<?php

namespace Modules\Communication\Entities;

use App\User;
use Illuminate\Database\Eloquent\Model;

class ChatRoom extends Model
{
    protected $guarded = ['id'];

    protected $casts = [
        'last_message_at' => 'datetime',
    ];

    public function creator()
    {
        return $this->belongsTo(User::class, 'created_by');
    }

    public function members()
    {
        return $this->belongsToMany(User::class, 'chat_room_members', 'chat_room_id', 'user_id')
            ->withPivot('last_read_at')
            ->withTimestamps();
    }

    public function messages()
    {
        return $this->hasMany(ChatMessage::class)->orderBy('created_at');
    }

    public function latestMessage()
    {
        return $this->hasOne(ChatMessage::class)->latestOfMany();
    }
}