jandl-taskmanager-app/be/app/Services/Karat/KaratService.php

<?php

namespace App\Services\Karat;

use App\Models\User;
use Illuminate\Support\Arr;
use Illuminate\Support\Collection;

class KaratService
{
    private Api $api;

    public function __construct()
    {
        $this->api = new Api();
    }

    public function syncUsers()
    {
        $karatUsers = \App\Services\Karat\User::all();
        $dbUsers =  User::all();

        $this->insertUsersFromKarat($karatUsers, $dbUsers);

        $this->removeUsersThatAreNotInKaratAnymore($karatUsers, $dbUsers);
    }

    private function insertUsersFromKarat(Collection $karatUsers, Collection $dbUsers)
    {
        $emailsToSkip = $dbUsers->pluck('email' )->intersect( $karatUsers->pluck('email'));

        $karatUsersToInsert = $karatUsers->reject(function ($item) use ($emailsToSkip) {
            return $emailsToSkip->contains($item->email);
        })->map(function ($item) {
            $array = $item->toArray();

            return $array;
        });

        User::insert($karatUsersToInsert->toArray());
    }

    private function removeUsersThatAreNotInKaratAnymore( Collection $karatUsers, Collection $dbUsers )
    {
        $emailsInDbThatAreNotInKaratAnymore = $dbUsers->pluck('email' )->diff( $karatUsers->pluck('email'));

        User::whereIn('email', $emailsInDbThatAreNotInKaratAnymore)->delete();

    }


}