wages-ws/web_services.js

This server read data from a cassandra DB and provide services for MyWagesApp

var express = require('express');
var app = express();
var cassandra = require('cassandra-driver');
var async = require('async');
var dateFormat = require('dateformat');


var client = new cassandra.Client({ contactPoints: ['10.226.112.47'], keyspace: 'wfm' });

  client.connect(function (err) {
    if (err) {

      return console.error('There was an error when connecting', err);
    }

    console.log('Connected to cluster with %d host(s): %j', client.hosts.length, client.hosts.keys());
    console.log('Keyspaces: %j', Object.keys(client.metadata.keyspaces));
  });

// WOSH WEB SERVICE
app.get('/WOSH_service/store_nbr/:store_nbr', function (req, res) {

  console.log("Received a GET WOSH request");
  var storeNbr = req.params.store_nbr;
  var now = new Date();
  var dateToday = dateFormat(now, "yyyy-mm-dd");
  var subtractedSaturday;
  //case stmts for how far away saturday is -4,-3,-2
 var dayNumber = now.getDate(); //0-31
 var weekday = now.getDay();
 //what if the dayNumber is less than 
 switch(weekday){
   case 0:
        subtractedSaturday = new Date(new Date().setDate(new Date().getDate()-1));
        break;
   case 1:
        subtractedSaturday = new Date(new Date().setDate(new Date().getDate()-2));
        break;
    case 2:
        subtractedSaturday = new Date(new Date().setDate(new Date().getDate()-3));
        break;
   case 3:
        subtractedSaturday = new Date(new Date().setDate(new Date().getDate()-4));
        break;
    case 4:
        subtractedSaturday = new Date(new Date().setDate(new Date().getDate()-5));
        break;
   case 5:
        subtractedSaturday = new Date(new Date().setDate(new Date().getDate()-6));
        break;
   case 6:
        subtractedSaturday = now;
        break;
   default:
        console.log("MAJOR ERROR: SOMETHING IS UP WITH THE DATE NUMBER");
        break;             
 }
 
 var dateSaturday = dateFormat(subtractedSaturday, "yyyy-mm-dd");
  console.log("subtractedSaturday is" + subtractedSaturday);
  console.log("formatted saturday is" + dateSaturday);
  
  client.execute('SELECT win,hours_worked FROM wfm.punch WHERE store_nbr=?  AND punch_date<=? AND punch_date >= ?',[storeNbr, dateToday, dateSaturday],{prepare:true}, function (err, result) {
    if (err) {
      return console.error('There was an errorwhile trying to retrieve data from system.local', err);
    }
    
    //get everything up to saturday
    
    var row = result.rows;
    var jsonData = [];  

    for(i = 0; i < row.length; i++){
      //get the win number and hours worked
      console.log("Win number is ", row[i].win);
      console.log("Hours_worked "+ row[i].hours_worked);
      var tempRow = row[i];
      var tempWin = row[i].win;
      var tempHrsWkd = row[i].hours_worked;
      var winExists= 0;
      if(i==0){
        jsonData.push(tempRow);
      }else{
        for(x = 0 ; x < jsonData.length; x++ ){
           //check if the win number has already been added
          //if it has already been added add the work hours and 
          if(tempWin==jsonData[x].win){
            //add worked hours
            jsonData[x].hours_worked += tempHrsWkd;
            winExists=1;
            break;
            
          }
        }
        if(!winExists){
          jsonData.push(tempRow);
        }
      }  
    }
    //var wins = result.rows.win;
    console.log("JSON DATA");
    console.log(jsonData);
    res.send(jsonData);
  });
})

/*-------------------------------------------------------------------------------------*/
//PUNCH DATA BY STORE NUMBER AND DATE WEB SERVICE
app.get('/PD_ClockedIn/store_nbr/:store_nbr', function (req, res) {


  console.log("Received a GET PunchData request by STORE NUMBER");
  var storeNbr = req.params.store_nbr;
  var now = new Date();
  
  var dateToday = dateFormat(now, "yyyy-mm-dd");
  
  client.execute('SELECT win FROM wfm.punch_clockin WHERE store_nbr=?  AND punch_date=?',[storeNbr, dateToday], {prepare : true}, function (err, result) {
    if (err) {
      return console.error('There was while trying to retrieve data from system.local', err);
    }
    var row = result.rows;
    console.log('Obtained row: ', row);
    res.send(row);
    console.log('THE STORE NUMBER THAT WAS INPUT IS: '+storeNbr);
    console.log("THE DATE IS "+now);
    console.log("THE REGULAR DATE IS " + dateToday);
    
  }); 
})

//PUNCH DATA CURRENT STATUS IS WORKING WEB SERVICE
app.get('/PD_ClockedIn', function (req, res) {

  console.log("Received a GET PunchData request for CURRENT STATUS");
  var date = new Date();
  
  var dateToday = dateFormat(date, "yyyy-mm-dd");
  client.execute('SELECT win FROM wfm.punch_clockin WHERE punch_date = ? allow filtering;',[dateToday], {prepare : true}, function (err, result) {
    if (err) {
      return console.error('There was while trying to retrieve data from system.local', err);
    }
    var row = result.rows;
    console.log('Obtained row: ', row);
    console.log("todays date" + dateToday);
    res.send(row);
  }); 
})

//PUNCH DATA CURRENT STATUS IS LUNCH WEB SERVICE
app.get('/PD_MealBreak/store_nbr/:store_nbr', function (req, res) {

  console.log("Received a GET PunchData request for CURRENT STATUS");
  var storeNbr = req.params.store_nbr;
  var date = new Date();
  var dateToday = dateFormat(date, "yyyy-mm-dd");
  
  client.execute('SELECT win FROM wfm.punch_meal WHERE store_nbr=? AND punch_date = ? allow filtering;',[storeNbr, dateToday], {prepare : true}, function (err, result) {
    if (err) {
      return console.error('There was while trying to retrieve data from system.local', err);
    }
    var row = result.rows;
    console.log('Obtained row: ', row);
    console.log("todays date" + dateToday);
    res.send(row);
  }); 
})

/*-------------------------------------------------------------------------------------*/

//OVER TIME WEB SERVICE
app.get('/Overtime_service/id/:id/text/:text', function (req, res) {

  console.log("Received a GET OverTime request");
  var idInput = req.params.id;
  var textInput = req.params.text;

  client.execute('SELECT * FROM wfm.test WHERE id=?  AND text=?',[idInput, textInput],{prepare:true}, function (err, result) {
    if (err) {
      return console.error('There was while trying to retrieve data from system.local', err);
    }
    var row = result.rows;
    console.log('Obtained row: ', row);
    res.send(row);

  }); 

})

/*-------------------------------------------------------------------------------------*/

// This responds a POST request for the homepage
app.post('/', function (req, res) {
  console.log("Got a POST request for the homepage");
  res.send('Hello POST');
})

// This responds a DELETE request for the /del_user page.
app.delete('/del_user', function (req, res) {
  console.log("Got a DELETE request for /del_user");
  res.send('Hello DELETE');
})

// This responds a GET request for the /list_user page.
app.get('/list_user', function (req, res) {
  console.log("Got a GET request for /list_user");
  res.send('Page Listing');
})

// This responds a GET request for abcd, abxcd, ab123cd, and so on
app.get('/ab*cd', function (req, res) {
  console.log("Got a GET request for /ab*cd");
  res.send('Page Pattern Match');
})


var server = app.listen(8080, function () {

  var host = server.address().address
  var port = server.address().port

  console.log("Example app listening at http://%s:%s", host, port)

})