filtering-client-side.js

module.exports = {
	filter: function(options, expenses, cb){
		options = parseStringQuery(options);
	},
}
function runSearch(options, expenses, cb){
	var validExpenses = [];

	async.eachSeries(filterOptions, function iterator(item, callback) {
		if( runValidationSearchOnObject(options, expense) ){
			validExpenses.push( expense );
		}	
	}, function done() {
		return cb(expenses);
	});
	return options;
}

function runValidationSearchOnObject(options, expense){
	var keys = Object.keys(options);
	for (var i = keys.length - 1; i >= 0; i--) {
		var option = keys[i];
		var query  = options[ keys[i] ];
		if( option == "lt" ){
			if( expense.created_at >= query ){
				return false
			}
		}else if( option == "gt" ){
			if( expense.created_at <= query ){
				return false
			}
		}else{
			if( typeof expense[ field ] == "undefined"){
				//debug("Error invalid Field on object: " + field)
			}else if( expense[ field ] != query ){
				return false
			}
		}
		// Negative matching complete
		return true;
	};
}

function parseStringQuery(options, cb){
	options = options || {};
	if( options.string ){
		var string = options.string;

		var filterOptions = [
			['lt:', 'lt'],
			['gt:', 'gt'],
			['category:', 'category_id'],
			['account:', 'account_id']
		];

		async.eachSeries(filterOptions, function iterator(item, callback) {
			parseForAttr(string, filterOptions[0], filterOptions[1], options, function(retString, retOptions){
				string = retString;
				options = retOptions;
				callback();
			})			
		}, function done() {
			
			if( trim(string).length > 0 ){
				options.search = string;
			}

			return cb(options);
		});
	}
	return options;
}
function parseForAttr(string, filter, key, options, cb){
	var pos = string.indexOf(filter);
	if( pos !== -1 ){
		var val = string.substring( pos, string.indexOf(" ", pos) );
		string = string.replace(filter + val, "");
		options[ key ] =  val;
	}
	return cb(string, options);
}