A basic application that allows you to book events from different timezones

1. Get free slots for a given date and timezone in user timezone
2. Book an event
3. See all the events booked in between startDate and end Date

1. NodeJS & expressJS
2. MomentJS & Moment-timezone (for handling timezones)
3. EJS for template engine
4. Firestore for database

npm init

npm i express moment moment-timezone firebase ejs

Dev dependencies

npm i --save-dev nodemon

Default timezone : America/Los_Angeles

Default slot duration: 30 min

Default starting time for bookings: 08:00 AM

Default ending time for bookings: 05:00 PM

1. getAvailableSlots(date, timezone) --> POST localhost:5000/slots/

   This function takes date and timezone and returns all the available free slots to book an appointment.

2. addEvent(name, date, duration) --> POST localhost:5000/events/

   This functions books an appointment with given duration. The 'date' should be in ISOformat string. If the duration clashes with other slots it will return error status(422)

3. getEvents(startDate, endDate). --> POST localhost:5000/events/allevents

   This function returns all the events between startDate and endDate. The arguments should be in YYYY-MM-DD format

The firestore maintains two collections 'events' and 'slots'

1)Events (holds all the events information)

    
    Events{

      name: username,

      date: date, ---> YYYY-MM-DD format

      time: time,

      duration: duration 

    }
  
 2)Slots (holds the freeslots information)
 
 
    Slots{

      slotbox: [0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ]

    }
    
    slotbox array represents slots information for a day '0' represents free slot '1' represents booked slot
      
      Ex:   slotbox[0] ==> 08:00 AM
      
            slotbox[1] ==> 08:30 AM
            
            slotbox[17] ===> 04:30 PM
            
    This array will make checking for freeslots easier

https://appointment-booker-app.herokuapp.com/

These are the results when I don't render in the backend and send json data with res.send(jsonData)

This is to get freeSlots

This is to add event

This is to get events between startDate and endDate