Web Analytics Tool - Server API Endpoint Calculations - Requests from Dashboard to Server and Tracked Website To Server

dashboardToServer.js

/*
* GET /get-metric
* is the API endpoint for requesting data 
* from DashBoard to the Server 
*/
app.get("/get-metric", async (req, res) => 
{
  // create parameters for MongoDB aggregation pipeline for 
  // reducing the lines of code
  const aggrParams = createAggrParams(metricname, timezone);

  // Filter the large DB with Date Range and URL Path 
  // Record is the Mongoose Model name
  // This is the $match stage of the pipeline
  const aggrMatch = matchWithDateAndPath(timestringi, timestringf, visitedurl, Record);

  // This is the $group and $project stage of the Pipeline
  // Here we use the Parameters created initially
  const aggrProject = await groupAndProject(aggrMatch, aggrParams);

  // X and Y axes of the Graph to be presented on the Dashboard
  // are returned here
  const result = getAxes(metricname, timestringi, timestringf, aggrProject);

  // Labels of the Graph to be presented on the Dashboard
  // are returned here
  const yLabels = getYLabels(metricname);

  // Labels are inserted in the correct spot of the JS Object 'result'
  result["yaxis"]["visitorCount"]["ylabel"] = yLabels["visitorCountYLabel"];
  result["yaxis"]["avgTime"]["ylabel"] = yLabels["avgTimeYLabel"];

  // 'result' object is then sent to the Dashboard
  // after converting to JSON
  res.json(result);
}

trackedWebsiteToServer.js

/*
* POST /save-session-data
* is the API endpoint for collecting data 
* from Tracked Website to the Server
*/
app.post("/save-session-data", async (req, res) => {
  try {
    
    // Data collected from the Tracked Website 
    // is stored in 'received'
    const received = req.body;
    
    // Creating a document from the received data
    const doc = new Record(received);
    
    // Received Object is attempted to be stored in the DB
    // as it is. If there is validation error, then control
    // moves to 'catch' and data is not saved in DB.
    // Otherwise it is stored as is.
    const saved = await doc.save();
    
    // Success message is sent if there are no errors
    console.log(saved);
    res.json("Got Data!🎉");
  }
  
  catch(err) {    
  
    // Error message is sent on validation errors
    console.error(err["message"]);
    res.json("Error Tracking!😁");
  
  }
});