ladill-meet/app/Services/Meet/ParticipantPresenter.php

<?php

namespace App\Services\Meet;

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

class ParticipantPresenter
{
    /**
     * @param  Collection<int, Participant>  $participants
     */
    public static function avatarMap(Collection $participants, ?string $roomHostUserRef = null): Collection
    {
        $refs = $participants->pluck('user_ref')->filter();

        if ($roomHostUserRef) {
            $refs = $refs->push($roomHostUserRef)->unique();
        }

        if ($refs->isEmpty()) {
            return collect();
        }

        return User::query()
            ->whereIn('public_id', $refs->all())
            ->get()
            ->keyBy('public_id');
    }

    /**
     * @return array<string, mixed>
     */
    public static function toArray(Participant $participant, Collection $avatars, ?string $roomHostUserRef = null): array
    {
        return [
            'uuid' => $participant->uuid,
            'display_name' => $participant->display_name,
            'role' => $participant->role,
            'hand_raised' => $participant->hand_raised,
            'is_muted' => $participant->is_muted,
            'is_video_off' => $participant->is_video_off,
            'breakout_room_id' => $participant->breakout_room_id,
            'avatar_url' => self::avatarUrl($participant, $avatars, $roomHostUserRef),
        ];
    }

    public static function avatarUrl(Participant $participant, Collection $avatars, ?string $roomHostUserRef = null): ?string
    {
        if ($participant->user_ref) {
            $url = $avatars->get($participant->user_ref)?->avatarUrl();
            if ($url) {
                return $url;
            }
        }

        if (in_array($participant->role, ['host', 'co_host'], true) && $roomHostUserRef) {
            return $avatars->get($roomHostUserRef)?->avatarUrl();
        }

        return null;
    }
}