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;
+    }
+}

app/Models/Episode.php

@@ -160,6 +160,11 @@ class Episode extends Model implements Sitemapable
         return cache()->remember('episodeComments' . $this->id, 300, fn() => $this->comments->count());
     }
 
+    public function comments()
+    {
+        return $this->morphMany(Comment::class, 'commentable');
+    }
+
     public function getProblematicTags(): string
     {
         $problematicTags = ['Gore', 'Scat', 'Horror'];

app/Models/Presenters/CommentPresenter.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models\Presenters;
+
+use App\Models\Comment;
+use Illuminate\Support\Str;
+
+class CommentPresenter
+{
+    public $comment;
+
+    public function __construct(Comment $comment)
+    {
+        $this->comment = $comment;
+    }
+
+    public function markdownBody()
+    {
+        return Str::of($this->comment->body)->markdown([
+            'html_input' => 'strip',
+        ]);
+    }
+
+    public function relativeCreatedAt()
+    {
+        return $this->comment->created_at->diffForHumans();
+    }
+}