Add Livewire comment system

app/Models/Comment.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Presenters\CommentPresenter;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+
+class Comment extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var string[]
+     */
+    protected $fillable = [
+        'body'
+    ];
+
+    public function presenter()
+    {
+        return new CommentPresenter($this);
+    }
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function scopeParent(Builder $builder)
+    {
+        $builder->whereNull('parent_id');
+    }
+
+    public function children()
+    {
+        return $this->hasMany(Comment::class, 'parent_id')->oldest();
+    }
+
+    public function commentable()
+    {
+        return $this->morphTo();
+    }
+
+    public function parent()
+    {
+        return $this->hasOne(Comment::class, 'id', 'parent_id');
+    }
+
+    // Recursevly calculates how deep the nesting is
+    public function depth(): int
+    {
+        return $this->parent
+            ? $this->parent->depth() + 1
+            : 0;
+    }
+}