strprfcrm/app/Models/ChatMessage.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;

class ChatMessage extends Model
{
    use HasFactory;

    public const NOTIFICATION_NONE = 'none';
    public const NOTIFICATION_RESPONSIBLES = 'responsibles';
    public const NOTIFICATION_ALL = 'all';
    public const NOTIFICATION_USER = 'user';

    public const NOTIFICATION_TYPE_NAMES = [
        self::NOTIFICATION_NONE => 'Нет',
        self::NOTIFICATION_RESPONSIBLES => 'Админы, менеджер, бригадир',
        self::NOTIFICATION_ALL => 'Все',
        self::NOTIFICATION_USER => 'Конкретному пользователю',
    ];

    protected $fillable = [
        'order_id',
        'reclamation_id',
        'production_order_id',
        'user_id',
        'target_user_id',
        'notification_type',
        'message',
    ];

    public function order(): BelongsTo
    {
        return $this->belongsTo(Order::class);
    }

    public function reclamation(): BelongsTo
    {
        return $this->belongsTo(Reclamation::class);
    }

    public function productionOrder(): BelongsTo
    {
        return $this->belongsTo(ProductionOrder::class);
    }

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    public function targetUser(): BelongsTo
    {
        return $this->belongsTo(User::class, 'target_user_id');
    }

    public function notifiedUsers(): BelongsToMany
    {
        return $this->belongsToMany(User::class, 'chat_message_user');
    }

    public function files(): BelongsToMany
    {
        return $this->belongsToMany(File::class, 'chat_message_file')->withTimestamps();
    }
}