Laravel avoid overlapping dates - laravel

Question

I am new to Laravel and am trying to implement reservation dates that can not overlap on any day.
I have a model called 'Bookings' that includes the room_id, start_date and end_date.
I have validation that checks that the end date can not be before the start:
$this->validate($request, [
'start_date' => 'required|date',
'end_date' => 'required|date|after_or_equal:start_date',
]);
However I am not sure how to check that the date range does not conflict with any other date ranges of the same room_id stored in the bookings table (as one room can not be booked twice in the same range).
Any help would be appreciated,
Thanks!

Answer 1

In a typical overlaping, given two events A and B, you have to consider four scenarios:
Event A contains event B
Event B contains event A
End date of event A overlaps with start date of event B
End date of event B overlaps with start date of event A
So, in sql to check if a room is busy in a interval of dates, lets say 2018-11-20' and '2018-11-30' it would be:
select *
from rooms
where
start_date between '2018-11-20' and '2018-11-30' or
end_date between '2018-11-20' and '2018-11-30' or
'2018-11-20' between start_date and end_date or
'2018-11-30' between start_date and end_date;
In laravel what I do is to create a scope in the model.
public function scopeByBusy($query,$start_date,$end_date)
{
return $query->whereBetween('start_date', [$start_date, $end_date])
->orWhereBetween('end_date', [$start_date, $end_date])
->orWhereRaw('? BETWEEN start_date and end_date', [$start_date])
->orWhereRaw('? BETWEEN start_date and end_date', [$end_date]);
}
Finally, I can verify if the room with the id 95 is busy between '2018-11-20' and '2018-11-30' like this:
$room_id = 95;
$start = '2018-11-20';
$end = '2018-11-30';
$exists = Rooms::where('id', $room_id)
->byBusy($start, $end)
->first();
if($exists)
{
echo "the room is busy in the interval you selected";
}
I hope it helps you.

Answer 2

I had a similar usage where i needed to check if person has already scheduled something in date range
An example laravel code below :
$start = Carbon::parse($request['start_date'])->format('Y-m-d 00:00:00');
$end = Carbon::parse($request['end_date'])->format('Y-m-d 23:59:59');
$existsActive = Microsite::where(function ($query) use ($start) {
$query->where('start_date', '<=', $start);
$query->where('end_date', '>=', $start);
})->orWhere(function ($query) use ($end) {
$query->where('start_date', '<=', $end);
$query->where('end_date', '>=', $end);
})->count();
if($existsActive > 0 ){
echo "Already exists";
}

Answer 3

There's built-in Carbon method isPast() so you can use:
$start_date->isPast()
$end_date->isPast()
You can check If both selected were booked in past.
If you haven't used Carbon this is the link:
https://carbon.nesbot.com/docs/

Answer 4

if(DB::table('rooms')->whereBetween('start_date', [$request->start_date, $request->end_date])
->orwhereBetween('end_date',[$request->start_date, $request->end_date])->exists())
{
echo "the room is busy in the interval you selected";
}

Answer 5

You have to check that in database. So you can do this:
$result = Bookings::where('start_date', '<=' $request->start_date)->where('end_date', '>=' $request->end_date)->where('room_id',$request->room_id)->first();
if(!$result){
// Code to Book room
}