;k<len;k++)
			{
				if(str.charAt(k) == ">")
				{
					//console.log(tagLine);
					var _tagNameList = tagLine && tagLine.trim().split(' ');
					var _tagRootName = _tagNameList[0] ,_tagValue = "";
					if(!jsn.hasOwnProperty(_tagRootName))
						jsn[_tagRootName] = [];
					if(_tagNameList.length>1)
					{
						var _tagAttr = _tagNameList.slice(1,_tagNameList.length);
						var _tagAttrStr = _tagAttr.join(' ');
						var _tagAttrJsn = {},tokenId = "",tokenVal = "";
						//console.log(_tagAttrStr);
						for(var s=0;s<_tagAttrStr.length;s++)
						{
							if(_tagAttrStr.charAt(s) != " " && _tagAttrStr.charAt(s) != "=")
								tokenId += _tagAttrStr.charAt(s);
							if(_tagAttrStr.charAt(s) == "=")
							{
								var _checkAttrEnd = "";
								for(var p = ++s;p<_tagAttrStr.length;p++)
								{
									if(p == s)
									{
										var _trimStr = _tagAttrStr.substring(p,_tagAttrStr.length);
										_trimStr = _trimStr && _trimStr.trim();
										if(_trimStr.charAt(0) == "'")
											_checkAttrEnd = "'";
										else if(_trimStr.charAt(0) == '"')
											_checkAttrEnd = '"';
										else
											_checkAttrEnd = " ";
											
									}
									
									if(_tagAttrStr.charAt(p) != "'" && _tagAttrStr.charAt(p) != '"' && _tagAttrStr.charAt(p) != _checkAttrEnd)
									{
										tokenVal += _tagAttrStr.charAt(p);
									}
									
									if((tokenVal.length != 0 && _tagAttrStr.charAt(p) == _checkAttrEnd) || p == _tagAttrStr.length-1)
									{
										_tagAttrJsn[tokenId] = tokenVal;
										tokenId = "";
										tokenVal = "";
										s = p;
										break;
									}
								}
							}
						}
						//get innerHTML
						if(_tagRootName && _tagRootName.trim() != "script" && _tagRootName.trim() != "style")
							for(var v = k+1;v<len;v++)
							{
								if(str.charAt(v) == "<")
								{
									if(_tagValue.length != 0)
										_tagAttrJsn['innerHTML']=_tagValue;
									v = len;
								}
								else
									_tagValue += str.charAt(v);
							}
						jsn[_tagRootName].push(_tagAttrJsn);
						break;
					}
					else
					{
						//get innerHTML
						if(_tagRootName && _tagRootName.trim() != "script" && _tagRootName.trim() != "style")
						for(var v = k+1;v<len;v++)
						{
							if(str.charAt(v) == "<")
							{
								if(_tagValue.length != 0)
								{
									if(jsn[_tagRootName].length != 0)
										jsn[_tagRootName][jsn[_tagRootName].length-1]['innerHTML'] = _tagValue;
									else
										jsn[_tagRootName].push({'innerHTML' : _tagValue});
								}
								v = len;
							}
							else
								_tagValue += str.charAt(v);
						}
						j=k;
						break;
					}
					
				}
				else
				{
					tagLine += str.charAt(k);
				}
			}			
		}
	}
	callback(null,jsn);
	}catch(err)
	{
		callback(err,null);
	}
};
//to get data by using tag property id
htmlToJson.prototype.get_data_by_id = function(jsonData,id,callback)
{
	if(id == "" || id == null || id.length == 0 || id == undefined)
		return "";
	if(jsonData == "")
		return "";
	var data = [];
	for(var key in jsonData)
	{
		for(var i=0;i<jsonData[key].length;i++)
		{
			if(jsonData[key][i].hasOwnProperty('id') || jsonData[key][i].hasOwnProperty('Id') || jsonData[key][i].hasOwnProperty('ID'))
			{
				if(jsonData[key][i]['id'] == id)
					data.push(jsonData[key][i]);
				else if(jsonData[key][i]['Id'] == id)
					data.push(jsonData[key][i]);
				else if(jsonData[key][i]['ID'] == id)
					data.push(jsonData[key][i]);
			}
		}
	}
	callback(null,data);
	
};
//to get data by using tag name
htmlToJson.prototype.get_data_by_tag = function(jsonData,TagName,callback)
{
	if(TagName == "" || TagName == null || TagName.length == 0 || TagName == undefined)
		return "";
	if(jsonData == "")
		return "";
	var data = [];
	for(var key in jsonData)
	{
		if(key == TagName)
			data = jsonData[key];
	}
	callback(null,data);
	
};
//to get json data by using attribute value
htmlToJson.prototype.get_data_by_attr_val = function(jsonData,attrName,callback)
{
	if(attrName == "" || attrName == null || attrName.length == 0 || attrName == undefined)
		return "";
	if(jsonData == "")
		return "";
	var data = [];
	attrName = attrName.trim();
	for(var key in jsonData)
	{
		for(var i=0;i<jsonData[key].length;i++)
		{
			for(var nkey in jsonData[key][i])
			{
				if(jsonData[key][i][nkey] && jsonData[key][i][nkey].trim() == attrName)
				{
					data.push(jsonData[key][i]);
				}
			}
		}
	}
	callback(null,data);
};

module.exports = new htmlToJson();