Loads some data from mongodb in node and parses it a bit

work.js

function loadData(req, res, next) {
	
	/* Loads all data. */
	/*var filter = {}
	if(req.params.tag) {
		console.log("fetching data for tag: "+req.params.tag)
		filter = {"tag": req.params.tag}
	}*/
	
	WorkInstance.find({}, ['_id','tag', 'start', 'stop'], {sort:[['start', -1]]}, function(err, docs) {
		var workDatas = [];
		if (docs.length>0) {

			var cWorkData = {workData: {	_id: docs[0].doc._id, 
						tag: [docs[0].doc.tag], 
                                                start: new Date(docs[0].doc.start),
						stop: new Date(docs[0].doc.stop),
						isFinished: true
					}};
			
			for (i=1;i<docs.length;i++) {
				if (docs[i].doc.start!=undefined && docs[i].doc.stop==undefined) {
					cWorkData.workData.isFinished = false;
				}
				if (isEqual(cWorkData.workData.start, docs[i].doc.start) && isEqual(cWorkData.workData.stop, docs[i].doc.stop) 
						|| (!cWorkData.workData.isFinished && isEqual(cWorkData.workData.start, docs[i].doc.start))) {
							
					cWorkData.workData.tag.push(docs[i].doc.tag);
					
				} else {
					
					workDatas.push(cWorkData);
					var z = workDatas.length-1;

					var time = (workDatas[z].workData.stop - workDatas[z].workData.start);

					workDatas[z].workData.timeStr = timeStr(time);
					workDatas[z].workData.time = time;

					cWorkData = {workData: {_id: docs[i].doc._id, 
								tag: [docs[i].doc.tag], 
								start: new Date(docs[i].doc.start),
								stop: new Date(docs[i].doc.stop),
								isFinished: true}};

				}
			}
		}
		//needs to add remaining stuff in cWorkdata after loop
		workDatas.push(cWorkData);
		var z  = workDatas.length-1;
		var time = (workDatas[z].workData.stop - workDatas[z].workData.start);

		workDatas[z].workData.timeStr = timeStr(time);
		workDatas[z].workData.time = time;
		
		req.workDatas = workDatas;
		next();
	});
}
exports.loadData = loadData;