stagfe2/app/Http/Controllers/AppointmentController.php

<?php

namespace App\Http\Controllers;

use App\Models\Appointment;
use App\Models\BDTDevice;
use App\Models\CareMonth;
use App\Models\Client;
use App\Models\ClientInfoLine;
use App\Models\Facility;
use App\Models\NoteTemplate;
use App\Models\Pro;
use App\Models\SectionTemplate;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\File;

class AppointmentController extends Controller
{
    public function events(Request $request)
    {
        $proIds = $request->get('proIds');
        $start = $request->get('start');
        $end = $request->get('end');
        $timeZone = $request->get('timeZone');
        $appointments = Appointment
            ::whereIn('pro_id', explode(',', $proIds))
            ->where('status', '!=', 'COMPLETED')
            ->where('status', '!=', 'CANCELLED')
            ->where('start_time', '>=', $start)
            ->where('start_time', '<=', $end)
            ->get();
        $events = [];
        foreach ($appointments as $appointment) {
            $events[] = [
                "title" => '(' . $appointment->pro->initials() . ') ' . $appointment->client->displayName(),
                "appointmentUid" => $appointment->uid,
                "clientUid" => $appointment->client->uid,
                "proUid" => $appointment->pro->uid,
                "start" => $this->convertToTimezone($appointment->start_time, $timeZone),
                "end" => $this->convertToTimezone($appointment->end_time, $timeZone),
                "editable" => true
            ];
        }
        return json_encode($events);
    }

    private function convertToTimezone($_dateTime, $_targetTimezone) {
        if(!$_dateTime) return $_dateTime;
        $timezone = 'US/Eastern';
        switch($_targetTimezone) {
            case 'ALASKA':
                $timezone = "US/Alaska";
                break;
            case 'CENTRAL':
                $timezone = "US/Central";
                break;
            case 'HAWAII':
                $timezone = "US/Hawaii";
                break;
            case 'MOUNTAIN':
                $timezone = "US/Mountain";
                break;
            case 'PACIFIC':
                $timezone = "US/Pacific";
                break;
            case 'PUERTO_RICO':
                $timezone = "America/Puerto_Rico";
                break;
            default:
                $timezone = "US/Eastern";
                break;
        }

        $date = new \DateTime($_dateTime, new \DateTimeZone("UTC"));
        $date->setTimezone(new \DateTimeZone($timezone));
        return $date->format('Y-m-d H:i:s');
    }
}