Laravel group by date and count - laravel

Question

I'm trying to add extra information to a Laravel eloquent collection based on the counting number of start(date) field. so the scenario is I have an "appointments" table, I want to add extra attributes to the object in the collection that's returned by eloquent if any days have more than 10 appointments. I have tried many ways like group by and count but didn't work. anyway I have the code below that's I think I'm so close to it but I have been working on it but couldn't find how to make it achieve what I want. I think I'm stuck and I can't think any more. I have commented most of the lines.
$allAppointments = Appointment::get($columns); //returning all the appointments
$days = Appointment::get()->groupBy(function ($val) {
return Carbon::parse($val->start)->format('d');
}); //here I'm returning appointments by group without the count
$counter = [];
foreach ($days as $day => $appointments) {
foreach ($appointments as $appointment) {
if (Carbon::parse($appointment->start)->format('d') == $day) {
$counter = [Carbon::parse($appointment->start)->format('d') => $day]; //here I'm trying to make an array and count the days but not working
}
dd($counter);
foreach ($allAppointments as $allAppointment) {
if (Carbon::parse($allAppointment->start)->format('d') == $day && count($counter) == 10) //here I want to compare the dates and check if that day have more than 10 appointments
$allAppointment->setAttribute('backgroundColor', 'red'); //here I want to add the extra information
}
}
}

Answer 1

Try the following:
Appointment::select(DB::raw('if(count(*) > 10, true, false) as more_than_ten_appointment'))->groupBy(function ($val) {
return Carbon::parse($val->start)->format('d');
})->get();
if DB class isn't exist add after namespace:
use DB;

Answer 2

It's strange after working on it more than almost 10 hours, just 20 minutes after posting it here I could make it work. the code is below:
public function all()
{
$columns = [
'id',
'title',
'start',
'end',
'note',
'allDay',
'editable',
];
$allAppointments = Appointment::get($columns);
$days = Appointment::get()
->groupBy(function ($val) {
return Carbon::parse($val->start)->format('d');
});
foreach ($days as $day => $appointments) {
foreach ($appointments as $appointment) {
foreach ($allAppointments as $key => $allAppointment) {
if (Carbon::parse($allAppointment->start)->format('d') == $day && $appointments->count() >= 10){
$allAppointment->setAttribute('backgroundColor', 'red');
}
}
}
}
return $allAppointments;
}

Answer 3

Do this
$allAppointments = Appointment::get($columns); //returning all the appointments
$days = Appointment::get()->groupBy(function ($val) {
return Carbon::parse($val->start)->format('d');
}); //returning appointments by group without the count
foreach ($days as $day => $appointments) {
foreach ($appointments as $appointment) {
$counter = 0;
if (Carbon::parse($appointment->start)->format('d') == $day) {
$counter = count($appointments); //appointments counter
}
foreach ($allAppointments as $allAppointment) {
if (Carbon::parse($allAppointment->start)->format('d') == $day && $counter >= 10) //compare the date and check if that day have more than 10 appointments
$allAppointment->setAttribute('backgroundColor', 'red'); //add the extra information here
}
}
}